Horespower Numbers are Low
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 33
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From: Snellville Georgia
Horsepower Numbers are Low
I had heads/cam and exhaust installed on my 2002 coupe a month ago. We used a Comp cam and stock ported heads with FLP full exhaust. I gained 400.4 RWHP after the mods. I then installed LS1 Edit with 32lb injectors because the car was running lean. I only gained 8 more horespower by doing this. Do these numbers sound low?
[Modified by dustyhuff, 12:59 AM 10/8/2002]
[Modified by dustyhuff, 12:59 AM 10/8/2002]
Safety Car
Joined: Jan 2000
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From: Midlothian, VA
Re: Horsepower Numbers are Low (dustyhuff)
Man, I want your H/C if you gained 400.4 RWHP ontop of your stock setup ;)
It may need more tuning however, what are the cam specs and head flow #s?
It may need more tuning however, what are the cam specs and head flow #s?
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 33
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From: Snellville Georgia
Re: Horsepower Numbers are Low (C5Noir)
216 / 220 .525 / .532 114 lobe separation
I dont's know the specs on the heads. All I know is they are stock ported heads.
[Modified by dustyhuff, 1:13 AM 10/8/2002]
I dont's know the specs on the heads. All I know is they are stock ported heads.
[Modified by dustyhuff, 1:13 AM 10/8/2002]
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Joined: Jan 2000
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From: Midlothian, VA
Re: Horsepower Numbers are Low (dustyhuff)
That's a pretty tame cam. Low lift and duration is not aggressive. Get a more aggressive cam and you'll get about 10-20 more RWHP. I suggest the TR224 ;)
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 33
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From: Snellville Georgia
Re: Horsepower Numbers are Low (C5Noir)
I'm using the converters instead of the straight pipes. I've been told the straight pipes are good for an additional 10 RWHP. It's just to loud.
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Safety Car
Joined: Jan 2000
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From: Midlothian, VA
Re: Horsepower Numbers are Low (dustyhuff)
I'm sorry the cam specs are wrong, I don't no how to read!!
It's 269 / 273 .525 / .532 114
It's 269 / 273 .525 / .532 114
Thread Starter
Intermediate
Joined: Feb 2002
Posts: 33
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From: Snellville Georgia
Re: Horsepower Numbers are Low (C5Noir)
Atlanta Chassis Dyno did the install. The cam was recommended by the installer. He said it was the biggest cam he could install, and still pass emissions. He dynoed a stock car with the same FLP exhaust and there was an 9.2 RWHP difference in the cats vs no cats.
Melting Slicks
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From: Arlington TX
Re: Horsepower Numbers are Low (C5Noir)
269 / 273 .525 / .532 114
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From: Midlothian, VA
Re: Horsepower Numbers are Low (dustyhuff)
Atlanta Chassis Dyno did the install. The cam was recommended by the installer. He said it was the biggest cam he could install, and still pass emissions. He dynoed a stock car with the same FLP exhaust and there was an 9.2 RWHP difference in the cats vs no cats.
Does these thing lope like a ****? I don't see how it's possible you have those durations.
Drifting
Joined: Apr 2001
Posts: 1,763
Likes: 24
From: Austin TX
Re: Horsepower Numbers are Low (dustyhuff)
Both sets of numbers are probably correct.
In the non LT1 or LS1 world people talk about cams in both Advertised Duration, and Duration @ 0.050. Thats why the second set of numbers posted are so much wider than the first.
For example, my T1 cam from MTI is 280/280 advertised but only 221/221 @ 0.050.
For most purposes the 0.050 numbers are the ones you really care about.
Eric
In the non LT1 or LS1 world people talk about cams in both Advertised Duration, and Duration @ 0.050. Thats why the second set of numbers posted are so much wider than the first.
For example, my T1 cam from MTI is 280/280 advertised but only 221/221 @ 0.050.
For most purposes the 0.050 numbers are the ones you really care about.
Eric
Burning Brakes
Joined: Aug 2001
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Re: Horsepower Numbers are Low (dustyhuff)
I used to have that cam. Nothing compared to a B1 or T1. When I did that and the CNC heads, I picked up like 25 RWHP. Just after the install I had a 250 lb friend with me on the test run. The car felt the same before it went in.
Switched to the T1 and gained a LOT of power.
Switched to the T1 and gained a LOT of power.
Drifting
Joined: Apr 2001
Posts: 1,763
Likes: 24
From: Austin TX
Re: Horsepower Numbers are Low (dustyhuff)
I'm not very technical when it comes to cars my first # post might be correct. The car does shake a lot when idleing.
Eric
Thread Starter
Intermediate
Joined: Feb 2002
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From: Snellville Georgia
Re: Horsepower Numbers are Low (C5Noir)
I'm planning on installing an NOS kit in the future. I've already purchased the kit from a friend that was used but cheap. He had it on an 2002 SS Camaro for about two months. The jets were installed in the air box. What is the best way to install the jets on a corvette?
Drifting
Joined: Jul 2000
Posts: 1,818
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From: SoCal
Re: Horsepower Numbers are Low (dustyhuff)
As said above, he's quoting total duration numbers, not duration at 50 thousanths (like everybody else does). the 216/220 is what you want.
1) you using cats?
2) who's heads? the heads mean a lot. Bad heads = bad numbers. good heads = good numbers. specs, who ported them, flow numbers, etc all matter and you should know that kinda stuff
3) the cam is small, the lift is low. Go with a thunder racing 224 cam, or any other proven cam. You went small for good drivability, thats fine. Anything between 222-228 in duration with 550-570 lift on a 114 is probably about where you want to be
4) what RPM did your setup peak at?
5) automatic or manual tranny?
[Modified by jmX, 8:07 PM 10/7/2002]
1) you using cats?
2) who's heads? the heads mean a lot. Bad heads = bad numbers. good heads = good numbers. specs, who ported them, flow numbers, etc all matter and you should know that kinda stuff
3) the cam is small, the lift is low. Go with a thunder racing 224 cam, or any other proven cam. You went small for good drivability, thats fine. Anything between 222-228 in duration with 550-570 lift on a 114 is probably about where you want to be
4) what RPM did your setup peak at?
5) automatic or manual tranny?
[Modified by jmX, 8:07 PM 10/7/2002]
Melting Slicks
Joined: Jan 2002
Posts: 3,419
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From: Arlington TX
Re: Horsepower Numbers are Low (66ImpalaLT1)
I hope you meant does NOT shake a lot. A cam with 114 lobe seperation angle shouldnt really have idle problems.
Eric
Eric