My Custom Gt28 Turbo

[jmac]

Iridiums gapped to 0.8mm as far as I know. Won't be able to confirm until my mechanic re-opens in the New Year though.

[jmac]

Fixed the problem, for now. Z32 AFM in, no dramas, and the Boost Control Kit holds boost great, once we got the wiring right!

Plugs were gapped to starndard (?1.1mm), now down to 0.8. Also looks like coil no 6 had a strange "stain" on it, not really evidence of bad arcing but it looked different to the others. No evidence of hairline cracks etc.

So we moved it from cyl 6 to cyl 1, after slathering it in Araldite.

Also have left the coil cover off but put the top plastic engine cover back on, in the hope of getting a little more air flow around them. No more misfire since then but I'm expecting it return at some point.

After another retune last night we picked up another 35hp and 50lb-ft of torque! (that's 26kw and 68Nm). Thanks to Greg for the dyno and Rob the Apexi guru from Chiptorque for helping! Drives like a dream now, if anything feels more linear and transitions into boost both quicker and smoother.

Gotta get it onto a Dyno Dynamics for a final set of numbers but I'm guessing something like 235-240rwkw, at 1.1bar.

[Dale FZ1]

That's just great!!

Post up your results please.

cheers

Dale

[jmac]

Here are the dyno printouts.

It should be noted this was an older dyno (not a Dyno Dynamics) which reads horsepower in shetlands, not clydesdales!

The "before" result from this dyno (about 225 rwhp) was exactly the same tune that gave 226.5rwkw on a Dyno Dynamics dyno, so that's why I'm guessing we've picked up a fair bit more. What impresses me though is the stupendous midrandge I now have and how much nicer the transition onto boost is.

They took it for some street tuning and Greg apparently now wants one!!!

What was also interesting on the "before" result was that two consecutive power runs were quite different - the opinion was that this was due to the tune somehow not allowing enough heat to dissipate out of the engine.

We did some consecutive runs after the retune and the graphs plotted almost identically, which is apparently rare for a turbo car as there is usually a 3-5hp difference each run.

[Muz]

Hi jmac,

I'm still following this thread as I am yet to be convinced that a GCG hiflow is the way to go. No offence to Bass and ABO-Bob Starting to lean more towards what you have done. Can't wait to see that DD graphs.

Cheers

Muz

Edited February 4, 2006 by Muz