Twin Turbos For a Puller and Compression Ratio

[dieselpolaris]

Putting together an all out puller and our local club allows us to run twins as long as the inducer on the the primary is bushed down to 3.0. I was thinking of running an s465 on top with .91 divided exhaust housing and externally gated with an s488 on the bottom with a billet wheel and race cover 1.32 exhaust housing. Truck will have a ported and polished head, not sure on whos cam to run yet, but will have a 13mm pump set to around 625cc of fuel. Looking for around 1100hp. Also wondering if it would be benifical to decompress lower than 15:1 since i will have plenty of air?

 

[SuperSonic]

much bigger

 

[RacinDuallie]

Yep bigger

 

[dieselpolaris]

How much bigger you guys thinking?

 

[Ben46a]

Im thinking a 472 or 475 over a GT55 or s 595

 

[dieselpolaris]

Just out of curiosity but the remember the primary inlet will have to be bushed down to 3.0 inlet. Is a charger that is considerably bigger than that really gonna flow that much more air considering it will be restricted to the 3.0 inlet?

 

[dieselpolaris]

Any comments?