possible 4.8 or 5.3 swap - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 19 (permalink) Old 10-03-2017, 06:19 PM Thread Starter
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possible 4.8 or 5.3 swap

ok well my g8 is getting up there in miles 158k and dod is still working I would like to do a nice budget build I came across a low mil 2009 5.3 motor for $500 or a swap for a set of c6 vette wheels I have I know
going from a 6.0 to 5.3 or even a 4.8 is a down grade but its looking a lot cheaper build I been seeing pretty damn good numbers 420-460hp tuned just seeing what u guys think I been also thinking going the turbo route cheap 4.8 or 5.3
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post #2 of 19 (permalink) Old 10-03-2017, 06:32 PM
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I am curious, what is wrong with your motor that you're considering replacing it?

When I pulled my heads off, the factory crosshatch was still there. The heads were in remarkably good condition and required no machining. By and large the block was in excellent shape.

'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
Power: 400HP/392TQ


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post #3 of 19 (permalink) Old 10-03-2017, 06:44 PM Thread Starter
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Well my motor is fine it does burn oil I get some lifter tick but I would like to swap something else in while I slowly build the other motor I just don't wanna be down a car that all
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post #4 of 19 (permalink) Old 10-03-2017, 07:06 PM
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I see... I understand.

I was lucky enough to have a beater car to drive around while I've been doing my work. No point in selling it since it's garbage anyways... but it works...

Anyways, there are other reasons for oil consumption, though. The valve seals are largely to blame after so many miles, as is the PCV system especially with the driver's side rocker cover if it is not updated. There is a service bulletin out on it for that very reason.

'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
Power: 400HP/392TQ


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post #5 of 19 (permalink) Old 10-03-2017, 07:15 PM
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That 5.3 will still have DOD.


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09 G8 GT Pure White, Ultra Black Graphics
Kooks 1 7/8 LT's (catless), Magnaflow 3", 402 Stroker, F1A 14 psi. E-85 Built 6L80
864 whp/745 tq.
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post #6 of 19 (permalink) Old 10-03-2017, 07:18 PM Thread Starter
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ive had the car a few years now its lowered on coilovers full exhaust tuned all that but I would like to get some power out of the car but the other motors came to mind since a 80k l76 is going for 3k and ls3 5k and 4.8/5.3 400-1250 and they both do pretty damn well with boost
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post #7 of 19 (permalink) Old 10-03-2017, 07:51 PM
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No replacement for displacement
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post #8 of 19 (permalink) Old 10-03-2017, 08:15 PM
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You could probably find an old beater car that you can unload fairly easily once your project is done for about the same cost as you purchased it for..... for what it's worth.
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'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
Power: 400HP/392TQ


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post #9 of 19 (permalink) Old 10-03-2017, 08:52 PM
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Quote:
Originally Posted by beto_juice View Post
No replacement for displacement


Yes there is, its called boost. Otherwise Id have a 600+ci engine.


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09 G8 GT Pure White, Ultra Black Graphics
Kooks 1 7/8 LT's (catless), Magnaflow 3", 402 Stroker, F1A 14 psi. E-85 Built 6L80
864 whp/745 tq.
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post #10 of 19 (permalink) Old 10-03-2017, 09:39 PM Thread Starter
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Would those motor be a direct swap beside swapping the recluctor wheel
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post #11 of 19 (permalink) Old 10-03-2017, 10:02 PM
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Quote:
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Yes there is, its called boost. Otherwise Id have a 600+ci engine.
Or compromise. 417ci + 15psi is pretty peppy.
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post #12 of 19 (permalink) Old 10-03-2017, 10:05 PM
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Pretty much were Im at. Procharged 402, 14psi


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09 G8 GT Pure White, Ultra Black Graphics
Kooks 1 7/8 LT's (catless), Magnaflow 3", 402 Stroker, F1A 14 psi. E-85 Built 6L80
864 whp/745 tq.
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post #13 of 19 (permalink) Old 10-04-2017, 01:18 PM
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possible 4.8 or 5.3 swap

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Originally Posted by kjones21189 View Post
Would those motor be a direct swap beside swapping the recluctor wheel
If the 4.8L ever came with a 58x reluctor wheel, which Im not sure it did then it would be, a little bit of research shows that certain 5.3L came with the 58x which would make it a direct swap.




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post #14 of 19 (permalink) Old 10-11-2017, 09:01 AM
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Drop a 6.0 in ..... ;-)

2009 GT Liquid Red- Bridgestone RE 760's, Xenon H 11's, previous 2005 GTO owner. SOLD Now 17' Camaro SS
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post #15 of 19 (permalink) Old 10-11-2017, 10:06 AM
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You could probably find an old beater car that you can unload fairly easily once your project is done for about the same cost as you purchased it for..... for what it's worth.

I'd do this. That way you have a beater, can take your time, and have a spare car in the future when the G8 is down!
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post #16 of 19 (permalink) Old 10-11-2017, 10:31 AM
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Quote:
Originally Posted by Strykerblue09GT View Post
I'd do this. That way you have a beater, can take your time, and have a spare car in the future when the G8 is down!
My thoughts exactly.

And Mr. Jones.... don't let anybody say your beater car is ugly. It's not ugly, it is seasoned. It's not unreliable, it's 20 years old and it's a friggen tank!

'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
Power: 400HP/392TQ


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post #17 of 19 (permalink) Old 10-11-2017, 10:33 AM
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I forgot to add.... nothing compares to blaring Molly Hatchet (you know the song) in an old beat up Sable like you just don't care...

'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
Power: 400HP/392TQ


"If you want to criticize someone else's work, be sure that your own is in order first."

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post #18 of 19 (permalink) Old 10-15-2017, 10:08 AM Thread Starter
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i found a great little write up on the l96 motor pretty muchis was saying itwas a direct swap for the g8 has anyone ever used this motor or have any info on it im looking for a shortblock i can refresh or rebuild hi comp piston and rods keep it stocked cubes
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post #19 of 19 (permalink) Old 11-06-2017, 02:26 PM
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There is this 5.3 G8 I found on Youtubes is running in the 9s

Last edited by Ls3BeautyBeast; 11-06-2017 at 03:24 PM.
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