Ron LaDieu

Ok I have a line on a 4.8 out of a 99 chevy truck. It's a 2wd so I'm thinking of using the motor and trany and using the efi in my 68 nova. I would like to be in the 400hp with it how much work will it be to get thare ??

sawblade99Z

iTrader: (1)

400 at the crank or at the wheels?

Ron LaDieu

Wheels would be nice

sawblade99Z

iTrader: (1)

It'd take a pretty healthy heads/cam/intake package to hit that on a 4.8 I'd say. You've got a fairly significant cube disadvantage to the LS1, which typically falls around 450-470 rwhp with h/c/i. Unless you're planning on boosting it. Then disregard everything I said and slap a D1SC or something on it for an easy 400 rwhp.

Ron LaDieu

From what I find the 4.8 and 5.3 is 10hp different. What set up will I need to get 400 out of it

sawblade99Z

iTrader: (1)

The 4.8 to 5.3 stock hp difference is small, yes. But the more aggressive you get with mods, the bigger gains you would see with the 5.3 over the 4.8. The 4.8 has less stroke so you won't see gains in torque like you would with the 5.3. I only brought up the 5.7 numbers to give you an idea of what is realistic. That bigger bore, longer stroke motor averages in that 450-470 rwhp range with a quality top end on it. I think it will take nearly the same level of mods to get you to 400 out of a 4.8.

But to answer your question, it depends on if you want to be all motor or go with boost. You could buy a procharger kit and be there no problem. Or if you're after naturally aspirated power, you can add ported heads, a cam from one of the vendors here, and a Fast intake and you should be close. Either way you're looking at $5k in mods easily if you do it right.

Go to Texas Speed's website and poke around a little. They have pages and pages of heads and cams for you to look at. Call them up and they'll help you bulld and order a package that will work very well together.

Teddy-2000RS

A fuel system and the cx racing kit from ebay would put you at 4-500 on very little boost. You'd have 2.5-3k into it and you could make it on pretty much a stock engine.

Ron LaDieu

I have been looking at the cx single turbo kit.have you used thare kits I wasn't sher how good thay are

stock400whp

I cant comment on the cx kits quality but how is your fabrication skills?

if you can weld mild steel you can easily make a kit of your own. if you can weld aluminum youll be all set for aluminum coldside.
im using on3 76mm for about a year now 19psi on stock 5.3 works great. simple and cheap setup

Ron LaDieu

Weld..tig...steel aluminum no problem. I have never messed with turbos so that is all new to me

stock400whp

oh ok. in that case forget about any kits and build your own. plenty of budget parts that will get the job done.

im less than 1K in turbo parts in mine and running for almost a year now

Ron LaDieu

The kit I was looking at was 1k for a single set up

stock400whp

is this a complete kit/cold and hot side? if it is thats cheap.

when i say turbo parts i meant the following.
turbo,drain/feed,wastegate, cross over/exhuast manifold. 3" catback,
intercooler, piping, bov. and ofcourse things like couple/tbolt are included.

also check the success rate of that turbo. on3 sells 76mm for like $325 and really good success rate.

Stretchr

^this is what you should look into 100% homemade budget turbo, stock motor and give it hell