HKS adjustable Exhaust Gear

[rev210]

The base timing was adjusted too.

Made zero difference.

Cost me $600 to get nothing!!

So what was your base timing before and after? Did you alter the timing and fuel map (assuming you have a power FC or a S-afc in the case of fuel alterations only)

You can't expect nothing at all to happen as a result of a significant change in cam timing. Other things happen when cam timing is changed that make alterations to fuel and ignition necessary.

Did you try advanced and retarded settings?

I assume you still have the gear on mate?

Maybe we can get to the bottom of this

[Bass Junky]

rev.

At the time, I had no means of adusting the fuel or anything.

It was put up on the dyno, power run done, old gear removed, new gear fitted, adjustments made to cam gear and base timing, and then spun up on the dyno again.

No difference. three of four adjustments made again, and still no difference.

See this thread for details.

http://www.skylinesaustralia.com/forums/sh...ead.php?t=33462

The guy who fitted the gear now runs his own shop and actually tuned the PFC on my car recently. He remembers my car from the cam gear fitting and found it strange that the R34 showed no results.

I think some others have also tried this with the R34 and had similar results.

We think is has a lot to do with the constantly variable intake cam timing.

[Fly_With_Sky]

thats some good increases you got there benm from the exhuast gear and coil packs. Looks like these may be the next 2 mods i will have to do when the modding bug bites again as they seem very good value for money.

Jsut curious however, when sydney kid claims he has never seen any less than 15rwkw gain (which is very impressive considering the small cost) is that with any aftermarket management?

[Col-GTSX]

Let me just state before anyone runs out and buys one.

This is a fairly easy item to fit, but to set it up correctlly you need some help. Dont attempt to set this up on a trial and error basis or pistons will meet your valves.

I have found some info that says start at 4 deg's... Drive and watch knock sensor readings on PFC. Then adjust 1 deg at a time til you finally see the knck change then step it back 1 degree and tighten it down as hard as possible. Also mark with a pen so you can check for slipping at a simple glance.

Ill let you guys know the power gain. Im trying to get a dyno so we can run it in the morning then fit and run again. Give you guys an exact result and a simple guide on where to start. All info i have found said dont do it unless you can monitor knock sensors as this is your key indicator for limits.

Cheers Col

[R31Nismoid]

col - can you do a before/after comparison and make a new thread?

just to gain more info for all of us.

thanks - ash

[Col-GTSX]

Thats the plan stan... i mean R31 Nis

[R31Nismoid]

awesome work.

[benm]

My 'before/after' review is here