slimtastic

iTrader: (2)

hello all, im fresh into the ls motor scene and am looking to put a vortech 5300 into my older buick regal and boost it with a moderetly sized 76 mm turbo. needless to say ive got alot of research to do but id like to ask a couple quick questions.

now this will be a budget build for the most part, so id like to keep the stock bottom end and if possible swap most of the accessorys adn intake from a ls1... is this possible on a 5.3?

i know the stroke is same as a stock ls1, but the bore is much smaller... my question is can a set of stock ls1 heads be fit and ran safely on a smaller bore 5.3 without valve shrouding issues?

ideally id like to keep the smaller bore for now to facilitate holding boost and keep cylinder wall flex under power to a minimum.....but whats the safest bore possible in a vortech 5.3 iron block?

since im walking out of the "turbo buick" world of 7 years and into the "turbo ls" world, ill prolly have alot of dumb rookie questions.....

blk/slvr02ss

iTrader: (21)

I would use a ls-6 intake off a newer ls-1 (01-02).The 5.3 has a small CC chamber so most guys put them on the LS-1.W/ LS-1 heads on a 5.3 you would lower your compression so i would leave what you have on there.You can bore a 5.3 to a 5.7 and you would have a LS-1 iron block but i don't know how much more you can go.

slimtastic

iTrader: (2)

well id much rather have more air flow from the stock ls1 heads and a lower compression near/in the high 8 to 1, cause i will be running a turbo. any idea of the airflow difference from a stock 5.3 head to a ls1 head?

SOMbitch

iTrader: (8)

The stock LS1 and and LM7 surprisingly flow just a few cfm within each other. Both in high 220's IIRC. the 5.3 head chambers are 61.15cc and the ls1 66 & change.

Better yet all you need to know is right here>>>http://www.smokemup.com/tech/ls1.php

slimtastic

iTrader: (2)

you sombitch! thats quite the helpfull link. thankyou sir