Click here to visit LS1Tech
Click here to visit Performance Trucks
Click here to visit Mod Motor Tech
Click here to visit Modern Hemi

PerformanceTrucks.net Forums  

Go Back   PerformanceTrucks.net Forums > GENERAL TRUCK PERFORMANCE, PROJECTS, & GROUP DISCUSSION...specifically > FORCED INDUCTION
Sign in using an external account
Register Forgot Password?

Welcome to Performance Trucks!
Welcome to Performance Trucks,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 07-18-2011, 10:58 PM   #1
Trader Rating: 3
TECH Fanatic
 
foose04's Avatar
 
Join Date: Dec 2009
Location: Charleston, SC
Posts: 1,454
Default LS Power!! Twin 76mm Turbo 4.8L 1200HP & still going!!

Info is from a local forum:

Quote:
Originally Posted by s14.5gonewide View Post





so to all you lsx boys.. stop bottle feeding and start force feeding..
the article below
594HP 5.3L Gen III Small Block for $3,252 - Hot Rod Magazine

the skinny
Heres the skinny:

The goal of the test was to test the true limits of the LM7, which is the 5.3L truck engine based on the LSx series engines. Pretty much an LS1 with an iron block in a nutshell.

They picked up what they thought was an 5.3L LM7 but, as they found out after the testing was over, it was actually a 4.8L LR4 which is the smallest of the LSx based iron truck engines. One phenomenal part about the engine was the #8 cylinder had a large rust spot etched in it that their hone wouldn't remove....they left it there.

For the top end they upgraded to 2" intake valves, stock exhaust valves and did a very mild port job on the heads. Flow numbers went from 220/220 to 300/220 cfm on the intake and exhaust respectively. ARP studs with Fel-Pro MLS gaskets kept the heads down. A mild Comp Cams cam was installed along with the supplied lifters, pushrods, springs and rockers remained stock. A FAST LSXR intake was installed as well with a big TB.

The short block(except the cam) was all stock. Even the original bearings and rings that were on the motor when it was purchased were reused. They even sanded the rust off the #8 rings and reused them!

Fueling was handled by 75 lbs/hr injectors and upgraded fuel rails. It was run on Rockett 118.

The two turbochargers were CXracing 76mm units run off of flipped shorty truck headers(no name brand headers).

The engine was run for SIXTY dyno pulls over half of which were claimed to be at 1000+ hp. In it's final trim, in between 26 and 27psi, the engine produced just over 1200hp. What stopped the testing was not engine failure but an ignition failure(all sensors and electrical components like the ignition were stock). The engine was 100% a-ok by the end of the testing.
__________________

04 GMC RST: TMS Iron 347/S480/4l80E - 9.77@140.40
05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 37" Toyo M/T's,
97 22" Baja Hammer: Boss w/stock 454
foose04 is offline   Reply With Quote
Old 07-18-2011, 11:15 PM   #2
Trader Rating: 2
TECH Addict

 
black00chev's Avatar
 
Join Date: Dec 2009
Location: Warrenton, VA
Posts: 2,571
Send a message via AIM to black00chev
Default

That is awesome!!!

I know you want to do that to your 4.8!!! DO ITTTT!!!!
__________________
-aka Jason
'00 5.3L Z71, BlackBear tune, JFR triple 12 cam, milled 862s 10:1, walbro 255, e-fans, SLP cai, LTs/ORY, 2.5" bullet dumped, DJM rear sway bar, and 2/4 drop.
1/8 @ 9.80/74.04/4WD ~330/330
30-90 pull-https://www.youtube.com/watch?v=7MZC...CYyjaw&index=1
To be installed: truetrac, moser girdle/studs, 40k, vette 2nd/billet 4th servos, HD2, 60# injectors and KBracing MP70 I/C kit
black00chev is offline   Reply With Quote
Old 07-18-2011, 11:23 PM   #3
Trader Rating: 7
Launching!
 
gavin2005's Avatar
 
Join Date: Aug 2010
Location: baxley,ga
Posts: 260
Default

wow.thats badass and i take it they still didn't find the breaking point?
__________________
04 sierra forged 347~t76
gavin2005 is offline   Reply With Quote
Old 07-18-2011, 11:25 PM   #4
Trader Rating: 7
Launching!
 
gavin2005's Avatar
 
Join Date: Aug 2010
Location: baxley,ga
Posts: 260
Default

Quote:
Originally Posted by black00chev View Post
That is awesome!!!

