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How much I am leaving on the table?

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Old Oct 3, 2012 | 05:51 PM
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Default How much I am leaving on the table?

I ordered a set of ARH 1 7/8 headers but was sent 1 3/4 from WS6 store. Its really not a big deal, cause the price difference was only $20. Its just that I wanted to go ahead and do 1 7/8 to get the most out of setup, but don't know how much of a hassle its going to be to get them shipped back and wait on some more. I will call them in the morning to see what's up, just wondering how much I'm losing if I keep them?
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Old Oct 3, 2012 | 05:58 PM
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since your not building an all out race engine it will not make a difference. I actually prefer 1 3/4 for stock cube ls1's. think about it, if a performance 427 LS7 runs the bigger set then why does a smaller 346 ls1 need something that big
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Old Oct 3, 2012 | 06:00 PM
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Leaving very little honestly. I didn't pick up anything at the track after I went with TSP 1 7/8 over my Pacesetter 1 3/4 on a H/C/I 346.
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Old Oct 3, 2012 | 06:04 PM
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Yeah, I figured it wasn't too big a difference. Now I wish I would have bought the pacesetters and saved a $1000. Guess I just wait until tomorrow and see what they say though.
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Old Oct 3, 2012 | 07:10 PM
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Originally Posted by got milk??
Leaving very little honestly. I didn't pick up anything at the track after I went with TSP 1 7/8 over my Pacesetter 1 3/4 on a H/C/I 346.
really? thats surprising. even after a tune?


if ARH will pay for your return shipping which they should id go bigger. why not. when you start modding more youll be glad you did.
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Old Oct 3, 2012 | 07:36 PM
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Yeah, i dont wont to regreat it later. Going to wait and see what they say.
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Old Oct 3, 2012 | 07:46 PM
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If you don't want to regret or always second guessing your headers then wait and get the 1 7/8" one.
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Old Oct 3, 2012 | 09:05 PM
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The 1 7/8" headers make a little more power on a totally stock engine....that gap increases as you mod. Get the 1 7/8" headers and do it right.
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Old Oct 4, 2012 | 02:11 AM
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Originally Posted by 01'SSLSX
since your not building an all out race engine it will not make a difference. I actually prefer 1 3/4 for stock cube ls1's. think about it, if a performance 427 LS7 runs the bigger set then why does a smaller 346 ls1 need something that big
There is A thread on here proving this statement totally false. The larger headers actually gain a decent amount. Given the small price difference, the HP/dollar ratio is pretty stout.

The larger headers will leave you room to grow. If you decide to stroke it or supercharge it later on, the smaller tubes will quickly become a restriction.
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Old Oct 4, 2012 | 03:35 AM
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The thread I have seen (and reposted) has shown something like +7hp and -7tq but it was pacesetter IIRC and tsp headers...not apple's to apple's.
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Old Oct 4, 2012 | 08:48 AM
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Originally Posted by bww3588
There is A thread on here proving this statement totally false. The larger headers actually gain a decent amount. Given the small price difference, the HP/dollar ratio is pretty stout.

The larger headers will leave you room to grow. If you decide to stroke it or supercharge it later on, the smaller tubes will quickly become a restriction.
thats your opinion, your not proving anything with just a statment like that..
oh & look at post #3 again, this is the kind of results ive seen at track and dyno sessions
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Old Oct 4, 2012 | 09:03 AM
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In my case I've got pacesetter 1 3/4 headers. I'm pushing 523rwhp on a 346ci H/C nitrous car. I asked my tuner who is very well known in the southeast about the bigger header thing and he said that in my situation my restriction isn't the exhaust it's the LS6 manifold and TB.
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Old Oct 4, 2012 | 10:07 AM
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Originally Posted by BigBirdLS1
In my case I've got pacesetter 1 3/4 headers. I'm pushing 523rwhp on a 346ci H/C nitrous car. I asked my tuner who is very well known in the southeast about the bigger header thing and he said that in my situation my restriction isn't the exhaust it's the LS6 manifold and TB.
Thats good to hear. I already have a 90/90 ready to install.
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Old Oct 4, 2012 | 10:31 AM
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Just get the 1 7/8" and be done with it. It's been proven and beaten to death on here in the past. The only people that actually lose power are the C5 crowd, and that's from the primary length / collector location and nothing else.

