Anyone using the TC78 with the 1.15 AR?
05-29-2010, 09:53 AM
#7
Yes you will pick up another 40-50hp with the swap to the 1.15A/R. Ask the guys from Baker Engineering, they did some back to back with the .96A/R and then swapped to a 1.15A/R unit.
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05-29-2010, 02:32 PM
#9
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My TC76 W.96 a/r had so much backpressure the motor would fall on it's face at around 5000rpm, the car would start pulling hard and fall off about 5000rpm.
I ended up going to a larger freer breathing turbo with a 1.25a/r
Last edited by mike13; 05-29-2010 at 02:38 PM.
05-30-2010, 01:17 AM
#13
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I have a TC 78 & 383 also and found it fell on its face around 5000 rpm,
went to a 1.32 ar housing and its much better, spools just as fast and makes power all the way to the limiter.
Gonna try a race cover next.
went to a 1.32 ar housing and its much better, spools just as fast and makes power all the way to the limiter.
Gonna try a race cover next.
05-30-2010, 10:15 AM
#14
Sorry to hijack the thread, but have a question, I have a forged 383, Ported 317's, with a ported prof low intake im building, have a pt78 with a .96 exhaust. is that gonna hurt me, if so i'd rather change it before i finish mocking up the rest of the kit. Please lemme know, thanks
05-30-2010, 10:46 AM
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Sorry to hijack the thread, but have a question, I have a forged 383, Ported 317's, with a ported prof low intake im building, have a pt78 with a .96 exhaust. is that gonna hurt me, if so i'd rather change it before i finish mocking up the rest of the kit. Please lemme know, thanks
08-01-2010, 07:39 AM
#16
i know this is an old thread, but it kinda applies to me, I have a 383 that im building, pt78 with a .96 housing, and reading this thread, im guessing i should change to a bigger exhaust housing? If so, (kinda new with turbos) Do I just have to change the housing or do I need a new turbine wheel as well? Any help would be appreciated. Thanks, Dennis
08-01-2010, 05:25 PM
#18
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too many people attribute 'small housing = faster spool'.
at the end of the day, if its the same turbo/wheel, tis going to spool just about the same.
You wont notice the difference in terms of spool.
Your going to let the engine breath better and it will make more power per lb of 'boost'.
at the end of the day, if its the same turbo/wheel, tis going to spool just about the same.
You wont notice the difference in terms of spool.
Your going to let the engine breath better and it will make more power per lb of 'boost'.
08-01-2010, 05:27 PM
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S Yeah. Except I was answering the question about the wheel and housing. Good read though.
too many people attribute 'small housing = faster spool'.
at the end of the day, if its the same turbo/wheel, tis going to spool just about the same.
You wont notice the difference in terms of spool.
Your going to let the engine breath better and it will make more power per lb of 'boost'.
at the end of the day, if its the same turbo/wheel, tis going to spool just about the same.
You wont notice the difference in terms of spool.
Your going to let the engine breath better and it will make more power per lb of 'boost'.