new zzp cams anyone??
06-16-2010, 09:15 PM
#101
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you haven't done any back to back runs on a cam comparison have you?
same car, same mods, just the difference in cams? power band is what i am looking for, broad. i don't drag race my car, so a narrow band from 5k to 8k doesn't interest me. however, the lope does!
same car, same mods, just the difference in cams? power band is what i am looking for, broad. i don't drag race my car, so a narrow band from 5k to 8k doesn't interest me. however, the lope does!
06-16-2010, 10:40 PM
#103
Former Vendor
So stage 2 or less is recommended for daily driven applications then.
The easier the drive the better for me. I can sacrifice a little power knowing I won't be cussing and beating the car everytime it dies at the redlight/stop sign.
Obviously the stage 2 cams wouldn't work quite as well on a m62/nitrous set-up as the stage 3 cams, but surely they will still go hand-in-hand fairly well. Use the stage 2 cams for a moderate build utilizing the m62 with moderate (280-320 hp) power goals. 15-20 hp seems realistic to me using stage 2 cams with a ported/polished head, full and appropriate bolt ons, meth injection, and a return style fuel system.
I've also gathered that there will not be any need to use adjustable cam gears with these zzp cams, correct? The only parts needed would consist of a set of cams and 78 lb valve springs/retainers? The rest of the stock head assembly will still be usable and efficient?
If you have the information readily available, what would be the estimated rev limit with the stage 2 cams and 78 lb springs? Ralliartist said 3000k-7500k would be the ideal powerband for stage 2 cams. Would you agree?
EDIT:
My apologies for the battery of questions. I'm just trying to think of questions that other members may have or haven't thought of yet, and for my own sake as well. Information purposes, if you will.
The easier the drive the better for me. I can sacrifice a little power knowing I won't be cussing and beating the car everytime it dies at the redlight/stop sign.
Obviously the stage 2 cams wouldn't work quite as well on a m62/nitrous set-up as the stage 3 cams, but surely they will still go hand-in-hand fairly well. Use the stage 2 cams for a moderate build utilizing the m62 with moderate (280-320 hp) power goals. 15-20 hp seems realistic to me using stage 2 cams with a ported/polished head, full and appropriate bolt ons, meth injection, and a return style fuel system.
I've also gathered that there will not be any need to use adjustable cam gears with these zzp cams, correct? The only parts needed would consist of a set of cams and 78 lb valve springs/retainers? The rest of the stock head assembly will still be usable and efficient?
If you have the information readily available, what would be the estimated rev limit with the stage 2 cams and 78 lb springs? Ralliartist said 3000k-7500k would be the ideal powerband for stage 2 cams. Would you agree?
EDIT:
My apologies for the battery of questions. I'm just trying to think of questions that other members may have or haven't thought of yet, and for my own sake as well. Information purposes, if you will.
Stage 2 shift points would be close to 8k.
Only with timing changes on the same cams or stock vs. aftermarket cams. We still plan to make some tweaks to optimize for different applications. I know there are more gains to be had.
Last edited by Matt M; 06-16-2010 at 10:40 PM. Reason: Automerged Doublepost
06-17-2010, 05:40 AM
#109
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Someone trying to get all of the power they can out of the M62/nitrous would benefit from the S3 cams.
I don't think I would enjoy daily driving a Cobalt with stage 3 cams. The sacrifices would be pretty extensive. Then again, I put up with a lot more negatives in order to have a faster car when I was younger. Everyones opinion will vary.
I don't think I would enjoy daily driving a Cobalt with stage 3 cams. The sacrifices would be pretty extensive. Then again, I put up with a lot more negatives in order to have a faster car when I was younger. Everyones opinion will vary.
06-21-2010, 05:57 PM
#114
Former Vendor
I've been digging up a lot of old dyno charts, but I don't have ideal tests that I'd like to post for some of the setups. Our S2 cam test had a peak gain of 26whp over the stock cams. However, the cam timing wasn't the same as we run now. On that test, there was no gain below 4500 RPM and a ~30whp gain at 7500 RPM. The average gain was about 12whp. We have since started timing the cams a bit different to pick up more midrange, but I don't have an A-B-C comparison. On the stage 3s, we picked up about 6whp through the mid-range and lost nothing up high by re-timing the cams. We could probably move them a little more and pick up a few more through the middle, but likely at the expense of some top end hp.
06-21-2010, 08:00 PM
#116
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I've been digging up a lot of old dyno charts, but I don't have ideal tests that I'd like to post for some of the setups. Our S2 cam test had a peak gain of 26whp over the stock cams. However, the cam timing wasn't the same as we run now. On that test, there was no gain below 4500 RPM and a ~30whp gain at 7500 RPM. The average gain was about 12whp. We have since started timing the cams a bit different to pick up more midrange, but I don't have an A-B-C comparison. On the stage 3s, we picked up about 6whp through the mid-range and lost nothing up high by re-timing the cams. We could probably move them a little more and pick up a few more through the middle, but likely at the expense of some top end hp.
I do have one more question though, what modifications were done to the test car? Was it just bolt ons?
06-21-2010, 08:52 PM
#117
x2 on the appreciation Matt and ZZP. It will be great to have a good cam worth purchasing! I'm figuring that I will wait to buy them some more to see if you can improve midrange power any. If/When R&D is finished, I will definitely be snagging up a set.
lol
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