Boring the LSX block
Boring the LSX block Boring the LSX block to 4.25" bore. Is that exactly safe? In terms of your engine breaking, and everythine else. If not, in your opinion what would be the biggest you would go to get the most ci?
Edit: All motor, no power adder.[SIZE=3]
Edit: All motor, no power adder.[SIZE=3]
Last edited by Gordon0652; May 11, 2007 at 10:57 PM.
The most common piston size in that area is 4.185"
At the moment pistons and rings in larger bore sizes are custom. For that application should you choose Diamond pistons you would have to go with an inboard forged piston.
Just a heads up.
4.185 bore, 4.100 crank make you 451ci, able to use more shelf stock parts.
At the moment pistons and rings in larger bore sizes are custom. For that application should you choose Diamond pistons you would have to go with an inboard forged piston.
Just a heads up.
4.185 bore, 4.100 crank make you 451ci, able to use more shelf stock parts.
I wouldn't do it, at least not on the first go round. You'd only be leaving .150" of material between the bores, and while that may be enough for a solid N/A set-up, I wouldn't trust it under high boost or nitrous. Not to mention, if something goes wrong and you need to pull it apart, hone/re-ring etc., you'll be SOL.
Originally Posted by Gordon0652
Cant squeez any more safely?
TECH Veteran
Joined: Dec 2001
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From: Ft. Lauderdale, FL, USA
Originally Posted by Beast96Z
If I had one, I'd go 4.200' on the first round and no longer than a 4.125 stroke. You'd be looking at a safe 454.
Beast96Z,
Aren't you doing 4.185 bore x 4.125 stroke??? 454ci
Gordon0652,
Listen to these guys, there's no reason to have a ticking time bomb or an engine block you may have to throw away if you have a problem and have to rebuild it. Even if you go 4.250 bore and 4.125 stroke, you'll just have a 468ci. Thats only 14 cubes more than the 454 and at approximately 1-1.5 hp per cubic inch, you're only giving up about 14-21 hp. Not worth it.
Do a 454ci, you'll be one happy bastard with ~650 RWHP N/A and nice idle quality.
And my goal is also 700 RWHP, but I just don't think its gonna happen on pump gas and with a rather tame street car with 12:1 cr. 650 will happen, I'm confident.
.
Last edited by Quickin; May 12, 2007 at 12:24 PM.
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ok, it sounds like the 454 is going to be it, i have talked to engine builders today, and they agree with some of you, they like the 454 idea. Where can i get 4.185 pistons thoe? Diamond doesnt sale them.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
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Verdad Gallardo TECH Veteran
Joined: Dec 2001
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From: Ft. Lauderdale, FL, USA
Originally Posted by Gordon0652
ok, it sounds like the 454 is going to be it, i have talked to engine builders today, and they agree with some of you, they like the 454 idea. Where can i get 4.185 pistons thoe? Diamond doesnt sale them.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
If they don't offer that....DO NOT USE THEM...PERIOD.
Tall deck is great, and if you're gonna spend money for an LSX super-stroker, than you'll have the money for the custom headers you'll need to have with the tall deck, and any other custom made part. So it isn't a big deal, don't that petty stuff stop ya.
Go for it man.
.
Last edited by Quickin; May 12, 2007 at 01:30 PM.
Originally Posted by Quickin
That would be a 457ci. I'm doing 454 with a 4.185 bore and 4.125 stroke.
Beast96Z,
Aren't you doing 4.185 bore x 4.125 stroke??? 454ci
Beast96Z,
Aren't you doing 4.185 bore x 4.125 stroke??? 454ci
As for my motor, it's a 4.155" bore x 4.185" stroke. I was looking for the most hp/tq in a usable range. That's why i went with the longer stroke. TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by Beast96Z
Yea, i knew it was more, I just didn't take the time to punch it in. As for my motor, it's a 4.155" bore x 4.185" stroke. I was looking for the most hp/tq in a usable range. That's why i went with the longer stroke.
As for my motor, it's a 4.155" bore x 4.185" stroke. I was looking for the most hp/tq in a usable range. That's why i went with the longer stroke.Whats your opinion on the difference the Harrop would do compared to the Wilson or Hogan sheet metal intake? I don;t think I want to **** with the Harrop, seems like a pain in the ***.
.
Originally Posted by Quickin
Whats up with your build? Do you have you Harrop yet?
Whats your opinion on the difference the Harrop would do compared to the Wilson or Hogan sheet metal intake? I don;t think I want to **** with the Harrop, seems like a pain in the ***.
.
Whats your opinion on the difference the Harrop would do compared to the Wilson or Hogan sheet metal intake? I don;t think I want to **** with the Harrop, seems like a pain in the ***.
.
I'd still like to see some results for the Wilson Billet intake. It's been lingering in the back of my mind if this Harrop things dosen't work out for some reason. I like the fact that it has longer runners, but I wouldn't buy one until I saw some results. As for your more traditional sheet metals, I'm not a fan. As always, they put up good big end numbers at the sacrifice of low to midrange power. It's completly out of the realm of my project. I want my motor to be done by 7k, and a traditional sheet metal would just be getting good. I hope the Harrop isn't as much trouble as people think there gunna be. If my 8 filter idea works, it should be a drop in.
Originally Posted by Gordon0652
ok, it sounds like the 454 is going to be it, i have talked to engine builders today, and they agree with some of you, they like the 454 idea. Where can i get 4.185 pistons thoe? Diamond doesnt sale them.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
There is a nother option, tall deck, a 495ci 4.185 x 4.50 or a 484ci 4.185 x 4.40.
Originally Posted by WMSuperSport
Give Erik at HK Racing engines a call. He'll have the most knowlege of anyone about building something extreme and reliable, like what you want.
HKRacingEngines.com
Wes
HKRacingEngines.com
Wes