stephenpen

Because I can't take another motor blowing up. It was a lot of work sorting out the new motor and installing the turbo kit. One engine failure is enough for me. I just want to drive the car.
Next year I'll crank it up to 16-18lbs.

Rkreigh

I had the same problem and yanked the factory stuff out and went with a nice straight shot lokar setup

it has a nice positive lock on the dipstick too which is nice.

chriswood

I bet pulling the plugs on that bank is a pain. Have any pics of the manifolds/crossover?

stephenpen

Believe it or not it's not that bad changing the plugs. The front cylinder is a pain to get the wire on but the plug comes out with a bit of patience.

C5Natie

Cool build. Something different. I usually see guys running the 5.3's till they blow since theyre a dime a dozen and cheap. Never seen a 4.8L build myself.

Still_Slow

I may have missed this but you have your ls2 243's on the 4.8?

stephenpen

Yep. Stock 4.8l bottom end, ls2 heads, turbo cam, and a fast intake.

Still_Slow

did you have any fitment issues, I had thought about using some 317's on a 4.8/5.3 but have been told it won't work because the bore sizes are different but looks like you have proved that wrong.

Rkreigh

the 4.8 motors are surprisingly strong. I bought a batch of them for next to nothing and am in process of building them up for 1k hp with forged internals the thick block walls and small bore make getting a high flowing head a bit of a challenge but making power is NOT a problem

the ls1 tech guys run "truck bombs" all the time and if there is an issue, you swap out a very low cost short block and keep on getting it

now I for one don't have the energy or desire to keep swapping motors on a modern vette (I have a tt C5 ttix) so I'll build mine for the HP level and then some for a bit of security

like to hear what you all are using for rods, pistons and cranks

so far I'm using a stock crank as the "short stroke" forged cranks cost even more than the stock stroke (custom is custom I guess)

so for now I'm going to run a 4.0 stroke and bore out to LS6 3.8 or so bore size

I'm not sure "how big" I should bore on the iron block and still have the strength I need

many advised NOT to go to the full 3.905 which is a shame because I have some nice pistons that size

what do you all think?

SloppyC6

i know most have already read or know about this but it never hurts to refresh peoples memory.... 1203 hp stock short block 4.8


http://www.hotrod.com/techarticles/h...g_bang_theory/

stephenpen

Most 4th gen 4.8s come with 243 heads stock.

Kerns

You are probably the highest hp and fastest 4.8L C6 in the world. Coincidentally, you are probably the slowest and lowest hp 4.8L C6 in the world as well.

MikeOC

Very interesting build. Any idea what the car weighs now?

stealslows13

now thats sick I would love to see some #s on this when you get on the rollers. everything bolt up pretty good with the 4.8 block?

stephenpen

Hahaha funny Guy

Yep everything bolted right up to the 4.8L block. You cant even tell if you look in the engine bay. If I did not mention it you would never notice.
The little 4.8 that could 600whp on only 10-11lbs of boost. Who would have thought. I'm very happy with me almost free shortblock

stealslows13

^ Impressive

FrankieD

Great results. Does it feel sluggish or any lag under 3500 rpm.

TT32VGT

pretty cool, but PLEASE take those z06 emblems off if the car isnt a z06

Kadorja

LSX ****** was pushing 750whp I believe out of a 4.8 with a F1 procharger and nitrous. Non intercooled. Eventually popped but it was ragged on hard and pretty often from what it looked like.

stephenpen

HAHAHA
Yes they are coming off. I bought the car like that. I'm looking for the Z51 emblems right now.
I sold my Forged LS7 TT setup to buy this car.