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So while I still wait for the trans to be finish assembled (my guy was getting it together and found that the output shaft liberty sent him was not for a corvette since it was about 6" shorter lol)... I decided to play a bit with Desktop dyno. I think it is a little bit optimistic, but how much, not quite sure. This is flywheel numbers obviously. I feel that it should peak a bit higher (closer to 7500 or so) but I would be fine with this curve if it comes down to it.
So while I still wait for the trans to be finish assembled (my guy was getting it together and found that the output shaft liberty sent him was not for a corvette since it was about 6" shorter lol)... I decided to play a bit with Desktop dyno. I think it is a little bit optimistic, but how much, not quite sure. This is flywheel numbers obviously. I feel that it should peak a bit higher (closer to 7500 or so) but I would be fine with this curve if it comes down to it.
looks about 760peak, and with a 12% loss, has you 660ish to the wheels. You have a nice build but idk if its enough to put 660 down.
I don't feel like digging up what I did a few months ago, but i sim'd my setup (not on desktop dyno) that i just took out of the car and it was about 50hp high on the fllywheel estimate compared to track times and the dyno curves i had. It nailed the shape of the curve though, so that was cool.
looks about 760peak, and with a 12% loss, has you 660ish to the wheels. You have a nice build but idk if its enough to put 660 down.
I don't feel like digging up what I did a few months ago, but i sim'd my setup (not on desktop dyno) that i just took out of the car and it was about 50hp high on the fllywheel estimate compared to track times and the dyno curves i had. It nailed the shape of the curve though, so that was cool.
Oh I 100% agree lol. Realistically I see this thing maybe being 700-720 crank at most. Which would be like 610-630 wheel.. Even then, 630 will probably be a bit much. I'd put my eggs in the 600-615 basket probably. I did this mainly for the curve as well. I feel that it will probably peak further to the right (7500ish).
I think they did a build similar to this in a magazine (408 I think) and it was like 708 hp (around 7,000 rpm) and tq was like 577 (at like 5,500 rpm).
I think they did a build similar to this in a magazine (408 I think) and it was like 708 hp (around 7,000 rpm) and tq was like 577 (at like 5,500 rpm).
I would love to see that article if you can remember what magazine it was. But I think that is very realistic.
I think they did a build similar to this in a magazine (408 I think) and it was like 708 hp (around 7,000 rpm) and tq was like 577 (at like 5,500 rpm).
Unless it is the Borowski 408 they did for that sweepstakes. It made 717/608 with a fast hi ram and RHS LS3 heads. Less compression than mine and it peaked at 6800.
I think they did a build similar to this in a magazine (408 I think) and it was like 708 hp (around 7,000 rpm) and tq was like 577 (at like 5,500 rpm).
Actually, pretty sure it was @speedtigger 403 motor.
403 ls2 block, 12:1 scr, tfs (tea) 255 ls3 heads, llsr 246/266 111 680 cam. ported fast mid length runner, crower shaft rockers, comp needle bearing solids, *1237x springs, manton rods, mega mouth ssra ram air kit. No PS, AC or PB. Pulled maybe 300lbs out of the car.
Last edited by Bspeck82; Aug 12, 2023 at 12:34 PM.
403 ls2 block, 12:1 scr, tfs (tea) 255 ls3 heads, llsr 246/266 111 680 cam. ported fast mid length runner, crower shaft rockers, comp needle bearing solids, *1237x springs, manton rods, mega mouth ssra ram air kit. No PS, AC or PB. Pulled maybe 300lbs out of the car.
Definitely will be a stout combo. I feel that maybe the cam duration could be a bit more being a solid roller? Straight up specs are bout the same as mine at 244/266. I think mine could have used some more lift but that was Brian's decision lol. Are you running the 255s out of the box?
Definitely will be a stout combo. I feel that maybe the cam duration could be a bit more being a solid roller? Straight up specs are bout the same as mine at 244/266. I think mine could have used some more lift but that was Brian's decision lol. Are you running the 255s out of the box?
How much lift does your cam have? Yes the 255s are out the box but milled to 63cc.
My cam was designed with the intention of shifting @ 7500ish. Peak at 6800 to 7000.
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