Difference in 78mm and 90mm?
Difference in 78mm and 90mm? Im looking into getting a FAST intake manifold...it comes in 78 or 90mm...
What I'm thinking is obvoiusly go with the 90mm b/c more airflow allowed in...thus more hp? Is it really that simple? Somone please explaine the differences and gains/losses a 78 as compared to a 90mm has.
btw I plan on making up to 600rwhp with the addition of n2o if that really matters.
What I'm thinking is obvoiusly go with the 90mm b/c more airflow allowed in...thus more hp? Is it really that simple? Somone please explaine the differences and gains/losses a 78 as compared to a 90mm has.
btw I plan on making up to 600rwhp with the addition of n2o if that really matters.
The 78mm manifold will produce about the same gains as an LS6, which can be had for MUCH cheaper. The 90mm will only show gains once you've got a LARGE cam or H/C car.
Originally Posted by TheBlurLS1
The 78mm manifold will produce about the same gains as an LS6, which can be had for MUCH cheaper. The 90mm will only show gains once you've got a LARGE cam or H/C car.
But more to the point the 78mm isnt exactly cheap, so I say spend the $$$ once and get the 90mm, but do not get the FAST 90mm tb, Too many issues with the Blade sticking after hard WOT runs. Nick Williams makes a nice one. My friend has a 01 T/A with a 402, FAST 90mm intake and NW TB, ran high 10's and is expected to be a easy mid n/a this spring.
