[Suicidal Racing]

Yep the 85mm wheel was said to be max you want to go with if using a 96mm wheel for the s400s. It's odd he has 88/103s an yet the he has these 85/102s.. I think these didn't do like you said good on the exhaust side so they made a better version..

I don't think these are gt55 clones they are more like a gt50. 55 would have a 111mm exhaust wheel like the on3 an vsr 94-106mm deals. As I said in the other thread I believe on3 an vsr use way different exhaust wheels. Vsr has a 10 blade count an on3 is 11 if I remember correctly.

 

[Suicidal Racing]

Why not go with an 88mm? In the description on the VSR site it says the 85mm is rated at 1450hp, but that seems a little lofty. The 88 with a billet wheel should make more, I think. I picked up the 88mm billet wheel with 1.32 AR and have it on my 5.3. I don't have any comparison to the 85, but Ican say it's waaaay better than S475 was i was running last year. I dropped 1/2 second at the same boost level.

Your exhaust wheel is what dictates your max power. So a 96mm vs a 102mm. If the wheels are close to the same design the 102mm will win even if it's 3mm less on the compressor side. Right now the billet 85/102 is the same price as a billet 88/96mm. So the price is nice but haven't read or seen much about the vsr 85/102s. It's either this for my next build or twin billet eBay 7875s which would cost the same.

 

[Suicidal Racing]

Exhaust wheel is your restriction. So yes the 85/102mm with the bigger exhaust wheel would have more head room vs a s400 with the std 96mm exhaust wheel. That's why with a 96mm wheel Jose of fi an such have said a 85mm compressor is max you can really go.after that even with a larger compressor in it the exhaust flow is already maxed so it won't support the extra power that you could make from the larger compressor.

 

[Suicidal Racing]

No they don't work as good as joses for sure.seems the good 96mm wheels start having a bp issue in high 20 to low 30psi choke wise. I do know a members single s475 l33 went 5.0s on meth.