Cam Gear Alignment?

[DJRIFT]

hi all.

i have just recived a set of arospeed cam gears off the group buy. i am planing on putting them on soonish and my question is? if i put these on can i give them just a slight tweek. a few degres here and there without a dyno tune. from my understanding enough people already have rough guides as to how many degres they should be put. the results i have seen are all within 1 or 2 deg of each other so if i put (not sure which way it goes but) 2 deg on the inlet and 3 on the exhaust should i notice a difference and will it be ok?

any help would be grate. thanks damo

[rev210]

It depends on whether you have the headroom in timing and AFR maps. If you already have a good tune in place with AFR's in the 12's then I'd leave it till you get to a dyno. The change in cam timing can alter the AFR's at some point in the rev range.

If you had something to measure the AFR and knock you'd be ok to give it a red hot go.

[DJRIFT]

thanks mate i think ill leave it alone for now then.

[StockyMcStock]

the variations in cambelt tension and stretch over time are easily enough to throw your cam timing out by as much as 5 degrees when measured properly with a degree wheel and dial guage to measure the lift. for example, if you over tension the cam belt using the swinging tensioner bearing by a small amount it will totally muck up your "factory" cam timing.

moral of the story is, leave it on zero and install your belt, then run the engine for a while. after this, get someone who knows what they're doing to check your cam timing with a dial guage and degree plate the proper way. it will be way off the factory settings. you can play around with it on the dyno as much as you like once you know where you're actually starting from.

an engine simulator program will help you decide whereabouts to set the real cam timing if you can get your hands on one.