ive been trying to see what the s91 is rated at. it seems that alot of the information has been removed. i have a t6 BW s91 on a 408. I would like to also know if a larger wheel can be put it or if any upgrades are available. i heard about a s95 oor something.

 

i belive its like 1500 + hp.

 

Atomicfusion and Koolrays both ran mid low 8s with 3650+lbs race weight with 427ci.

Atomic made 1200+rwhp with mid boost and th400 the turbo is good for 1500HP For sure.
I think with your 408ci the S91 is more than enough to run mid 8s maybe even low 8s.

 

Id say 1300rwhp.... I did 1132rwhp with the S88 with a 370ci motor thru a PG and a S60 rearend.

 

thanks for the info, nassty-how much boost were u running and was that on the 6.0 heads?

 

The S91 is very capable. I have a buddy who just put down 887rwhp with a S88 @ 12 lbs on his 408 and pump gas. The S91 should easily crack the 1000rwhp mark if your engine us setup to push the boost levels up.

 

887rwhp was that with a M6?

 

I'm with Nasty. Should be in the 12-1300 range.

 

The 1132rwhp was on VA Speed's dyno and was 22-23 psi and yes that was on worked 6.0 heads.

 

It took a lil more boost to make 800rwhp for me...with the 370ci. This is how i drove it on the street with pump 93.... 16psi and 817rwhp thru a A2 and S60/spool with 325/50/50 M/T ET Radials. Josh from Extreme..Sponsor on here ran 9.19 or so on my 93, S91 with a 408.

 

Mark and I are both using the garret GT55 91mm turbo's. His is ball bearing mine is journal. I weight #3750 he is a little lighter, I think #3680.
We have not reached the limits of the turbo's yet.
I am not much on the dyno thing, how fast does the OP want to go?

 

Th400. Dana S60.

 

Thanks for the info and again great runs.

 

S91 will make the power you want.....

Our new S88 ET-R wheeled unit will make a little more then the S91 made . Also spools about 300-400rpms sooner

 

thanks for the info, dr turbo- i have a jgs wastegate. 60mm, do you have springs for it. i think im pushing the gate open.