572 Twin S480's How's spool going to be

Hi all moving forward in the project and second guessing myself.
4.500 bore x 4.500 stroke
Evens A460 heads
Converted A460 TRam - flat top with 105mm front entry TB
Custom mild roller 271@50 744 lift 115 LS
2 Billet 80mm S400SX T6 1.32 A/R Turbo 96mm turbine
2.1/4 headers into 3in hotside
Fuel injected E85

Anyway I'm worried spool is going to be lazy....any words of encouragement or suggestions? 1.15 housing maybe or just fire it up and see how it goes?

I dont see how spooling would be very lazy, you have a big enough displacement to spool up 80mm turbo's pretty rapidly.
You could even go with a pair of 92's and still be good.

I just started testing my 557 ,with 2 80s on it and it looks promising so far .

how much compression ?

Slowpoke wrote:Hi all moving forward in the project and second guessing myself.
4.500 bore x 4.500 stroke
Evens A460 heads
Converted A460 TRam - flat top with 105mm front entry TB
Custom mild roller 271@50 744 lift 115 LS
2 Billet 80mm S400SX T6 1.32 A/R Turbo 96mm turbine
2.1/4 headers into 3in hotside
Fuel injected E85

Anyway I'm worried spool is going to be lazy....any words of encouragement or suggestions? 1.15 housing maybe or just fire it up and see how it goes?

I’m still in testing with mine , ended up going with Holley EFI , combo seems to work decent. 6.65 @206 so far

steve1071 wrote:I’m still in testing with mine , ended up going with Holley EFI  , combo seems to work decent. 6.65 @206 so far

Very Nice Time is this combo in a car?

its in a dragster ,2235 lbs with driver