LS build options
LS build options I'm currently in the process of swapping an Ls2 into a 71 Chevelle.
Here's what I have, an ls2 with unknown miles that is currently disassembled for inspection at the machine shop. LS3 intake and l92 heads that have been shaved .010 with btr spring kit installed. My original plan was to run the ls2 with the ls3 heads and a custom cam. But I know that in the end I'd regret not doing more.
So now I'm debating on purchasing a new ls3 block along with forged rods and pistons, while using the crank and everything else from the LS2, to better fit the heads and intake that I have. Another option that I'm seriously considering is buying the dart sleeved block from Texas speed with a 4.125 bore and running that with a stock stroke.
I don't have a power goal in mind but I'd like the chevelle to be able to beat most modern muscle cars.
Here's what I have, an ls2 with unknown miles that is currently disassembled for inspection at the machine shop. LS3 intake and l92 heads that have been shaved .010 with btr spring kit installed. My original plan was to run the ls2 with the ls3 heads and a custom cam. But I know that in the end I'd regret not doing more.
So now I'm debating on purchasing a new ls3 block along with forged rods and pistons, while using the crank and everything else from the LS2, to better fit the heads and intake that I have. Another option that I'm seriously considering is buying the dart sleeved block from Texas speed with a 4.125 bore and running that with a stock stroke.
I don't have a power goal in mind but I'd like the chevelle to be able to beat most modern muscle cars.
Youll spend much less money with keeping and rebuilding what you have. I would take the ls2 out to 4.030.
Our complete rebuild kits are $699. Gets you everything but cam springs pr and lifters.
We can get you anything you need for peace of mind, but going in thousands of more dollars in the hole doesnt seem like as good idea as working with what you have!
Just our input though
Our complete rebuild kits are $699. Gets you everything but cam springs pr and lifters.
We can get you anything you need for peace of mind, but going in thousands of more dollars in the hole doesnt seem like as good idea as working with what you have!
Just our input though
Doing a 4.125 bore x 3.622 stroke is a 388. Very powerful motor. It likes RPM. Big Hammer built one in his TA, made 630 rwhp NA, ran 10.4@136 on a track that the surface was so bad, they had to close the track and repave.
So, given the list of options you posted, there's my answer.
So, given the list of options you posted, there's my answer.
9 Second Club
Joined: Feb 2004
Posts: 818
Likes: 215
From: VA
That 388 is a piece of work. I knew a guy who made 539 with a 346 as well so that ls2 bore is plenty capable of being a nice piece. Got to have a goal in mind to know where you want to finish. If you want an average build ws6 tech can help you out for cost effective everyday power goals for sure.
We can help you get very serious also. Having a firm goal in mind is really the first step. Budget is 2nd. Then stay on track. We have some pretty good builds from last year that make impressive track times as well that arent money pits as well.
I'm aiming for 450 to 500 to at the wheels, but I'd like the option to go bigger down the road. I'm thinking about the 388 route more as it's not that much more expensive than building an ls3. I'd rather not bore the ls2 block .030 because that would limit it's use in the future. But I'm curious as to what comes in the 699 rebuild kit, I'm having a hard time finding it on your site.
9 Second Club
Joined: Feb 2004
Posts: 818
Likes: 215
From: VA
I made 475/473 with a bolt on ls3. It doesn’t take heads and cam to make that kind of power. Good thing about doing a serious bolt on set up is when you decide to pull the trigger you have all the supporting mods in place. My 2015 1LE went 11.5@120 at 3900 pounds race weight.
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10 Second Club
Joined: May 2009
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From: over dere
I'm currently in the process of swapping an Ls2 into a 71 Chevelle.
Here's what I have, an ls2 with unknown miles that is currently disassembled for inspection at the machine shop. LS3 intake and l92 heads that have been shaved .010 with btr spring kit installed. My original plan was to run the ls2 with the ls3 heads and a custom cam. But I know that in the end I'd regret not doing more.
So now I'm debating on purchasing a new ls3 block along with forged rods and pistons, while using the crank and everything else from the LS2, to better fit the heads and intake that I have. Another option that I'm seriously considering is buying the dart sleeved block from Texas speed with a 4.125 bore and running that with a stock stroke.
I don't have a power goal in mind but I'd like the chevelle to be able to beat most modern muscle cars.
