L33 5.3 na performance build recipe
12-05-2013, 05:39 AM
#22
I'm building a L33 at the moment
Cleaned up stock heads (799's)
Trick flow titanium ret and spring kit
Comp push rods
Comp lifters
Comp trunnion upgrade
Comp 231/239 lsr cam
Fast 90 with TB
Arp rod bolts
Cold air feed
Free flowing exhaust
Melling hp oil pump
Ls3 front end
Now idea on power, but will post up when it's dyno'ed
Cleaned up stock heads (799's)
Trick flow titanium ret and spring kit
Comp push rods
Comp lifters
Comp trunnion upgrade
Comp 231/239 lsr cam
Fast 90 with TB
Arp rod bolts
Cold air feed
Free flowing exhaust
Melling hp oil pump
Ls3 front end
Now idea on power, but will post up when it's dyno'ed
12-05-2013, 07:01 AM
#23
06-10-2014, 07:26 PM
#26
Teching In
Join Date: Aug 2010
Posts: 30
Likes: 0
Received 0 Likes
on
0 Posts
I know this is a little old but subscribing. I've got an ultra clean 98 GT Mustang with a PI swap but building the modular is an exercise in futility and even the cheapest supercharger setup is more $$$ than a 5.3L LSx and trans combo. I know that's not all that is involved but I'd rather build a LSx than a Mod motor. Would for sure be looking for a L33.
06-11-2014, 01:29 PM
#28
Teching In
Join Date: Dec 2007
Location: Fort Saskatchewan
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
this may sound like a noob question, but since you were nice enough to list all the parts for this engine build, could you add the parts necessary to do the manual transmission swap
06-11-2014, 02:44 PM
#29
I guess I will add my experience to this...
Last year I played around with an L33 in my Caprice before I swapped over to the turbo 4.8 deal.
Race weight at the time was 3620lbs
Motor was a BONE STOCK L33 with 140+k miles.
Stock cam, stock rod bolts, stock gaskets, truck intake yada yada.
I literally bolted a f-body pan to it, electric water pump, Dougs f-body shorty headers (1-5.8 primiaries 2.5" collectors) and dropped it in.
Through a th350 with 3.73 rear gears, the car would run 13.0 @ 105 all day long after driving it to the track in 90* weather. The combo definately had a high 12 in it.
I am not big on dyno numbers, but for a BONE stock motor, seemed to do ok.
This is what it looked like last year:
Last year I played around with an L33 in my Caprice before I swapped over to the turbo 4.8 deal.
Race weight at the time was 3620lbs
Motor was a BONE STOCK L33 with 140+k miles.
Stock cam, stock rod bolts, stock gaskets, truck intake yada yada.
I literally bolted a f-body pan to it, electric water pump, Dougs f-body shorty headers (1-5.8 primiaries 2.5" collectors) and dropped it in.
Through a th350 with 3.73 rear gears, the car would run 13.0 @ 105 all day long after driving it to the track in 90* weather. The combo definately had a high 12 in it.
I am not big on dyno numbers, but for a BONE stock motor, seemed to do ok.
This is what it looked like last year:
08-30-2014, 09:39 PM
#37
TECH Apprentice
Thread Starter
Join Date: Sep 2013
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
from GM's website, which is the 799 heads;
The Gen IV Vortec 5300’s cylinder heads have been enhanced for improved performance and efficiency. As a result, the LH6 delivers the horsepower and combustion advantages of a higher compression engine, yet operates at peak output on regular-octane gas.
The LH6 takes its cylinder heads from the LS6 V-8 that powers Cadillac’s high-performance CTS-V sedan. Originally developed for the Corvette Z06, these heads improve airflow in and out of the engine. With their pent-roof combustion chambers and new flat-top pistons (the pistons in Gen III Vortec 5300s have a slight sump in the piston deck), the Gen IV Vortec 5300’s compression ratio increases from 9.5:1 to 9.9:1. This increase improves the engine’s volumetric efficiency and increases horsepower.
also the lh8 in my wifes hummer h3 alpha also has the 799 heads.
The Gen IV Vortec 5300’s cylinder heads have been enhanced for improved performance and efficiency. As a result, the LH6 delivers the horsepower and combustion advantages of a higher compression engine, yet operates at peak output on regular-octane gas.
The LH6 takes its cylinder heads from the LS6 V-8 that powers Cadillac’s high-performance CTS-V sedan. Originally developed for the Corvette Z06, these heads improve airflow in and out of the engine. With their pent-roof combustion chambers and new flat-top pistons (the pistons in Gen III Vortec 5300s have a slight sump in the piston deck), the Gen IV Vortec 5300’s compression ratio increases from 9.5:1 to 9.9:1. This increase improves the engine’s volumetric efficiency and increases horsepower.
also the lh8 in my wifes hummer h3 alpha also has the 799 heads.
08-31-2014, 11:49 AM
#38
Teching In
Join Date: Sep 2012
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
The LH6 has DoD, correct?
cobalt, any opinion on the difficulty of a Gen III swap vs. a Gen IV swap? It seems like I recall a discussion with Novak where they indicated Gen III swaps were much easier...
I ask because I'm trying to source an engine for a swap and wanted the L33, but there is an LH6 available locally.
cobalt, any opinion on the difficulty of a Gen III swap vs. a Gen IV swap? It seems like I recall a discussion with Novak where they indicated Gen III swaps were much easier...
I ask because I'm trying to source an engine for a swap and wanted the L33, but there is an LH6 available locally.
08-31-2014, 10:58 PM
#39
TECH Apprentice
Thread Starter
Join Date: Sep 2013
Posts: 320
Likes: 0
Received 0 Likes
on
0 Posts
lh8's are non dod non vvt and are fine to use. the only difference from l33 to lh8 is the cam position sensor location. if you are doing a swap already it is negligible whether you use l33 or lh8. they are both alu block 5.3's with 243/799 heads, flat top pistons, better rod bolts, etc. the lh6 is dod but non vvt and is easier if you replace the dod lifters and use regular non dod lifters but the lh9 5.3 alu block is a dod vvt and could be used but is more difficult to remove the dod and vvt but not impossible.
Last edited by cobalt964; 08-31-2014 at 11:03 PM.
10-11-2014, 01:12 PM
#40
Teching In
Join Date: Mar 2014
Location: Rhode Island
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts