Comp 216 220 Cam
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QUOTE: I have this cam, and with just longtubes, and ORP and a tune i made 351/352...not bad imo....i have no other boltons except lid.
Diamond 01ss...did you install the cam with the 4 degrees advance, or did you retard it? I'm thinking of having it retarded 4 degrees. I was told this would be best. Also, did you drive it at all without a tune? I will be getting it tuned, but was wondering how it would drive if I didn't get it tuned right away.
QUOTE: I have this cam, and with just longtubes, and ORP and a tune i made 351/352...not bad imo....i have no other boltons except lid.
Diamond 01ss...did you install the cam with the 4 degrees advance, or did you retard it? I'm thinking of having it retarded 4 degrees. I was told this would be best. Also, did you drive it at all without a tune? I will be getting it tuned, but was wondering how it would drive if I didn't get it tuned right away.
If you're paying $400-$500 for a good performance shop tune, I'd wait to make sure you don't change your mind about more exhaust/intake mods ... unless you have plenty of money OR unless you know someone who will tune it cheap who has a good reputation as a tuner. Of course a tune will make it faster and stronger. But, my point here is this: ... have known several folks who did the same thing you're doing and then decided they wanted more power. Though, your 2nd tune should cost you normally about half as much as your first one with the same performance shop.
Just make sure that stock manifolds or shorty's and exhaust ABSOLUTELY are what you want as your goal. I went with aftermarket shorty's because mine's a '99 and the stock manifolds don't flow very well as compared to later model LS1's. I ended up buying MAC's and doing headers twice ... depends on what your goals are and what your EPA laws are.
I KNEW I would be happy with my shorty setup, but, it didn't take long to realize I wanted more. Of course, with our cars, many of us always want more!!!!
If you're sure you want to keep your stock exhaust/shorty's, go for the tune and be happy. Good luck on whatever you decide. Just my .02 cents ... trying to help.
Anyway I was also wondering about the +4 advance. My understanding is its for the timing chain slop. Should put a new one on anyway and there will be no slop. Also the computer will give it all the advance it can handle anyway. (in most cases) My other thought is the more you make the computer adjust for the more problems your asking for. I got this cam for a daily driver when the weather is nice. Could be a year around car in the future. I would give up a few hp for a better driving or less picky car. Anyone???? This doesn't have anything to do with chain slop. When you speak of the computer giving advance, I think you are referring to ignition advance and not advancing the cam. Installing the cam 4 degrees advanced vs. straight up, will(for lack of better words)make everything happen sooner, creating an earlier and lower power peak. With the cam installed without any advance, you will make more peak power, although at a higher rpm.
Basically, I was wondering how taking away the advance and raising the peak power will effect the lower end of the power band. I bought this cam to put in my daily driver and don't want to effect the low and mid range power too much, but would also like to make good peak power. Sounds like this cam has worked out well for you guys, and I can't wait to put mine in
I'm just pissed that I live in california and can't get longtubes
I know...I know, I could, I just don't want to deal with it. Other common things I question along this line is running really cold and removing the EGR.
This cam may not be the biggest but has a flat, low torque curve. Best for drag racing naaaa but a good upgrade for smoking tires or scaring passengers yes.
I installed the cam 2 degrees retarded. That gave me 112 intake centerline with a 112 lobe separation angle. In other words "straight-up". Even retarded, the cam still gave a noticeable torque increase from right off idle. Trap speed increase by ~1mph.
Then I added the 1.85 rockers over both intake & exhaust valves and saw a solid 2 mph gain in my 1/4 trap. I went to the track last weekend and ran 12.6s@109-110 with 1.88-1.92 sixties. I was expecting 12.5s but for some reason my SES light came on during the first burnout and the car felt a little less peppy for the rest of the night. After I get the misfire figured out I'm hoping to hit 12.5s.

