STD Other Projects Twin charged Ford F1 pick up 606,603 pump.

Twin charged Ford F1 pick up 606,603 pump.

Twin charged Ford F1 pick up 606,603 pump.

 
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48 Ford
Naturally-aspirated

12
10-23-2013, 02:31 PM #1
Hi there,my name is Trevor and I am from the south of England.I came across this site after building my truck and thought it may be of interest out there.So here goes .Started with a 48 Ford with 49 Merc flattie and stock axles etc. Fitted 606 from a 98 W210 and pump from 603 turbo.Has the 6mm elements swapped etc.and set up on pump rig.Injectors shimmed for a bit more pressure.Turbo converted to pressure operated poppet valve.5 speed box and flywheel from C250TD and auto 2 piece prop.Huge Cosworth RS500 intercooler and all hard pipes.Remote twin oil filters and cooler.Set up at 10psi at moment. Hiedts Mustang 2 based front end and power rack etc. Ford 9" axle and 5 link rear on coil overs. Land Rover Discovery pedal box. And the blower, M62. ..........Designed to blow into turbo intake on low RPM.But doesn't make enough boost to help.1-2 psi just off idle! So am looking into a smaller pulley set up which is still early days,(ANY IDEAS WELCOME) so there you go,this thing really flies and sounds awesome (3" open exhaust).Hope you like it if the pics are visible.If not http://s277.photobucket.com/user/trev040/library/

[Image: 007.jpg]
[Image: 006.jpg]
[Image: 004.jpg]
[Image: 002.jpg]
This post was last modified: 10-24-2013, 07:44 AM by 48 Ford.
48 Ford
10-23-2013, 02:31 PM #1

Hi there,my name is Trevor and I am from the south of England.I came across this site after building my truck and thought it may be of interest out there.So here goes .Started with a 48 Ford with 49 Merc flattie and stock axles etc. Fitted 606 from a 98 W210 and pump from 603 turbo.Has the 6mm elements swapped etc.and set up on pump rig.Injectors shimmed for a bit more pressure.Turbo converted to pressure operated poppet valve.5 speed box and flywheel from C250TD and auto 2 piece prop.Huge Cosworth RS500 intercooler and all hard pipes.Remote twin oil filters and cooler.Set up at 10psi at moment. Hiedts Mustang 2 based front end and power rack etc. Ford 9" axle and 5 link rear on coil overs. Land Rover Discovery pedal box. And the blower, M62. ..........Designed to blow into turbo intake on low RPM.But doesn't make enough boost to help.1-2 psi just off idle! So am looking into a smaller pulley set up which is still early days,(ANY IDEAS WELCOME) so there you go,this thing really flies and sounds awesome (3" open exhaust).Hope you like it if the pics are visible.If not http://s277.photobucket.com/user/trev040/library/

[Image: 007.jpg]
[Image: 006.jpg]
[Image: 004.jpg]
[Image: 002.jpg]

mantahead
Holset

600
10-23-2013, 04:07 PM #2
very nice.
mantahead
10-23-2013, 04:07 PM #2

very nice.

JB3
Superturbo

1,795
10-23-2013, 05:30 PM #3
this description requires numerous pictures please. Big Grin

1974 240D 617 turbo swap, W201 5-speed, in the works project
1983 240D 616 stock, DD
1989 Chevy Astro, 617 turbo swap, T5 5-speed, 4.56 diff, work van

JB3
10-23-2013, 05:30 PM #3

this description requires numerous pictures please. Big Grin


1974 240D 617 turbo swap, W201 5-speed, in the works project
1983 240D 616 stock, DD
1989 Chevy Astro, 617 turbo swap, T5 5-speed, 4.56 diff, work van

MFSuper90
Budget Builder

1,533
10-23-2013, 09:47 PM #4
hmmm, my idea is bigger turbo Wink

that truck is so sexy!

Edit: did a littl research, m62 pulleys all over the place! Google m62 supercharger pulleys and you will find everything you need to go to a faster setup
This post was last modified: 10-24-2013, 08:34 AM by MFSuper90.

