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Just a little update for anypone who remembers the thread I wrote on DOHC turbo tuning (been two years...) on this DOHC turbo 2.0L "hybrid" Pontiac/Daewoo...
(previous thread for reference http://60degreev6.com/showthread.php?t=27919 )
With the new T3/T04E hybrid turbo and custom header, the engine made 307whp on 15psi. That would be 521whp on a 3.4! LOL!!!!!!!!!!! I estimate 375-380hp at the crank. I am still running the intake cam retarded one full tooth (15deg retarded) and the exh cam stock. The new turbo is real big for the 2L (it's one I bought for my 3400!). It has a T3 .84 a/r turbine housing with a custom GT35 wheel. I want to advance the exh cam to help it boost quicker (it doesn't reach full boost 'til 4200 from a 4th gear 2000rpm start), but I am limited to one full tooth and afraid of valve contact at the end of the exh stroke. I have sourced-out a set of adj cam gears for this engine from the UK, so that's the next step.
Read the first post in the old thread above for the background. There are HUGE gains for the 3.4DOHC engine if running a turbo that will make the "lazy" cammer a real torque monster. An appropriately sized turbo will only enhance the naturally aspirated tq curve of the 3400. With cam timing changes, you can get the advantage of fast boost offered by a too-small turbo AND the high end charge of a properly sized turbo!
(previous thread for reference http://60degreev6.com/showthread.php?t=27919 )
With the new T3/T04E hybrid turbo and custom header, the engine made 307whp on 15psi. That would be 521whp on a 3.4! LOL!!!!!!!!!!! I estimate 375-380hp at the crank. I am still running the intake cam retarded one full tooth (15deg retarded) and the exh cam stock. The new turbo is real big for the 2L (it's one I bought for my 3400!). It has a T3 .84 a/r turbine housing with a custom GT35 wheel. I want to advance the exh cam to help it boost quicker (it doesn't reach full boost 'til 4200 from a 4th gear 2000rpm start), but I am limited to one full tooth and afraid of valve contact at the end of the exh stroke. I have sourced-out a set of adj cam gears for this engine from the UK, so that's the next step.
Read the first post in the old thread above for the background. There are HUGE gains for the 3.4DOHC engine if running a turbo that will make the "lazy" cammer a real torque monster. An appropriately sized turbo will only enhance the naturally aspirated tq curve of the 3400. With cam timing changes, you can get the advantage of fast boost offered by a too-small turbo AND the high end charge of a properly sized turbo!
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