Adriano

From the sound of it, i doubt that vl is running 272deg cams, or a 600 hp turbo, more like 2x700hp turbos and massive cams. The reason rockabilities sound like it does, is because at the beginning of the power run it is already making heaps of torque, so you just dont hear it ramp up as much. Also the VL is free revving as opposed to a set ramp rate. Cars on dyno dont tend to sound very powerful as the only thing that changes as they rev up is exhaust/intake noise

Mate, who machined the head, they should be able to tell you, they can measure the thickess of the head and tell you how much it has been machined. (and its a good idea to post all your questions in the same thread, not starting another one )

Gary, you forgot the wheels in your calculation, 255/40ZRF20 fronts =712mm 285/35ZRF20 rears =708mm Difference is .56%

Or buy it from nengun, gressy make them

Fitting an O2 sensor too close to the turbo shouldn't damage it, some cars have them before the turbo

What ecu are you running, ive heard of haltechs having similar dramas

Is there a specific question

Hi, just wondering if anyone has an exploded diagram or any tips for disassembly. Im halfway through, and found the bearing closer to the head is siezed on.

Cant run less than actuator boost, 7 psi, i have found for best economy, rev out each gear a little bit, but dont load the motor, as this allow reasonable acceleration whilst staying in closed loop. Also try to roll on the accelerator gently,as this reduces the accel pump function.

All the drop in cams for rb25's retain the vct, poncams seem to best the most popular.

The studs come with instructions, i think its 85ft/lbs using the arp lubricant, or 110ft/lbs using 30wt oil

A lock bar replaces the steering rack, a hicas eliminator doesn't.

Engineering shop

If its running really rich, then its in the tune, not an AFM problem, although the rich tune can easily be reducing the power the car makes. I would have thought 250rwhp is about right for a stock turbo running .8 bar

Im pretty sure thay are the same, r33's come in 4wd also, tis just the bottom of the block thats different to accomodate it anyway.

Do you have a photo of the damage in the head, it could be that a sppark plug tip melted off, and bounces around in the chamber for a while causing the damage.

It might almost work, the AFM will read less voltage, which will reduce the inj output, which will offset the bigger injectors. That and the fact it will be in closed loop, so the fuel will trim itself. But i wouldn't

I wouldnt be surprised at all idf the stock turbo without bov makes 1.5 bar on liftoff/gearchange. The turbo can be flowing 100's cubic feet per minute, at a pressure ratio of 1.7, then the throttle is shut, and the 100's CFM has nowhere to go, the piping/intercooler act like a big pneumatic spring, with the pressure building right up, then the pressure waves bounce back off the throttle body and out through the turbo, then the process repeats itself, hence fully sic flutter

Hi, getting close to finishing my rb26/30 GTR, and hoping to get close to 450 rwkw, im looking into running a NISTUNE board, with a big AFM, however i think ill max out a Q45, and people seem to have a lot of mixed results with them, any advice?

Why dont you just have a look on the Microtech mand controller, and see whet the revlimit is?

That should pull a sailor off your sister.

Try pulling the inlet pipe off the turbo, and see of there is oil in the intake pipe b4 the turbo, could just be a bit of blowby, and you can check the turbo out for play whilst its off.

Thats what he is saying, the pressure spike inside the IC piping on gearchange is 1.9bar, hence the pressure on the closed throttle plate.

haha touche

Hmmm, seeing as we are all living on the same planet, fro arguements sake Kg is an effective measurement, as he was simply trying to determine a relative amount in perspective.