LS7 rods in an LS1?
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
What I've been able to find out is the crank should fit. You will need to remove the reluctor and have a 24x reluctor fit. The piston pin diameter is .925" on the LS7 rods and .944 on the LS1 rods. You could get pistons to fit.
The resulting displacement would be ~383ci.
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It could probably be done, but why would you want to? The rods are around $400 ea to begin with, so if money is not the issue I'd think you'd be wasing your money putting those components into an LS1 block. I would just put that stuff into an LS7 block.
The resulting displacement would be ~383ci.
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It could probably be done, but why would you want to? The rods are around $400 ea to begin with, so if money is not the issue I'd think you'd be wasing your money putting those components into an LS1 block. I would just put that stuff into an LS7 block.
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
A very simple answer to your questions is 382.27 cubic inches.
But, you cannot use LS7 rods with LS1 pistons. Here is why:
The deck height on your LS1 block is 9.240 inches. The same is true for the LS7 block.
Your LS1 connecting rod length is 6.098 inches.
The LS7 Titanium connecting rod length is 6.064 inches.
Here is the formula for the components that come in a LS1 engine:
.................Engine Deck Height:**9.240 inches
............Connecting Rod Length: - 6.098 inches
...............1/2 of the LS1 Stroke: - 1.811 inches
...Piston Pin Center to Block Deck: 1.331 inches
Taking your LS1 piston, with its 1.331 inch pin centerline to deck distance and the LS7 connecting rod, with its 6.064 inch center distance, and the LS7 crank's 4.00 inch stroke divided by 2 = 2.00 inches, let's put this data in the formula:
..............Engine Deck Height:**9.240 inches
.........Connecting Rod Length: - 6.064 inches
............. 1/2 of the LS7 Stroke: 2.000 inches
Piston Pin Center to Block Deck: 1.176 inches
When you look at the Piston Pin Center to Deck Height for both packages, you see that the engine with the LS7 rod and crank want a piston with a pin centerline to deck measurement of 1.176 inches. Your LS1 piston's dimension is 1.331 inches.
That means if you were to try using your LS1 pistons with the LS7 rods and crank, your piston with stick 0.0135 inches above the block's deck. You could tolerate up to 0.015 inches above the block, but no more.
Sorry, but you will need a new set of pistons if you are going to use the LS7's rods and crank with your block.
Last edited by Pumba; Dec 18, 2007 at 05:44 PM.
they are awsome strong!
and.....rebuildable! woohoo!