'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler Big Grin
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted         
MFSuper90
10-23-2013, 09:47 PM #4

hmmm, my idea is bigger turbo Wink

that truck is so sexy!

Edit: did a littl research, m62 pulleys all over the place! Google m62 supercharger pulleys and you will find everything you need to go to a faster setup


'82 300D -3" straight pipe, ALDA deleted, 3in1 glowshift gauge, HX30, egr-less manifold, A/W intercooler Big Grin
'14 Ram 6.7l cummins -G56 handshaker, wishing it was deleted         

sassparilla_kid
diesel > all other fuels

1,618
10-23-2013, 09:53 PM #5
Oh damn, that's sexy.........

-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
sassparilla_kid
10-23-2013, 09:53 PM #5

Oh damn, that's sexy.........


-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!

whipplem104
Holset

559
10-24-2013, 08:28 AM #6
1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.
whipplem104
10-24-2013, 08:28 AM #6

1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

48 Ford
Naturally-aspirated

12
10-24-2013, 09:18 AM #7
(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!
48 Ford
10-24-2013, 09:18 AM #7

(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!

willbhere4u
Six in a row make her go!

2,507
10-24-2013, 10:01 AM #8

I found this on one of the Subaru forums some one who made a smaller clutched pulley for a similar supercharger setupBig Grin
This post was last modified: 10-24-2013, 10:02 AM by willbhere4u.

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
10-24-2013, 10:01 AM #8


I found this on one of the Subaru forums some one who made a smaller clutched pulley for a similar supercharger setupBig Grin


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

dieselmeken
Holset

407
10-24-2013, 10:08 AM #9
I like that setup alot.
dieselmeken
10-24-2013, 10:08 AM #9

I like that setup alot.

whipplem104
Holset

559
10-24-2013, 06:11 PM #10
(10-24-2013, 09:18 AM)48 Ford
(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!

The problem is those superchargers are just to small. I used one early on and machined an alternator pulley to press on the bearing and then welded the drive to the pulley basically. It would make about 6lbs of boost but it was just spinning the supercharger to fast. Lots of heat and blew a few of them up.
whipplem104
10-24-2013, 06:11 PM #10

(10-24-2013, 09:18 AM)48 Ford
(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!

The problem is those superchargers are just to small. I used one early on and machined an alternator pulley to press on the bearing and then welded the drive to the pulley basically. It would make about 6lbs of boost but it was just spinning the supercharger to fast. Lots of heat and blew a few of them up.

48 Ford
Naturally-aspirated

12
10-25-2013, 01:37 PM #11
(10-24-2013, 06:11 PM)whipplem104
(10-24-2013, 09:18 AM)48 Ford
(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!

The problem is those superchargers are just to small. I used one early on and machined an alternator pulley to press on the bearing and then welded the drive to the pulley basically. It would make about 6lbs of boost but it was just spinning the supercharger to fast. Lots of heat and blew a few of them up.

Did you keep the clutch working? I was hoping to use it at low rpm and load until the turbo got up to speed and have it swichable to prolong its life
48 Ford
10-25-2013, 01:37 PM #11

(10-24-2013, 06:11 PM)whipplem104
(10-24-2013, 09:18 AM)48 Ford
(10-24-2013, 08:28 AM)whipplem104 1st off it looks good. Love the truck. I think that you are not really able to make boost with the supercharger though by the pictures. You would need a bypass valve or reed plate to prevent the air from blowing out the turbo inlet pipe the wrong way. You could put a throttle actuator on there and have it activate with the supercharger clutch.
Oh also did you just flip the stock intake manifold over? You must have made an adapter plate for that. Great idea for fitment.

Hi,I did block the end off with a bypass valve,those pics bit out of date,I think it needs a smaller pulley from somewhere or something,the intake flipped straight over,just needed a few holes drilling and tapping,only one or two wouldn't line up,good enough for me !!

The problem is those superchargers are just to small. I used one early on and machined an alternator pulley to press on the bearing and then welded the drive to the pulley basically. It would make about 6lbs of boost but it was just spinning the supercharger to fast. Lots of heat and blew a few of them up.

