Did a search but couldn't find what I was looking for. Is there an optimum procedure for degreeing cams on the dyno. I have Skunk2 Tuner 2's fitted on a B18C, should I start by adjusting the intake cam gear then exhaust or adjust them both at the same time in between runs etc? The car is mainly used for track use so low end power not really priority, thanks

 

s2t2 should be fine at 0/0 setting... (iirc)

but i wouldn't play with any cam settings unless you know what your v2v & p2v clearances are.

gl

 

Skunk2 give out -1 intake and +4.5 exhaust as quick settings. I adjusted mine to the peak figures Skunk2 gave me but can't remember what they came out at off the top of my head. I was more interested in the procedure to follow on the dyno

 

Without knowing other variables like V2V or V2P clearances, its just plain guess work, trial and error. The opportunity for destroying something is fairly high though doing it this way. That is why degreeing it with a proper tool to do so is the best method.

One of the other problems with adjusting cam gears on the dyno is that if you have a distributor on your INTake (or exh depending on motor) and you move the intake cam you must adjust base timing each time you move the INTake cam adv or ret...which is not as exact as it should be of course. Just too many variables to play with, while guessing.

 

I degreed them to the specs skunk2 gave me but just wondered if I could swing them a little to alter the powerband. I'm not using a distributor : )

 

Also which way adjusting the cam gears increases the risk of p2v contact i.e is +4 -4 much riskier than +4 -1 for example?

 

if you have properly degreed your cams with the measuring equipment it will tell you what is safe or not. Not every single motor is the same, so you will need the proper equipment to check your actual clearances. Then you will know what you can adjust on the dyno without any guessing. That is what everyone is trying to explain to you about degreeing your cams.

 

You need to do a lot more research if this is your question. Type in "how to degree camshafts" and then " how to find p2v and v2v clearance" into google and read all of the info you can stomach. It's no simple procedure

 

Absolutely. I googled up all the info and clayed my engine during assembly. Discovered that even at -5ex +5in the valves werent even entering the valve pockets in the pistons. Now I have to check to v2v on that head.

 

Hmm thanks guys, I thought tuner 2's were pretty safe for p2v clearance. I degreed the cams using the skunk2 peak lift method. I'm sure I ended up with +2 +1 but will check tonight.

 

I agree that checking clearances and degreeing in cams on a race motor is important, but for an average customer showing up to the dyno, with a few sets of decent sized cams thats been used by many others, to try out to see which works best for his/her setup, there are probably other options/guidelines to follow...

 

Just checked I'm at +1inlet, +2 exhaust if that helps at all. I asked around before I bought these cams and everyone said they'd be ok as they weren't too mad a profile, sure there must be loads of people using these no?

 

I use tuner 1's, albeit on an H22, but regardless, tuner 1's do not degree and simply set at 0,0 as a stock replacement. Tuner 2's are only slightly more aggressive, so you should be plenty good

 

how do you degree on the dyno, don't you need to mount a degree wheel

 

I think he means custom tweaking the cams for his setup on the dyno. I dont know why we're still commenting on this, 2nd poster Charlie Moua had the answer right off the bat

 

Sorry I'm just trying to gather as much info as I can, I degreed them to the specs Skunk2 gave me which ended up being +1,+2 on the cam gears and their quick settings are -1,+4.5.

 

+1,+4.5 (IN, EX) is safer if you are getting +1,+2 via degreeing

 

Was that meant to say -1,+4.5? The head skim usually means you have to advance the cam gears +1 on each from what I've read making it 0,+5. Thanks for the reply that's what I wanted to know : )

 

yes, meant to say -1,+4.5 per quick settings