What dose everyone thank of this motor

[1999crewcab]

i have a 1999 ccsb obs with a 350 vortec and 4l80 trans 163000 miles and i pull a 9000 pound camper and am looking to upgrade the motor tuck is paid for and i dont want any truck payments and i love this body style truck its a 383 vortec there is a dyno shop close to me that dose the tunes inperson so that is not an issue

http://www.ebay.com/itm/CHEVY-383-VO...item2ebabdeeb2

and here is the dyno sheet he sent me


CHEV 383 STROKER VORTEC LONG BLOCK

CHEV 370HP/445FTLBS VORTEC 1996-2001

4-BOLT 1 PC REAR MAIN SEAL VORTEC BLOCK
GM 350 CON RODS W/ARP ROD BOLTS & NUTS
NEW STEEL 383 CRANKSHAFT
HYPERUETECTIC PISTONS 9.7 TO 1 COMP
PLASMA MOLY PISTON RINGS
COMP CAMSHAFT
.488/.495-264/269-212/218-112 DEGREES
HYDRAULIC LIFTERS
BRASS FREEZE PLUGS
NEW HARMONIC BALANCER
TRI-METAL 780 “IROC” SERIES BEARINGS
CLOYES ROLLER TIMING SET
COMPLETE GASKETS SET
MELLING HV OIL PUMP
VORTEC CYLINDER HEADS
W/1.60/2.02 STAINLESS STEEL SWIRL POLISHED VALVES
SCREW-IN STUDS & GUIDE PLATES
ARP CYLINDER HEAD BOLTS
ROCKERS ARM
BORE AND HONE BLOCK WITH TORQUE PLATE
DECK ENGINE BLOCK PARALLEL TO MAIN LINE
RE-SIZE CONNECTING RODS WITH ARP BOLTS AND NUTS
HANG AND ALIGN PISTONS
LINE HONE ENGINE BLOCK
FULLY BALANCE ENGINE ASSEMBLY
ASSEMBLE LONG BLOCK

PRICE $2695.00

RPM TQ HP CFM
1500 378 149 203
2000 385 157 232
2250 394 192 248
2500 407 234 279
2750 418 256 303
3000 426 271 331
3250 438 289 359
3500 441 305 386
3750 443 318 414
4000 445 321 442
4250 444 343 469
4500 439 350 497
4750 431 362 524
5000 420 370 552
5250 398 362 580
5500 380 355 607

[1998454]

That should wake the old truck up if you can get the tune right.

[91chevZ71]

Tuning will be an issue, I'd put an L29 in there and help it out by porting the heads and a BlackBear tune. Keep it GM.
Cheaper to get an L29, MILDLY cam it, get the heads worked over, port the L29 intake to match.
You need to wire in 8 injector connector from the original L31 harness, but that isn't too bad imo.

Just my personal preference, but I'd rather run a big block if your gonna be pulling that much. I'm saying that from the reliability aspect...the BB is designed to be run heavy. Don't need to stroke and run a bunch of suped-up parts to get the power, the BBC has all that built into it. just my $.02

Crew cab short bed OBSs are awesome trucks, wish I had one

[1999crewcab]

when i bought the truck i did not need a bb i have looked for a ccsb obs with a bb but cant finde one in good shape

[91chevZ71]

ANother thing about that small block you're looking at..
It cranks out some serious HP, I doubt the stock fueling system (spider poppet system) can support that much HP.
L29 uses normal injectors, upgradeable, etc.
somthing to consider

-edit
of course, there is the marine intake if you want to run normal injectors on the L31,

I still say go L29

[1999crewcab]

what is the l29

[91chevZ71]

454 Vortec

[1999crewcab]

and the l 31 is the 350

[91chevZ71]

yep

[91chevZ71]

If you could find a donor truck in a yard somewhere, it would be the way to go. Grab the radiator, oil cooler lines, tranny cooler lines, accessory brackets, etc,etc. AIr cleaner, etc,etc, you get the point

I almost considered dropping an L29 into my Tahoe, but the L31 runs pretty good for what I ask of it

[1998454]

The L29 with a tune will put a smile on your face

[1999crewcab]

if i cant find a 454 or donor truck do u thank that motor would work i am towing not out trying to race

[1998454]

If you can get enough fuel to it. Could get expensive.

