Thread: GTIR SR20VET Dyno Predictions: Going with VE Intake and Xcessive Plenum :)

Why dont you agree i would like to hear this.

I ''begged'' because i researched on the sr20 forums and i have eyes to see how much bigger those ve intake runners are compared to the small gtir ones, the car is used only for drag racing. I didnt want them have to unwanted issues with the car as im the research guy and the ve head was sort of an experiment hehe, especially to the fact that the injectors would be further back also.

Well I don't agree as there are many benefits, however it does depend on what the car is used for.

Going from stock manifold and stock throttle body there will be an increase in power, that increase will depend on how serious the build is. I have seen this. stock ve to stock gtir and there was an increase on a turbo. Have also seen 4age itb's on a na ve helped with top end power, but the biggest increase was in the midrange.

Yes you can also get that same increase in power by going larger throttle body with manifold to suit. but then you can turn the gas pedal into a light switch. Where with the gtir throttles you will have a much more progressive throttle input. Meaning the car can be faster mid corner with the right driver.

I will add that for a drag car. bigger throttle and less tuning is the way. No benifit going gtir throttles

sr20gti-r is a tuner I am guessing so totally understand his hatred for itb's. The haltech platinum range has some cool itb features my mate has been plying with. If you have a good haltech tunner near you I would put a p1000 on it and call it a day.

Ah if the car is used for drag you are right. I would sell of the gtir intake and adapter to someone who will use it. dummy up a 70mm tb from another car

Plenum based ITB's on a MAF vehicle are not difficult to tune.

Even on a non-plenum system, tuning ITB's is not too difficult, especially with the AEM.

The gti-r runners are way to small for the VE inlet design. Besides the larger plenum there is no benefit to be had in any way, shape or form on a VE head.

agreed that the runner size and even the throttle size is not ideal, but still have seen gains. In saying that since it is not an easy bolt on I wouldn't bother. There are better options

@Jamie and Cliff, how would you guys go about tuning the Dwell times? Just hit the dyno and see what makes the most power, or is there another more mathematic way?

Im neither of those guys but here goes...

the dwell to batter voltage table allows you to increase dwell time when compared to battery voltage ie. the lower the voltage, the more the increased dwell to provide that better spark, but they decrease the dwell with the higher voltage which is probably where is a good place mess around with when trying to pull more out of your stock ign

Lol. I have tried this with very limited results. I have my water meth injection setup to trigger the nitrous maps on my aem. You can't do that by adjusting fpr or the base timing