Turbo sizing...T4, 13BT SP, 9.4 rotors.

[proz07]

so whats full boost to you? i mean 30psi full boost at 2500rpm aint happening. and being that you have high comp rotors you will have much better response anyway. i assume this is a 2nd gen being you cant find manifolds for it. and opting for the t4 turbo i would say puts you right around the area of a 60/62-1 t04 at maybe 3000rpm depending on how your exhaust is ported. it just seems you would have much better options going with a t3 for response and power as you can still get 450hp out of one. but for a manifold being 2nd gen you may have to get a custom or being your "building" a car you might look at making your own. if you dont have a welder you can pick one up for a couple hundred from home depot that will do 90% of what you need. it will pay for itself in no time especially if you use it to make your own braces/parts (seam welding)

z

[Whizbang]

Originally Posted by proz07

so whats full boost to you? i mean 30psi full boost at 2500rpm aint happening. and being that you have high comp rotors you will have much better response anyway. i assume this is a 2nd gen being you cant find manifolds for it. and opting for the t4 turbo i would say puts you right around the area of a 60/62-1 t04 at maybe 3000rpm depending on how your exhaust is ported. it just seems you would have much better options going with a t3 for response and power as you can still get 450hp out of one. but for a manifold being 2nd gen you may have to get a custom or being your "building" a car you might look at making your own. if you dont have a welder you can pick one up for a couple hundred from home depot that will do 90% of what you need. it will pay for itself in no time especially if you use it to make your own braces/parts (seam welding)

z

I can actually get T4 as small as a .69 A/R. For the purpose of the hill climbs, i need the turbo to spool and quick. Top end power does need to be there but a peaky top end is useless. Basically i need to maximize the under curve area. Figure a redline of 8000 or less.

I am equipped with a good Lincoln Electric 115v welder (best one i could buy two years ago). But for a good thicker runner manifold, i would need a welder with a bit more OOMPH or a TIG.