7.0L Development Motor!
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From: Marion, VA
Originally Posted by Lead Head
What is high RPMs defined? 5k, 6k, 13k?
NASCAR engines are 358 cubic inch V8s. They seem to have a limit of around 9,000 RPMs before they drop valves and explode. Indycar engines are much smaller but have far more horsepower because they are turning in the low teens (13,000-14,000?). But the small displacement has little torque and have to be running very fast to produce the horsepower.
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From: Las Vegas
Originally Posted by osbornk
It depends on the engine. If you have big pistons, they can't reverse directions quickly and high RPMS might be 5,000 where with a small piston, high RPMS may be 14,000.
NASCAR engines are 358 cubic inch V8s. They seem to have a limit of around 9,000 RPMs before they drop valves and explode. Indycar engines are much smaller but have far more horsepower because they are turning in the low teens (13,000-14,000?). But the small displacement has little torque and have to be running very fast to produce the horsepower.
NASCAR engines are 358 cubic inch V8s. They seem to have a limit of around 9,000 RPMs before they drop valves and explode. Indycar engines are much smaller but have far more horsepower because they are turning in the low teens (13,000-14,000?). But the small displacement has little torque and have to be running very fast to produce the horsepower.
Actually length of stroke (and valvetrain stability, like you said) affect RPM more than piston size.
Shorter stroke motors can safely rev much higher than longer stroke motors.
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Actual on the Nascar comment.... Nascar has now regulated everything drivetrain wise because of DEI. Gear ratio, tranny ratio, everything. DEI a few year ago, was running I think 10800 or something and holding it together for a 500 mile race, the result was significantly more hp at the restrictor plate races and the ability to run a different rearend gear to take advantage of the high revs. Nascar told DEI that turning an engine that high was unsafe due to the chance of it blowing up and causing a wreck. To which, DEI stated that they had been running this setup for a year and a half, and that they hadn't lost a motor yet to that particular design.
There is more technology out there then you have money for, I promise.
BTW to update you more on GM stuff, (LOL) we have successfully (for now
) turned a STOCK duramax 4468 on rpms underload pulling a sled.......that is a STOCK diesel mind you with nothing but programming. No tricks. No jokes. No drugs. LOL
There is more technology out there then you have money for, I promise.
BTW to update you more on GM stuff, (LOL) we have successfully (for now
) turned a STOCK duramax 4468 on rpms underload pulling a sled.......that is a STOCK diesel mind you with nothing but programming. No tricks. No jokes. No drugs. LOL
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From: PA
BTW to update you more on GM stuff, (LOL) we have successfully (for now ) turned a STOCK duramax 4468 on rpms underload pulling a sled.......that is a STOCK diesel mind you with nothing but programming. No tricks. No jokes. No drugs. LOL[/QUOTE]
Saw a vid on youtube where a puller was trunin a detroit 12V71 diesel at 5500 rpm, and that is a BIG diesel. Pretty cool stuff though.
) turned a STOCK duramax 4468 on rpms underload pulling a sled.......that is a STOCK diesel mind you with nothing but programming. No tricks. No jokes. No drugs. LOL[/QUOTE]Saw a vid on youtube where a puller was trunin a detroit 12V71 diesel at 5500 rpm, and that is a BIG diesel. Pretty cool stuff though.
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From: Marion, VA
Originally Posted by duramaximizer
. DEI a few year ago, was running I think 10800 or something and holding it together for a 500 mile race, the result was significantly more hp at the restrictor plate races and the ability to run a different rearend gear to take advantage of the high revs. Nascar told DEI that turning an engine that high was unsafe due to the chance of it blowing up and causing a wreck. To which, DEI stated that they had been running this setup for a year and a half, and that they hadn't lost a motor yet to that particular design.
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From: Melbourne, Aus
To get completely off-topic, do a search on youtube for "Bandag Bullet", a vehicle that attends shows in my area - 2 92 series Detroits that run 4000rpms.
Fastest OTR truck in the world...
Fastest OTR truck in the world...
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A bunch blew today. Holy cow. I think they were RCR cars correct? I don't watch much Nascar just happened to hear the announcer talking, I just breifly watched it. It is too much like the IROC series of the past for me. It was cool for a race, but not a season of it.
On Edit, ya some of those big trucks are sweet. We have talked about building a motor for next years truck pulls with hopes of turning 6500rpms under load. IDK though, the stress is amazing on a diesel at those rpms.
On Edit, ya some of those big trucks are sweet. We have talked about building a motor for next years truck pulls with hopes of turning 6500rpms under load. IDK though, the stress is amazing on a diesel at those rpms.
Last edited by duramaximizer; Oct 7, 2007 at 09:09 PM.
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From: Melbourne, Aus
Originally Posted by RocketScience
Off topic for a moment (Fred)...
So where the heck has NumberDummy been???
The dude went from like 29 posts a day, to NO posts in the last three weeks?.........freaky.
Bill, are you and your manuals out there.........?
So where the heck has NumberDummy been???
The dude went from like 29 posts a day, to NO posts in the last three weeks?.........freaky.
Bill, are you and your manuals out there.........?
Originally Posted by NumberDummy
Computer crashed 8/29...it took 3 trips to HP warranty repair station to get the D thing repaired. P/C finally repaired 10/07. Bottom line...stay away from laptop p/c's!
My apologies to all those who are waiting for email answers.
My apologies to all those who are waiting for email answers.
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Originally Posted by 67stumppuller
I thought numberdummy eloped to canada with smiggs!!!!!!!!!!!!! Some sort of broke back canada thingamajig!!!!!!!!!!
Nice try though.
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From: Marion, VA
Originally Posted by thorseshoeing
[/i]Not to start an argument or anything, but a laptop is the only kind of computer I would own...
Tim
Tim
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From: Melbourne, Aus
DOHC, someone is learning from your tricks!
You sure it wasn't 48effie, or even 4x4 '54 that went along too???
Originally Posted by 67stumppuller
I thought numberdummy eloped to canada with smiggs!!!!!!!!!!!!! Some sort of broke back canada thingamajig!!!!!!!!!!
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From: Las Vegas
Originally Posted by FTE Fred
DOHC, someone is learning from your tricks!
You sure it wasn't 48effie, or even 4x4 '54 that went along too???
You sure it wasn't 48effie, or even 4x4 '54 that went along too???
Those pesky IP addresses!!
Some people just can't stay away!!
Last edited by DOHCmarauder; Oct 9, 2007 at 09:32 PM.
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Originally Posted by FTE Fred
You sure it wasn't 48effie, or even 4x4 '54 that went along too???