LSA connecting rods
10-31-2018, 06:02 AM
#1
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LSA connecting rods New to the site. What is the max RPM LSA rods are good to? Engine is an LSX 376 B15. It has a 3.622” stroke and LSX forged dished pistons. Thank you.
10-31-2018, 11:07 AM
#2
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How high do you plan on revving to?
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11-04-2018, 11:31 AM
#10
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Personally, I wouldn't push it harder. GM states a redline of 6600 for this engine, and I think it would be smart to respect that, if you want this engine to last. That's just my 2 cents.
Andrew
Andrew
11-04-2018, 09:50 PM
#12
Given that many stock bottom end LS motors have seen 7,500 rpm to 8,000 rpm and lived when the valve train is set up correctly, I would image the LSX 376 B15 would too.
The rod bolts in the older 2000 and back LS motors are weaker than the 01+ rod bolts.
The crate motor would definitely need valve train upgraded and likely a better cam to benefit from ~7,500 rpm.
The stress levels double going from 6,500 to 7,500 rpm roughly.
Luck also plays a factor but a good set up can reduce their risk
The rod bolts in the older 2000 and back LS motors are weaker than the 01+ rod bolts.
The crate motor would definitely need valve train upgraded and likely a better cam to benefit from ~7,500 rpm.
The stress levels double going from 6,500 to 7,500 rpm roughly.
Luck also plays a factor but a good set up can reduce their risk
11-05-2018, 09:52 AM
#14
Given that many stock bottom end LS motors have seen 7,500 rpm to 8,000 rpm and lived when the valve train is set up correctly, I would image the LSX 376 B15 would too.
The rod bolts in the older 2000 and back LS motors are weaker than the 01+ rod bolts.
The crate motor would definitely need valve train upgraded and likely a better cam to benefit from ~7,500 rpm.
The stress levels double going from 6,500 to 7,500 rpm roughly.
Luck also plays a factor but a good set up can reduce their risk
The rod bolts in the older 2000 and back LS motors are weaker than the 01+ rod bolts.
The crate motor would definitely need valve train upgraded and likely a better cam to benefit from ~7,500 rpm.
The stress levels double going from 6,500 to 7,500 rpm roughly.
Luck also plays a factor but a good set up can reduce their risk
11-05-2018, 12:54 PM
#17
So much conflicting info and opinions. If gm states (as written in an above post) that the redline is 6600rpm, what’s 400rpm? Not to mention, I’d like to point out the fact that engine redlines are usually mainly based on what the valvetrain can handle. Op, I would not mess with rod bolts because I think you’ll open a can of worms there. I’d leave the rods as is or lower your rpm requirements for now until you put some stronger rods in it. I don’t think an extra 400 rpm will hurt it. Just my .02