Hot Rod's Big Bang Theory - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gchemist · 03-03-2013, 07:16 PM

http://www.hotrod.com/techarticles/h...g_bang_theory/

I decided to look up the article. Nice info. After reading it, I would't be surprised if 4.8 motors started showing in more classic vehicles.

INSIDIOUS '86 · 03-03-2013, 07:28 PM

Yah it's real neat. I think boost is going to dart showing up a LOT more
Posted via Mobile Device

Ziegelsteinfaust · 03-03-2013, 07:40 PM

I myself prefer the 4.8 to the 5.3 for daily driving. It is more forgiving to cruising rpm then the 5.3, and this is from my personal experience.

Most swappers are after hp, and not mpg. My current build plan is to use the 4200 Vortec, and see what is possible mpg wise. I am hoping for a mpg and cost vs buying a new car as my job situation gets back to normal along with my long commutes.

S10Fan · 03-03-2013, 07:43 PM

The 4.8 is a great little motor. Many of the late model UPS trucks in my building are 4.8 powered. Here's one waiting to be dropped in a truck. The old one was at 200K when the oil pump developed problems. Not bad for the abuse we give them.

jitteryguy · 03-03-2013, 08:01 PM

this confirm's that Moma's Cutlas will get a 5.3 or 4.8 .

**rs74** · 03-03-2013, 08:45 PM

Quote:

Originally Posted by jitteryguy

this confirm's that Moma's Cutlas will get a 5.3 or 4.8 .

Post up a pic of that cutlass. I have a 79 and have had it since high school 20 years ago. It has been sitting for quite a while and waiting for the resurection.

bark · 03-04-2013, 01:40 PM

Sweet, I would like to see a price list on parts. I wonder what it would do on my 6.0L?

I know the down fall of a n/a 4.8 or 5.3 is the small bore shrouds the valve flow, but that does not appear to be a problem when boosted...

Nice find! thanks...

silvereagle07 · 03-04-2013, 06:27 PM

That's intresting. Now if they can get a transmission to hold up behind it. Nice find gchemist.

jitteryguy · 03-04-2013, 09:15 PM

Quote:

Originally Posted by rs74

Post up a pic of that cutlass. I have a 79 and have had it since high school 20 years ago. It has been sitting for quite a while and waiting for the resurection.

My girlfriend had one years ago and it has always been here favorite car, she found this while I was gone so I bought it for her. its rust free but definitnely needs restoration.

gchemist · 03-04-2013, 10:03 PM

Let's find this guy!

4.8/4L80e swap in my '74 K5 Blazer. Roush TVS 1900 Supercharger 11 psi of boost, GM '04 LS6 camshaft, Custom Stainless Long Tube Headers, and Edelbrock 90mm throttle body. 430/440 HP/TQ @ the wheel

4.8 Blazer Roush Supercharged Dyno Run - YouTube

gchemist · 03-04-2013, 10:23 PM

How about a 5.3 turbo and 4.8 turbo going at it?

Jake99 Turbo 4.8 vs 03 Silverado w/turbo 5.3 -...

So ya convinced yet? 4.8 is crazy and different. Man, now I'm really considering not retiring my 96 Jimmy. It has a 4.3. A 4.8 is just a little bigger but I can add about 50% more HP.

68Timber · 03-04-2013, 10:33 PM

Quote:

Originally Posted by gchemist

Let's find this guy!

4.8/4L80e swap in my '74 K5 Blazer. Roush TVS 1900 Supercharger 11 psi of boost, GM '04 LS6 camshaft, Custom Stainless Long Tube Headers, and Edelbrock 90mm throttle body. 430/440 HP/TQ @ the wheel

4.8 Blazer Roush Supercharged Dyno Run - YouTube

That looks like FordAssassin's truck. He's local. Like the big bang project, he thought it was a 5.3. I don't think he's too disappointed. The 4.8's look pretty good now, watch prices go up.

y5mgisi · 03-04-2013, 11:19 PM

Turbo 4.8's have been popular for a while now. They are pretty sweet!

BigBlocksRule · 03-05-2013, 08:40 AM

I had a buddy who bought a 4.8L core a few years ago that needed to be overbored. Couldn't find a singe manufacturer that made a piston for an overbored 4.8, even .010 over for a good torque plate hone. Plenty for the 5.3 and larger, but nothing for the little guy.

gchemist · 03-05-2013, 09:34 AM

Adding an LS engine to our trucks.
http://www.hotrodlane.cc/77chevytruck/77chevy.htm

y5mgisi · 03-05-2013, 05:49 PM

Quote:

Originally Posted by BigBlocksRule

I had a buddy who bought a 4.8L core a few years ago that needed to be overbored. Couldn't find a singe manufacturer that made a piston for an overbored 4.8, even .010 over for a good torque plate hone. Plenty for the 5.3 and larger, but nothing for the little guy.

Do your own due diligence and research, but it has been shown and proven that both 5.3's and 4.8's can be taken out to 5.7 bore! My next motor will be a 5.3 bored to a 5.7.

gchemist · 03-05-2013, 07:04 PM

5.7 LS? With a cam swap, a 5.7 would give my ZZ4 a run for it's money.

comegetsome2003 · 03-06-2013, 10:46 AM

My tuner's truck is an 04 sierra....was orginally a 4.8 with a rear mount turbo it put down 475(11lbs) to the tires stock motor with a cam....it run lean and burnt a piston....now it has a forged 5.7( 5.3 bored out to 346ci) and it put down 620ish on 15lbs...truck is a monster on the street and gets almost as good on mpg if you can keep ya foot out of it....foose04 over on pt.net put down 919hp on a stock 4.8 shortblock
Posted via Mobile Device

85burb · 03-06-2013, 10:20 PM

Stock bottom end world record for 5.3 is 996 to the ground. Stock bottom end even heads.

http://ls1tech.com/forums/forced-ind...ingup-now.html

1999 Camaro SS 996RWHP stock 5.3L Turbo! - YouTube

y5mgisi · 03-06-2013, 10:21 PM

I hadent seen that one! That is wild!

