THE HEADER SIZE DEBATE WILL BE SETTLED ONCE AND FOR ALL

[Russell James]

Originally Posted by litle88

Explain to me why you guys prefer not to tune a 1 7/8 or EVEN a 2 in primary long tube headers? As long as the AFR is the same throughout the test with all the headers then its fair. Not tuning a 2in primary and getting AFR reading at the tailpipe will not be accurate enough for a REAL test.

I think it's just to keep things consistent and leave out any other variables for someone to debate affected the outcome.

I think it will be nice to know - On the stock tune, these 3 different header pipe sizes did - this, this and this - draw your own conclusions.

Looking forward to the results

[mbacamaross]

:popc orn:: popcorn::popco rn::p opcorn::popcor n::po pcorn::popcorn ::pop corn: :popc orn:

[lee]

i might have missed it but has there been a date set or is ted still waiting to see which header companys jump on board ?

[DCv2]

[Total_Perf_Eng]

Unfortunately, the great header debate will always be a debate.. By keeping the stock catback, there will be a huge group of guys that say whats the point in uncorking the headers only to re-cork at the catback. Then, there will be guys who say without proper tuning, the results are severly skewed. No matteer what, there will always be a majority group that disagrees with some part of the test.

Me personally.... At least it will give a decent trend to work from. If one specific header is more powerfull, chances are, when tuned or uncorked, the percentege of difference will be somewhere around the same.

Th 2" will be at a huge disadvantage though. I personally run those on my blown 443. I would never do that on a stock displacement.

My vote is 1 3/4 will make more average torque, 1 7/8 will make more peak power, and the 2" will show little, if anything over the 1 7/8"

But the winner will be 1 3/4..

Subscribed...

[COBRA CAMANDER]

Ted, can you test with a tune to see which one can be tuned to get the most HP also? Sorry if this has been asked before, but what size cats and cat back is being used on the test?

[PieNsky]

Originally Posted by Total_Perf_Eng

Unfortunately, the great header debate will always be a debate.. By keeping the stock catback, there will be a huge group of guys that say whats the point in uncorking the headers only to re-cork at the catback. Then, there will be guys who say without proper tuning, the results are severly skewed. No matteer what, there will always be a majority group that disagrees with some part of the test.

Me personally.... At least it will give a decent trend to work from. If one specific header is more powerfull, chances are, when tuned or uncorked, the percentege of difference will be somewhere around the same.

Th 2" will be at a huge disadvantage though. I personally run those on my blown 443. I would never do that on a stock displacement.

My vote is 1 3/4 will make more average torque, 1 7/8 will make more peak power, and the 2" will show little, if anything over the 1 7/8"

But the winner will be 1 3/4..

Subscribed...

Well you could always counter and tell them that the guys who dynoed their cars with the cutouts showed little to no added HP?

[JANNETTYRACING]

Originally Posted by Total_Perf_Eng

Unfortunately, the great header debate will always be a debate.. By keeping the stock catback, there will be a huge group of guys that say whats the point in uncorking the headers only to re-cork at the catback. Then, there will be guys who say without proper tuning, the results are severly skewed. No matteer what, there will always be a majority group that disagrees with some part of the test.

Me personally.... At least it will give a decent trend to work from. If one specific header is more powerfull, chances are, when tuned or uncorked, the percentege of difference will be somewhere around the same.

Th 2" will be at a huge disadvantage though. I personally run those on my blown 443. I would never do that on a stock displacement.

My vote is 1 3/4 will make more average torque, 1 7/8 will make more peak power, and the 2" will show little, if anything over the 1 7/8"

But the winner will be 1 3/4..

Subscribed...

I totally Agree, I am seeing a Trend of guys who may never go past CAI, Headers, cat back and a tune and want to know what best fits they're need.

What I hope to show is more about the Graph (Area under the Curve) rather than the peak power number

If a person can see how the power curves are shaped then they can decide what best fits they're needs rather than what header makes the most power at 6200.

There is a ton of speculation, and experience in everyones opinion but there are still too many unasnwered questions that I Hope to Answer.

Ted.

[Sack Rat 2SS]

I am anxiously watching this. Subscribed. Thanks Ted for what you do.

[Aaron1121]

Ted-

Thanks so much for volunteering for this test!!!!!

I have a suggestion for the testing:

There has been a lot of speculation if the restriction is with the stock headers, or with the stock cats. Personally, I believe the cats are 80% of it....

For comparison, when you do the test, can you unbolt the factory cats and use a highflow cat or a downpipe, or no cats, and leave the factory headers on for a dyno run?

This might give us a good idea of the restriction point.....

[THUMPER20X]

I cant wait, Im going to build my car with only bolt ons and see what I can get. Keeping stock internals. And when all is done then a tune. I did this with my 93Z and got a best of 12.3 with some weight reduction, boltons only and some killer driving. And the car never broke down ever. 180,000 and never saw a tow truck.

[petman]

as I see it, you can't even use stock cat's with LT's, I mean with out modding, so the assumption is he'll use high flow cats or no cats, and the stock 2 1/2" pipe and factory mufflers breath fairly well, so the headers should show differences

[madmaxx18]

Hey Ted is Borla sending you out a set of shorties for testing yet? Has any other dealers jumped in yet? Alot of us can't wait to see a test done to see what the shorties really put out.

[CWI]

Are you going to do multiple pulls on each to get a fair average?