BigBird, you'll make more power being an H/C/I car, let alone the nitrous, with bigger primaries. Agreed your TB and intake are a restriction, but the primaries are as well.
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Old Oct 4, 2012 | 10:55 AM
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Originally Posted by dr_whigham
Just get the 1 7/8" and be done with it. It's been proven and beaten to death on here in the past. The only people that actually lose power are the C5 crowd, and that's from the primary length / collector location and nothing else.

BigBird, you'll make more power being an H/C/I car, let alone the nitrous, with bigger primaries. Agreed your TB and intake are a restriction, but the primaries are as well.
Yeah, I'm just waiting on WS6store to get with me now.....
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Old Oct 4, 2012 | 12:12 PM
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Originally Posted by 01'SSLSX
thats your opinion, your not proving anything with just a statment like that..
oh & look at post #3 again, this is the kind of results ive seen at track and dyno sessions
It's not an opinion. It's fact. 1 7/8 make more power on a stock motor and up.
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Old Oct 4, 2012 | 05:52 PM
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Well guys, looks like I was wrong. When I measured the headers I measured from the inside and ARH told me I should have measure outside primary size. Now I just need to shine them up and get them installed.
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Old Oct 4, 2012 | 09:30 PM
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Originally Posted by Guitar
It's not an opinion. It's fact. 1 7/8 make more power on a stock motor and up.
im just stating what I have personally seen with these exhaust parts, but sorry i cant just take your word as Fact..lol
i have read that some companys have done comparisons where the bigger headers were better but personal company gain could be a factor

fwiw my camaro makes 425hp 390tq on mustang dyno i have pacesetter 1-3/4 headers, 233/239 cam, ported/milled 243's, fast 92, 4.10 gears with 28" tall drag radials & much more

but what do i know...

Last edited by 01'SSLSX; Oct 4, 2012 at 09:47 PM.
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Old Oct 4, 2012 | 10:10 PM
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Originally Posted by 01'SSLSX
im just stating what I have personally seen with these exhaust parts, but sorry i cant just take your word as Fact..lol
i have read that some companys have done comparisons where the bigger headers were better but personal company gain could be a factor

fwiw my camaro makes 425hp 390tq on mustang dyno i have pacesetter 1-3/4 headers, 233/239 cam, ported/milled 243's, fast 92, 4.10 gears with 28" tall drag radials & much more

but what do i know...
Your doing exactly what everyone else is doing, except your claiming your opinions as fact with nothing to back it up except "personal experience", then turning around in the same sentence and calling everyone else's "personal experiences" opinion.

The fact of the matter is, you have "personal experience" with no credible proof, and we have the same, but with an entire forum with solid proof that backs our "opinions" up.

You have done nothing but state your opinion as fact and tell me that my opinion is just that, an opinion that cannot be taken as fact.
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Old Oct 5, 2012 | 06:23 AM
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Originally Posted by 01'SSLSX
im just stating what I have personally seen with these exhaust parts, but sorry i cant just take your word as Fact..lol
i have read that some companys have done comparisons where the bigger headers were better but personal company gain could be a factor

fwiw my camaro makes 425hp 390tq on mustang dyno i have pacesetter 1-3/4 headers, 233/239 cam, ported/milled 243's, fast 92, 4.10 gears with 28" tall drag radials & much more

but what do i know...
Good numbers. And I also guarantee you if you sold the 1 3/4" headers and bought a set of 1 7/8" you'd see a healthy gain from midrange and up.

Nobody is saying 1 3/4" is ****, LOL! Just that there is some more power to be had from the 7/8's. C'mon man. You're an HCI car.
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