skull

we are basically running the same setups haha this should be fun.

ly6 (l33 with a 58 tooth wheel)
317 heads
stage 2 boost cam
holley high ram
s475 til i upgrade to a billet 80 mm in the spring. figure i would get in some base numbers for the upgrade

slow ride

What fuel would you guys be running most of the time? 317's and a 5.3 really drop the compression, but that's probably good on straight pump gas.

skull

I'm running 93 and M1 (100% meth) will be my 700-800 tuning. But at the end of summer imma see what it'll make. So I'm going to go e85 and meth. So if it'll make over 900-1000

jimbos'ss

How hard have you pushed yours so far? The internals look incredibly stout compared to the gen 3 stuff. I weighed a piston and rod combo, 24 grams heavier.

I run e85. When I finally get to swapping in a tr6060, I'm plan to beat on this motor pretty hard.

skull

Haven't yet. Getting it all put together in the next month. Should have base numbers in a few months

jimbos'ss

Ok, post up your results if you beat me to completion. I'm hoping to have the short block done in a few weeks.

skull

sounds good

Rkreigh

do you all think the alum 5.3 or 4.8 block with a close to stock bore would life on corn and hold up at 900 at the tire.

I've been debated the iron vs alum and my machinest isn't too impressed with the alum blocks but I really hate to add the weight as my suspension is setup nice!!

slow ride

I THINK all (or most) of the 5.3 AL blocks have the same sleeve OD as a AL 5.7 so it's really thick. Guys actually will bore a 5.3 to a 5.7 in some cases which is like .180" over. I can't see any other factory bore engine being stronger in the sleeve area except a iron 5.3 which can also be bored to 5.7. I love the idea of having a block with a lot of clean up room for the future, but I don't want the smaller displacement.

C5 Pete

I would think it would. I also think the concern would be keeping the heads on, not really the block..

There are many LS1/6 blocks holding up to 900 at the wheels, and the 5.3 block has stronger sleeves.

jimbos'ss

Pushing water is my biggest concern on this build. I think that's far more likely than splitting a sleeve. The picture sucks, but you can see how thick they are.

schpenxel

Wow, those are thick

cmiller8006

The sleeves are not usually that thick all the way down, my cobalt sleeves were only like that for a 1/4 inch.

jimbos'ss

You are correct, but they still have the added difference between the 5.3 and 5.7 bore all the way down.

justbrad

so is this the cheap alternative to building a new motor waiting on machine shop and worrying that everything was done right a running junkyard motor my datr heads and my maggie this is all new to me so forgive if im wrong but **** things look real affordable now

schpenxel

Yup, you should see what some of the LS1Tech guys get out of these things. Open the ring gaps up some, slap them back together, put some decent head studs in and turn the boost up until they blow.

I saw an article where they got about 1000rwhp out of one and the turbos they were using ran out of steam. Engine was still fine... though that was on a dyno, not quite real world, but still..

cmiller8006

True.

jimbos'ss

Still waiting on the crank to come back from balancing so I've been meticulously cleaning everything.
Unfortunately they need to add some Mallory slugs to the crank and there wasn't any on hand.

skull

yesterday someone went 8.22 at 160 with a stock bottom end 5.3 leaving off the line with 25# of boost. he i probably running upwards of 30# on a s475 but ya. there is a few 5.3 out there making north of 1000 wheel hp

jimbos'ss

We had a local 240sx pushing over a grand, unfortunately he popped it at drag week.