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Going thru the threads, not a single real into it automotive race engine thread? So I decided to start one. Monday we dyno'ed a 12.9 to compression 505" Pontiac with the street strip CV-1 heads from Roland Racing and our CNC port work.
Even tho the carbs were still a bit too rich at the end of dyno'ing, the engine made 978hp, and over 700 lbs. of torque the entire RPM range the engine will be run. The fun factor in making 32 pulls in a day of dyno'ing, is almost as much as being at the dragstrip making passes. This is going to be a nitrous based engine, but this session was stricly on the engine with no NOS. Fuel was Q-16. Dyno room temps were in the 98-99 degree range all day. No carb hats were used, so the engine did not get that benefit. THIS DYNO IS USUALLY "CONSERVATIVE" ON IT'S NUMBERS, AS YOU CAN ALWAYS BACK THEM UP WITH ON TRACK PERFORMANCE. We have dyno'ed 2 engines that were in magazines, and on the west coast (where the magazines love to dyno engines)those engines showed 85-87 more hp than our dyno.
Anyone else dyno engines, build them, know what the one in your car/truck makes hp and tq wise?
Going thru the threads, not a single real into it automotive race engine thread? So I decided to start one. Monday we dyno'ed a 12.9 to compression 505" Pontiac with the street strip CV-1 heads from Roland Racing and our CNC port work.
Even tho the carbs were still a bit too rich at the end of dyno'ing, the engine made 978hp, and over 700 lbs. of torque the entire RPM range the engine will be run. The fun factor in making 32 pulls in a day of dyno'ing, is almost as much as being at the dragstrip making passes. This is going to be a nitrous based engine, but this session was stricly on the engine with no NOS. Fuel was Q-16. Dyno room temps were in the 98-99 degree range all day. No carb hats were used, so the engine did not get that benefit. THIS DYNO IS USUALLY "CONSERVATIVE" ON IT'S NUMBERS, AS YOU CAN ALWAYS BACK THEM UP WITH ON TRACK PERFORMANCE. We have dyno'ed 2 engines that were in magazines, and on the west coast (where the magazines love to dyno engines)those engines showed 85-87 more hp than our dyno.
Anyone else dyno engines, build them, know what the one in your car/truck makes hp and tq wise?
Those numbers are certainly impressive but the NASCAR guys are getting 850+ HP out of 358 CI with 12-1 CR, flat tappet cams and running 99 octane unleaded gas and with one 4 bbl carb.
One more thing they run them for 4 hrs. straight at between 6,000 and 9,500 rpm's.
Those numbers are certainly impressive but the NASCAR guys are getting 850+ HP out of 358 CI with 12-1 CR, flat tappet cams and running 99 octane unleaded gas and with one 4 bbl carb.
One more thing they run them for 4 hrs. straight at between 6,000 and 9,500 rpm's.
Now that's really impressive.
And if memory serves me correct that carb is only 390 cfm.
Do people dyno top fuel or funny cars, or are those numbers based on pass time calculations?
I think the HP numbers for Top Fuel and Funny car are just advertising hype. The numbers seem to go up by 1,000 HP every year.
Now doubt they do make a ton of HP, are fast as hell and will blow out your eardrums in a second.
I don't know maybe somebody has a Dyno to record the real numbers but as you suggested maybe the numbers are based on pass calculations.
Doesn't really matter how much HP they make as long as they are loud and fast.
If it's a younger bunch, what sort of cars do they race? Is it mainly an import crowd?
I haven't been to the drags in probably 20 years. Then it was mostly early Camaros, Chevelles, a few Mustangs and maybe an ocassional NoPower.
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