My LS1 is not a LS1
Thread Starter
Teching In
Joined: Jul 2010
Posts: 8
Likes: 0
My LS1 is not a LS1 OK, I bought a used LS1 out of a wrecked T/A. I could see it had 317 heads. I started tearing it down today and discovered the block is a 6.0L iron block. I know some people like these because you can bore them and get more CI. I was going to get a set of 243 heads and a LS6 intake for my LS1, don't know now. Any suggestions from all you gearheads out there. I am putting it in a classic truck-street rod, not a track car.
lol, you have the motor most people kill find on a budget. Its the budget boost motor of the century and the block and crank are responsible for many 9 sec cars 
hell the lq4 with rod bolts and springs has gone over 700whp
hell the lq4 with rod bolts and springs has gone over 700whp Trending Topics
The 243 heads flow about the same as the 317's... it would just increase your compression ratio with 243's. I would keep them and put in a mild cam and an ls6 intake... Run it as is.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Definitely the LQ9 with 10:1 compression ratio. Requires 92 Octane and weighs 416lbs. Produces 347 HP in stock form. 6.0 liter displacement
The LS1
Displacement = 5.7 L. / 346 CID
Bore x Stroke = 99mm x 92mm / 3.90" x 3.62"
Compression Ratio = 10.1:1
Horsepower = 335 HP @ 5,200 RPM (out of Fbody)
Weight is 425 lbs
Looks to me that the only downside to the block would be cooling efficiency. I know when I swapped in my LQ4 I had to go with a high flow water pump otherwise when idling in 90 plus heat the car would want to overheat. The heatsoak would cause problems without it. I swear I thought the Iron block was 90lbs heavier but GM says no. Odd to me.
The LS1
Displacement = 5.7 L. / 346 CID
Bore x Stroke = 99mm x 92mm / 3.90" x 3.62"
Compression Ratio = 10.1:1
Horsepower = 335 HP @ 5,200 RPM (out of Fbody)
Weight is 425 lbs
Looks to me that the only downside to the block would be cooling efficiency. I know when I swapped in my LQ4 I had to go with a high flow water pump otherwise when idling in 90 plus heat the car would want to overheat. The heatsoak would cause problems without it. I swear I thought the Iron block was 90lbs heavier but GM says no. Odd to me.
OK. Maybe i shouldve been more specific.
To the OP.
You went to the junk yard, or where ever to buy and LS1 from a wrecked car. what you got was a 6.0 motor. lol.
So you got more then what you bargained for.
is that better Zbinkley??
i was referring to the fact that he was after a 346ci motor with 241 heads and got a 364 ci motor with 317 heads.
so, with that said, IMO, he got more then what he was looking for.
i would be ecstatic to get one of those in place of an ls1
To the OP.
You went to the junk yard, or where ever to buy and LS1 from a wrecked car. what you got was a 6.0 motor. lol.
So you got more then what you bargained for.
is that better Zbinkley??
i was referring to the fact that he was after a 346ci motor with 241 heads and got a 364 ci motor with 317 heads.
so, with that said, IMO, he got more then what he was looking for.
i would be ecstatic to get one of those in place of an ls1
The 4.0" bore gives you much better head options. On a budget get some L92 heads and a L76/L92 intake and you have a great bang for the buck. They are more finicky about the cam than a cathedral head but the right combo will beat a budget cathedral setup everytime.... The increased compression of the LQ9 is a big bonus too. You lucked out my friend.....
So a 6.0 truck motor is worth more than an LS1? I would agree with your statement if it was maybe an LS2. I understand a lot use the iron 6.0 to make power with but from what I have read you can pick one up for a lot cheaper than an LS1. Depends on what he paid for it I guess.
So a 6.0 truck motor is worth more than an LS1? I would agree with your statement if it was maybe an LS2. I understand a lot use the iron 6.0 to make power with but from what I have read you can pick one up for a lot cheaper than an LS1. Depends on what he paid for it I guess.
i was thinking the same thing when i typed it. LS1s go for less then the LQ motors in my part. Atleast at my local LKQ.
i could pick up ls1 for around 800, but LQ4/9 go for around 1200 here.
I can get in Arizona a almost complete lq9 except for the intake in 600 it comes from ignition coils to oil pan i guess i should go and pick it up and the ls1 sell for 1200
The 4.0" bore gives you much better head options. On a budget get some L92 heads and a L76/L92 intake and you have a great bang for the buck. They are more finicky about the cam than a cathedral head but the right combo will beat a budget cathedral setup everytime.... The increased compression of the LQ9 is a big bonus too. You lucked out my friend.....