[91chevZ71]

Just a side note, my buddy has a 2-door Tahoe with a 489 BBC with vortec 454 heads mildly ported, a mild cam, and a so-so tune and it is amazing.
It's still TBI..I'm trying to convince him to swap on the L29 intake that he has sitting on his shelf...
My point is just that by swapping in an extremely mild cam and a little head work the BBC is amazing. THe largest hurdle to stock Vortec 454s is the tune... it's de-tuned on purpose to increase reliability. These went into work trucks, plow trucks, etc... trucks that get beat on.

[91chevZ71]

ya, fuel would be bad but it would be bad with any rig towing 9000 lbs.

THe 454 Vortec would be great...the intake is designed to give boo-koo torque where you need it, down low. Kind of like a TPI setup, doesn't really run great at high RPM but down low, where the runners and heads work together, it shines. 454 Vortec aren't meant to be high-rpm runners... perfect for your app, bro

[1999crewcab]

ok i talked to the guy and he said i would not get all the hp with out a tune but one i had a tune i would have all the hp but he said i would have all the tq without the tune


if i could find a 454 would my fule pump and computer work or not

[SUBURBIAN]

This is not a bolt in, tune, and go. You will pay $eriou$ coin to feed fuel to that engine.

[91chevZ71]

This being a world with people who have bottomless pockets, I would say Duramax...
but that 454 can pull, man. Just takes a bit of tweaking

[1998454]

Fuel pump, yes. Computer would have to be tuned for the 454. The 454 also uses normal injectors that can be upgraded..mine has Ls1 injectors in it now.

[91chevZ71]

ok i talked to the guy and he said i would not get all the hp with out a tune but one i had a tune i would have all the hp but he said i would have all the tq without the tune


if i could find a 454 would my fule pump and computer work or not

Your tuner guy should be able to re-flash your PCM with the right stuff. Don't quote me on that, but that isn't a big hurdle...Black box vortec PCMs are a dime a dozen. As far as the fuel pump thing, I would just drop the 100 bucks and put a Walbro in there. But yes, on a stock Vortec 454 engine your fuel pump is good to go.

The knock modules in the PCM might be different from L31 to L29, but if you grab a L29 PCM that was attached to a 4L80 you should be good to go. YOur tuner should know all of that, tho

[91chevZ71]

Don't forget about all the emissions stuff...evap canister, all those lines, etc. Smog crap, etc,etc. I can't recall if they are the same from L31 to L29, I doubt it, so find a donor truck and rape and pillage that puppy

[1999crewcab]

ok how much should i be able to pick up a motor for or truck i hate to spen 2000 for the truck or motor 2000 for a rebuild and end up having 5-6000 in it

[91chevZ71]

I almost bought an L29 with about 80k it off of craigslist for 750. complete, with accessories, everything. Just look around, man.
you should be able to get away for about 2 grand, maybe 2500. Exhaust, tuning, everything.

[1999crewcab]

also the guy who dose the tunes in about an hour away from me u drop the tuck off and her keeps it 2 days and finetunes everythang on a dyno and on the street for 600 for a motor like this his reg tunes are 200 witha stock motor

[1999crewcab]

whats the cost to rebuild i hate to put in in with out rebuilding it first

[91chevZ71]

you could rebuild it yourself, prolly cost a grand in parts. I'm not a BBC expert, tho.

Swaps are expensive, man. Any way you cut it...

[1999crewcab]

spoke with the guy today about this motoer and he said that this motor was built for this appication and when thy dynoed it thay used the same fuel system that comes on the truck and he said if i steped up to the next level of motor i would have the issues of having to upgrade the fuel systm and computer he said this motor was desingned for this type off install