Is this decent HP for headers only?
Thread Starter
Instructor
Joined: May 2003
Posts: 167
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From: Irvine CA
Is this decent HP for headers only?
I have a 2001 LS1 with the the LGM long-tube headers set up (3" collectors, X-pipe, etc) and triflow exhaust. Also LS1 dyno tune. All else is stock. I have had a dyno on two separate dynojets reading 318/339 and 320/340. Is this decent HP/TQ for these mods? I really felt the low end TQ increase with the LG's but it seems a little low overall. So many threads say 400 RWHP is easy with the addition of heads and mild/moderate cam, but I can't see the additional 80 HP from head/cam. Friend of mine has head/cam/headers and only achieved 385 RWHP. It would be really depressing if you can't get 400 with addition of head/cam? :confused:
Drifting
Joined: Aug 2003
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From: Ventura, CA Fight On Forever
St. Jude Donor '03-'04-'05
Re: Is this decent HP for headers only? (MagRed01Atty)
I think you'll get the 400 hp with the right H/C package. I've been told that the AFR Heads are the way to go, so I'm waiting for them. They should be plentiful by early summer. Are you an A4 or M6? the hp will be easier to get with the M6 than the A4, which I have. Air intake needs to be upgraded as well. I'm hoping to get to 400 hp with a pretty mild cam, something around 220/220. Good Luck!
mtv
mtv
Drifting
Joined: Aug 2003
Posts: 1,751
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From: Ventura, CA Fight On Forever
St. Jude Donor '03-'04-'05
Re: Is this decent HP for headers only? (MagRed01Atty)
Red,
As I recall, Andy did your tune and as far as I'm concerned, he's the man in this neighborhood. He did my work before he had the dyno, so I really don't what my real hp is. But I'm pretty happy with the performance for now until the AFRs come out. Andy has a waiting list w/o obligation for installation. If you're interested in a H/C package, I'd get on his list and just decline if you change your mind. I'm 7th on his list :D
I was also hot on an LSX intake manifold until I found out that all 2001 LS1 engines and after have the LS6 intake manifold. It appears that the gain over an LS6 manifold is minor. But that will change when the 90mm throtle bodies come in a month or two. That will get you over the 400 hp line if the H/C package doesn't do it alone. Beware of a very aggressive Cam, you idle will be rough and the engine will lobe (sound irregular).
mtv
As I recall, Andy did your tune and as far as I'm concerned, he's the man in this neighborhood. He did my work before he had the dyno, so I really don't what my real hp is. But I'm pretty happy with the performance for now until the AFRs come out. Andy has a waiting list w/o obligation for installation. If you're interested in a H/C package, I'd get on his list and just decline if you change your mind. I'm 7th on his list :D
I was also hot on an LSX intake manifold until I found out that all 2001 LS1 engines and after have the LS6 intake manifold. It appears that the gain over an LS6 manifold is minor. But that will change when the 90mm throtle bodies come in a month or two. That will get you over the 400 hp line if the H/C package doesn't do it alone. Beware of a very aggressive Cam, you idle will be rough and the engine will lobe (sound irregular).
mtv
Burning Brakes
Joined: Aug 2000
Posts: 889
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From: DFW tx
Re: Is this decent HP for headers only? (LT1LS1)
You need to get an intake to take full advantage of your headers. The stock airbox is very restrictive.
I made 337 rwhp and 351 rwtq with TPIS headers, x-pipe, corsa exhaust, and the vortex intake. With an intake, you should be over my numbers.
I made 337 rwhp and 351 rwtq with TPIS headers, x-pipe, corsa exhaust, and the vortex intake. With an intake, you should be over my numbers.
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Instructor
Joined: Aug 2003
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From: Batesville AR
Re: Is this decent HP for headers only? (MagRed01Atty)
I have an 02 A4 with the same LG LT's, 3" X and down pipes, modified stock air box and Borla stingers added today. Had it dyno tuned in Fla two weeks ago...it was running very rich!!!
Base was 310hp..320 torque. After 6 pulls with minor tuning to correct overichness. 330hp..and 350 torque. The tuner said I may be losing 5-10 hp from the airbox and another 10-15 from the stock mufflers that I had on.
Base was 310hp..320 torque. After 6 pulls with minor tuning to correct overichness. 330hp..and 350 torque. The tuner said I may be losing 5-10 hp from the airbox and another 10-15 from the stock mufflers that I had on.
Drifting
Joined: Aug 2002
Posts: 1,538
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From: Central MO
Re: Is this decent HP for headers only? (MagRed01Atty)
I have the stainless works headers and a blackwing with a Predator tune and have about 330 rwhp and 340 tq. You seem to be within the normal range. Dont sweat the numbers just enjoy the ride! :rolleyes:
Safety Car
Joined: Oct 2000
Posts: 4,949
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From: Monticello MN
Re: Is this decent HP for headers only? (Jeff Jeff)
You need to get an intake to take full advantage of your headers. The stock airbox is very restrictive.
I made 337 rwhp and 351 rwtq with TPIS headers, x-pipe, corsa exhaust, and the vortex intake. With an intake, you should be over my numbers.
I made 337 rwhp and 351 rwtq with TPIS headers, x-pipe, corsa exhaust, and the vortex intake. With an intake, you should be over my numbers.
Ed
Melting Slicks
Joined: Aug 2002
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From: Lutz FL
Re: Is this decent HP for headers only? (MagRed01Atty)
Mine is a M6. What do you think about my current numbers? Low?
[Modified by Automag928, 11:57 AM 2/11/2004]
Racer
Joined: May 2001
Posts: 304
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From: Bryn Mawr PA
Re: Is this decent HP for headers only? (MagRed01Atty)
I think you are a little low. My 99 FRC with only a Blackwing pulled 326hp/330torque after a little tuning with the MAFT. (Started at 312hp) Fuel was too fat but by leaning conservatively, 326 was peak with great overall driveability.
Team Owner
Joined: Oct 2000
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St. Jude Donor '03-'04
Cruise-In 1-2-3-4-5 Veteran
Re: Is this decent HP for headers only? (jmzvet)
Needs something...
My 1999 FRC pulled 311 hp and 317 tq with no mods, stock airbox and paper filter, when she hit 52,000 miles.
I've been wondering...it's not actually possible to get about 55 more rwhp with just bolt ons, is it? Including remaining completely smog-legal?
My 1999 FRC pulled 311 hp and 317 tq with no mods, stock airbox and paper filter, when she hit 52,000 miles.
I've been wondering...it's not actually possible to get about 55 more rwhp with just bolt ons, is it? Including remaining completely smog-legal?
Drifting
Joined: May 2003
Posts: 1,715
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From: cAshburn VA
Re: Is this decent HP for headers only? (MagRed01Atty)
I agree that an better air intake, even just a K&N would up that easily. With a really good one, and a head/cam job there is no reason you can't top 400rwhp. Look at my mods below, and my SAE corrected rwhp is more like 381rwhp. That is with just the usual bolt-ons, stock LS6 heads, higher ratio rockers and tuning. Am in the middle of putting a mild cam in, and hoping that will get me over the 400rwhp hump. Doing an underdrive pulley while I am down there just in case I need just a few more horses.
Drop a good airbox in, pull the MAF screen and you should be 335-340 easy, and a good head/cam package should put you over the top. Good luck! :thumbs:
Drop a good airbox in, pull the MAF screen and you should be 335-340 easy, and a good head/cam package should put you over the top. Good luck! :thumbs: