Bobsmyuncle

iTrader: (32)

It won't be done for the dyno day I don't think. I just finished up all the customer turbo Kits at the moment, so I am just now starting on my kit

Ryans99ls1

iTrader: (16)

I can only image the sound of 30psi through a 5.3.. thatd be nuts. What turbo are you thinking about? Youll need something fairly large thats still somewhat efficient at that level. But because of that i feel like it will automatically be pretty damn laggy unless you run a spool valve..

my fuel pumps came back friday, got a startup tune from brian at DTM last week. As soon as i can catch a break at school ill head home to wrap it up.. if all seems good(no leaks) then ill schedule a tune for mid May.

Silver T

What are the best factory heads to run on a boosted 5.3? Whatever I choose will get a mild port job.
My build will be like the op's. Plan on an 88. I bet one can make more power with an 88 on a smaller cubed engine. That's why I am using the 5.3 versus the 6.0.

Bobsmyuncle

iTrader: (32)

I have a gt47-88, 6" inlet, t6, 3.5" comp outlet, 5" downpipe. 1.08a/r, race cover. Rated for 1600hp. It will b latch, I know, but I'm hoping the rossler 400 and Neal chance converter will keep it lit.

I have the 862 heads now silver t. But I have to go to a aftermarket casting. I am looking at the new edelbrocks. They're only 1,079$ from tsp and they say they have a 5/8" deck

Ryans99ls1

iTrader: (16)

Ahh yeah i forgot about being auto too. itll gonna lag at first but youll be set once it finally gets going. Good luck man

66vert

iTrader: (3)

I'd also like to hear more from guys with built up 5.3's. How bout it?

boss79z

iTrader: (1)

Who has forged rotating assemblies in a 5.3? I am curious to hear about these setups and the power they are making. I saw calspeed has rotating assemblies for 2k

Bobsmyuncle

iTrader: (32)

Yea, if u keep stock crank in it, ur looking t 500$ for rods and 500$ for pistons. Plus the little things obviously, but cheap neverless.

BMF_Racing

iTrader: (6)

Not too many chiming in on there builds. Come on 5.3 guys...

I will post my buddies 5.3 setup we recently did.


All stock 2001 LM7 5.3 (unless noted ... its stock)

Engine:

60lb injectors
Arp rod bolts
LS9 head gaskets
re-gapped stock rings to .030"ish
head studs
'02 zo6 cam
PRC dual spring
moly push rods
2 bar map
King bearings (rod main)

Turbo:
PTE 74mm
JGS 50mm WG
50mm BOV
ebay from mount
Snow meth kit/ 93 octane

Th350 and 8.8 rear (3.08's)


DynoJet Dynoed 554whp & 574wtq @ 12 psi (eddy brake was not working and would only spool 12psi) -- runs 15 to 16 psi on the street. (Guessing somewhere in the 6's whp @ 15to16psi).


No track time yet. But it feels really strong. (3000lbs - '87 S10 Blazer)

a4ls2goat

This is irrelevant, but I think its crazy on the price of arp headstuds considering how much you can get a 5.3 for.

Anyone using arp headbolts on high boost?

black06g85

iTrader: (6)

mine isn't finished yet, but motor is going together next week,
stock rods, pistons, crank (01 lm7)
arp head studs, main studs, rod bolts.
gt4788 1.10 a/r t4 3.5" downpipe
317 heads
slp oil pump and billet timing gear
02 z06 cam (yellow springs for now)
0.030" ring gap stock rings
105lb/hr injectors and some E85 should do the trick'
currently waiting on a 99 pcm and a 3 bar map to finish this thing up.

SCIV

iTrader: (7)

Forged 365 kicked the bucket, so in went an '04 5.3 with 160k+ miles.

New parts: Melling oil pump, ARP rod bolts & head studs, LS9 cam & head gaskets.

Old parts: 317's w/PRC dual extremes, TBSS intake, GT-91mm front mount, Magnafuel pump, ID2000 injectors (E85). 5.3 just got rings gapped, and cleaned up. Original bearings, rods, pistons & crank...you get the idea.


The 365 pushed my '68 C10 to 141 mph in 1/4 @ 3,850# race weight breaking loose outta da hole. Around 21-22 psi.

Fast forward to 5.3 install, and didn't adjust tune, saw 20psi. That sumbitch pulls hard. Hard as the 6.0, no. Damn close? Yes. Close enough that I probably won't build another shortblock, when 5.3's are $250. Might switch to an aluminum block just to save weight.

Lag with the 6.0 was none. With the 5.3, very slight. Backed it down to 17 psi to get the weight transfer dialed in, and will be starting soon to tune up to 23-25 psi.

66vert

iTrader: (3)

Anyone have personal experience with a cast crank and forged rods plus pistons? How much abuse will the stock crank take. I hear conservative is 550hp max?! If you can say otherwise, how much and how long (miles)

1fast bird

iTrader: (22)

Most stock stroke guys are running the stock crank. Some well into the 1000 rear wheel horsepower range. They seem to take a ton of abuse before bending......

Chicago TDP

iTrader: (3)

I'm getting ready to pull out a 4.8L motor that has had gallons of E85 + 19 PSI of boost through it...stock rotating with 317 heads, dual springs.
I am going to be putting in a completely stock 220K mile 5.3 L to see if I can hit low 10's (I have a M6 and traction issues).

These little motors are great for power in stock form.
The key is good tuning, period.

Silver T

Good info here.
Looks like a 5.3 can be safely bored to 3.902 or so which would make it possible to use ls1 pistons, rods and so on. I may go that route. Undecided about using stock crank or a stroker forged one.

Bobsmyuncle

iTrader: (32)

Yea the stock cranks are good well past the 550 mark.

I will b starting a build thread shortly

Bobsmyuncle

iTrader: (32)

Anyone know what the 5.3 hp record is?? Any form, stock or built

IT_SS

iTrader: (5)

I want to say 820 something..

w94rx7tt

iTrader: (1)

I am far from BIG boost, but I put down 609 @ 10lbs on a dyno dynamics through a little 67mm . Here is a dyno clip from yesterday.

http://www.youtube.com/watch?v=D7-m2We2qPg

Here is an idle clip from when it was open down pipe.

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