[Z06] hp issues
Thread Starter
Racer
Joined: Sep 2009
Posts: 260
Likes: 0
From: elgin il.
hp issues
i have an 02 z, with varam intake, kooks LT headers, cam and b&b bullet. just put the cam in to get more hp, but was a little disapointed with the outcome. dont have my dyno sheet in front of me so #'s might not b to accurate. with just headers intake exhaust, i had 300ish hp at around 2500 rpm with the torque right there with it, and both climbed to about 5500 rpm then dropped off. i put the cam in and i dont have **** till about 4500, or 5000. how do i get that power on the low end again.
Advanced
Joined: Apr 2010
Posts: 51
Likes: 6
From: Carrollton, Texas
i have an 02 z, with varam intake, kooks LT headers, cam and b&b bullet. just put the cam in to get more hp, but was a little disapointed with the outcome. dont have my dyno sheet in front of me so #'s might not b to accurate. with just headers intake exhaust, i had 300ish hp at around 2500 rpm with the torque right there with it, and both climbed to about 5500 rpm then dropped off. i put the cam in and i dont have **** till about 4500, or 5000. how do i get that power on the low end again.
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Joined: Apr 2010
Posts: 51
Likes: 6
From: Carrollton, Texas
Someone correct me if I'm wrong, but doesn't a 112 LSA move the torque higher up the RPM range and 114-116 will move it into the lower RPM range? That could be some of your problem. It would really be interesting to see your dyno sheets of before/after to see just how much the difference is on the low end.
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Racer
Joined: Dec 2007
Posts: 450
Likes: 9
From: SOUTH NJ
Sounds like your problem is in your tune, Had the same problem w/my 04 GTO after cam change. First tuner I went to seemed to only be able to tune the car for WOT. Car seemed to have no timing advance below 4500rpms. I grew up tuning Carb/Dist engines, so I know what an engine needs. The 2nd Tuner I went to said thats exactly whats wrong, few runs on the dyno and more timing, the car was running like a raped ape from idle to 6300 rpms. The car even sounded better, exhaust note had a nice mean roar, not a dull thunder like the first tune.
My 2-cents, its in the tune
My 2-cents, its in the tune
Thread Starter
Racer
Joined: Sep 2009
Posts: 260
Likes: 0
From: elgin il.
heres the dyno the old was with intake headers exhaust, then the new obviously with the cam. this might be normal, just wanted to what u guys thought. 
Last edited by RubenTrinidadz06; Jul 1, 2010 at 09:02 AM.
Race Director
Joined: Sep 2005
Posts: 11,060
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From: Pasco WA
If I'm reading your graph correctly, with the addition of the cam, the TQ line runs almost parallel to the HP line, and doesn't peak until 6k. This is really off, and though your TQ peak is listed as 400, no where on the graph do a line cross the 400 level, except for the HP (I assume) line. I need clarification.
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Joined: Apr 2010
Posts: 51
Likes: 6
From: Carrollton, Texas
To me that looks like you gained a bit of power all around with the new cam and you didn't lose anything.
Thread Starter
Racer
Joined: Sep 2009
Posts: 260
Likes: 0
From: elgin il.
i dont think so, because at the bottom of the page it shows a runfile one is lighter then the other. and if u look at the dates it kinda makes sense. the lighter 1 is the older one. i was just wondering if a diferent tune could change anything? i like the low end power. if i cant change anything, where do i go from here. not realy ready for a blower.