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How Much Rear Wheel Horsepower?


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I was within 3 horsepower and 1 ftlb of my personal guess.

247 horsepower, 274ftlbs of torque, to the tire. My guess was 250/275 respectively. Dyno guy watched the secondaries on my qjet (owner of the car does the pulls), and said they weren't opening until about 4300rpm, loosing me some torque. He figures it's got another 20 or so hp/tq in it just adjusting the secondaries.

I'm going back through the thread to see who gets a virtual cookie, and who, if any, gets $20 paypal for an exact, unedited guess of HP AND TQ.
 
Buick 350s have circular open chambers. Plus with the small cc heads building it the sbc way at zero deck with .040 quench (head gasket thickness) and flat tops it would be over 12:1. Its a necessity to have a short piston on a sbb. The aluminum heads however have a more conventional heart shaped chamber, but still small at 55cc.

Mr. Sony, So you are saying that the open less restricted design of the sbb removes or lessens the need for a short quench height? That makes sense to me but is it the reason?? Thanks
 
Mr. Sony, So you are saying that the open less restricted design of the sbb removes or lessens the need for a short quench height? That makes sense to me but is it the reason?? Thanks
No. What I'm saying is the open chamber design of the heads means that there is no conventional quench zone. at all. so the cylinder walls and piston top acts as it's own quench pad, if you could call it that.
 
Spent too long trying to get my dumb**** phone to take a not blurry picture of a piece of paper.
dyno1.jpg

dyno2.jpg

I didn't want to rev it much passed 5k, what with the stock rods and all. Plus, I paid for the cheaper option and we were encroaching into "by the hour" territory. It's got some more left in it, especially the secondaries not opening fully until 4300rpm, so I got some work to do.
 
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**not saying you’re claiming ridiculous numbers like the guys who say there tbi 350 with duelos heads and an even cam make 587hp** But, Something isn’t right in that chart, horsepower and torque ALWAYS cross at 5252. Can’t change. Torque is measured with a strain gauge horsepower is a mathematical equation of torque times rpm divided by 5252. There’s no way hp and tq can cross at 4600 rpm without manipulation
 
**not saying you’re claiming ridiculous numbers like the guys who say there tbi 350 with duelos heads and an even cam make 587hp** But, Something isn’t right in that chart, horsepower and torque ALWAYS cross at 5252. Can’t change. Torque is measured with a strain gauge horsepower is a mathematical equation of torque times rpm divided by 5252. There’s no way hp and tq can cross at 4600 rpm without manipulation
Never heard that one.....
EDIT: Sumbich!
 
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