How High Is It Safe To Spin Motor??
How High Is It Safe To Spin Motor?? How high would it be safe to spin a stock bottom end LS1??
I'm trying to get down my setup and where I'd like to cross the lights at RPM wise, so I need to know this.
car is a totally stock bottom end 346 LS1.
Wasn't sure where to put this post, so if its in the wrong section, sorry moderators <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Sean
A.R.T 98 Z28-Silver
2002 Durango SLT-Silver
I'm trying to get down my setup and where I'd like to cross the lights at RPM wise, so I need to know this.
car is a totally stock bottom end 346 LS1.
Wasn't sure where to put this post, so if its in the wrong section, sorry moderators <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Sean
A.R.T 98 Z28-Silver
2002 Durango SLT-Silver
Re: How High Is It Safe To Spin Motor?? Thanks for the replies.
I figured it was somewhere in the 6800-6900 range.
Anyone else got any input on this, things to watch out for, etc when high revving..
I figured it was somewhere in the 6800-6900 range.
Anyone else got any input on this, things to watch out for, etc when high revving..
Re: How High Is It Safe To Spin Motor?? There are lot of folks out there buzzing their setups to 6500-6600 rpms.
I'd would go no higher than 6800 rpms as well.
I'd run the oil a little over. LS1's have an oil system like the LT5, the oil first goes to the cylinder heads. So I like to run a bit over, as much as 1/2 a quart over. I don't think we are likely see any cavitation from running too much oil, plus with our factory pcv systems, you can end up using 1/2 a quart after 20 passes at the track.
I'd give serious consideration to running a heavier weight oil or a higher quality oil if you are trying to avoid needing to pull the motor at the end of the racing season.
Locally the motors that have come apart have had stretched rod bolts.
I am running 10w40, 1/2 over, and the car sees 6600 rpms every time I drive it.
I'd would go no higher than 6800 rpms as well.
I'd run the oil a little over. LS1's have an oil system like the LT5, the oil first goes to the cylinder heads. So I like to run a bit over, as much as 1/2 a quart over. I don't think we are likely see any cavitation from running too much oil, plus with our factory pcv systems, you can end up using 1/2 a quart after 20 passes at the track.
I'd give serious consideration to running a heavier weight oil or a higher quality oil if you are trying to avoid needing to pull the motor at the end of the racing season.
Locally the motors that have come apart have had stretched rod bolts.
I am running 10w40, 1/2 over, and the car sees 6600 rpms every time I drive it.
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
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From: Chi-Town, IL
Re: How High Is It Safe To Spin Motor?? I spin mine to 6500 most of the time, thats where I peak in the powerband...I use mobil 1 synthetic 5w30 and always watch the oil, I try to keep it full as much as I can...the motor current has 11,000 miles on it, and from here on out its only going to get beat on harder, I think I will have enough $$ then by the time it takes a dump.. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
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Re: How High Is It Safe To Spin Motor?? Stock short block, I would not go over 6600. You can get plenty fast and still shift at 6500/6600 rpm. Just pick the cam to meet those needs.