I Bought Adj. Cam Gears...do I Need To Retune Everytime?

[nsta]

Hey guys, ive just had some cam gears installed for my rb26 motor....i hear theyre good upgrade for response....do i need to retune after each cam gear adj?...is there a base setting to go by for a definitive kick in response?

Thanks

[Beer Baron]

hi mate, you may need a little tuning of the power fc done when you get the gears adjusted. yes there is a kind of 'start point' that most tuners will go to and then test a few changes either side of that point. for best result get them adjusted on the dyno. most gtr tuners in nsw know what to do. i had mine done at uas a few years back and I was happy with the job. took less than 2 hours inc all the mucking around adjusting them, and the dyno runs and tuning. cost a few hundred bucks, and netted about 20kw up top and about 30 in the mid range. some tuners will tell you cam gears are a waste of time with standard cams and turbos. my advice is agree with them, then just go somewhere else. they may not do much on other engines, but a stock RB26 with the basic boost up, exhaust, power FC mods will benefit from cam gear adjustment. for 26s you are generally looking to retard the exhaust and advance the inlet. as to how much every car is different, but like I said each tuner will have their favoured sweet spot to start from.

case in point:

PS: there are dozens of threads on this in FI. it's been covered many, many times.

[Beer Baron]

and it ended up like this, with the same set-up just a bit more tuning.