Stock block or lsx block
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On The Tree
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Stock block or lsx block Hey ls guys! I'm debating whether I should go stock or aftermarket block. I'm going turbo and I want to throw 30# at it with a 94mm. If I go stock the motor will be a lq4 408 studs top and bottom no filling the of the block. I would love to go that route if the stock block will hold. Of course the lsx block will do it the motor I would be is 427 destroked to a 400. Has anyone had a stock block hold to that amount of boost and still survive with everything intact lol? Give me good advice and opinions. Thanks
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So its going to be a 408, 427, and a 400?
4" stroke on a stock block is a bad idea with that much boost.
Have you ever done anything like this before or are you just throwing out random numbers? What is your power/ET goal?
4" stroke on a stock block is a bad idea with that much boost.
Have you ever done anything like this before or are you just throwing out random numbers? What is your power/ET goal?
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From: Ohio
Like I said, 4" stroke on a stock 6.0 block isn't the best idea with that much power.
Unless your car weighs 3600 lbs, you're not going to need 30 PSI to run a 5.0. There are a few guys running 5.20s-5.30s on a stock bottom end 5.3/6.0 at 26-30 PSI. You should be able to run in the 4.90 range with ease with 400+ cubes and that much boost in a 3200 lb car.
Unless your car weighs 3600 lbs, you're not going to need 30 PSI to run a 5.0. There are a few guys running 5.20s-5.30s on a stock bottom end 5.3/6.0 at 26-30 PSI. You should be able to run in the 4.90 range with ease with 400+ cubes and that much boost in a 3200 lb car.
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On The Tree
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Ok so go 370? The only weight taken off the car will be tubular k member and rear hatch deck lid. It's an 3rd gen camaro. If I go that route is there a possibility of lifting the heads? You have a valid good point in reference to stock bottom end cars
If its in the budget, I would go with the LSX block with that much power in mind. The iron is a lot harder, the bores are siamesed, and you get doweled billet main caps. If you're going to go with a 4" stroke, a full counterweight crank will be a smart idea as well.
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On The Tree
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Ok. Cool. I'm going with a big bore short stroke turbo build with the lsx block. 370 stock block since Joe Nova gave me a heads up on the stock stuff. I just hope I don't lift the heads lol Guess it's a coin toss. Thanks both of you guys.
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Verdad Gallardo Restricted User
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From: Ohio
You can have the block and heads drilled for 1/2" studs.
Guys like Urban and Bryson have made 1400+ on 4 bolt heads. Bryson did it on a stock 5.3. There are a few other approaching that area now too. I think Jarrett is still running 4 bolt heads and he made 1200whp last year. I think he has upgraded his turbo since then. I just seen his stock 6.0 block spin its way down the quarter to a 173 mph trap on poor prep (1.6x 60 ft).
Guys like Urban and Bryson have made 1400+ on 4 bolt heads. Bryson did it on a stock 5.3. There are a few other approaching that area now too. I think Jarrett is still running 4 bolt heads and he made 1200whp last year. I think he has upgraded his turbo since then. I just seen his stock 6.0 block spin its way down the quarter to a 173 mph trap on poor prep (1.6x 60 ft).
Thread Starter
On The Tree
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C'mon Joe Nova! That's insane. Now my question to you since they used the stock block were they filled as well? I'd like to see that and grab as much info as possible. What you think about this combo for a 6.0 block 4.030x 3.750 stroke?
Personally I would vote for the LSX block and destroked 427. You'll be able to rev a bit better and ride the gears longer and less valve shrouding. Both should make it faster than a 408
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As far as I know, Bryson was the only one running a filled block. Was either quarter or half filled aluminum 5.3 block. Stock rotating assembly and heads, Chinese 7/16 head studs. Ran 4.8x 1/8th in a 3400 lb Fox.
There aren't too many guys here actually running a filled iron block, mostly aluminum. I don't remember Urban running one. There were a couple of filled aluminum LS2 blocks running ~1800 HP. I'm not sure whatever happened to them. I haven't seen either of them on these forums in a while.
There aren't too many guys here actually running a filled iron block, mostly aluminum. I don't remember Urban running one. There were a couple of filled aluminum LS2 blocks running ~1800 HP. I'm not sure whatever happened to them. I haven't seen either of them on these forums in a while.
As far as I know, Bryson was the only one running a filled block. Was either quarter or half filled aluminum 5.3 block. Stock rotating assembly and heads, Chinese 7/16 head studs. Ran 4.8x 1/8th in a 3400 lb Fox.
There aren't too many guys here actually running a filled iron block, mostly aluminum. I don't remember Urban running one. There were a couple of filled aluminum LS2 blocks running ~1800 HP. I'm not sure whatever happened to them. I haven't seen either of them on these forums in a while.
There aren't too many guys here actually running a filled iron block, mostly aluminum. I don't remember Urban running one. There were a couple of filled aluminum LS2 blocks running ~1800 HP. I'm not sure whatever happened to them. I haven't seen either of them on these forums in a while.
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LSX Iron anything over ~ 18 lbs of boost for any longevity.
Just because people have done 20+ on factory iron blocks
Does not mean it should be done.
Just my .02
Just because people have done 20+ on factory iron blocks
Does not mean it should be done.
Just my .02
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From: Ohio
Restricted User
Joined: Mar 2014
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Likes: 109
From: Ohio