Here's what I have, an ls2 with unknown miles that is currently disassembled for inspection at the machine shop. LS3 intake and l92 heads that have been shaved .010 with btr spring kit installed. My original plan was to run the ls2 with the ls3 heads and a custom cam. But I know that in the end I'd regret not doing more.
So now I'm debating on purchasing a new ls3 block along with forged rods and pistons, while using the crank and everything else from the LS2, to better fit the heads and intake that I have. Another option that I'm seriously considering is buying the dart sleeved block from Texas speed with a 4.125 bore and running that with a stock stroke.
I don't have a power goal in mind but I'd like the chevelle to be able to beat most modern muscle cars.
Take that ls2 block out to 4.030 or more. Use the ls3 heads. Put a good rod and piston in it. Get a mid length runner fast intake. 11.5:1 compressions or so. Call Cam motion and get a custom Cam ground to shift around 7500+. It will rip ****
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10 Second Club
Joined: May 2009
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From: over dere
Doing a 4.125 bore x 3.622 stroke is a 388. Very powerful motor. It likes RPM. Big Hammer built one in his TA, made 630 rwhp NA, ran 10.4@136 on a track that the surface was so bad, they had to close the track and repave.
So, given the list of options you posted, there's my answer.
So, given the list of options you posted, there's my answer.
:blush:
I made 475/473 with a bolt on ls3. It doesn’t take heads and cam to make that kind of power. Good thing about doing a serious bolt on set up is when you decide to pull the trigger you have all the supporting mods in place. My 2015 1LE went 11.5@120 at 3900 pounds race weight.
It seems like a decent alternative would be running the ls2 .030 over. Does anybody have any recommendations for a piston that clears the ls3 valves that would give me decent compression. It looks like mahle and diamond both make 2cc dome piston that would get me 10.6 on a stock ls3 head.
Given the same stock heads and cam, the striker would make more torque and hit peak power earlier. The stock stroke will rev higher and hit peak power later. They would make quite similar peak HP numbers, but tq would heavily favor the stroker.
It seems like a decent alternative would be running the ls2 .030 over. Does anybody have any recommendations for a piston that clears the ls3 valves that would give me decent compression. It looks like mahle and diamond both make 2cc dome piston that would get me 10.6 on a stock ls3 head.
It was an honest 500 horse setup that ran out strong.
Jenner Black Chevelle Hi Lawre, Brody ran my ECU-882C in his Black 65 Chevelle when it had the BBC N/A engine.
You will need an Engine Control Unit, with software for calibration, a great price is given to LS-1 Tech members. (my ECU I hope)
MY Method could be MORE cost effective :
HONE your LS-2 to 4.007" AND fit my 4.1" Forged Crankshaft, Forged "H" beam rods, Forged Pistons, Steel Rings AND balanced for $1850.00, a LS 413.
The second choice if you want a LS-482 is the use a RHS Tall Deck Block and a 4.5" crankshaft.
The cost of a "sleeve block" vs RHS block is greater though many other items are included saving some money.
What is your projected cost to meet your needs ?
Lance
You will need an Engine Control Unit, with software for calibration, a great price is given to LS-1 Tech members. (my ECU I hope)
MY Method could be MORE cost effective :
HONE your LS-2 to 4.007" AND fit my 4.1" Forged Crankshaft, Forged "H" beam rods, Forged Pistons, Steel Rings AND balanced for $1850.00, a LS 413.
The second choice if you want a LS-482 is the use a RHS Tall Deck Block and a 4.5" crankshaft.
The cost of a "sleeve block" vs RHS block is greater though many other items are included saving some money.
What is your projected cost to meet your needs ?
Lance
Thanks, I've read your build threads, my car is also a 71 that I converted to a 70. I took a lot of ideas from your original build. I see that you wanted more after the ls2 with the ls3 top end. Did you ever take the car to the track before you upgraded the engine?
LS Core Shift Hi Lawre, I have inspected/observed LS-2 Crankcase "core shift" with sleeves NOT centered at the deck position.
GM STATES not to bore LS cases in MANY manuals.
TAKE to time to Sonic Test before increasing the bore size.
Lance
GM STATES not to bore LS cases in MANY manuals.
TAKE to time to Sonic Test before increasing the bore size.
Lance
I've been reading about this, I'm thinking about getting the block sonic tested. But I think that I'll be better off in the long run with the sleeved block, plus that'll leave room for plenty upgrades in the future?