rod bolts for 6500 rpm?
The following users liked this post:
Homer_Simpson (12-05-2021)
#4
The following users liked this post:
Homer_Simpson (12-05-2021)
#5
10 Second Club
iTrader: (18)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
My buddy along with many other people have spun the earlier yrs to 6500+ without issue. His rev limit was actually set to 6800.
I spun my 02 to 7100 quite a bit testing shift rpms before settling on a rev limit of 6950. It never batted an eye.
So I wouldn't worry one bit with a 6500 rev limit as long as you have the proper valve train. Meaning don't raise it if you have stock springs. It would be pointless anyhow as the stock cam flat lines at ~5500.
I spun my 02 to 7100 quite a bit testing shift rpms before settling on a rev limit of 6950. It never batted an eye.
So I wouldn't worry one bit with a 6500 rev limit as long as you have the proper valve train. Meaning don't raise it if you have stock springs. It would be pointless anyhow as the stock cam flat lines at ~5500.
#7
Teching In
Join Date: Jan 2011
Location: Coventry, Ct
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I just put a new crankshaft and bearings in a friends 98 LS1. Three rods spun bearings, but didn't damange the rods. The kid beats the car within an inch of its life and I don't think he has a rev limiter. I installed arp rod bolts and would do the same if you have you engine out. Cheap insurance.
Trending Topics
#14
TECH Fanatic
Join Date: Feb 2004
Location: Lexington, KY
Posts: 1,259
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
The factory bolts are not very strong compared to higher grade fasteners. The failure usually results in a spun bearing. My assumption is that when this happens the bolts stretch/flex just enough to allow the bearing to spin. I think it is extremely rare for them to come loose or actually break.
#15
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
If torqued with the right lubricant and an accurate torque wrench the bolts won't come loose. Rpm kills rod bolts and connecting rods because the force the connecting rods and rod bolts have to withstand increases at a much faster rate than the rpm. So while an engine might run just fine at 6900rpm, it might not like 7100rpm at all. Also fatigue limits of materials means that a rod bolt may only last for so long at a certain level, even if you don't increase the rpm. This isn't to limit rpm concerns to just rods and rod bolts, it applies to nearly every part of the engine. Piston pins, pistons, etc.
#19
Launching!
Join Date: Mar 2009
Location: Melbourne, Australia
Posts: 281
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
If torqued with the right lubricant and an accurate torque wrench the bolts won't come loose. Rpm kills rod bolts and connecting rods because the force the connecting rods and rod bolts have to withstand increases at a much faster rate than the rpm. So while an engine might run just fine at 6900rpm, it might not like 7100rpm at all. Also fatigue limits of materials means that a rod bolt may only last for so long at a certain level, even if you don't increase the rpm. This isn't to limit rpm concerns to just rods and rod bolts, it applies to nearly every part of the engine. Piston pins, pistons, etc.
Sounds like most people dont have a problem with the stock bolts anyway, but if the engine is apart replaced the bolts