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Old 07-21-2011, 08:36 PM
 
Location: Eastern Missouri
3,046 posts, read 5,242,377 times
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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?
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Old 07-22-2011, 06:11 PM
PDD
 
Location: The Sand Hills of NC
8,774 posts, read 14,897,329 times
Reputation: 11886
Quote:
Originally Posted by 12GO View Post
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.

Now that's really impressive.
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Old 07-22-2011, 09:00 PM
 
12,577 posts, read 13,327,383 times
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Quote:
Originally Posted by PDD View Post
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.
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Old 07-23-2011, 05:46 AM
PDD
 
Location: The Sand Hills of NC
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Originally Posted by WFW&P View Post
And if memory serves me correct that carb is only 390 cfm.
No. that's on the Nationwide cars, the Cup cars use around 750-800cfm.
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Old 07-23-2011, 08:20 AM
 
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Originally Posted by PDD View Post
No. that's on the Nationwide cars, the Cup cars use around 750-800cfm.
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Old 07-23-2011, 08:44 AM
 
2,120 posts, read 3,871,453 times
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Do people dyno top fuel or funny cars, or are those numbers based on pass time calculations?
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Old 07-24-2011, 07:42 AM
PDD
 
Location: The Sand Hills of NC
8,774 posts, read 14,897,329 times
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Quote:
Originally Posted by johnnytang24 View Post
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.
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Old 07-25-2011, 10:10 AM
 
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Do people watch/attend drag races anymore? Seems like even monster trucks get more TV coverage.

Just wonderin'
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Old 07-25-2011, 11:37 AM
PDD
 
Location: The Sand Hills of NC
8,774 posts, read 14,897,329 times
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Quote:
Originally Posted by Gimme3steps View Post
Do people watch/attend drag races anymore? Seems like even monster trucks get more TV coverage.

Just wonderin'
I think it attracts a younger crowd these days. I went to a local strip this spring and I definitely was in the minority, age wise.

I think Drag racing shows much better in person, you just don't get the sound and smells of Drag racing on TV.
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Old 07-25-2011, 12:34 PM
 
6,368 posts, read 13,940,108 times
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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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