Anyone gone this route? I am wondering if the block would hold up better than a LS1 block for a boost application?

 

they are iron aren't they?

 

yes they are

 

I know they add about 75 pounds but just wondering if the iron block is a stronger platform for a boost motor?

 

i assum so

 

A friend of mine ran a 5.3L block bored out to make it a 347. I think WCCH and a guy named Rex had their hands on it. He ran it in his GMC Sierra with a Radix(?) blower. It ran real good before he sold it, he just kept breaking trannys.

 

A guy on the turbo forums made over 1000rwhp on a 346 cubed 5.3 block.

 

thats what im talkin about! Not saying it cant be done on a aluminum lsx motor but this block is solid. Iron 6 bolt main block.. come on now. Thats also why i sold my lt1 and bought a 5.3. I have a feeling there gonna be the new "swap engine", not because there better then a ls1 but because you can make incrediable power on a motor you can pick up complete for $500 all day long!

 

There are several guys over on Perfomancetrucks.net, the sister site to here that have gone this route. It makes a very strong platform. I was gonna go that route with my 4.8 and a 5.3 crank till I found a smoking deal on a low mile LS1 short block.

BTW, The 5.3 is out made but 3 to 1 then any other LSx type motor

 

So would you have to sleave the block or just bore it?

 

huhhhhhhh??

 

There are 3 5.3 for every 1 5.7 LS1's.

 

thats what i was thinking but i can see that.

 

Just bore it.