Im curious if you HAD to choose between an Alternate fire cam or New stock gm crank in an engine build which one would it be. I know some people are going to say BOTH, but i want to know what you'd do if you HAD to choose between the two.
If you HAD to choose??
- Thread starter The Kansan
- Start date
I had a brand new GM LB7 crank that lasted 5k miles with a stock cam and broke. I've got an AF cam with a 80k LBZ crank that has around 15k miles on this build with more power and abuse than the LB7 saw.
I would choose to do it right the first time and do both and not regret my decision later on down the road.
I went with an af cam and a new lml crank. You can find them at a pretty reasonable price. I wouldn't skimp out but to answer the question I'd say crank.
Its not whether i can afford them both or not bc i have a new lb7 crank and a wagler af cam on the way. For some reason the new lml crank i had would not fit in the lb7 block i have and would have to have quite a bit of material taken off to clear. I was just curious what people would choose if they HAD to choose one.
Guess you're looking at 1000+ hp build?
Crankshaft..
I'd be looking at Callie's 4340 or 4330 crankshaft or banks big journal crank/rod setup if available to public
I haven't been on the up n up with big builds.. last I knew AF camshaft is not sure bet..
Changing a firing pattern in a used crankshaft sounds like trouble
Crankshaft..
I'd be looking at Callie's 4340 or 4330 crankshaft or banks big journal crank/rod setup if available to public
I haven't been on the up n up with big builds.. last I knew AF camshaft is not sure bet..
Changing a firing pattern in a used crankshaft sounds like trouble
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I know that a callies crank is out of my budget. AF cam i know is not sure thing but with a new crank it can hopefully only help. HP numbers i really dont have a goal just want a solid good running truck.
Since when does torque down low break crankshafts? Mine broke cruising down the highway under basically no load at all and no boost. It is harmonics.
You have a Vvt & I bet it was broke way before that. 60k on my motor and 110k on my cousins motor. No AF cams. His LB7 crank came out of a 330,000 mile towing service truck, mine has 178k. Both big singles that don't make power until 3k. No oval bowl pistons either. I don't ride the hype train.
Haha the hype train and Oval bowls shouldn't be put together. I had 4 cracked delipped LB7 pistons after 5k miles of over 1000hp. Cast Ovals are well proven to stand big power. Mahle cast are proven to crack under 1000 over and over again.
Just because your two motors didn't break cranks doesn't mean there isn't an issue. If you drove drunk all the time but never crashed would you think DUIs were just hype?