dapiper Posted May 22, 2014 Share Posted May 22, 2014 Running old Turbonetics H3 which is at 18 psig is about out of air at 410 RWHP. Config is old BAE turbine inlet pipe with wastegaste flange using Tial 38 mm. Cam is mid turbo grind with peak power at 6250 RPM. Motor is 170 ci L28. Turbine is on center inlet. Target is 25 psig boost (550HP). Got fuel and drivetrain to match. Thinking of T62, but using OC hsg will cost me 15% loss spool, so they say. Not sure. Or I use the stock L28ET exh manif with a T3/T3 flange adapter into a GT35R or T62 with tang scroll hsg to help spool, but the T3 is restrictive. Which is less compromise? I like the idea of just using the OC hsg, since don't have to change much, incl new down pipe, but may not be worth the cost of a new turbo for lack of spool. Max power would be better. Really would like header turbo manif with ext wastegate. Does anyone still make these for the L28? My bud want's me to go 1JZ, since wide availability of aftermkt parts, but don't want a bastard. What do you think? Quote Link to comment Share on other sites More sharing options...
dexter72 Posted May 22, 2014 Share Posted May 22, 2014 I would do some more turbo research to find which one is better for your setup, without a power loss. Not sure if your car is a track or street car, maybe both. But swapping a 1J into your car will not be cheaper than finding the correct turbo for your setup. Just my opinion. I am huge fan of the 2J and am going to do a 2J NA-T swap this winter in my car. I think 400hp in a S30 is scary enough. 550 in an S30 is insane. ) Quote Link to comment Share on other sites More sharing options...
dapiper Posted May 23, 2014 Author Share Posted May 23, 2014 It's an engineering exersise. Need more area under the curve. Moovin' on up...... Quote Link to comment Share on other sites More sharing options...
Tony D Posted May 24, 2014 Share Posted May 24, 2014 (edited) Do some reading on the stock turbo manifold. Port out the turbine entrance properly and it's not restrictive. They are used successfully on cars making quite a bit more than your stated goal. In fact, one I know of is running a GT35R... Edited May 24, 2014 by Tony D Quote Link to comment Share on other sites More sharing options...
dapiper Posted May 27, 2014 Author Share Posted May 27, 2014 Tnx all fer comments. Quote Link to comment Share on other sites More sharing options...
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