street/strip 5.3 combos?
03-27-2009, 07:16 PM
#1
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street/strip 5.3 combos? just wondering what you guys were running with cammed or h/c/i 5.3's? dynos? track numbers?
and specifically cam selection.
and specifically cam selection.
03-28-2009, 04:42 PM
#6
I've seen lots of vid's on youtube and such, even guys with 4.8's and cams. There aren't a lot of them out there, but the consensus is usually that 224 cams are about the max most 5.3 guys run. Biggest thing is that 95% of them are still in trucks. I have seen a few swapped into some LS conversions.
What is your application?
What is your application?
03-28-2009, 07:52 PM
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its gonna be in a beat up *** 88 thunderbird. sub 3k lbs, th350, 3500+ converter, etc. im probably gonna set up my own custom cam. i really wanna do an absolute max effort pump gas set up an see how far i can take it. im picking the motor up for a really good price. i hae access to a flow bench too, and im going to mill the heads as much as i can (11.5:1+ cr), probably gonna have to fly cut but thats fine.
but yea, i know exactly what you mean, those guys just wanna maximize torque. i dont know if anyones ever really attempted a serious 5.3 build. i know the bores a limiting factor, but its cheap and it'll be fun to see what i can get out of it. i kinda wanted to get a rough idea of what people were putting down but im pretty sure i can get over 400whp with porting and all the compression, even through the auto.
i have lots of time to do my research. im doing alot of reading on DCR, valve events, as well as maximizing pump gas setups, A/F atomization, etc. this should be a fun little build, we'll see.
but yea, i know exactly what you mean, those guys just wanna maximize torque. i dont know if anyones ever really attempted a serious 5.3 build. i know the bores a limiting factor, but its cheap and it'll be fun to see what i can get out of it. i kinda wanted to get a rough idea of what people were putting down but im pretty sure i can get over 400whp with porting and all the compression, even through the auto.
i have lots of time to do my research. im doing alot of reading on DCR, valve events, as well as maximizing pump gas setups, A/F atomization, etc. this should be a fun little build, we'll see.
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03-28-2009, 08:04 PM
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98ta/3000lbs"hopefully"
03 lm7
full bolt ons
fully ported polished 706 5.3 heads
cometic 0.030 gaskets arp bolts
04 ctsv ls6 cam and springs
and 2 dry stages 200-250 shot "whatever it takes haha
60e with a 4000 stall...
ive got around 1000 in the long block,not counting my labor....
hope to spray it to 550rwhp.... not looking for great motor numbers though....
engine goes in the car tommorrow.....
03 lm7
full bolt ons
fully ported polished 706 5.3 heads
cometic 0.030 gaskets arp bolts
04 ctsv ls6 cam and springs
and 2 dry stages 200-250 shot "whatever it takes haha
60e with a 4000 stall...
ive got around 1000 in the long block,not counting my labor....
hope to spray it to 550rwhp.... not looking for great motor numbers though....
engine goes in the car tommorrow.....
03-29-2009, 12:47 PM
#9
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AWESOME! ahha, i was thinking about going tha route too, just a fun street combo and hit it with a big shot.
does anyone know what size valve the 5.3's bore is limited to?
does anyone know what size valve the 5.3's bore is limited to?
03-30-2009, 09:46 AM
#10
Super Chevy magazine did a 5.3 In Oct. '08 and Jan. '09, with Edelbrock 61949 heads, a COMP 220/224-114 .530/.534 cam, FAST LSX 92MM with matching TB, and headers. On the engine dyno, 475 hp @ 6400-6800 rpm, 413 tq @ 5300 rpm, and 324 tq @ 2500 rpm.
For a stock-heads combo, another magazine once did a 5.3 with GM's 88958675 carbureted intake, and a COMP Thumpr cam, specs are 227/241-109, .563/.546, and the engine dyno showed 433 HP @ 6800 rpm, 381 TQ @ 5400-5600 rpm, and 273 TQ @ 1600 rpm.
For a stock-heads combo, another magazine once did a 5.3 with GM's 88958675 carbureted intake, and a COMP Thumpr cam, specs are 227/241-109, .563/.546, and the engine dyno showed 433 HP @ 6800 rpm, 381 TQ @ 5400-5600 rpm, and 273 TQ @ 1600 rpm.
03-30-2009, 08:51 PM
#11
If you aren't trying to fit a displacment class, I believe that you can bore an iron block 5.3 up to 3.9", making it a 346. I've tried finding a thread for you, but I'm not having much luck with search.
03-30-2009, 10:31 PM
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yeah 3.905 is max bore and i agree in an auto it would take a nasty *** setup to hit 400rwhp...if i make 350 to the tire n/a ill be happy...if not oh well ill add more spray....