Did you keep the clutch working? I was hoping to use it at low rpm and load until the turbo got up to speed and have it swichable to prolong its life

willbhere4u
Six in a row make her go!

2,507
10-25-2013, 03:23 PM #12
The one on the Subaru video is still clutched

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
10-25-2013, 03:23 PM #12

The one on the Subaru video is still clutched


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

Tito
Holset

354
10-26-2013, 06:22 AM #13
Nice ride! I love it. But in my opinion it needs a bigger turbo.
Tito
10-26-2013, 06:22 AM #13

Nice ride! I love it. But in my opinion it needs a bigger turbo.

whipplem104
Holset

559
10-26-2013, 08:18 AM #14
No. I just made it a fixed pulley. If you want a larger clutched supercharger get one off of a C32. That would be the right size for what you are trying to do.
whipplem104
10-26-2013, 08:18 AM #14

No. I just made it a fixed pulley. If you want a larger clutched supercharger get one off of a C32. That would be the right size for what you are trying to do.

48 Ford
Naturally-aspirated

12
10-26-2013, 12:28 PM #15
(10-26-2013, 06:22 AM)Tito Nice ride! I love it. But in my opinion it needs a bigger turbo.

I thought about it but I was informed by the guy who built the pump that the compensator diaphragm wouldn't hold much above a bar which I can get with the stock modified one. Maybe its something I can play around with later on.Also its is our shop truck and how mad do you go ??

(10-26-2013, 08:18 AM)whipplem104 No. I just made it a fixed pulley. If you want a larger clutched supercharger get one off of a C32. That would be the right size for what you are trying to do.

Thanks for that info,I will look into that one.
This post was last modified: 10-26-2013, 12:33 PM by 48 Ford.
48 Ford
10-26-2013, 12:28 PM #15

(10-26-2013, 06:22 AM)Tito Nice ride! I love it. But in my opinion it needs a bigger turbo.

I thought about it but I was informed by the guy who built the pump that the compensator diaphragm wouldn't hold much above a bar which I can get with the stock modified one. Maybe its something I can play around with later on.Also its is our shop truck and how mad do you go ??

(10-26-2013, 08:18 AM)whipplem104 No. I just made it a fixed pulley. If you want a larger clutched supercharger get one off of a C32. That would be the right size for what you are trying to do.

Thanks for that info,I will look into that one.

winmutt
bitbanger

3,468
10-30-2013, 09:43 AM #16
Moar pics. Looks great!

1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
winmutt
10-30-2013, 09:43 AM #16

Moar pics. Looks great!


1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42

muuris
OM605

318
10-31-2013, 03:52 AM #17
Nice build! The old Ford pickups are glamorous.

If you want power, you'll need to change both the supercharger and the stock turbo.

The original turbo's wastegate is vacuum controlled because it is open on light throttle to prevent high backpressure and to increase mpg. That alone tells you that the turbo is small, converting it to normal boost controlled means you'll got "enough" heat on the turbine side all the time. The turbo is good for around 200hp, no matter if you twin charge it because the turbine just won't flow more..

Also, if changing to a bigger turbo, make a proper exhaust manifold. In my experience, stock manifold won't limit power when under 400hp, but it slows down spool-up several hundred rpms.

Supercharger on OM606 needs to be big to make any sense. But since you are running 6mm elements, I see no point in supercharger whatsoever. 6mm elements won't get you to 300hp, and under that, a properly sized turbo will spool up quickly. Adding a supercharger makes things just more complex with arguable benefits. If not bypassed on high rpms, it also eats up power.
This post was last modified: 10-31-2013, 03:53 AM by muuris.
muuris
10-31-2013, 03:52 AM #17

Nice build! The old Ford pickups are glamorous.

If you want power, you'll need to change both the supercharger and the stock turbo.

The original turbo's wastegate is vacuum controlled because it is open on light throttle to prevent high backpressure and to increase mpg. That alone tells you that the turbo is small, converting it to normal boost controlled means you'll got "enough" heat on the turbine side all the time. The turbo is good for around 200hp, no matter if you twin charge it because the turbine just won't flow more..

