Weakest part of an LM7?
02-12-2012, 09:00 PM
#1
Weakest part of an LM7? I'm swapping an LM7 into my 93' 240SX and I'm wondering what the weakest link is? I have heard from many it is the rod bolts, so I plan on getting Katech's for it. I also already have a double roller chain, etc.
Anything else worth changing while the motor is on the stand?
Anything else worth changing while the motor is on the stand?
02-15-2012, 01:52 AM
#3
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How many miles on it? Wouldn't hurt to get new lifters and pushrods; while you are changing all that I would definitely get a new cam. Anyway that's what I did. You on silviav8?
02-15-2012, 05:11 PM
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You must have bought a good running engine and are wanting to make it stronger / last longer than if You put it in as is ,,,,,,,,,,I just saw a thread 3 or 4 days ago where a poster posted a graph showing stock and Melling oil pumps rpm and pressure and the stock pumps dropped off like a rock at 6500 rpm's and up and the Melling kept pumping higher and highr pressure to I believe it was 8000 rpm's . Rod bolts are weak only past like 6300 rpm's and /or 500whp ,,,,,,,or it's more risky ,,,,,,,,,the second design factory rod bolts are beefier and kind of resemble the Wave-Lock bolts .
