Basic header tech questions

[Bowtieracing]

Since it seems impossible to find headers what i am looking for . I try to build them myself.

- Where can i get stainless flanges wich match for LS7 exhaust ports ?

Stainless works lists 1 5/8" and 1 3/4" models only. I want 1 7/8" primarys.

- I try make primary lenght close to kooks long tubes. Is there any gains to

use merge collectors with long tube desing ? See link :

http://www.stainlessworks.net/cart/p...oducts_id=1238


One more. 1 7/8" is outside diameter whan talking about primary tubes?

Thanks!!

[ironworks]

SPD exhaust has everything you need.

Rodger

[speedjohnston]

To determine header sizing you may want to post horsepower level and rpm range to help.

[Bowtieracing]

Originally Posted by speedjohnston

To determine header sizing you may want to post horsepower level and rpm range to help.

Wow! If you can give me any calcultations that would be great


I am going to use stock GM crate LS7. Engine is 7.0L and GM claims
505 hp and 470 lb.-ft I believe this is stock curve:

http://corvetteactioncenter.com/gall...08ls7curve.jpg

[speedjohnston]

I keep some info on hand that may help...

http://www.popularhotrodding.com/eng...exh/index.html

http://www.centuryperformance.com/ex...h-spg-137.html

http://www.chevyhiperformance.com/te...ech/index.html

if you read all that you'll still be confused. lol

[ironworks]

I believe the ATS step headers for the LS7 were known for making the most power. If memory serves me, they step to 2" not to long after the 1.875 tubing.

Rodger

[Bowtieracing]

Originally Posted by speedjohnston

I keep some info on hand that may help...

http://www.popularhotrodding.com/eng...exh/index.html

http://www.centuryperformance.com/ex...h-spg-137.html

http://www.chevyhiperformance.com/te...ech/index.html

if you read all that you'll still be confused. lol

How right you are.. But now i know how to measure primary size