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What is the Difference between the LM7 LM4 L33 L59 5.3L
05-10-2018, 01:47 PM
#21
TECH Senior Member
03-06-2019, 02:10 PM
#22
TECH Apprentice
TTurbo 5.3L LM7 Engine Specs:
Short-Block: Stock 5.3L LM7 Motor-Factory Dished Pistons (no valve reliefs)
Heads: Stock 706 LM7 (ARP head studs & Fel-Pro MLS gaskets)
Cam: Stock 5.3L LM7
Rockers: Stock 5.3L LM7
Intake: Stock 5.3L LM7 (Manual Accufab TB)
EFI Management: Holley HP
Turbo System: HP Performance Single
Turbo: Precision Turbo 67 mm
Wastegate: TiALhis combination illustrated that even a bone-stock 5.3 can make serious power with a turbo. Ideally we would like to see a top-end upgrade with heads, cam, and intake, but even equipped with the wimpy stock 5.3L cam, stock heads, and intake, this turbo LM7 thumped out some power. Set up to produce just 8 psi, the 5.3L produced 510 hp and 521 lb-ft of torque with no intercooler. We then stepped things up to 11.3 psi with the air-to-air intercooler and were rewarded with 608 hp and 641 lb-ft of torque. Note that the stock, naturally aspirated 5.3L produced 365 hp, then the Precision turbo elevated the entire curve with each successive increase in boost. The presence of 650 lb-ft of torque indicates that even the little 5.3L becomes a serious player with a some boost.
Short-Block: Stock 5.3L LM7 Motor-Factory Dished Pistons (no valve reliefs)
Heads: Stock 706 LM7 (ARP head studs & Fel-Pro MLS gaskets)
Cam: Stock 5.3L LM7
Rockers: Stock 5.3L LM7
Intake: Stock 5.3L LM7 (Manual Accufab TB)
EFI Management: Holley HP
Turbo System: HP Performance Single
Turbo: Precision Turbo 67 mm
Wastegate: TiALhis combination illustrated that even a bone-stock 5.3 can make serious power with a turbo. Ideally we would like to see a top-end upgrade with heads, cam, and intake, but even equipped with the wimpy stock 5.3L cam, stock heads, and intake, this turbo LM7 thumped out some power. Set up to produce just 8 psi, the 5.3L produced 510 hp and 521 lb-ft of torque with no intercooler. We then stepped things up to 11.3 psi with the air-to-air intercooler and were rewarded with 608 hp and 641 lb-ft of torque. Note that the stock, naturally aspirated 5.3L produced 365 hp, then the Precision turbo elevated the entire curve with each successive increase in boost. The presence of 650 lb-ft of torque indicates that even the little 5.3L becomes a serious player with a some boost.
03-06-2019, 02:13 PM
#23
TECH Apprentice
03-06-2019, 02:48 PM
#24
Restricted User
TTurbo 5.3L LM7 Engine Specs:
Short-Block: Stock 5.3L LM7 Motor-Factory Dished Pistons (no valve reliefs)
Heads: Stock 706 LM7 (ARP head studs & Fel-Pro MLS gaskets)
Cam: Stock 5.3L LM7
Rockers: Stock 5.3L LM7
Intake: Stock 5.3L LM7 (Manual Accufab TB)
EFI Management: Holley HP
Turbo System: HP Performance Single
Turbo: Precision Turbo 67 mm
Wastegate: TiALhis combination illustrated that even a bone-stock 5.3 can make serious power with a turbo. Ideally we would like to see a top-end upgrade with heads, cam, and intake, but even equipped with the wimpy stock 5.3L cam, stock heads, and intake, this turbo LM7 thumped out some power. Set up to produce just 8 psi, the 5.3L produced 510 hp and 521 lb-ft of torque with no intercooler. We then stepped things up to 11.3 psi with the air-to-air intercooler and were rewarded with 608 hp and 641 lb-ft of torque. Note that the stock, naturally aspirated 5.3L produced 365 hp, then the Precision turbo elevated the entire curve with each successive increase in boost. The presence of 650 lb-ft of torque indicates that even the little 5.3L becomes a serious player with a some boost.
Short-Block: Stock 5.3L LM7 Motor-Factory Dished Pistons (no valve reliefs)
Heads: Stock 706 LM7 (ARP head studs & Fel-Pro MLS gaskets)
Cam: Stock 5.3L LM7
Rockers: Stock 5.3L LM7
Intake: Stock 5.3L LM7 (Manual Accufab TB)
EFI Management: Holley HP
Turbo System: HP Performance Single
Turbo: Precision Turbo 67 mm
Wastegate: TiALhis combination illustrated that even a bone-stock 5.3 can make serious power with a turbo. Ideally we would like to see a top-end upgrade with heads, cam, and intake, but even equipped with the wimpy stock 5.3L cam, stock heads, and intake, this turbo LM7 thumped out some power. Set up to produce just 8 psi, the 5.3L produced 510 hp and 521 lb-ft of torque with no intercooler. We then stepped things up to 11.3 psi with the air-to-air intercooler and were rewarded with 608 hp and 641 lb-ft of torque. Note that the stock, naturally aspirated 5.3L produced 365 hp, then the Precision turbo elevated the entire curve with each successive increase in boost. The presence of 650 lb-ft of torque indicates that even the little 5.3L becomes a serious player with a some boost.
03-06-2019, 03:36 PM
#25
TECH Senior Member
03-07-2019, 06:43 AM
#26
TECH Apprentice
jus showing easy hp on a stock engine . no need to be dicks
03-07-2019, 10:27 AM
#27
TECH Senior Member
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LilJayV10 (11-28-2021)
11-19-2021, 06:06 PM
#29
11-19-2021, 10:21 PM
#30
TECH Senior Member
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Vana (11-20-2021)
10-10-2023, 09:58 PM
#32
Hello all, I am new to this forum. Great info discussed. I need help on a similar topic.
I have a Gen3 02 gmc yukon xl (z)L59 (285hp) flex fuel with tons of engine issues and will like recommendations on a bolt on replacement engine other than the L59. If I can get better mileage with more horsepower even better. I do not want to replace transmission, wiring harness, computers etc. I heard engine swaps with these LS motors are common but I am having trouble with which will work. Please any and all help is needed, thanks in advance.
I have a Gen3 02 gmc yukon xl (z)L59 (285hp) flex fuel with tons of engine issues and will like recommendations on a bolt on replacement engine other than the L59. If I can get better mileage with more horsepower even better. I do not want to replace transmission, wiring harness, computers etc. I heard engine swaps with these LS motors are common but I am having trouble with which will work. Please any and all help is needed, thanks in advance.
The following users liked this post:
G Atsma (10-10-2023)
10-10-2023, 11:12 PM
#34
