LSXFEIN

i just wnat to see if anybody can help me out with my project im trying to make my stock 348ci into a 408ci with low compression and a nice cam with a good Turbo setup! what kind of product should i use and whats a good set up! your help is greatly apperciated!! thank you!

6techniques

iTrader: (7)

wow buddy, you should do a search in the FI section as there are a metric butt ton of things you can do with the mighty LSx motors! good luck

what year/make/model vehicle do you own?

black98ws6ta

iTrader: (77)

To get a 408 out of an ls1 block you would have to have the block sleeved. It would be much smarter to get a ls2 block and go for a 402, or iron block if you arent worried about the weight. There are tons of different turbo kit's, which one might depend on your goals.

99Z28LS1

iTrader: (4)

Join Date: Dec 2008 Posts: 3

you can tell, he ask's a lot of questions in that year he's been on the site. Check the stickies bro, they'll help you a lot

LSXFEIN

Thanks for the response and help! i have a 2000/ Z28/ Automatic

LSXFEIN

I was thinking the same deal by going 408 iron because it can withstand alot more pressure and combustion! i dont think it would be that much heavier than a LSX. I wonder if it would be smarter to keep it N/A and go 408ciLSX High Compression?

6techniques

iTrader: (7)

well you definitely want to go into the proper section for it then. We only know FI in here!
What you should be asking is whats the best setup for your budget.

Denali08

What's your goal?

LSXFEIN

Sorry for the late response! Yes thats exactly what i would like too know *** well. Would it make a giagantic difference if i where to keep my original LS1 and leave it 348ci and just rebuild it with new bearings and rings and a good hone and put a T4/ST80? Or go with a 408ci with that turbo? would i see a dramatic change in the HP numbers?

DrTurbo

iTrader: (3)

Stock style cubes with a ST80 would be a animal for sure. Just look at some of the folks running the ST80.....9's @150+

MY99TAWS6

iTrader: (3)

If you stay stock block buy good rods and forged pistons, arp mains are good idea,rod bolts and head studs as well. Stock cranks are pretty strong.Stock pistons are weak, rod bolts are another weak link and stock rods are so so.
Or go iron block think its about 80 pounds heavier. I have lighter bmr kmember helps to offset weight of iron block but then my turbos, big intercooler,piping add back some weight.

bad6as

iTrader: (17)

your stock motor cant be a 408 you need a
6.0l iron block
callies -25cc pistons
callies rods
callies crank
tfs heads
9.0 to 1 compression
and a turbo with a turbine side over 80mm
in a light car it will go 8s