Are These Dyno Numbers What They Should Be?
05-04-2008, 08:15 PM
#1
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Are These Dyno Numbers What They Should Be? A friend of mine has a 408 iron block, Callies 2" crank, Wiseco -24cc pistons, 228/238 .571/.581 115+4 cam, L92 heads, and a Procharger in his truck. CR is like 8.5/1.The Dyno Jet is at 580 rwhp. Was hoping for 620 to 640 rwhp, was that too much to expect? How about some comments.
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05-04-2008, 10:14 PM
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4L60E tranny. A D1 is in the future, he built this motor for 15 psi. A TH400 is next on the agenda. I think he's just somewhat disappointed that it's not putting out like 50 more rwhp. If you figure NA he should be close to 500 rwhp, then I don't think with FI, looking for another 125 rwhp is unreasonable.
05-04-2008, 10:46 PM
#9
4L60E tranny. A D1 is in the future, he built this motor for 15 psi. A TH400 is next on the agenda. I think he's just somewhat disappointed that it's not putting out like 50 more rwhp. If you figure NA he should be close to 500 rwhp, then I don't think with FI, looking for another 125 rwhp is unreasonable.
Chris
05-05-2008, 08:47 AM
#14
Just going off of my motor, mine is a 377ci low compression and I only made 400rwhp and 450rwtq n/a. So I would guesstimate your 408 n/a would be around the 430-450-rwhp range. Also the P1 is to small for the motor. You are more than likely hurting the performance of it rather than helping it.
05-05-2008, 12:28 PM
#16
Could be the blower runing out of steam or the tune. I Just had mine tuned on the dyno and my first run showed 400rwhp/416rwtq. After an hour of my tuner working on it he pulled 165rwhp out of it. I have a P-1sc @ 8psi on a 9.5 comp 347. I could be over 600 but im runing out of fuel. Who did the tune?
05-05-2008, 12:38 PM
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Maybe get a little more info on the CR. Stock L92's? Head gasket? How far the pistons are out of the hole? etc.. he might be lower on compression than you think. -26cc is a lot.
05-05-2008, 12:49 PM
#18
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wow.. ya only 580rwhp with a 408ci?? Im running a stock bottom end with 7.9 pounds of boost with a D1SC and on a Mustang Dyno- my car pulled 543rwhp.... stock intake, basically stock heads, stock bottom end.. I would up to a D1SC and then you should see those 650-750rwhp with around 10psi...