LS7 - Boost Build
Thread Starter
Pro
Joined: Oct 2013
Posts: 520
Likes: 31
From: Austin, TX
LS7 - Boost Build
Need some advice on what I'm missing goal is about 650-700 rwhp, I want to make sure the short block is solid, only want to do this once.
- original block
- darton dry sleeves pressed in
- callies compstar h beams
- callies compstar crank
- weisco pistons with steel wristpins
do I need to worry about the new rotating assembly being heavier, piston slap, what am I missing?
- original block
- darton dry sleeves pressed in
- callies compstar h beams
- callies compstar crank
- weisco pistons with steel wristpins
do I need to worry about the new rotating assembly being heavier, piston slap, what am I missing?
Thread Starter
Pro
Joined: Oct 2013
Posts: 520
Likes: 31
From: Austin, TX
Really at 650-700rwhp range? I mean 1000hp+ I could see but my stock crank would need to be rebalanced and worked over, plus the rod bearing failure ate into it a bit.
Drifting
Joined: Jun 2016
Posts: 1,291
Likes: 222
From: Temecula, CA
I just did drop in CP pistons (10:1) on my LS7 and had the rotating assembly balanced with stock crank/rods. I'm sitting at 750 whp on 91 + meth. If 650-700 is your goal, you should be fine with what you have planned and it may be a little excessive, if you don't plan to push it harder.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Thread Starter
Pro
Joined: Oct 2013
Posts: 520
Likes: 31
From: Austin, TX
I just did drop in CP pistons (10:1) on my LS7 and had the rotating assembly balanced with stock crank/rods. I'm sitting at 750 whp on 91 + meth. If 650-700 is your goal, you should be fine with what you have planned and it may be a little excessive, if you don't plan to push it harder.
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,341
From: Gilbert AZ
Personally I would pay extra for a better crank/rods. Small difference now to never worry.
Need to decide on ring pack. Builder should be able to guide that.
Of course you have to worry about balancer/slap/clearances. Not sure what you are asking there.
ARP mains or stock? Would need to get the motor machined with the appropriate hardware.
Need to decide on ring pack. Builder should be able to guide that.
Of course you have to worry about balancer/slap/clearances. Not sure what you are asking there.
ARP mains or stock? Would need to get the motor machined with the appropriate hardware.
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Thread Starter
Pro
Joined: Oct 2013
Posts: 520
Likes: 31
From: Austin, TX
Personally I would pay extra for a better crank/rods. Small difference now to never worry.
Need to decide on ring pack. Builder should be able to guide that.
Of course you have to worry about balancer/slap/clearances. Not sure what you are asking there.
ARP mains or stock? Would need to get the motor machined with the appropriate hardware.
Need to decide on ring pack. Builder should be able to guide that.
Of course you have to worry about balancer/slap/clearances. Not sure what you are asking there.
ARP mains or stock? Would need to get the motor machined with the appropriate hardware.
Now the question is really do I need to change the heads I had that were ported, new guides, dual springs, and stainless exhaust valves put in..
Thread Starter
Pro
Joined: Oct 2013
Posts: 520
Likes: 31
From: Austin, TX
