Kmaroman

iTrader: (1)

My in-law, and his friend are going to put together a turbo truck for the mud boggs but on a budget.

Since I know how to use the internet best, I wanted to get some ideas on this. I think where going to use an ls base motor, but they want to keep the bottom end stock. How much horse is possible on an ls1 or a 5.3, with a stock bottom end.

Is it easier to switch to carb or stay fuel injected. Can anyone tell me some common mistakes people forget to think about. It's going to go into a c/k series truck. Overall a mudd bog run is only about 200ft or more im not quite sure, but it will be wide open the whole time. They want to get 800fwhp out of it an 8-10psi boost, but from what i understand boost is a measure of air before it gets into the intake? So you can really make a **** load of boost an it really doesn't mean anything?

Thanxs for any help

1989k1500

iTrader: (23)

They arent going to get 800fwhp with 10psi on a stock 5.3 or ls1.

Id stick with efi for the tuning ease with the turbo. Just buy a stand alone harness to run the motor.

gametech

iTrader: (1)

With some luck, a stock 5.3L might get 500 at 10#'s of boost, not 800. For quick spool on a 200ft run, the turbo will probably need to be undersized, so it may take even more boost.

98Z28MASS

iTrader: (6)

No stock bottom end lsx engine is going to hold together at 800 hp for any extended period of time. If your going to use a stock bottom end engine id say go ls2 or lq4 6.0 liter. The lq4 truck block also comes with the 317 heads that are good for boost. Should be able to hit over 500 whp with 8-10 psi. If you want 800 hp on 10 psi then your going to need a massive cubed engine.

El_Diablo

iTrader: (9)

a couple of things to think about. Is the truck straight axle front end or IFS? The half-shafts will stand NO chance against that much power. You're going to need a stout drivetrain. Also, thiink about the placement of the turbo...get it wrong and you're sucking water/mud into everything.

Kmaroman

iTrader: (1)

i'd of told them that, but they'd think i was talking ****. So ill just wait till the block is scattered

Kmaroman

iTrader: (1)

its a straight axle truck they can build mudd bogging trucks no doubt. It just the first venture into turbo territory, and already know any input i put in won't do much cause my in-law caN BE VERY STUBBORN. So close to hitting his friend who use to be a teacher, who simply in the nicest way possible said i was dumb, i was about to say thank god i never had you, hoping he would say why, I'd of responded cause i would of popped you in the face

1989k1500

iTrader: (23)

Dadkins on here has a few thousand miles with a ton of dyno pulls and a couple dozen 1/4 passes putting 825+ to the tires with a stock lq9.

For a mud truck Id just push it until it broke then put in another junkyard motor and do it again.

99345hp

That motor should need more bottom end torque that high rpm horsepower right? Wouldn't this truck run better with a roots or twin screw supercharger on it?

Sideways240sx

iTrader: (22)

I would opt for the lq9 motor was well. Little more cubes, and strong iron block, a litttle lower compression.

Should be able to do 600-650 whp on a 76 mm turbo @ 10 psi.


Chris

r.barn

Its not the block or even the crank. But the stock rods are definitely
suspect at 800fwhp. I believe the LQ9 has the strongest stock rods.
LQ4 would be a little better for boost with its lower compression though.

A 6.0L truck engine with a Z06 cam swap and about 12-15psi
should hit your wanted power levels of 650rwhp.

1989k1500

iTrader: (23)

no, in mud you have very little traction, you just want all kinds of wheel speed so you need something that wants to rev high.

98Z28MASS

iTrader: (6)

True, ive seen a few builds that have pushed the limits of the stock short block, but seriously without the perfect tune, tons of fuel, and enough octane a majority of the time a stock shortblock is going to last long past 600rwhp nevermind 800 rwhp. The ones who have are well experienced and kudos to them but unless they are having it built by a pro I wouldnt use a few outliers whom have had a stock shortblock survive at those levels be representative of what a stock shortblock can handle.

1989k1500

iTrader: (23)

Yea I wouldnt push something I had to rely on like that. But for a mud truck or a car thats just a toy I wouldnt care. Just my $.02

98Z28MASS

iTrader: (6)

I hear ya, id do the same too if it were just a toy. Just depends on how reliable they want the truck to be. Still though its pretty amazing seeing people push the stock lq9's to those power levels and have them survive for a sufficient amount of time, shows what a great builder and tuner can do.

98Camarod

iTrader: (43)

As far as mud boggin, wouldn't you need a a2w IC also? Thats quite a bit more money. I'd think the mud would clog the a2a IC so it wouldn't perform well.