03-31-2009, 01:45 PM
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That right there shows it would be pretty tough to make 400rwhp through an auto. Perhaps the combo can be improved upon, but I'm guessing it doesn't fit within the budget for this exercise.
If you aren't trying to fit a displacment class, I believe that you can bore an iron block 5.3 up to 3.9", making it a 346. I've tried finding a thread for you, but I'm not having much luck with search.
If you aren't trying to fit a displacment class, I believe that you can bore an iron block 5.3 up to 3.9", making it a 346. I've tried finding a thread for you, but I'm not having much luck with search.
03-31-2009, 06:23 PM
#15
Will Handzel, who went from HotRod magazine to GM Performance Parts Manager, Says the 4.8/5.3 block uses the same water jacket as the 6.0, and can be bored all the way to 6.0L
I decided to try it, being a professional automotive machinist, and having already tried boring a 5.3 to a 5.7 with success. I had read about guys running 11.1:1 with AFR heads, so I combined SpeedPro flattop pistons with stock 5.3 heads, and a used LS6 cam.
It killed the pistons with detonation, but the block is fine.
If you're gonna run boost, then I could see stopping at 5.7L, for the extra cylinder wall thickness. But now there are forged pistons for the 5.3L.
I decided to try it, being a professional automotive machinist, and having already tried boring a 5.3 to a 5.7 with success. I had read about guys running 11.1:1 with AFR heads, so I combined SpeedPro flattop pistons with stock 5.3 heads, and a used LS6 cam.
It killed the pistons with detonation, but the block is fine.
If you're gonna run boost, then I could see stopping at 5.7L, for the extra cylinder wall thickness. But now there are forged pistons for the 5.3L.
03-31-2009, 06:54 PM
#16
i'd do something like a tr224 cam and some good 5.3 heads wit ha nice intake on top something like a ported ls2 or a 90mm fast and you'll have a pretty stout 5.3 i'd say around 400hp with some good long tubes
edit: dynosim show's 507hp to the engine with TEA stage 3 heads and a TR224 cam through large tube headers with 10:1 compression subtract 20% for drivetrain loss thats 405rwhp and i cant even change the intake manifolds on here (atleast not for ls motors)
edit: dynosim show's 507hp to the engine with TEA stage 3 heads and a TR224 cam through large tube headers with 10:1 compression subtract 20% for drivetrain loss thats 405rwhp and i cant even change the intake manifolds on here (atleast not for ls motors)
Last edited by nastychevelle; 03-31-2009 at 07:05 PM.
03-31-2009, 08:45 PM
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Will Handzel, who went from HotRod magazine to GM Performance Parts Manager, Says the 4.8/5.3 block uses the same water jacket as the 6.0, and can be bored all the way to 6.0L
I decided to try it, being a professional automotive machinist, and having already tried boring a 5.3 to a 5.7 with success. I had read about guys running 11.1:1 with AFR heads, so I combined SpeedPro flattop pistons with stock 5.3 heads, and a used LS6 cam.
It killed the pistons with detonation, but the block is fine.
If you're gonna run boost, then I could see stopping at 5.7L, for the extra cylinder wall thickness. But now there are forged pistons for the 5.3L.
I decided to try it, being a professional automotive machinist, and having already tried boring a 5.3 to a 5.7 with success. I had read about guys running 11.1:1 with AFR heads, so I combined SpeedPro flattop pistons with stock 5.3 heads, and a used LS6 cam.
It killed the pistons with detonation, but the block is fine.
If you're gonna run boost, then I could see stopping at 5.7L, for the extra cylinder wall thickness. But now there are forged pistons for the 5.3L.
03-31-2009, 10:36 PM
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good luck with your set up man well if I can help I have a 05 chevy truck with a 5.3 stock head and stock truck intake full bolt on and I'm running a 220-224 112+2 high lift and my times are 13.00 at 102 mph my set up is a 4l65 tranny with a 3800 circle d converter. good luck we have alot of truck running 5.3 around here and most of them are running tsp 220-220 112 + 4 and they work great 
04-01-2009, 09:53 AM
#20
5.3 heads and cam package Here is a package that we will be offer here quite soon using our new 4.8L/5.3L heads.
GM 5.3 HO 19165542
TFS-30500001-C00 Heads 10.28/1
TFS-30602001 Cam 216/220 @ .050 560/560
Truck Manifold / 78mm Throttle body
[IMG]
[/IMG]
GM 5.3 HO 19165542
TFS-30500001-C00 Heads 10.28/1
TFS-30602001 Cam 216/220 @ .050 560/560
Truck Manifold / 78mm Throttle body
[IMG]
[/IMG]
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