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Nytemare

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Nytemare Senior Enthusiast

Nytemare

Posted
Posted

I am looking to build a 4.8L for turbo application.

I cant find anything in the usual places (Jegs or Summit) for rotating assembly. Looking for forged crank H/I beam rods and forged or hyper pistons.

 

I know I can probably get away with stock internals up to about 14psi, but I may want to go higher. So I would like to have the parts in there just in case.

 

 

Drop me some links if you guys know any...Thanks.

AK FiveO Enthusiast

AK FiveO

Posted
Posted
I am looking to build a 4.8L (will be a 5.4L) for turbo application.

I cant find anything in the usual places (Jegs or Summit) for rotating assembly. Looking for forged crank H/I beam rods and forged or hyper pistons.

 

I know I can probably get away with stock internals up to about 14psi, but I may want to go higher. So I would like to have the parts in there just in case.

 

 

Drop me some links if you guys know any...Thanks.

 

I'm certainly not an expert on small-block gm motors (more of a Ford engine builder) ...but it seems to me the 4.8L probably gets left out of the "mainstream" when it comes to cranks/rods/pistons and the like. Probably would be better to use the 5.3L block tor a build like that. Seems to be alot more available for the 5.3L ...maybe even the 6.0??

Nytemare Senior Enthusiast

Nytemare

Posted
  • Author
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well the plan is to use a 5.3 Aluminum block, and 4.8L rotating assembly with dish pistons...want an 8-8.5:1 CR

 

the pistons are the same in both engines its only the crank and rods that make a 5.3 what it is. Its only a few mm in difference in stroke.

 

But I want the shorter stroke so it revs better.

 

Problem is I cant find pistons or anything for a 5.3 or 6.0L either.

 

I did find a 427 stroker kit on SLP's website, but its a high comp kit. I dont know if I could get some Low CR pistons...cause a 7.0L turbo would be hella cool.

AK FiveO Enthusiast

AK FiveO

Posted
Posted

What about a 383 Stroker? That seems to be an extremely popular GM performance motor. I would think there would be a pretty versitile line-up of pistons/cranks/cams for that block. I'd imagine that 383 could be a pretty sweet revver on boost!

Nytemare Senior Enthusiast

Nytemare

Posted
  • Author
Posted
What about a 383 Stroker? That seems to be an extremely popular GM performance motor. I would think there would be a pretty versitile line-up of pistons/cranks/cams for that block. I'd imagine that 383 could be a pretty sweet revver on boost!

Want to stay with the LS-style engine.

I really haven't seen anyone build a 6.3L LS motor yet...so I doubt there is anything available for a 383 LS

 

You would think that with the amount of these LS engines on the road...for the last 10-12 years, you would think they would have an aftermarket like a SBC. The 5.7L has a tonne of parts...too bad they stopped making it in like 02.

 

I know the stuff is out there...there have been loads of people build truck engines in the magazines.

Nytemare Senior Enthusiast

Nytemare

Posted
  • Author
Posted

So I found out that the LS blocks are all pretty much the same, and the truck engines can be bored out to accept 5.7L pistons...or 6.0L pistons

Even as far as making a 427 (7.0L) out of a 4.8L is possible.

 

There is a lot of options open now.

 

So I will probably build an iron block 5.7L.

 

Now I need 3 things;

Time, used engine block, and most importantly....Time

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