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

How restrictive is the stock ex. manifold?

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Old Jan 9, 2006 | 11:05 PM
  #26  
NZConvertible's Avatar
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Originally Posted by Dom_C
I wish I could atest to it's sole performance improvments but I also installed the rtek 1.5 at the same time.
That chip should have no effect on performance, so any gains you got must've been from the manifold.
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Old Jan 9, 2006 | 11:47 PM
  #27  
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I thought the chip had refined fuel maps, and such? hmm Another thing I can atest to having an increase in performance is that before the rtek I had no fcd so I was not able to really push the car at all because of fuel cut. I do have other mods though, I have a full 3 inch racing beat turbo back exhaust, ported wastegate (seeing about 9-10psi through 1st and 2nd, and 12 or so in the above gears) Walbro fuel pump, 3 inch TID, No emisions, throttle body mod, I think that's it but could be missing something. after finally porting the wastegate getting the rtek and putting on this manifold I'm finally able to really push the car a little bit. I could have swore that the rtek offered a little bit of an increase in performance, hmmm maybe I'm wrong. I did notice that the whole manifold will glow, before the turbo would often glow, but the manifold wouldn't, now with the ssac unit the whole thing glows .. crazy. looks pretty cool though.
Dom
Dom
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Old Jan 9, 2006 | 11:48 PM
  #28  
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nope, the chip is more of a safeguard to protect the motor, the fuel maps are untouched.

the only performance gain is a slightly broader powerband as the secondary staging is moved down to 3500 RPMs from 3680.
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Old Jan 10, 2006 | 01:01 AM
  #29  
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From: Auckland, New Zealand
Originally Posted by Dom_C
I thought the chip had refined fuel maps, and such?
No, go read the website. All the 1.5 does is eliminate the overboost fuel cut and AWS, add a fuel cut for clearing an engine flood, lower secondary staging rpm, increase primary injector duty cycle cap and timing retard above 9psi.

Another thing I can atest to having an increase in performance is that before the rtek I had no fcd so I was not able to really push the car at all because of fuel cut.
The performance comes from the extra boost, not the chip as such.

Originally Posted by Karack
the only performance gain is a slightly broader powerband as the secondary staging is moved down to 3500 RPMs from 3680.
That does nothing to increase power, it just reduces the chance of the primaries running out of capacity before the secondaries come in.
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Old Jan 10, 2006 | 01:32 AM
  #30  
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1.5 doesn't have fuel cut for clear flood, they added it for the 1.7
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Old Jan 10, 2006 | 05:48 PM
  #31  
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From: Auckland, New Zealand
Yep, my bad.
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