Guess my dyno numbers!
Thread Starter
Instructor
Joined: Mar 2011
Posts: 144
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From: Madison WI
Guess my dyno numbers!
The last time I went to the dyno my car put down 359/364 with a set of Kooks 1 7/8" headers and Bullet exhaust. I got a pretty nice Christmas bonus at work so I bought a set of PRC Stage 2.5 243s, 220/220 .581/.581 cam, FAST 102, and a Callway Honker. Anyone want to guess as to what my new numbers will be? Since I went with such a small cam I'm hoping to at least reach 400/400. I'm going to get it tuned this coming weekend, but I just wanted to get a feel for what I should expect.
Thread Starter
Instructor
Joined: Mar 2011
Posts: 144
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From: Madison WI
It's an auto. With just the headers and no tune it was 328/349 I think. I don't have a real baseline since the first dyno run was with the headers. I thought auto LS2s were around 325-340 stock? Oh well. It's all about the gains! Though it would be nice to hit 440/418 
.
I went with a small cam because I drive this thing all the time and it's already unpleasant enough with the bullets. Plus, I'm not a fan of the lopey exhaust and I didn't want to give up a bunch of torque on the low end.
. I went with a small cam because I drive this thing all the time and it's already unpleasant enough with the bullets. Plus, I'm not a fan of the lopey exhaust and I didn't want to give up a bunch of torque on the low end.
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Joined: Nov 2007
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From: Celina TX
Does that cam require a stall and are you putting an UDP on at the same time?
Staying with stock fuel injectors or bigger?
Should have a nice torque curve.
Bullets could easily be swapped out for something a bit more DD friendly.
Regards, Eric
Staying with stock fuel injectors or bigger?
Should have a nice torque curve.
Bullets could easily be swapped out for something a bit more DD friendly.
Regards, Eric
Last edited by EricT; Feb 7, 2012 at 01:10 AM.
Thread Starter
Instructor
Joined: Mar 2011
Posts: 144
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From: Madison WI
).
Burning Brakes
Joined: Sep 2009
Posts: 959
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From: Hartford CT
Base looks a little low. Best dyno numbers come from little details...
When you did your baseline numbers, were you on stock plugs, original drivetrain fluids, dirty air filter? How fresh was the oil change? Did you run a stock Tstat, how were your ECT and IAT temps?
If you address the above with the mods you mentioned I am guessing you will hit the 445/430mark. A nice setup, with a lot of midrange hit. No need for gears with that combo!
When you did your baseline numbers, were you on stock plugs, original drivetrain fluids, dirty air filter? How fresh was the oil change? Did you run a stock Tstat, how were your ECT and IAT temps?
If you address the above with the mods you mentioned I am guessing you will hit the 445/430mark. A nice setup, with a lot of midrange hit. No need for gears with that combo!
Thread Starter
Instructor
Joined: Mar 2011
Posts: 144
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From: Madison WI
Base looks a little low. Best dyno numbers come from little details...
When you did your baseline numbers, were you on stock plugs, original drivetrain fluids, dirty air filter? How fresh was the oil change? Did you run a stock Tstat, how were your ECT and IAT temps?
If you address the above with the mods you mentioned I am guessing you will hit the 445/430mark. A nice setup, with a lot of midrange hit. No need for gears with that combo!
When you did your baseline numbers, were you on stock plugs, original drivetrain fluids, dirty air filter? How fresh was the oil change? Did you run a stock Tstat, how were your ECT and IAT temps?
If you address the above with the mods you mentioned I am guessing you will hit the 445/430mark. A nice setup, with a lot of midrange hit. No need for gears with that combo!
It would be nice to hit 445/430, but I don't know if it will be that high. It does feel like it has a lot more torque now. Accelerating on the highway in 4th or 5th around 55 pulls a lot harder than before.
Burning Brakes
Joined: Sep 2009
Posts: 959
Likes: 3
From: Hartford CT
What do autos usually get with just headers? Everything was stock the last time and I had just changed the oil ~500 miles before I took it in. when I changed the heads I checked the gaps and most were spot on. It has a stock thermostat, but I'm thinking I may have the shop install a 160 when I get there. As for the temps, I don't know what they were.
It would be nice to hit 445/430, but I don't know if it will be that high. It does feel like it has a lot more torque now. Accelerating on the highway in 4th or 5th around 55 pulls a lot harder than before.
It would be nice to hit 445/430, but I don't know if it will be that high. It does feel like it has a lot more torque now. Accelerating on the highway in 4th or 5th around 55 pulls a lot harder than before.
Everything else still applies. The fresher the drive train fluids, the better. Also the thinner the better. Check your tire pressures. Your tuner should tell you if the computer is pulling timing because of iat or ect. I like the 160* t-stat because the temps stay more consistent.
Race Director
Joined: Mar 2007
Posts: 11,331
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From: Missouri City Texas
If you only gain 40rwhp from a cam, heads, FAST 102 and air intake I would burn the car to the ground.
You should gain a minimum of 70rwhp even with such a small cam.
My Auto LS2 made right under 400rwhp with K&N, Longtubes, Ported FAST 90, and an underdrive pulley.
It made 367 with Longtubes, K&N and tune, so your 359 with just tune and longtubes seems right on.
You should gain a minimum of 70rwhp even with such a small cam.
My Auto LS2 made right under 400rwhp with K&N, Longtubes, Ported FAST 90, and an underdrive pulley.
It made 367 with Longtubes, K&N and tune, so your 359 with just tune and longtubes seems right on.
Last edited by FloydSummerOf68; Feb 7, 2012 at 02:27 PM.
Thread Starter
Instructor
Joined: Mar 2011
Posts: 144
Likes: 0
From: Madison WI
If you only gain 40rwhp from a cam, heads, FAST 102 and air intake I would burn the car to the ground.
You should gain a minimum of 70rwhp even with such a small cam.
My Auto LS2 made right under 400rwhp with K&N, Longtubes, Ported FAST 90, and an underdrive pulley.
It made 367 with Longtubes, K&N and tune, so your 359 with just tune and longtubes seems right on.
You should gain a minimum of 70rwhp even with such a small cam.
My Auto LS2 made right under 400rwhp with K&N, Longtubes, Ported FAST 90, and an underdrive pulley.
It made 367 with Longtubes, K&N and tune, so your 359 with just tune and longtubes seems right on.