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Discussion Starter #1
Not built yet but will be between 351-400ci sbf with AFR220 heads. If cam and other variables are speced correctly what route would you go? For local class I'm limited to 88mm cast wheel like a SX500-88 at 3300lbs or 82mm max for billet wheel at 3250lbs. Can the 82 billet hang with the cast 88 at only 50lbs less? Would like to be able to swap to billet 76 or cast 80 for ultra and classes that don't allow the bigger turbo so what ci limit should I not surpass so I can still use smaller turbos? Thanks!!
 

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Do they allow the billet to be on a S500/ GT55 frame/chassis??
 

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393 with a GT55 based turbo with an 82mm billet compressor wheel is where i would be in a heartbeat....
 

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Discussion Starter #5
393 with a GT55 based turbo with an 82mm billet compressor wheel is where i would be in a heartbeat....
Thanks that seems to be the concensus. 370-400 inch with GT55 based 82mm billet. At 393 ci are any of the legal Ultra turbos a good fit?
 

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Thanks that seems to be the concensus. 370-400 inch with GT55 based 82mm billet. At 393 ci are any of the legal Ultra turbos a good fit?
Considering the record turbo holder (John Keesey) runs a 427ci with our 76mm yeah it would work. ;). GT55 though would not be ultra legal, but much better fit for that class......John Keesey got folks upset with the GT55 last year in Ultra. :-kill
 

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Discussion Starter #7
Considering the record turbo holder (John Keesey) runs a 427ci with our 76mm yeah it would work. ;). GT55 though would not be ultra legal, but much better fit for that class......John Keesey got folks upset with the GT55 last year in Ultra. :-kill
That's what I was tthinking :)
 
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