intermediate headers just as good as long tubes
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Joined: Oct 1999
Posts: 320
From: Crowded SW Florida
Sort of OT- I miss Jeff Smith...
Chevy High Performance has gone downhill since Jeff left. It is hard to understand some of the stuff the new guy writes. I bought a subscription to Car Craft (where Jeff is now the Editor and apparently writes like 75% of the articles) for this reason.
Back on topic...
I referenced the same CHP header article in this thread . I was interested in this article because my 383 has 9:1 compression (due to planning for a blower), and my car is lowered, so I was concerned about the LT headers regarding ground clearance. I'm still waiting to read some real world stories with the Pacesetters.
Back on topic...
I referenced the same CHP header article in this thread . I was interested in this article because my 383 has 9:1 compression (due to planning for a blower), and my car is lowered, so I was concerned about the LT headers regarding ground clearance. I'm still waiting to read some real world stories with the Pacesetters.
Thread Starter
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Joined: Aug 2003
Posts: 420
From: brunswick ohio, small burb south of cleveland
live 4 i read your thead and was amazed. those shorty numbers for average under the curve were right there and no one even mentioned it the entire rest of the thread. sometimes i think people just want to get there post on here somewhere and dont even read what its about. 
david
david
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Joined: Dec 2003
Posts: 2,724
From: Oklahoma where trees are made of wood.
Originally posted by dren70
jason here are the averages.
the purpose of the post was to dispell the RUMOR that long tubes are so much better than intermediate or even shorties. the only concrete shorty info i can give will be my dyno when the heads are completed. as for the intermediate the averages were minimally different. unless you need to tap every single ounce of power like 383Z4ME in his drag car you can do quite well with a solution other than long tubes. i would prefer 10 lbs of torque out of the hole instead of 20 HP at the top.
WS Sick i checked out the link.
The comparison test pitted the stock cast-iron exhaust manifolds against a set of 1-5/8-inch Hooker headers that were plumbed into the same 2-½-inch exhaust system
i am not sure how this applies to this post. no one would disagree that anything is better than stock.
david
jason here are the averages.
the purpose of the post was to dispell the RUMOR that long tubes are so much better than intermediate or even shorties. the only concrete shorty info i can give will be my dyno when the heads are completed. as for the intermediate the averages were minimally different. unless you need to tap every single ounce of power like 383Z4ME in his drag car you can do quite well with a solution other than long tubes. i would prefer 10 lbs of torque out of the hole instead of 20 HP at the top.
WS Sick i checked out the link.
The comparison test pitted the stock cast-iron exhaust manifolds against a set of 1-5/8-inch Hooker headers that were plumbed into the same 2-½-inch exhaust system
i am not sure how this applies to this post. no one would disagree that anything is better than stock.
david
A blanket statement saying that this sucks and this is the best only applies to the test engine used and the purposed stated.
Saying that this header is better just because it performed better on a moter (which is completly different by the way than what your engine would require) is putting blinders on your head.
If the motor only needs 1 5/8s then they will be fine but there is a point that the 1 5/8s will not do well.
if your goal is different then mine they do we not have to take different approaches to acheive our goals.
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Joined: Aug 2003
Posts: 420
From: brunswick ohio, small burb south of cleveland
if you would change cams to complement the larger headers , increase compression then which do you think would perform better.
A blanket statement saying that this sucks and this is the best only applies to the test engine used and the purposed stated.
maybe i am talking apples and you are talking oranges.
david
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Joined: Dec 2003
Posts: 2,724
From: Oklahoma where trees are made of wood.
David, I know you didnt say anything sucked as per this subject, but what my point is , is that the test was good for that combo, if you have something different than what they have then the results of course will be different, in some cases the intermediate and or shorter length headers will compare, but when the bar is raised so will the seperation between the two.
If your LT is going to do 90 percent commute driving and 0 percent track time then you have to decide if you can live with the longtubes, or go shorties and see a gain, but lose a few at the track.
If your LT is going to do 90 percent commute driving and 0 percent track time then you have to decide if you can live with the longtubes, or go shorties and see a gain, but lose a few at the track.
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Joined: Oct 1999
Posts: 320
From: Crowded SW Florida
Originally posted by simple
sorry off topic but "Live for TA's" i like your next project listed in your sig man
2 words..... DO IT!
sorry off topic but "Live for TA's" i like your next project listed in your sig man
2 words..... DO IT!
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