Ok I went back to the drawing board selling off the small S360 I was using for mockup and have my eye on a pair of Holset HX55's which are pretty close to BorgWarner EFR 9180s as I can get them cheap here
So if I was to say its either going to be a 502 at 9.19:1 CR or a 521 at 8.91:1 CR really fuck all in it price wise, about $50 I think
The spec on the Holsets is
99mm billet MFS 7 blade deep superback compressor wheel with 67mm inducer
86mm high flow 12 blade turbine wheel with 77mm exducer
.89a/r twin scroll T6 housing
Now from BW's matchbot site it seems like I could probably run that, their spec is a little different on the compressor size with a 92mm wheel and 68mm inducer but the turbine specs are pretty much the same with an 87mm .9 a/r
I know its not exact but it gives me the closest match up I can find
So with the goal of running 10psi maybe up to 15psi max (and this will all be broken in and tuned on a dyno not by me, I'm only amassing the parts!) to run on 99octane with booster if needed are these feasible?
The maps play out like this for the 521, close to the choke line at the max I'd ever take the engine to rpm wise but safe. Both 521 and 502 were within it when at 10psi or 15psi max
So if I was to say its either going to be a 502 at 9.19:1 CR or a 521 at 8.91:1 CR really fuck all in it price wise, about $50 I think
The spec on the Holsets is
99mm billet MFS 7 blade deep superback compressor wheel with 67mm inducer
86mm high flow 12 blade turbine wheel with 77mm exducer
.89a/r twin scroll T6 housing
Now from BW's matchbot site it seems like I could probably run that, their spec is a little different on the compressor size with a 92mm wheel and 68mm inducer but the turbine specs are pretty much the same with an 87mm .9 a/r
I know its not exact but it gives me the closest match up I can find
So with the goal of running 10psi maybe up to 15psi max (and this will all be broken in and tuned on a dyno not by me, I'm only amassing the parts!) to run on 99octane with booster if needed are these feasible?
The maps play out like this for the 521, close to the choke line at the max I'd ever take the engine to rpm wise but safe. Both 521 and 502 were within it when at 10psi or 15psi max


