Low dyno numbers??? 670rwhp 408 w/s91 @ 12lbs
08-26-2013, 06:23 PM
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Low dyno numbers??? 670rwhp 408 w/s91 @ 12lbs Does 670rwp seem low for a 408 w/s91 turbo at 12lbs of boost? I was expecting around 100 more up. this is through a 4l80e and 9" with a 242/238 cam. Will know more details tomorrow but was told tires were spinning some on the dyno.
Last edited by theblur98ss; 08-26-2013 at 07:28 PM.
08-26-2013, 07:43 PM
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more grunt with less boost than me!! Whats it like to drive on the street with the s91? I hit 627 on my 408 @ 15psi but my gt4708 is choking my engine still. Full boost by 3000rpm though. Great for a street turbo.
08-26-2013, 08:15 PM
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I'll know more tomorrow and have the graph. This is on a mustang dyno through full exhaust. Exhaust is 4" to the axle and splits into dual 3"exits. Last year the same setup made 602 on a dyno jet at 7.5lbs of boost but it was cooler and less humid.
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08-27-2013, 08:45 PM
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I feel better about the numbers today. If you factor in mustang vs dynojet numbers, 11lbs of boost on a turbo that is barely starting to spin and throw in the correction factor I think the combo is right where it should be.
