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

Lol you don't know how many times I hear that.

I'm almost ready to give up preaching

This put me on the floor!

Holy Crap Guys , I forgot to mention , Its a GTIR DET 8.5 CR Program being used on a 9.3 CR VE Head, he didnt send back for a retune , Guessing that the reason for using so low of fuel pressure, another thing they did which i didnt agree with was using back the GTIR intake and making an adapter for it which means the Injectors are further Back some inches before the original position, I begged them to use the regular VE Intake.

Compression ration has nothing to do with fueling within a JWT.

The only difference between the 8.5:1 and 9.5:1 program is timing.

With the injector moved back from its original position how is he adjusting dwell time?

Reason number 2,567 why a standalone is needed.

Damn , whats dwell time

Injector timing is a touchy subject and can go in many different directions.

Tuning overall is something that should be taken into consideration when making "changes" outside of the factory design.

What was the reasoning for using the GTi-R intake manifold? There are no benefits to be had over the stock manifold.

In a nutshell, it's the time it takes to charge the ignition coil in between fires. With a distributor type ignition, there's a charge delay between each pulse sent to the spark plug through the wire. This means you need to properly adjust dwell time when going with larger injectors, plugs, plug wires, or altering fuel pressure because your ignition dwell time can and will change. If you do not compensate, the ignitor will be forced to discharge before it has a chance to fully charge, which gives you less than optimum spark characteristics and then you don't have an optimum burn cycle in the combustion chamber.

This is why most people go with an aftermarket ignition system rather than actually fix the problem (which 80% of the time is related to ignition/injector tuning.)

Jamie's cars are proof that even stock distributors can handle more than what most people put to the wheels without issue.

May sound weird but i thought the GTiR Intake lined up with the vvl heads??

Why did you beg him? Whats the car used for?

Although I agree with most of your posts this is one I do not.