74 stepside · 03-06-2013, 11:05 PM

Quote:

Originally Posted by gchemist

5.7 LS? With a cam swap, a 5.7 would give my ZZ4 a run for it's money.

The first LS Was the LS1 which was 5.7 stock.

03-03-2013, 07:16 PM	#1
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Hot Rod's Big Bang Theory http://www.hotrod.com/techarticles/h...g_bang_theory/ I decided to look up the article. Nice info. After reading it, I would't be surprised if 4.8 motors started showing in more classic vehicles. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-03-2013, 07:28 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Hot Rod's Big Bang Theory Yah it's real neat. I think boost is going to dart showing up a LOT more Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

03-03-2013, 07:40 PM	#3
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,629	Re: Hot Rod's Big Bang Theory I myself prefer the 4.8 to the 5.3 for daily driving. It is more forgiving to cruising rpm then the 5.3, and this is from my personal experience. Most swappers are after hp, and not mpg. My current build plan is to use the 4200 Vortec, and see what is possible mpg wise. I am hoping for a mpg and cost vs buying a new car as my job situation gets back to normal along with my long commutes.

03-03-2013, 07:43 PM	#4
S10Fan Old Heap Driver Join Date: Mar 2008 Location: Newport News, Va Posts: 2,642	Re: Hot Rod's Big Bang Theory The 4.8 is a great little motor. Many of the late model UPS trucks in my building are 4.8 powered. Here's one waiting to be dropped in a truck. The old one was at 200K when the oil pump developed problems. Not bad for the abuse we give them. Attached Images __________________ _____________________________ Bryan '99 Silverado 1500, 4.3, 5-speed, reg cab, short bed '50 Chevy 2DR Hard Top, 350/350, M2 Front End, 3:08 gear, cruiser. '40 F**d Sedan, all Chevy power, Heidt's front end, TCI rear, nice driver.

03-03-2013, 08:01 PM	#5
jitteryguy GoatLube Experss Join Date: Oct 2009 Location: clarksville, Tn. Posts: 1,337	Re: Hot Rod's Big Bang Theory this confirm's that Moma's Cutlas will get a 5.3 or 4.8 . __________________ *Goat Lube Express*, locations in Qalat,Afghanistan & Clarksville, Tn. '87 R30 dually 454/TH400 '85 1/2 ton CCSB '92 S10 350/350 '84 MonteCarlo 383/PG/9"ford '78 Malibu wagon 350/350 '78 Cutlass (project family car) '96 S10 Jimmy (Moma's)

03-04-2013, 01:40 PM	#7
bark Registered User Join Date: Jun 2010 Location: Manitoba Posts: 223	Re: Hot Rod's Big Bang Theory Sweet, I would like to see a price list on parts. I wonder what it would do on my 6.0L? I know the down fall of a n/a 4.8 or 5.3 is the small bore shrouds the valve flow, but that does not appear to be a problem when boosted... Nice find! thanks...

03-04-2013, 06:27 PM	#8
silvereagle07 Registered User Join Date: Sep 2008 Location: Bailey, NC Posts: 2,462	Re: Hot Rod's Big Bang Theory That's intresting. Now if they can get a transmission to hold up behind it. Nice find gchemist. __________________ Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT

03-04-2013, 11:19 PM	#13
y5mgisi Second Chance Program Join Date: Jun 2006 Location: Portland, OR Posts: 2,642	Re: Hot Rod's Big Bang Theory Turbo 4.8's have been popular for a while now. They are pretty sweet! __________________ 90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt. 77 C20 crew cab Silverado. 396/th400. In work.

03-05-2013, 08:40 AM	#14
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Hot Rod's Big Bang Theory I had a buddy who bought a 4.8L core a few years ago that needed to be overbored. Couldn't find a singe manufacturer that made a piston for an overbored 4.8, even .010 over for a good torque plate hone. Plenty for the 5.3 and larger, but nothing for the little guy.

03-05-2013, 09:34 AM	#15
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Hot Rod's Big Bang Theory Adding an LS engine to our trucks. http://www.hotrodlane.cc/77chevytruck/77chevy.htm __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-05-2013, 07:04 PM	#17
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Hot Rod's Big Bang Theory 5.7 LS? With a cam swap, a 5.7 would give my ZZ4 a run for it's money. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-06-2013, 10:46 AM	#18
comegetsome2003 Registered User Join Date: Dec 2012 Location: Baxley Ga Posts: 83	Re: Hot Rod's Big Bang Theory My tuner's truck is an 04 sierra....was orginally a 4.8 with a rear mount turbo it put down 475(11lbs) to the tires stock motor with a cam....it run lean and burnt a piston....now it has a forged 5.7( 5.3 bored out to 346ci) and it put down 620ish on 15lbs...truck is a monster on the street and gets almost as good on mpg if you can keep ya foot out of it....foose04 over on pt.net put down 919hp on a stock 4.8 shortblock Posted via Mobile Device __________________ 1991 Square CCLB Dually...laid out on 22s with an old noisy 12 valve

03-06-2013, 10:21 PM	#20
y5mgisi Second Chance Program Join Date: Jun 2006 Location: Portland, OR Posts: 2,642	Re: Hot Rod's Big Bang Theory I hadent seen that one! That is wild! __________________ 90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt. 77 C20 crew cab Silverado. 396/th400. In work.



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