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Full External Boltons + Tune 5.3L motor, how much power?

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Old 12-03-2009, 01:51 AM
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Default Full External Boltons + Tune 5.3L motor, how much power?

I am doing an LSX swap on my Firebird and I can get a 5.3L motor VERY cheap and the labor done cheap as well because the shop owns the motor. I want to know what power range would I be looking at with the following mods?

Full Exhaust
--Longtubes
--Hi Flow Cats
--True Duals

Intake
--LS6 or Typhoon Intake
--LID

Tune
Old 12-03-2009, 12:46 PM
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I'm trying to decide because I want around 400 HP... -- What can I do to attain 400 HP out of the 5.3L?
Old 12-03-2009, 12:53 PM
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Auto or Manual? I would guess around 330whp on a manual.
Old 12-03-2009, 01:09 PM
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Port the heads and get a cam. Be close to 400.
Old 12-03-2009, 04:14 PM
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I had a 2005 5.3L with

LS6 intake
LS6 cam + springs
LT and no cats

4l60 with a 3K stall

330 RWHP
326FT pounds at the rear wheels.
Old 12-03-2009, 04:17 PM
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tell him to get it and get a turbo kit and he'll be over 500!
Old 12-03-2009, 05:31 PM
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yah my 99 sierra with full bolt ons and a 212/218 cam made 305rwhp and 330rwtq
Old 12-03-2009, 06:13 PM
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285rw with ls6 cam, sprngs, tune, cai. stock intake, exhaust w cats, stock trans, thermal clutch fan. on 87octane. in rcsb truck, get around 22mpg
Old 12-03-2009, 08:19 PM
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Well, I can't afford a Turbo kit on top of the motor swap. I CAN however turbo my V6 in the car currently and make an easy 400 HP with some supporting motor mods but that would mean I'd also need to rebuild my motor and Im not sure if I want to invest that much in my 3.8L V6.

If I do the motor swap, its ganna stay just like it is the day I drop it in for a good few years because I can't have a car monopolizing all my money, too many other things I have to do. Sooo I gatta have the perfect build up front...

Here's my situation

The LM7 5.3L motor belongs to the shop. He will discount me on labor and plus install the PCM/Wiring Harness for free, coming to about $650 to install the motor and $900 for the actual engine... Everything else will go as a normal LSX swap would, with the radiator, oil pan, front accessories, which he's also giving me a discount on. Basically I'm looking at the whole job complete somewhere between $2,500 and $3,000 .. Also his motor has $43k miles and he will warranty it for six months...

If I go this route, I wanna slap on a heads/cam package... -- for $800 more he will also bore it to a 5.7L so it will be like an Iron block LS1...

ON THE OTHER HAND...

There's an LQ4 6.0L motor in Florida, 50k miles and it costs $850 -- If I purchase from there, I will get the PCM and Wiring Harness $75 off but the labor to install the motor will jump up to $900 in labor... which still honestly isnt bad... again, everything will go as with a normal motor swap, he will also still discount me on the accessories, oil pan, and other stuff... The motor does come with a warranty, but not from the shop, so if I go 50 miles down the road and it dies on me then I come out of pocket to pull the motor back out and have it repaired...

If I go this route, slap on some L92 Heads and a Cam rated to .550 lift and I can have a wild little machine, at least 450 HP with a tune... but I might also be forced to upgrade a lot of drive train stuff, including my rear axel which Im not quite ready to do yet.

which way would you go?
Old 12-04-2009, 09:36 AM
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Originally Posted by Need4Camaro
Well, I can't afford a Turbo kit on top of the motor swap. I CAN however turbo my V6 in the car currently and make an easy 400 HP with some supporting motor mods but that would mean I'd also need to rebuild my motor and Im not sure if I want to invest that much in my 3.8L V6.

If I do the motor swap, its ganna stay just like it is the day I drop it in for a good few years because I can't have a car monopolizing all my money, too many other things I have to do. Sooo I gatta have the perfect build up front...

