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Old 01-09-2010, 10:25 PM   #1
brAnd7onX

 
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1 3/4's vs 1 7/8's Headers

SLP I believe only offers the 1 3/4's headers and the more popular ones like ARH and Kooks offers 1 7/8's. I guess I just wanted to know is there really any power difference between the two or even any sound difference? Thanks.
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Old 01-09-2010, 11:47 PM   #2
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I would like to know also . I know with big ci decent size cam and good heads u would use the 1 7/8 for max hp but for a bolt on car 1 3/4 should be fine but I would like other opinion .
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Old 01-10-2010, 12:57 AM   #3
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*BUMP* anyone?
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Old 01-10-2010, 08:04 AM   #4
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Quote:
Originally Posted by brAnd7onX View Post
SLP I believe only offers the 1 3/4's headers and the more popular ones like ARH and Kooks offers 1 7/8's. I guess I just wanted to know is there really any power difference between the two or even any sound difference? Thanks.
been discussed 500 times...do a search...

bolt-ons only (no engine work) 1 3/4 the rest 1 7/8...
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Old 01-10-2010, 09:38 AM   #5
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Originally Posted by mr_desmo View Post
been discussed 500 times...do a search...

bolt-ons only (no engine work) 1 3/4 the rest 1 7/8...
I built 3 L99 cars with Maggies and Headers 1 car with 1 3/4 and 2 with 1 7/8 I have not been able to tell any difference between the 2 sizes but they are on different cars.

The L99 car with 1 3/4 Headers belongs to RedSS, which is sitting at 545 RWHP, with 3.4 pulley and Meth injection.

The other 2 L99s have 1 7/8 Headers with 3.6 pulleys and are both sitting at 501 and 505 respectively.

When we tested RedSS with the 3.6 Pulley and NO Meth it was also sitting at 505 RWHP.

So At this point it is still up in the air.

I need someone to donate they're car so I can test the headers back to back on the same car.

I think the difference if any will be larger on an unmodified or N/A car.

I have 1 3/4 and 1 7/8 Headers sitting in wait.

Ted.
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Old 01-10-2010, 09:47 AM   #6
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I think that JannettyRacing could host an online show called " Camaro5 MythBusters."
Of course it would need the obliquity hottie on it...please.
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Old 01-10-2010, 10:21 AM   #7
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SLP tech says that their 1 3/4 produce better low end torque and are good for up to 640HP(@ motor?) applications.
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Old 01-10-2010, 10:33 AM   #8
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SLP tech says that their 1 3/4 produce better low end torque and are good for up to 640HP(@ motor?) applications.
Hmmm, Sounds Familiar, 1 3/4 Header L99 545 RWHP Automatic, X 1.2 = 654 Crank HP.
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Old 01-10-2010, 10:35 AM   #9
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I think that JannettyRacing could host an online show called " Camaro5 MythBusters."
Of course it would need the obliquity hottie on it...please.
Seeeek The Truuuth Luuuke, and in it, you will Find the Force
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Old 01-10-2010, 10:40 AM   #10
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The Force that pushes you back into your seat?

Last edited by PieNsky; 01-10-2010 at 12:33 PM.
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Old 01-10-2010, 11:03 AM   #11
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Ted, I have an appointment for header install and dyno tune on the 19th if you need a car. Lat me know.
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Old 01-10-2010, 11:12 AM   #12
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Quote:
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SLP tech says that their 1 3/4 produce better low end torque and are good for up to 640HP(@ motor?) applications.
This is a pretty accurate statement. Unless we are doing a big cube heads/cam build, the 1 3/4" make more power in the low-mid range. On a 408-454 ci build we use the 1 7/8" as the 1 3/4 hold back power above 5k.

IMHO most 2010 camaros w.stock bore & stroke the 1 7/8's will leave some of theat useable torque on the table for street driving.
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Old 01-10-2010, 12:30 PM   #13
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So if I had 1 3/4's headers and was to eventually slap a roots charger on my camaro would that be okay or would I need to upgrade to 7/8's?
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Old 01-10-2010, 12:33 PM   #14
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So if I had 1 3/4's headers and was to eventually slap a roots charger on my camaro would that be okay or would I need to upgrade to 7/8's?
See post #5
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