2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

n/a rotors vs. tii rotors

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Old Sep 28, 2008 | 01:23 AM
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From: Andrews AFB, MD
HI n/a rotors vs. tii rotors

Is there a big flow difference between the two? Im trying to narrow some things down for the low numbers on my bridgeport. More so like 170hp or so with 10psi going through. I got all the supporting mods, just doesn't seem to be wanting to flow out the power.
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Old Sep 28, 2008 | 01:25 AM
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n/a rotors are higher compression then turbo rotors, but I don't think there is any flow difference. Sounds like a tuning issue?
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Old Sep 28, 2008 | 10:55 AM
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Is it tuned?

How big is the hot side?
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Old Sep 28, 2008 | 11:05 AM
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first thing to do is pressure test for boost leaks
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Old Sep 28, 2008 | 12:25 PM
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From: Andrews AFB, MD
Originally Posted by Aaron Cake
Is it tuned?

How big is the hot side?
I'd rather not throw out the tuners name out there, the hotside is suppose to be a p-trim and we found the comp side matches with the to4e "60" measurements. Mind the mess, was changing the fuel system. The couplers are not like that anymore as well it's just one 90 degree bend coupler now, and got a new bigger k&n filter.


Last edited by Houstonderk; Sep 28, 2008 at 12:27 PM.
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Old Sep 28, 2008 | 03:10 PM
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Well, without knowing how it's tuned it's hard to say.

It could be drowning in fuel. What A/F ratio is it running under boost? Timing advance?

That turbo isn't really going to be making much at 10 PSI. Try 15.

But my guess is that there's too much fuel and not enough timing.
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Old Sep 28, 2008 | 04:13 PM
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From: Andrews AFB, MD
Well I'm pretty much trusting this guy as hes one of the best so people say, and guessing im in hawaii you could guess who it would be. I try to keep it around 11-12 under boost. It seems to stay at 10-12psi and cannot go higher, and with the 10psi spring with the haltech boost controller its probably at its limit for now as boost goes. Here is the latest map. At the 5k is where there was a wall and the boost started to drop. Don't have an afr map for it because they were tuning against the power map on the dynapack.
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