408 TT sizing
#1
408 TT sizing
Ran a pt88 on my old 370 and it worked great! Sold the motor kept the kit and turbo. Put together this 408 with that same old turbo and it's done making power around 5800rpm. Picked up a huron twin kit but now debating on turbo size. I'd like the car to pull to around 6300-6500. Anyone have any recommendations? How big on the turbine side do I need to achieve these kind of rpm?
#3
Dont necessarily have a power goal in mind. Looking for low 9s maybe clip an 8.9. I just dont know how to gauge sizing twins. The car has been 9.6s with the pt88 but my mph was like 137..the car falls flat after 5800rpm. Would like to carry the power out a little further and trap 145+
#4
TECH Junkie
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Dont necessarily have a power goal in mind. Looking for low 9s maybe clip an 8.9. I just dont know how to gauge sizing twins. The car has been 9.6s with the pt88 but my mph was like 137..the car falls flat after 5800rpm. Would like to carry the power out a little further and trap 145+
#7
Dont necessarily have a power goal in mind. Looking for low 9s maybe clip an 8.9. I just dont know how to gauge sizing twins. The car has been 9.6s with the pt88 but my mph was like 137..the car falls flat after 5800rpm. Would like to carry the power out a little further and trap 145+
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#8
137 was with the 408 I beleive I ran into back pressure issues with pt88 and 408...IATs would go insane once I clicked 3rd gear..I never actually measured it but can tell you I did blow out 2 exhaust gaskets from the manifold to crossover.
#11
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yea I would figure he doesn't wanna end up with too small on exhaust side. At least that's what I'm gathering from this post. I think hes trying to avoid the back pressure issues that caused his previous set up to fall off at 5800.
#14
No track times but I'm running T-Netics 66/65's with a .68 turbine. The turbine housings too small but puts out a Massive amount of torque. Only pulled it to 6400 and laid down something like 770/880. On the gate, don't remember how much boost pressure.
408 ci BTW. I think if I get larger housings I'll see the HP go up and the torque still be very high.
I'd go with billet turbo's in the mid 60's compressor range with a Med-High A/R T housing.
408 ci BTW. I think if I get larger housings I'll see the HP go up and the torque still be very high.
I'd go with billet turbo's in the mid 60's compressor range with a Med-High A/R T housing.
#20