Here's my situation

The LM7 5.3L motor belongs to the shop. He will discount me on labor and plus install the PCM/Wiring Harness for free, coming to about $650 to install the motor and $900 for the actual engine... Everything else will go as a normal LSX swap would, with the radiator, oil pan, front accessories, which he's also giving me a discount on. Basically I'm looking at the whole job complete somewhere between $2,500 and $3,000 .. Also his motor has $43k miles and he will warranty it for six months...

If I go this route, I wanna slap on a heads/cam package... -- for $800 more he will also bore it to a 5.7L so it will be like an Iron block LS1...

ON THE OTHER HAND...

There's an LQ4 6.0L motor in Florida, 50k miles and it costs $850 -- If I purchase from there, I will get the PCM and Wiring Harness $75 off but the labor to install the motor will jump up to $900 in labor... which still honestly isnt bad... again, everything will go as with a normal motor swap, he will also still discount me on the accessories, oil pan, and other stuff... The motor does come with a warranty, but not from the shop, so if I go 50 miles down the road and it dies on me then I come out of pocket to pull the motor back out and have it repaired...

If I go this route, slap on some L92 Heads and a Cam rated to .550 lift and I can have a wild little machine, at least 450 HP with a tune... but I might also be forced to upgrade a lot of drive train stuff, including my rear axel which Im not quite ready to do yet.

which way would you go?
$900.00 sounds kinda high for a 5.3 motor.
Old 12-04-2009, 11:52 AM
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You might want to do some more research. Standard L92 heads won't fit on a smaller than 4" bore (LS1 = 3.898, 5.3L = 3.78).

The engine price isn't great but isn't terrible. I think you're going to spend more than you think at that shop unless they start eating parts/labor.

I made over 400 RWHP with a heads/cam/bolt ons 5.3L but my heads cost more than your total budget.
Old 12-04-2009, 11:55 AM
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320rwhp...maybe
Old 12-04-2009, 01:23 PM
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Originally Posted by Need4Camaro
Well, I can't afford a Turbo kit on top of the motor swap. I CAN however turbo my V6 in the car currently and make an easy 400 HP with some supporting motor mods but that would mean I'd also need to rebuild my motor and Im not sure if I want to invest that much in my 3.8L V6.

If I do the motor swap, its ganna stay just like it is the day I drop it in for a good few years because I can't have a car monopolizing all my money, too many other things I have to do. Sooo I gatta have the perfect build up front...

Here's my situation

The LM7 5.3L motor belongs to the shop. He will discount me on labor and plus install the PCM/Wiring Harness for free, coming to about $650 to install the motor and $900 for the actual engine... Everything else will go as a normal LSX swap would, with the radiator, oil pan, front accessories, which he's also giving me a discount on. Basically I'm looking at the whole job complete somewhere between $2,500 and $3,000 .. Also his motor has $43k miles and he will warranty it for six months...

If I go this route, I wanna slap on a heads/cam package... -- for $800 more he will also bore it to a 5.7L so it will be like an Iron block LS1...

ON THE OTHER HAND...

There's an LQ4 6.0L motor in Florida, 50k miles and it costs $850 -- If I purchase from there, I will get the PCM and Wiring Harness $75 off but the labor to install the motor will jump up to $900 in labor... which still honestly isnt bad... again, everything will go as with a normal motor swap, he will also still discount me on the accessories, oil pan, and other stuff... The motor does come with a warranty, but not from the shop, so if I go 50 miles down the road and it dies on me then I come out of pocket to pull the motor back out and have it repaired...

If I go this route, slap on some L92 Heads and a Cam rated to .550 lift and I can have a wild little machine, at least 450 HP with a tune... but I might also be forced to upgrade a lot of drive train stuff, including my rear axel which Im not quite ready to do yet.

which way would you go?
you are gonna spend around $3800 for the 5.3 motor with cam package, im going to spend around that much for the 5.3/heads/cam/turbo/pipping/ and be over 550 easy!!
Old 12-04-2009, 01:25 PM
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btw the 5.3 for $900 is way too much i got my shortblock for $250 with arp rod bolts stock complete blocks go for around $500 or so on ebay
Old 12-04-2009, 05:15 PM
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Originally Posted by digitalsolo
You might want to do some more research. Standard L92 heads won't fit on a smaller than 4" bore (LS1 = 3.898, 5.3L = 3.78).

