l67 to tune or not to tune?

[vn50L]

Hey boys.

Recently acquired a vt series 2 XU6. Has some mild mods: 82mm pulley, 1.90 rockers, hsv extractors and exhaust (standard i think) 3.46 diff ratio and a shift kit. I'm not overly happy with its performance atm. Thing feels sluggish. I got the diff gearing and shift kit done to try and solve it and, its better, but still sluggish. Seems to plow through juice as well.

With such limited mods, would a good tune help solve my problems? If so, where in Melbourne could i find somebody worth having a talk to about it who wont rip me off?

Would love some decent advice.

Pete.

[wamboin23]

possibly because of the 82mm pulley.

may be pulling timing because too much boost. 87mm is the smallest recommended pulley with out a dyno run etc. to check a/f ratios and knock.

possibly try switching to a 87mm is you have a modular hub setup.

[shaune_m]

Yep, that pulley is too small to run without at least a insulator or mini cooler. Have a chat to Grant at Custom Tuning Services in Cheltenham. Honest advice and well priced as well. He tuned my L67 to a bit over 220rwkws

[chargedvx6]

pm sent.........

[GTS69]

as has been said to much boost you would be getting knock and that will cause it to retard the timing and reduce power but at the end of the day your at the point you need to look at cooling it and then running a bit more boost if the thing that you have done dont make you happy a tune wont fix that it will only give you 5-10kw if your lucky

[monkeys437]

98 octane fuel is also a must if you don't already know. Ive got an 87mm pulley I was forced to use 91 octane for a return trip once when I went camping. The trip up was 9l/100ks and the return trip was 12l/100ks and the car was sluggish, struggled up hills and made all sorts of concerning noises

[vn50L]

thanks for your help guys.

Yeah looking at getting a cooler now. Tossing up whether or not to go FMIC for the awesomeness factor, or be dull and go W2A. People keep warning me about FMIC's on these needing to be tuned regularly, but nobody seems to know why??? surely there are ways to avoid this??

If anyone has used either FMIC or W2A, or both let me know your thoughts.

Pete.

[wamboin23]

I've never heard of A2A systems needing to be tuned regularly, but the car won't be overly driveable before a tune.