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zraffz · 07-11-2011, 11:56 PM

Well when winter rolls around I want to crack open the piggy bank and at least start building a motor... won't have it done for a while but I want to know what I should have budgeted to build it.

I'm looking for a low mileage LT1 that will just need to be lightly honed, don't want to waste extra money on boring the motor. I've never built a higher RPM motor, I've built a few with stock heads and mild cam/s but that's about it.

I'm not sure if the crank will hold up to my plans (so let me know), defiantly want to have splayed main caps though. I plan on running the stock crank or a comparable aftermarket casting, doing all new bearings and running some sort of 4340 rods and forged pistons (sit right around 11:1). Looking into Advanced Induction's 200cc heads and their 230/238 cam. I'm sure they'll match a valve train to my specifications. I would be having them port the intake manifold and obviously changing whatever I need to change (throttle body, injectors, tune).

AI claims the cam builds power to 6,300-6,400 RPM, I'd imagine it would hold power til about 6,700-6,800 RPM and would really sit high in the power band if it was spun to 6,900 RPM. I will have to double check on this but I'm sure on a stock CI motor it is more than capable.

Will the stock crank hold up to that kind of RPM? Obviously I'm not going to have this thing built very fast but I'd like to hear input. I figure even if I only set aside 15% of each pay check and go $1,000 out of pocket I could have the funding to gather all the parts within a year.

07-11-2011, 11:56 PM	#1
zraffz Join Date: Feb 2010 Location: Stillwater Posts: 822 iTrader: (2)	LT1 Build? Well when winter rolls around I want to crack open the piggy bank and at least start building a motor... won't have it done for a while but I want to know what I should have budgeted to build it. I'm looking for a low mileage LT1 that will just need to be lightly honed, don't want to waste extra money on boring the motor. I've never built a higher RPM motor, I've built a few with stock heads and mild cam/s but that's about it. I'm not sure if the crank will hold up to my plans (so let me know), defiantly want to have splayed main caps though. I plan on running the stock crank or a comparable aftermarket casting, doing all new bearings and running some sort of 4340 rods and forged pistons (sit right around 11:1). Looking into Advanced Induction's 200cc heads and their 230/238 cam. I'm sure they'll match a valve train to my specifications. I would be having them port the intake manifold and obviously changing whatever I need to change (throttle body, injectors, tune). AI claims the cam builds power to 6,300-6,400 RPM, I'd imagine it would hold power til about 6,700-6,800 RPM and would really sit high in the power band if it was spun to 6,900 RPM. I will have to double check on this but I'm sure on a stock CI motor it is more than capable. Will the stock crank hold up to that kind of RPM? Obviously I'm not going to have this thing built very fast but I'd like to hear input. I figure even if I only set aside 15% of each pay check and go $1,000 out of pocket I could have the funding to gather all the parts within a year.