The engine price isn't great but isn't terrible. I think you're going to spend more than you think at that shop unless they start eating parts/labor.

I made over 400 RWHP with a heads/cam/bolt ons 5.3L but my heads cost more than your total budget.
I meant if I go the LQ4 route (which is a 6.0L with a 4" bore) I will use L92 Heads. With the 5.3L, I'm not sure what kind of heads I will use, might just have the stock ones P&P'd, install better valve springs and a cam...
----------------
As for the 5.3L @ $900 ... I do think it IS a little high but realistically I'm not going to get one cheaper easily. Even at LKQ motors they're priced at $450, $500...but I still have to pay $250 for shipping and those motors have much more mileage than this one... The MAIN reason I'm going with this motor is because if something should go wrong, the shop will fix it without charging me...
----------------
As for the engine, turbo, heads, cam setup... can you give me all the prices you're paying to bring that up to $3,800? and also is your setup going to be intercooled? A rear mount STS kit alone costs about that much and it's the only feasible turbo system for the LSX Camaro as its hard to do a front mount...
Old 12-04-2009, 05:27 PM
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this is front mount
short block 5.3 motor 250
manifolds 50
317 heads 150
hop side pipes 200
gasket 120
cold side piping 150
cam zo6 150
turbo 1000
bov+wg 250
fuel pump 100
injectors 390
intercooler 150
ls6 intake 350
springs 100
and lil **** here and there 300
Old 12-04-2009, 05:40 PM
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Originally Posted by LS1BLKSS
this is front mount
short block 5.3 motor 250
manifolds 50
317 heads 150
hop side pipes 200
gasket 120
cold side piping 150
cam zo6 150
turbo 1000
bov+wg 250
fuel pump 100
injectors 390
intercooler 150
ls6 intake 350
springs 100
and lil **** here and there 300
Thats pretty nice, I should consider doing that, what turbo are you going with? The only problem I have with a turbo is that I have no place I can mount an inter cooler in my Firebird. Your Camaro has a grille so yours will get constant airflow but my nose panel is sealed off asside from the bird emblem I dont want to remove.

What kind of manifolds are you using btw? I'm guessing ones from an LS4???

What type of turbo?
Old 12-04-2009, 06:48 PM
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Pull the heads on the 3.8L a little clean up work, thicker head gasket and boost the **** out of it.....

To this day there isn't many cars I have been in that'll plant you in the seat like a 3.8 turbo motor.

It's a series II and not an LC2, but would make good reliable power nonetheless.........
Old 12-05-2009, 12:37 AM
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Originally Posted by PETE180
Pull the heads on the 3.8L a little clean up work, thicker head gasket and boost the **** out of it.....

To this day there isn't many cars I have been in that'll plant you in the seat like a 3.8 turbo motor.

It's a series II and not an LC2, but would make good reliable power nonetheless.........
But even with 100K miles on the stock bottom end, will it hold up to 14 PSI??? I was going to have it tuned by a pro to prevent detonation and he is also doing the install IF I go that route, but I'm alittle afraid of the reliability because I cover a good 6k miles every month... I know a forged bottom end would definately do the job, but there's also alot of other parts that would need to be replaced which would bump the price for this setup WAY up... not to mention the V6 tranny 2nd to 3rd shift isnt ganna like the new power.
Old 03-28-2010, 12:13 PM
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You shouldn't worry so much about a gauge reading as opposed to the amount of power you make. You may see 11psi on a stock pulley-ed 3800 supercharged motor.

Port the intake and heads and at the same supercharger speed you may see 7psi. It's all in the tune.

Pull the heads look at the cylinders, pull the caps and look at the bearings. If everything looks good. reassemble it and have fun. Thats what I di with my 5.3L. Added cnc'd heads and a cam and run it to death. Shortblocks are cheap.........

And labor is free............


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