I know you want to do that to your 4.8!!! DO ITTTT!!!!
don't tease him.he will have it on 25psi next time at track.lol
__________________
04 sierra forged 347~t76
gavin2005 is offline   Reply With Quote
Old 07-18-2011, 11:28 PM   #5
Trader Rating: 16
TECH Fanatic
 
SincalT/A's Avatar
 
Join Date: Oct 2006
Location: Currently In suspense.
Posts: 1,784
Default

I'll stick by what I've said a handful of times that..."The 4.8l is capable of making the most power from a stock shortblock."Jus plain amazing imo...Thanks,Hotrod
__________________
I CAN EXPLAIN IT TO YOU BUT,I CAN'T UNDERSTAND IT FOR YOU....
SincalT/A is offline   Reply With Quote
Old 07-18-2011, 11:29 PM   #6
Trader Rating: 3
TECH Fanatic
 
foose04's Avatar
 
Join Date: Dec 2009
Location: Charleston, SC
Posts: 1,454
Default

Hmmmmmm.... Well I did swap to a new boost gauge, old one only went to 15, new one goes to 30... hmm
__________________

04 GMC RST: TMS Iron 347/S480/4l80E - 9.77@140.40
05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 37" Toyo M/T's,
97 22" Baja Hammer: Boss w/stock 454
foose04 is offline   Reply With Quote
Old 07-18-2011, 11:37 PM   #7
Trader Rating: 6
TECH Resident
 
Join Date: Mar 2010
Posts: 898
Default

Time to turn it up a bit.
chevyboy.520 is offline   Reply With Quote
Old 07-18-2011, 11:41 PM   #8
Trader Rating: 21
TECH Addict

 
2007chevy5.3l's Avatar
 
Join Date: Apr 2008
Location: Fort Worth, Texas
Posts: 2,625
Default

I need a turbo
__________________
2007 Tahoe. Cam, Heads, Exhaust. Faster than cdub81

1998 Acura integra gsr coming soon- fully built 2.0L. Vtec with boost

2007chevy5.3l is offline   Reply With Quote
Old 07-18-2011, 11:44 PM   #9
Trader Rating: 2
TECH Addict

 
black00chev's Avatar
 
Join Date: Dec 2009
Location: Warrenton, VA
Posts: 2,571
Send a message via AIM to black00chev
Default

Quote:
Originally Posted by SincalT/A View Post
I'll stick by what I've said a handful of times that..."The 4.8l is capable of making the most power from a stock shortblock."Jus plain amazing imo...Thanks,Hotrod
Im gonna safely assume that this holds true due to having the thickest cylinder walls.



Do it foose... at least see what that single 76 can turn out! Im sure it could handle a pass or two at 20psi lol.
__________________
-aka Jason
'00 5.3L Z71, BlackBear tune, JFR triple 12 cam, milled 862s 10:1, walbro 255, e-fans, SLP cai, LTs/ORY, 2.5" bullet dumped, DJM rear sway bar, and 2/4 drop.
1/8 @ 9.80/74.04/4WD ~330/330
30-90 pull-https://www.youtube.com/watch?v=7MZC...CYyjaw&index=1
To be installed: truetrac, moser girdle/studs, 40k, vette 2nd/billet 4th servos, HD2, 60# injectors and KBracing MP70 I/C kit
black00chev is offline   Reply With Quote
Old 07-18-2011, 11:56 PM   #10
Trader Rating: 26
TECH Fanatic
 
denali_on_26's's Avatar
 
Join Date: Aug 2008
Location: Where our street cars are faster than your racecars..Mississippi
Posts: 1,113
Default

5.3 and 4.8 have same thickness walls.....right?
__________________
2000 rcsb
408ci stock heads stock intake
KBracing gt-91 t6 turbo kit
2005 Dodge Cummins BMF wheels and twin turbo just the DD
2009 Can-Am silver outlander 800ish FCP'd up and ///AIRDAM'd out
denali_on_26's is offline   Reply With Quote
Old 07-18-2011, 11:56 PM
PerformanceTrucks
Ford F150




Paid Advertisement
Reply

Tags
1200, 1200hp, 48, 48l, 53, chevy, hot, hotrod, hp, ls, magazine, rod, turbo, turbocharged, twin


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:38 AM.

 



Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

PerformanceTrucks.net and InternetBrands, Inc. are not affiliated with the Ford Motor Company