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Re: Did WJ really say ??? .....
[Re: gofish]
#1534251
11/18/13 07:25 PM
11/18/13 07:25 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
What are the differences between valvetrain in NASCAR engines versus drag racing?
From what I know (outsider perspective), if you're comparing NASCAR with NHRA Pro Stock, there are big difference in: peak valve lift, rate of lobe acceleration, valve train weights, and durability expectations, just to name what I can think of.
The late Smokey Yunick said something in one of his books decades ago about how he didn't know how pro drag race engines managed to keep their valve train together even for such short runs, because even way back then the drag engines were already pushing the envelope well past where circle track engines dared go. 
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Re: Did WJ really say ??? .....
[Re: Quicktree]
#1534254
11/18/13 07:36 PM
11/18/13 07:36 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
I wonder how nascar can turn 10k plus for 600+ miles 
They work closely with their cam company's engineers and live and die by the SpinTron. They use all the latest-and-greatest stuff, even if it is still a flat-tappet setup: lower lobe lifts, higher rocker ratios, DLC-coated lifters, welded cam cores for hardness, etc.
It's pretty trick stuff for "just a bunch of solid lifter cams", eh? 
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Re: Did WJ really say ??? .....
[Re: gofish]
#1534255
11/18/13 07:50 PM
11/18/13 07:50 PM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
What are the differences between valvetrain in NASCAR engines versus drag racing? Is it simply difference in application? Tractor pulling is another sport that runs some big RPM for much longer than drag racers.
Danny
camshaft profiles, engine speed, component weight to name a few
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Re: Did WJ really say ??? .....
[Re: Cab_Burge]
#1534256
11/18/13 07:53 PM
11/18/13 07:53 PM
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Joined: Jul 2008
Posts: 30,451
Florida STAYcation
dOoC
OP
The village idiot's idiot
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OP
The village idiot's idiot
Joined: Jul 2008
Posts: 30,451
Florida STAYcation
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Quote:
Quote:
..... I was SURE he said 200k$ on valve springs during a season of racing .... BUTTT did he actually say that a rear end housing was 250k$ .... JUST for the empty housing ? .... What-the-fugg .... 
Didn't one of the Summit drivers, Jason or Greg say they where spending $100,000.00 a year on valve springs several races back on T.V.  If so maybe Warren is courting another sponsor and is padding the numbers to enhance the operating expences for the sponsorship budget 
Padding the numbers ? .,.,, that was on another topic here a day or so ago !! ...
I think AJ said the # 125 or 150 in a past interview.
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Re: Did WJ really say ??? .....
[Re: BradH]
#1534257
11/18/13 07:55 PM
11/18/13 07:55 PM
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Joined: Oct 2007
Posts: 4,209
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,209
New York
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They should just compare bank statements.
Boffin Emeritus
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Re: Did WJ really say ??? .....
[Re: gofish]
#1534259
11/21/13 02:13 AM
11/21/13 02:13 AM
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Joined: May 2004
Posts: 2,864
IN
Irun5snd8th
master
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master
Joined: May 2004
Posts: 2,864
IN
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Lets do some math. Lets say we are a really good team and we average 6 runs per event and we change after every 2 passes. 1600 X 3 = 4800 per event X 23 (I dont remember how many) events = $110400 just for the races. Now lets figure in all the hours they run on the dyno and in testing. I'll bet that is as much or more than the amount of actual runs. But if we simply double the cost then we still come up with $220,000. Im guessing WJ's figures are correct.
AFCO, Rons Fuel Injection sponsored Dodge Challenger
Mention Street Lethal Motorsports
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Re: Did WJ really say ??? .....
[Re: Irun5snd8th]
#1534260
11/21/13 03:00 AM
11/21/13 03:00 AM
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Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
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Pro Stock camshafts are FAR more radical in intensity, opening/closing rates, etc., the spring controls more weight and peak rpm is over 1000rpm higher.....among other things.
Between R&D, test runs, qualifying and eliminations, I have no doubt the cost is in the 100s of 1000s for an entire season.
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