I'm wondering how much of different on the spooling time and hp on 6262
(5-bolt and vband) jounry bearing .82ar

I'm looking to make 450hp on a b18c1 with 81.5 turbo piston eagle rod on a stock b16 head with gsr cam on pump gas

As now I got a peakboost ramhorn manifold with a 3" dp with 5-bolt style

 

No difference. Different flange system. That's it.
6262 is pretty big for the goals. But to each his own on that one.. It must be one of those "just in case I want to grow later" kind of builds.

 

They only offer the 5 bolt up to a .63 housing so if your wanting to run the .82 you will be required to go vband. But like Mac already said .82 a/r is .82 a/r just different ways the downpipe connects to the housing

 

Turbo is more like total overkill

Like using a flamethrower to kill a fly

A much smaller turbo would make the power you want and have a much better power curve.

 

I'm pretty sure 5 bolt housings flow the worst and do make slightly less power compared to a 4 bolt or vband hotside give the same exact ar size.

 

Only in the 650+ range, and that's mainly because of the slight reduction in the size of the volute of that style housing. Not to mention fitment is just a pain in the ***. Considering that flange was originally styled for a topmount of a Mustang SVO turbocharged 4 cylinder application, the only advantage of that at the time for the aftermarket was the fact that for Hondas and other platforms with exhaust manifolds facing the front of the car, it was easier to incorporate it into bays that had powersteering and A/C compressors on the driver's side. Even then, the manifolds that worked for them were crooked so that the compressor housing was closer to the engine block to allow more room for a downpipe for those accessories.

But when you want A/C and Powersteering AND big turbo, something is going to compromise anyway a bit, so the reduction is negligible. that's why I stated that it didn't really matter in the long run.

For the Evolution, the engine bays were designed from the factory to allow for a lot more than a honda was, and even then, the turbine housing flange system for the 4-9 or even 10 weren't the best flowing for power. But they were much smaller an never meant to do what these 62mm 5 bolt ford styles could, so it doesn't matter at this point as that is an apples to grapes comparison, ya know?