Also, if changing to a bigger turbo, make a proper exhaust manifold. In my experience, stock manifold won't limit power when under 400hp, but it slows down spool-up several hundred rpms.

Supercharger on OM606 needs to be big to make any sense. But since you are running 6mm elements, I see no point in supercharger whatsoever. 6mm elements won't get you to 300hp, and under that, a properly sized turbo will spool up quickly. Adding a supercharger makes things just more complex with arguable benefits. If not bypassed on high rpms, it also eats up power.

48 Ford
Naturally-aspirated

12
11-01-2013, 03:02 PM #18
(10-31-2013, 03:52 AM)muuris Nice build! The old Ford pickups are glamorous.

If you want power, you'll need to change both the supercharger and the stock turbo.

The original turbo's wastegate is vacuum controlled because it is open on light throttle to prevent high backpressure and to increase mpg. That alone tells you that the turbo is small, converting it to normal boost controlled means you'll got "enough" heat on the turbine side all the time. The turbo is good for around 200hp, no matter if you twin charge it because the turbine just won't flow more..

Also, if changing to a bigger turbo, make a proper exhaust manifold. In my experience, stock manifold won't limit power when under 400hp, but it slows down spool-up several hundred rpms.

Supercharger on OM606 needs to be big to make any sense. But since you are running 6mm elements, I see no point in supercharger whatsoever. 6mm elements won't get you to 300hp, and under that, a properly sized turbo will spool up quickly. Adding a supercharger makes things just more complex with arguable benefits. If not bypassed on high rpms, it also eats up power.

Hi ya ,thanks for input ,sometimes you just try stuff to see what happens,blower is disconnected most of the time so doesn't affect top end.Idea was to pressurize intake of turbo at lower rpm and load and shut it off when pressure dropped.
48 Ford
11-01-2013, 03:02 PM #18

(10-31-2013, 03:52 AM)muuris Nice build! The old Ford pickups are glamorous.

If you want power, you'll need to change both the supercharger and the stock turbo.

The original turbo's wastegate is vacuum controlled because it is open on light throttle to prevent high backpressure and to increase mpg. That alone tells you that the turbo is small, converting it to normal boost controlled means you'll got "enough" heat on the turbine side all the time. The turbo is good for around 200hp, no matter if you twin charge it because the turbine just won't flow more..

Also, if changing to a bigger turbo, make a proper exhaust manifold. In my experience, stock manifold won't limit power when under 400hp, but it slows down spool-up several hundred rpms.

Supercharger on OM606 needs to be big to make any sense. But since you are running 6mm elements, I see no point in supercharger whatsoever. 6mm elements won't get you to 300hp, and under that, a properly sized turbo will spool up quickly. Adding a supercharger makes things just more complex with arguable benefits. If not bypassed on high rpms, it also eats up power.

Hi ya ,thanks for input ,sometimes you just try stuff to see what happens,blower is disconnected most of the time so doesn't affect top end.Idea was to pressurize intake of turbo at lower rpm and load and shut it off when pressure dropped.

NGARover
GTA2056V

99
11-01-2013, 06:18 PM #19
Nice. really nice...
NGARover
11-01-2013, 06:18 PM #19

Nice. really nice...

Hario'
C300TD Wagon (W202)

894
11-05-2013, 08:05 AM #20
Have you throught about compounding by feeding the supercharger directly from the tubo? The pressure at the inlet of the supercharger provided by the turbo helps to offset the fall in efficiency of the supercharger as revs rise because as the supercharger inlet pressure rises it maintains a lower PR across the SC keeping seat down (somewhat).




Installed:

OM606/722.6, big IC, W220 brakes.
Planned:
DIY manifold, compound, 722.6 controller, built IP.
[i]Less rust.. 
[/i]
Hario'
11-05-2013, 08:05 AM #20

Have you throught about compounding by feeding the supercharger directly from the tubo? The pressure at the inlet of the supercharger provided by the turbo helps to offset the fall in efficiency of the supercharger as revs rise because as the supercharger inlet pressure rises it maintains a lower PR across the SC keeping seat down (somewhat).





