Dyno Results: Stage 1 vs. Stage 0 Mail In Xflash
Thread Starter
Evolving Member
Joined: Apr 2004
Posts: 122
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Shiv,
I set the cam gears back to zero. Full boost at 3500rpm. I didn't go to the dyno yet but my boost gauge indicates full boost 3500rpm 3rd gear and 3100rpm in 4th gear. Now what do I do????
Superhatch, you were right!
I set the cam gears back to zero. Full boost at 3500rpm. I didn't go to the dyno yet but my boost gauge indicates full boost 3500rpm 3rd gear and 3100rpm in 4th gear. Now what do I do????
Superhatch, you were right!
Yeah, and if you went +X/+X you'd get boost even sooner.
The key to this puzzle that you're missing is that you're going to lose significant top end by setting your cam gears at 0/0. You've essentially made your car into a stage 0+ car instead of a stage 1 car.
Cam gears are tools used to shift a torque band around in the RPM range, they can't make more torque. However, by shifting your cars peak torque up in the RPM range you end up with more power, since power is a function of torque and RPM.
Cams increase torque generation and also shift the torque generation to a different RPM. Longer duration cams make power at higher RPMs since long duration cams have high overlap and overlap generally makes high RPM power.
The benefit of a stage 1+ car is the addition of cams gives you the top end pull of the gears without the tradeoff in spool. The really nice thing about running long duration cams with gears is that you can actually run a + setting on the gears to increase low end, but the long duration of the cams helps top end power increase too! Ted B already experimented with this and saw massive low end gains with no sacrifice in top end pull. (He is running HKS 280's at +2/0)
- Steve
The key to this puzzle that you're missing is that you're going to lose significant top end by setting your cam gears at 0/0. You've essentially made your car into a stage 0+ car instead of a stage 1 car.
Cam gears are tools used to shift a torque band around in the RPM range, they can't make more torque. However, by shifting your cars peak torque up in the RPM range you end up with more power, since power is a function of torque and RPM.
Cams increase torque generation and also shift the torque generation to a different RPM. Longer duration cams make power at higher RPMs since long duration cams have high overlap and overlap generally makes high RPM power.
The benefit of a stage 1+ car is the addition of cams gives you the top end pull of the gears without the tradeoff in spool. The really nice thing about running long duration cams with gears is that you can actually run a + setting on the gears to increase low end, but the long duration of the cams helps top end power increase too! Ted B already experimented with this and saw massive low end gains with no sacrifice in top end pull. (He is running HKS 280's at +2/0)
- Steve
Thread Starter
Evolving Member
Joined: Apr 2004
Posts: 122
Likes: 0
Superhatch,
I now understand what you are saying with the cam gears shifting the powerband up for power and slowing spool up. I got the impression that it was not normal to lose spool up with a Stage 1 car. Maybe my car is different. At least I know that now and can set my cam gears back to -5 and have peace of mind that nothing is wrong with my car.
Thanks for your help!
I now understand what you are saying with the cam gears shifting the powerband up for power and slowing spool up. I got the impression that it was not normal to lose spool up with a Stage 1 car. Maybe my car is different. At least I know that now and can set my cam gears back to -5 and have peace of mind that nothing is wrong with my car.
Thanks for your help!