We pretty much do tubular. 
Log Manifold Tube Sizing
Log Manifold Tube Sizing Im planning to build some custom log manifolds for my LQ4/ 72mm turbo setup. I plan to run a larger turbo eventually so i would like to leave some room to grow as well. I have been doing a lot of research but im having trouble finding solid info on pipe sizing for custom log setups. My plan is to run 1.75in primaries into a 2.5in log with a 2.5in crossover.
My main question:
Is my pipe sizing to larger?
If so would 1 5/8 primaries and 2.25in log be better?
Or is it not going to make any difference?
My main question:
Is my pipe sizing to larger?
If so would 1 5/8 primaries and 2.25in log be better?
Or is it not going to make any difference?
Last edited by thirdgen60; Aug 30, 2011 at 03:35 PM.
Once i build a short block ill probably end up with at least a 78 but things always change is you go so i cant really say for sure.
I also havnt had much luck finding pictures of to many customs log setups either. So if you have pics post them up, it doesnt matter what car i want to see them!!
I also havnt had much luck finding pictures of to many customs log setups either. So if you have pics post them up, it doesnt matter what car i want to see them!!
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From: Norn Iron
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From: Norn Iron
Ive MIG welded stainless plenty of times with the same gas I use for steel. Not sure what it's called over there, but basically argon with like 2-5% CO2 or something like that.
The shield gas might be critical if the welding needs to be super duper perfect. Lets face it, it's just an exhaust manifold !
It isnt trasnfering goods for human consumption, nor is it anything super high tech.
The shield gas might be critical if the welding needs to be super duper perfect. Lets face it, it's just an exhaust manifold !
It isnt trasnfering goods for human consumption, nor is it anything super high tech.
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Here is parish8's thread on his log manifold build, things look awesome:
https://ls1tech.com/forums/conversio...rbo-combo.html
and attached to the OP post is a sweet looking manifold, just some ideas:
https://ls1tech.com/forums/forced-in...s-headers.html
https://ls1tech.com/forums/conversio...rbo-combo.html
and attached to the OP post is a sweet looking manifold, just some ideas:
https://ls1tech.com/forums/forced-in...s-headers.html
I one reason that would make me do tubular is they look cool if done correctly, but i suppose a log can too.
Here is parish8's thread on his log manifold build, things look awesome:
https://ls1tech.com/forums/conversio...rbo-combo.html
and attached to the OP post is a sweet looking manifold, just some ideas:
https://ls1tech.com/forums/forced-in...s-headers.html
https://ls1tech.com/forums/conversio...rbo-combo.html
and attached to the OP post is a sweet looking manifold, just some ideas:
https://ls1tech.com/forums/forced-in...s-headers.html
