LT1-LT4 Modifications 1993-97 Gen II Small Block V8

How bad is it to drive at high RPM's all the time?

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Old 07-15-2011, 05:13 PM
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Default How bad is it to drive at high RPM's all the time?

Just out of curiosity, i have a nice motor we put together, but just about every time i drive it I take it up to 6800RPM from 1st - 5th gear and hold it at 6000 (150mph) on the freeway for a while. I noticed it's been starting to miss like crazy after doing that (maybe I need a new opti?). If I keep doing that a lot is there a good chance it's going to toast the motor?

When cruising I usually keep it at 2000rpm in 6th and I save the high RPM's for when I'm ripping on it. Sometimes I like to cruise thru town at 4000rpm for a while to hear the sound though..
Old 07-15-2011, 05:18 PM
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Originally Posted by ls2pontiac
Just out of curiosity, i have a nice motor we put together, but just about every time i drive it I take it up to 6800RPM from 1st - 5th gear and hold it at 6000 (150mph) on the freeway for a while. I noticed it's been starting to miss like crazy after doing that (maybe I need a new opti?). If I keep doing that a lot is there a good chance it's going to toast the motor?

When cruising I usually keep it at 2000rpm in 6th and I save the high RPM's for when I'm ripping on it. Sometimes I like to cruise thru town at 4000rpm for a while to hear the sound though..
if u dont want to mess something up, take it down a notch. the occasional spirited driving is ok but dont beat her up. its pretty self explanatory unless you wanted me to say...LET HER RIPPPPPPPP its fine
Old 07-15-2011, 05:24 PM
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dont run it unless, you c a mustang : ) lol
Old 07-15-2011, 05:31 PM
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it depends on if you have too much ignition lead and/or too much fuel. both can destroy an engine under that much load for an extended period of time. just in different ways.
Old 07-15-2011, 05:41 PM
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Unless you see something worth running and kicking its *** then dont beat your car up all the time
Old 07-15-2011, 06:42 PM
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Steve - SLOW DOWN.

Old 07-15-2011, 06:57 PM
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Im not sure what is worse for an extended period of time, 6k rpm or 150 mph...
Old 07-15-2011, 07:42 PM
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You really are putting a lot of heat into that motor when you are running it up to those speeds, if your cooling system isn't up to the task it will take some time when you slow down to cool off what you just spent heating up.
Old 07-15-2011, 07:44 PM
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Where are you located, Berlin? Where are you driving your car at '150 for a while?'. I'd be more concerned with losing my liscense than blowing my motor if I were you...lol
Old 07-15-2011, 10:05 PM
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^ no ****!

It really just depends how deep your pockets are and how much and what you have in your engine. If you have upgraded bottom end thats built to take the abuse and a upgraded oiling system, then do what you wanna do, your only wasting fuel
Old 07-15-2011, 10:09 PM
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I-75 I was moving at 155+ for a good while, had to test out the 5+miles of freshly paved road
Old 07-15-2011, 11:25 PM
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Originally Posted by whytryz28
I-75 I was moving at 155+ for a good while, had to test out the 5+miles of freshly paved road
WTF I hope you at least have upgraded your brakes. Just because you can go 150 doesn't mean you should on a public road. Honestly my car doesn't belong on the street and is a convertible so it isn't for the track either. I haven't had to run mine past 125 for anything, the fastest I go is usally on the onramps.

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Old 07-16-2011, 01:02 AM
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Originally Posted by ls2pontiac
. Sometimes I like to cruise thru town at 4000rpm for a while to hear the sound though..
are you serious? slow it down and cruise unless you see something worth running
Old 07-16-2011, 08:44 AM
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run it to 7k and see if you can hit 180 and hold it there, but with video proof... . . . . . . . . . .
Old 07-16-2011, 09:43 AM
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Originally Posted by ls2pontiac
5th gear and hold it at 6000 (150mph) on the freeway for a while.
the more rpms, the shorter the life but I bet you anything the 1st thing you blow up is your rear end. heat builds up fast at sustained high speeds and rears (especially10brokes) don't like heat. if you DO drive your car for long periods over 100 I'd fab up a diff cooler personally, if I ever make it out to nevada for the silver state national I'm def throwing one on. traveling from the border to boston(330mi) @ 145mph killed my posi and left the diff w/ a nice whine -but it still hasn't blown up!(knock on wood)
Old 07-16-2011, 12:11 PM
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Originally Posted by ls2pontiac
Just out of curiosity, i have a nice motor we put together, but just about every time i drive it I take it up to 6800RPM from 1st - 5th gear and hold it at 6000 (150mph) on the freeway for a while.
I am the only person that cant believe what Im reading?? Wow......
Old 07-18-2011, 12:11 PM
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LOL...I've had my car since 1997 and can count on one hand how many times been over 150....did hit the redline in 5th at 160MPH once on I-77 in Virginia just to say I buried the speedo....was young and stupid...the car was all over the road at that speed; one twitch of the wheel and you jump into the next lane. OP might want to slow your roll
Old 07-18-2011, 12:19 PM
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....Idk what to say.... I thought driving 90 everywhere on the freeway was bad enough but a sustained 150? Hell I've hit 135 but in a convertible with the top down it feels a little squirly. I can't imagine holding 150 on public roads for 5 miles...
Old 07-19-2011, 01:41 PM
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Originally Posted by ls2pontiac
Just out of curiosity, i have a nice motor we put together, but just about every time i drive it
What is the most likely end to this sentence? Maybe, "It begins to overheat at stoplights", or maybe "the clutch makes a grinding noise", or even " I have to get gas".

I take it up to 6800RPM from 1st - 5th gear and hold it at 6000 (150mph) on the freeway for a while.
Ive been here for a few years and this is really the dumbest thing Ive ever read. I just cant get over it.
Old 07-19-2011, 03:16 PM
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Originally Posted by moderate Z28
Ive been here for a few years and this is really the dumbest thing Ive ever read. I just cant get over it.
Maybe the OP is really 1craz28. Sounds like some of his wisdom.


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