turbo for quick spool
Ive been doing some auto x this year and been using a to4b turbo with a t4 .96 exhaust. spool is so damn slow that i dont even hit full boost 95% of the time. I got a buddy that would give me a good deal on a to4e t4 .63 exhaust. I figured since i would only be in 1st and 2nd gear auto x'ing this would give me instant boost like i need. I only plan to run 15psi on it. Anybody ran into this problem? Any input would be appreciated.
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First you should get out of the parking lots and get on a real track. I kid, I kid. Swapping to a smaller exhaust would be the cheapest/easiest way to help your spooling issue. Plus it would give you the option of swapping back should you want to. I did the same thing on my WRX back in the day.
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Originally Posted by Sarusanj
(Post 9952792)
First you should get out of the parking lots and get on a real track. I kid, I kid. Swapping to a smaller exhaust would be the cheapest/easiest way to help your spooling issue. Plus it would give you the option of swapping back should you want to. I did the same thing on my WRX back in the day.
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switch to a twin scroll manifold, it makes a big difference
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Originally Posted by mzrx7man
(Post 9952787)
Ive been doing some auto x this year and been using a to4b turbo with a t4 .96 exhaust. spool is so damn slow that i dont even hit full boost 95% of the time. I got a buddy that would give me a good deal on a to4e t4 .63 exhaust. I figured since i would only be in 1st and 2nd gear auto x'ing this would give me instant boost like i need. I only plan to run 15psi on it. Anybody ran into this problem? Any input would be appreciated.
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Originally Posted by 1Revvin7
(Post 9953304)
In your signature it says T67. So which turbo do you have, a T67 or a To4B?
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Even with the biggest To4B you should have very fast spool. I have run a ton of them in the past, although I only ran one on a log style manifold( simliar A/Rs to yours 1.0~ish+). First thing I would do is check engine compression. Weak engines just do not create as much heat....
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I thought spoolup had to do with the turbine housing size and wheel?
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you should NOT be having lag issues with that turbo. I've autocrossed mine and was reaching full boost by 4K. Street ported motor. It was faster spool than stock. I think something else might be wrong, and you should definitely explore other possibilities, before you go dumping money down the wrong drain. Best of luck. We've all been there.
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