[9SecBuick]

I am taking my 496 to the dyno on Thursday let's get a little pool of guesses together. Here is the basic combo:

496 BBC
4.310 bore 4.250 Stroke
13.4:1 Compression
Dart 335 CNC with some hand work (sanding rolls mostly)
Solid Roller .798 .775 280 288 duration 110 lsa in at 106 icl


Let's hear some guesses.

 

[hjdca]

the 13.4 compression is the real wild horse for me... I have never dealt with a motor with that high compression, but, its got to be worth maybe 50 hp over an 11:1 motor... My guess would be 675 hp at the crank... Not sure what it would be at the rear wheels due to the slush box, stick stick shift variances...

 

[4drsleeper]

740hp/680tq

 

[Bob West]

800/650

 

[ShawnT]

787hp/665tq is my guess... but I have no idea

 

[rustbucket79]

I would be sad if it made less than 800 HP. It'll need to spin some RPM to get there.

 

[Harold Sutton]

Which kind of Dyno, engine or Chassis? Have you run it at a track? What speed did it run and how much does it weigh? My son had a high compression 481" with those same heads, it ran a best of 9.98 @ 133.70 at a weight of appx. 3550 lbs. with a T-400, 4.11 gears and a 4200 stall ATI converter. I'm guessing it made a little less than 700 h.p. at the flywheel. On a Dynojet it made 561rwhp and 638 rwtq.

 

[SS_Sean]

760 hp/670 tq

 

[wade w]

More than I have.:yes:

 

[Jason Snyder]

812/695

 

[grovey]

765/665

 

[9SecBuick]

Well with an 8 degree shorter cam and .710 lift with a set of heads with the same runner volume but worse peak and average flow numbers by a min of 20 cfm it went 9.41 @ 141 in 3480 lbs. That combo was never on the dyno, but by all of the et and mph to weight calculators it was right around 750-775 at the crank. Honestly if it makes less than 800 I will be dissappointed, I think "theoretically" it will make close to 850. I am assuming it will be in the 7200-7500 rpm range. But hey I will def know tomorrow.

 

[bracketchev1221]

I would say 800/680.

 

[Orr89rocz]

My buddy had a similar setup but never dyno'd it. Around same raceweight it went 9.4's-9.5's at 138-140's i believe. Now in a vega, car goes 9.0's at 151 i believe. I would think his is closer to 750-775 and your setup should be closer to 800 at crank.

 

[BowtieAaron]

620rwhp

775flywheel hp

 

[67RS502]

should make 800-850hp, I'll guess 825 should be real close.
youre right should make over 800.

 

[9SecBuick]

It made 863hp 704tq

 

[ShawnT]

Very nice! I told you I had no clue
When will you have some track times?

 

[9SecBuick]

I am installing it this weekend, planning (if no issues arise with the new Lemons Headers) to take it out on April 30.

 

[SS_Sean]

Nice job!!