Jesus Lopez

So my engine finally took a dump last weekend. I was running a stock bottom end ls1 with ported 241's, trex v2 cam, NX wet shot on 92 fast intake. On that set up we pushed 390 whp on motor and 490 on 100 shot on a mustang Dyno.

I'm not a fan of spending lots money on my car so I'm looking into buying a 5.3 short block to use with my same top end. (Budget build)

I did searching but couldn't find what I was looking for.
I know these engines have lower compression and was wondering what type of head gaskets and thickness I should go with?
I would like to squeeze 200 if possible.

What gaskets should I use with my ported 241's?

Using my 242/248 cam
92mm fast
1.7 rockers

BlueMagicSS

iTrader: (4)

You're going to lose compression with the 241 heads on the 5.3 Block either way.

Jesus Lopez

I'm aware if losing compression but how or what can I do to try and bump it back up??

Anyone else?

87silverbullet

iTrader: (11)

Just run a .040 gasket instead. You will have to check for ptv though.

Jesus Lopez

Thanks for the help. I'll have a buddy check it for me since I don't know how.

kelsey_canard

iTrader: (6)

Maybe you could throw some 4.8 flat tops in there if its not a gen IV block.

Jesus Lopez

Thanks for your feedback!
I'm trying to spend the least possible. Found a 5.3 for $500

Jesus Lopez

A buddy mentioned LS9 head gaskets.

What do you guys think?

1884benz

Shave the heads, and put 4.8l pistons on your 5.3 rods. im currently building a budget motor for my 240sx. im using 862 heads and the compression should be around 10.5:1. that ratio is debatable though, ive seen a lot of argueing on here about that subject.