Turbo spoolin times?
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Joined: Nov 2002
Posts: 59
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From: Dundas, Canada
Turbo spoolin times?
Just wondering what contributes to identical turbos spoolin up at different rates. Does a 3" exhaust have a lot to do with how fast the turbo spools. I have t3/t4 and mine fully spools at about 4500rpm. My buddy has the same size but is in full boost around 3400rpm. So what gives? Im running a drag kit with a 2.25 exhaust, dsm injectors,hondata stage2,etc.. My compression is around 9-1. Does the lower compression have something to do with it? Frankly im lost and would love some suggestions. Im sure the exhaust is a major problem but you guys no more than me. Any help would be awsome. Thanx.
Honda-Tech Member
Joined: Sep 2002
Posts: 495
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From: N Ogden, UT, USA
Re: Turbo spoolin times? (turbo se)
Exhaust piping diameter, Wastegate adjustment/condition, A/F ratio, timing, fuel octane, the comp and turbine specs (a/r, etc.) of the turbos, the engine's static/dynamic compression, length of exhaust piping, bore size.
I think I probably left something out, but this should give you some idea. I would also check for cracks in the manifold, or leaks in the piping, as well as turbocharger condition/health of bearings.
Happy Boosting!
I think I probably left something out, but this should give you some idea. I would also check for cracks in the manifold, or leaks in the piping, as well as turbocharger condition/health of bearings.
Happy Boosting!
Honda-Tech Member
Joined: Apr 2003
Posts: 1,364
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From: Ottawa, ON
I just had the same problem. My set-up has the same turbo but I run an internal wastegate, and the stock actuator was open all the time for 9psi...so pick up a smaller actuator and put it on for 6 psi. Now it,s closed and I run a MBC to open at 9 psi. Sppol time went from 4700 to 3900rpm. It's like a totally different car now. If you have an external gate though, different story for ya then.
Joined: Mar 2003
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From: usa
Re: Turbo spoolin times? (Speedworks801)
[QUOTE=Speedworks801]Exhaust piping diameter, Wastegate adjustment/condition, A/F ratio, timing, fuel octane, the comp and turbine specs (a/r, etc.) of the turbos, the engine's static/dynamic compression, length of exhaust piping, bore size.
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Re: Turbo spoolin times? (turbo se)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbo se »</TD></TR><TR><TD CLASS="quote">thanx for all the input guys i hope things will be better after the 3" mandrel bent exhaust and the tuning is done. 
</TD></TR></TABLE>
The 3" should make a HUGE difference. 2.25" is just too small for a turbo app.
</TD></TR></TABLE>The 3" should make a HUGE difference. 2.25" is just too small for a turbo app.
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