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+--- Thread: OM602 Turbo choices..... (/showthread.php?tid=4498)
OM602 Turbo choices..... - Duncansport - 04-15-2013
Hello all. Long time M-B owner and tech, shop owner. Finally got another W124 1991 300D. Pump is going to Dieselmekin, intercooler and pipeing im building currently. So were down to the turbo choices here. I know everyone love the HX35, however im in fear of terrible spool time ect. Leaning a bit towards a HY35 as i think it may spool a bit quicker ( 100miles daily commute needs to still be ok for dail driving) But if im going through the trouble of milling my exhaust manifold for the T3 flange why not a T3/T4 base with a large wastegate for quick spool and good high RPM boost control. Or even the GT28 and keep the T25 flange? According to the math i need about 625CFM of flow. Again any insight, opinions...
Ben Duncan
RE: OM602 Turbo choices..... - Duncansport - 04-15-2013
This was my idea, T25/t4 hybrid, big external waste gate and a nice compressor section..
Turbine section thrid one down is a T25 flange T3 hot side
RE: OM602 Turbo choices..... - EDH_Performance - 04-15-2013
What is the hp target?
RE: OM602 Turbo choices..... - Duncansport - 04-15-2013
(04-15-2013, 03:08 PM)EDH_Performance What is the hp target?
250-275 tops... Transmission big limiter here.
RE: OM602 Turbo choices..... - EDH_Performance - 04-15-2013
(04-15-2013, 03:54 PM)Duncansport(04-15-2013, 03:08 PM)EDH_Performance What is the hp target?
250-275 tops... Transmission big limiter here.
Holset he221w FTW!!!! Have full pressure at 3000rpm on my small 1665ccm 8valve IDI bmw diesel with the big 7cm house
Is good for around 300hp
And has a t25 flange
RE: OM602 Turbo choices..... - willbhere4u - 04-15-2013
With the smaller exhaust flange the exhaust flow will be faster helping in low end spool up. but it will affect the exhaust flow at higher rpm if the turbo is a big one
RE: OM602 Turbo choices..... - Duncansport - 04-15-2013
(04-15-2013, 05:40 PM)willbhere4u With the smaller exhaust flange the exhaust flow will be faster helping in low end spool up. but it will affect the exhaust flow at higher rpm if the turbo is a big one
Thats the thinking with a oversize waste gate (44mm on a T25).... Perhaps not worth all the trouble though.
RE: OM602 Turbo choices..... - MFSuper90 - 04-17-2013
I think EDH is right. I wanted to put a he221 on my car, but can't find one for a decent price!
RE: OM602 Turbo choices..... - Duncansport - 04-17-2013
(04-17-2013, 04:45 PM)MFSuper90 I think EDH is right. I wanted to put a he221 on my car, but can't find one for a decent price!The compressor map does indeed say it to be a good fit. How ever i have yet to see on anywhere......
RE: OM602 Turbo choices..... - MFSuper90 - 04-19-2013
They are found on QSB and ISQ(?) cummins engines IIRC
Basically newer commonrail cummins. like the 4.5L and so on
RE: OM602 Turbo choices..... - EDH_Performance - 04-19-2013
(04-19-2013, 09:06 AM)MFSuper90 They are found on QSB and ISQ(?) cummins engines IIRC
Basically newer commonrail cummins. like the 4.5L and so on
and many commonrail 2.8 chineese ford i think
RE: OM602 Turbo choices..... - Duncansport - 04-19-2013
Looks like i may just settle for a H1C and a 944 waste gate set up. I think ill be going the route of the 717.432 in the next few months. Pump coming out this weekend then off to Dieselmeken.. Fun fun!!
Gotta get a M96 engine back together first though...
RE: OM602 Turbo choices..... - MFSuper90 - 04-21-2013
I wouldn't really recommend a H1C. Old and rather small compressor design. Some h1c's are REALLY small (44mm IIRC) and the bigger ones come with a giant exhaust housing. 18-21cm
But! If you have one laying around, I say go for it
RE: OM602 Turbo choices..... - Duncansport - 04-21-2013
(04-21-2013, 08:57 AM)MFSuper90 I wouldn't really recommend a H1C. Old and rather small compressor design. Some h1c's are REALLY small (44mm IIRC) and the bigger ones come with a giant exhaust housing. 18-21cm
But! If you have one laying around, I say go for it
Scored one for 100 so we'll give it a shot. Compressor map tells me 33lbs no problem. But might be a slow spool.....
Either way i still need a T3 flange on the exhaust manifold so if this H1C stinks then ill shoot for a HY35..