Installed:

OM606/722.6, big IC, W220 brakes.
Planned:
DIY manifold, compound, 722.6 controller, built IP.
[i]Less rust.. 
[/i]

48 Ford
Naturally-aspirated

12
11-08-2013, 02:23 PM #21
(11-05-2013, 08:05 AM)Hario Have you throught about compounding by feeding the supercharger directly from the tubo? The pressure at the inlet of the supercharger provided by the turbo helps to offset the fall in efficiency of the supercharger as revs rise because as the supercharger inlet pressure rises it maintains a lower PR across the SC keeping seat down (somewhat).
I thought about something like this,

[Image: 4agztescon.jpg]doing that with a [Image: 4agztetbon.jpg]bypass valve in the system[Image: 4agzteconcept2.jpg]
48 Ford
11-08-2013, 02:23 PM #21

(11-05-2013, 08:05 AM)Hario Have you throught about compounding by feeding the supercharger directly from the tubo? The pressure at the inlet of the supercharger provided by the turbo helps to offset the fall in efficiency of the supercharger as revs rise because as the supercharger inlet pressure rises it maintains a lower PR across the SC keeping seat down (somewhat).
I thought about something like this,

[Image: 4agztescon.jpg]doing that with a [Image: 4agztetbon.jpg]bypass valve in the system[Image: 4agzteconcept2.jpg]

Ksteen2
Holset

304
11-12-2013, 05:29 AM #22
that's the same methode that EDH used on his 190D
and that worked great.
I think thats the best way Wink

1#
Volvo 940 estate 1995
Originaly a d24tic
Changed to OM606.962 From the old 81 Benz
4" dp, 3,5" stainless from DP out.
8mm dieselmeken pump att 180cc
BW kkk K29 turbo, 15cm hot side
home made flywheel with sachs 765PP and original mercedes 240mm organic disc  
6speed cdi box
4,5" humongus cooler
Please wait, loading boost
Ksteen2
11-12-2013, 05:29 AM #22

that's the same methode that EDH used on his 190D
and that worked great.
I think thats the best way Wink


1#
Volvo 940 estate 1995
Originaly a d24tic
Changed to OM606.962 From the old 81 Benz
4" dp, 3,5" stainless from DP out.
8mm dieselmeken pump att 180cc
BW kkk K29 turbo, 15cm hot side
home made flywheel with sachs 765PP and original mercedes 240mm organic disc  
6speed cdi box
4,5" humongus cooler
Please wait, loading boost

48 Ford
Naturally-aspirated

12
11-15-2013, 02:53 PM #23
Turned the boost up to 14psi today,feels much better,anyone think that is enough or should I squeeze it a bit more??
48 Ford
11-15-2013, 02:53 PM #23

Turned the boost up to 14psi today,feels much better,anyone think that is enough or should I squeeze it a bit more??

muuris
OM605

318
11-15-2013, 03:06 PM #24
IMO you shouln't squeeze even that with stock turbo! The factory setup gives 18psi on low revs but boost goes down to 11psi on revs. That is because of the tiny turbine housing making decent backpressure, and with increased fueling, the situation gets worse. It not about the boost gauge reading, it's about how much air is flowing through the engine. 12psi boost/14psi backpressure is much, much better than 15psi boost/30psi backpressure.

Get exhaust pressure (or temperature) gauge before blowing the engine. It's a bit different since you have supercharger, but all the exhaust is still going through the turbo.
This post was last modified: 11-15-2013, 03:07 PM by muuris.
muuris
11-15-2013, 03:06 PM #24

IMO you shouln't squeeze even that with stock turbo! The factory setup gives 18psi on low revs but boost goes down to 11psi on revs. That is because of the tiny turbine housing making decent backpressure, and with increased fueling, the situation gets worse. It not about the boost gauge reading, it's about how much air is flowing through the engine. 12psi boost/14psi backpressure is much, much better than 15psi boost/30psi backpressure.

Get exhaust pressure (or temperature) gauge before blowing the engine. It's a bit different since you have supercharger, but all the exhaust is still going through the turbo.

 
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