danbap

iTrader: (6)

with all the talk about 5.3l I'm starting to think about one of these instead of a 6.0l but i don't want to be disappointed. but at less then 1/2 the cost of a 6.0 they are looking better and better. its going to be a carb'd setup with meth/water injection with a D1SC. what kind of power has people made with the 5.3l with a procharger? i don't know much about 5.3l but are there stroker cranks for a decent price? with the saving of buying a 5.3 a stroker crank seems like it would fit the budget. along with of course forged pistons and rods. are the stock heads on the 5.3 any good? or would it be wise to get some 317's? also i would like to be around 550rwhp through a th400. is that even a likely goal with a 5.3?

thanks,
Dan.

NemeSS

iTrader: (127)

not familiar with search feature yet huh?

danbap

iTrader: (6)

i did search but it wasn't really giving me any info i wanted sorry. ill try again.

1BAD_LS1

iTrader: (36)

yes the 5.3 is a really good budget boost motor... I made 528hp 491tq with slipping 4l60E.

havent dynod since the th400 swap but i bet its over 600...

its a cheap build 5.3, 317 heads, 02 ls6 cam, diy front mount turbo.... real cheap build that performs like a champ!

danbap

iTrader: (6)

was it forged?

also all i find is info on turbo 5.3's but none on procharged ones.

danbap

iTrader: (6)

ive been doing alot more searching i think im going to go with a 5.3l.

are the stock heads on a 5.3l any good? what about getting a pair of 317's?

what is a good size to bore a 5.3l out to?

1BAD_LS1

iTrader: (36)

alot of us guys have been pushing 550rwhp+ with our stock shortblock 5.3's for quite a while... I beat the hell out of mine evertime i drive it, I do 20-30 WOT pulles every week and run it hard everywhere i drive. I have hundreds of pulls on this motor. Besides if it blows its only another $400 and your beating on it again! I have got more than my money of fun out of my little 5.3 LMAO!

317's drop compression to 8.5:1 and flow the same as 243's... alot better than the 5.3 heads..

if your going boost on a budget heres what you do:

5.3
317 heads
Good valve springs
mls gaskets
arp head bolts
02+ ls6 cam
hardened 7.425 pushrods

+

10-16psi boost

=

550rwhp+++ WITH NO METH!!!!

98Camarod

iTrader: (43)

Keep in mind that the th400 has more rotating mass so it eats up more power

danbap

iTrader: (6)

sounds nice. thanks for the help/info

thats on ALL stock short blocks?

well i allready have meth injection sitting in the garage from a previous truck. so can the 317s be milled to bring back the compression to about 9 to 1 or 9.5:1 ?

also you said ls6 cam is that cam that good for boost? im going to be carbed would that cam still be a good choice?

what would be better to use a th400 or a 350?

383mazda

iTrader: (2)

got to bumb this back up top cause there needs to be a good 5.3L boost build...

I'm doing the same in an rx7... turbo'd, not supercharged. I believe most people go that route cause they can get 10lbs of boost cheaper with a turbo. ($550 for a power masters 70mm turbo, plus a few hundred more in BOV's, WG's and turbo plumbing, unless you can do exhaust yourself vs. $2300+ D1SC supercharger...) You are using a carb thoughwhich is a whole other can of worms with turbo's

Here's what I'd like to know though... You can hit the limit of the rods and pistons on stock heads... so why upgrade to the 317's? Higher compression and smaller runenrs equals faster response on the street, right? Sure the 317's flow better, but turbo's aren't that picky when it comes to port runner size, and increasing the size and dropping the compressoin from ~9.5 to 8.6:1 will be noticed down low. Bigger is better for NA applications, but not always necesary for boostest motors...

So if you can hit 600hp with stock heads, and 600hp with 317's, why switch? (this discussion assumes stock internals...)

TheFallen

milling 317s for boost will hurt you, it will make the deck too thin and will be easier to lift the heads. NA milling stock heads are fine, for boost i like to keep as much material on the head as possible.

danbap

iTrader: (6)

i want to go turbo also but i already have the d1sc so im going with it. 600hp im guessing you are talking at the crank. so you dont think its possible to hit 500-550rwhp with a stock short block? i know the procharger is going to eat up some hp. and it sounds unless i go aftermarket swapping heads istn't a good idea.

1BAD_LS1

iTrader: (36)

people have hit over 800hp to the wheels on a stock shortblock 5.3!!!! lol, i need to go re-dyno mine, since i made 528hp with the slipping tranny letting go around 5500 at 14psi... now im running a th400 that may rob a few horses but im running 16psi and its not slipping! hoping for 600rwhp+++ Ill have to get to the dyno to know for sure though

The answer to running the 317 heads is because they flow better yes but the main reason is the ability to run more boost on pump gas and not worry about detonation. on a 5.3 that will put you at 8.5:1 compression but with the right setup you dont need to worry about lag, lol.

I am running 91 octane and 16psi with just an intercooler... dont have to worry about meth.

For as budget as my setup is its pretty nasty.

1BAD_LS1

iTrader: (36)

I have a BUDGET 5.3 turbo build thread....

I run a master power t70/.96ar at 16psi seen them run at 22psi

317's allow you to run pump gas and not worry about detonation, they also flow better... not worrying about meth is nice.

you can hit 600hp with stock heads yes... but dont think about doing it without meth or race gas.

1989k1500

iTrader: (23)

Heres a stock 5.3. It has nothing but valve springs and an LS6 cam. Made 681/712 to the tires just the way it is in the video. 80e trans, 9.5" rear end, 35 inch tires, 20 inch wheels.

http://www.youtube.com/watch?v=sPzUhQE6iH4

danbap

iTrader: (6)

1bad ls1 i thank you once again your build is a very big influence for me. i have meth/water injection already so im not worried about that as for money. is there another good flowing "cheap" head out there that wont lower the compression? i just dont seeing a 8.5:1 engine being very fun and with a blower i do have to be up in the rpms before it starts making power. and im stuck with the D1sc right now i want to go turbo but this is what i have soooo.... i have to make it work

1BAD_LS1

iTrader: (36)

Yes you are right on the lower compression with the D1sc... wouldn't go below 9:1 IMHO...

Honestly on your setup man since you already have meth I would just run the stock heads...

get an 02+ ls6 cam, good springs, hardened pushrods, 60# injectors, walbro fuel pump...

and for some more insurance: timing chain, ported oil pump, second walbro

then drive it like you stole it! lol

06colorado

iTrader: (4)

Im like you the budget cheap 5.3 sounds alot better than the 6.0

1_bad94Camaro

iTrader: (15)

I'm spending a pretty penny on my twin turbo 6.0 build.

danbap

iTrader: (6)

everything sounds good besides the 60# injectors its going to be a blowthrough carb set up!

what is the stock compression ratio of a 5.3 i keep finding 2 different answers?