lewroe

iTrader: (2)

So my friend and I have been discussing a budget 5.3 build.

Would 30 over 305 sbc pistons work in a 4.8 third gen with 6" rods?

pistons and rods are way cheaper this way.......

dirt track racer 81

iTrader: (45)

i dont think id try it..i dont know the specs on either but their might be a problem with pin heights with the rods and all..

SS_bnoon_SS

iTrader: (3)

Get the block bored to 99mm (stock LS1 bore) and use stock LS1 pistons. If you're on a REALLY tight budget, used LS1 pistons pop up on EBay from time to time from people going to a stroker crank and pistons. Use the stock 5.3 rods or use the LS1 rods and poof, budget 5.7L build.

lewroe

iTrader: (2)

I should have made it more clear, sorry, I'm boosting this motor so thats why I need forged internals.

I'm familiar with the 5.7 pistons and stuff but I'm wanting a high hp budget build.

If someone will help put some brain power to this it may turn out to be a budget way to go forged....

Keith

Whats the compression height on the forged .030" over 305 pistons?

With a 6" rod and the 4.8L's 3.268" crank, you would need a compression height of: 1.606" to end up at the 9.24" LSx deck height.

lewroe

iTrader: (2)

Thats what I'm talkin about!

This is what i found:

Compression Distance (in): 1.560 in.

Is that possible to work with? and I thought lsx pistons came up beyond the deck?

1slow01Z71

iTrader: (36)

MOst LSx pistons are .008 out of the hole. You are sitll going to be way in the hole, if you do use those then you are going to a really shitty combustion chamber. Wait and save some money and build it right.

lewroe

iTrader: (2)

how much can you take off the block?

kbracing96

iTrader: (26)

I think SDPC has some budget forged flat top LS1 pistons. You could use those with 72cc 317 heads and the thickest head gaskets you can get. Would probably give ya a decent budget forged FI motor.

lewroe

iTrader: (2)

good idea but it's still $500 bones, I can do forged rods and pistons for that if this will work.

can I take .04 off the block?