T3 to large for stock?
T3 to large for stock?
![[Image: exhaust_flanges1.jpg]](http://www.w124performance.com/images/OM603_exhaust/exhaust_flanges1.jpg)
As the t3 is used for some quite large turbos this leads me to believe that we are really on the minimum side of usability of the t3 flange. I am hoping the smaller flange makes for quicker spool without much impact on the back pressure. As you can see the t25 flange is about the same or a little larger than the 606.
If this works out well I think I will probably get a t25 flanged turbo for my w123 as well.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
So I got my HY30W for the w124 and it has a t25 flange. This was a bit of a surprise but it got me thinking. As far as I can tell the hy30w flows about 1.5 better than the stock turbo and at 1.5 more pressure. Each exhaust runner is slightly smaller than the t25. For stock fueling it seems to me that a t25 flanged turbo is a better match than the t3s.
As the t3 is used for some quite large turbos this leads me to believe that we are really on the minimum side of usability of the t3 flange. I am hoping the smaller flange makes for quicker spool without much impact on the back pressure. As you can see the t25 flange is about the same or a little larger than the 606.
If this works out well I think I will probably get a t25 flanged turbo for my w123 as well.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
Finding a t25 flanged turbo isn't as easy and the selection isnt as great as the "standard" t3.
You will increase velocity but at the expense of turbo drive pressure and egts.
You can try a Mitsubishi turbo. Something like tdo4-4. Still a t3 flange but it's a newer design turbo. I have one at the shop I can take a few pics of.
-Jesse
80 300sd hy35, front mount intercooler, w115 intake, rack limiter removed, Alda removed, full load turned up, boost, ebp, trans, pyro, egr delete, 3.5" exhaust, e-fan, 16x8 rims with, 245/50 tires, lowered, bilstien 5100's, 12" front brakes, 2.65:1 diff.
97 f250 psd 4x4, crawler
70 f250 390
83 Volvo 242, lots of mods
66 Volvo amazon
10 mistsubishi fuso service truck.
True there are some large t3 flanged turbos. I have a hx40 with a t3 divided flange. My hy35 is a single scroll t3 flange.
Finding a t25 flanged turbo isn't as easy and the selection isnt as great as the "standard" t3.
You will increase velocity but at the expense of turbo drive pressure and egts.
You can try a Mitsubishi turbo. Something like tdo4-4. Still a t3 flange but it's a newer design turbo. I have one at the shop I can take a few pics of.
-Jesse
80 300sd hy35, front mount intercooler, w115 intake, rack limiter removed, Alda removed, full load turned up, boost, ebp, trans, pyro, egr delete, 3.5" exhaust, e-fan, 16x8 rims with, 245/50 tires, lowered, bilstien 5100's, 12" front brakes, 2.65:1 diff.
97 f250 psd 4x4, crawler
70 f250 390
83 Volvo 242, lots of mods
66 Volvo amazon
10 mistsubishi fuso service truck.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
06-21-2011, 03:34 PM #3I haqve always wondered why the T3 was used on the 617 since it doesn't flow anything really.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
06-24-2011, 07:06 PM #5yes it dose!
1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
sorry to thread jack
cars? what cars? WHERE???
randomdude
06-24-2011, 08:16 PM #6what flange is a nonegr mani? whats the biggest "plug and play" for a nonegr mani?
sorry to thread jack
cars? what cars? WHERE???
Take a look! http://www.superturbodiesel.com/std/show...t+manifold
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
06-24-2011, 08:55 PM #7Non EGR also uses the T3, same as the EGR manifold.
Take a look! http://www.superturbodiesel.com/std/show...t+manifold
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
cars? what cars? WHERE???
randomdude
06-24-2011, 10:05 PM #8oh nice! thanks for the linkie. ive had my head under the hood of nothing but volvos for the last 8 years even tho ive been looking for one of these. im trying to soak up as much as i can as fast as i can so i dont have to ask the silly nooob questions lol.
cars? what cars? WHERE???
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