An opportunity for the 5.3 N/A nitrous guys....
08-26-2014, 11:11 AM
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An opportunity for the 5.3 N/A nitrous guys.... I had a offering by a local engine dyno to dyno my engine for free. The favor will get returned when I introduce him to the carburetor LS world. I know he has a stock 5.3 there so i do believe we can get some exact numbers comparing a stock carbed to a tastefully built one. Ive done a ton of research on the topic of carbed 5.3 and have found this topic severely lacking. I will post the progress here sometime next week.
Thanks for reading.
Thanks for reading.
09-08-2014, 06:34 PM
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Well im glad somebody wanted to see some results here goes...
This was done on a land and sea engine dyno.
Motor breakdown..
5.3 with arp rod bolts and floating pin flat top pistons and rods. 317 heads (i lapped the valves) as cast not milled or cleaned up. Becides the cleaning you do with soap and water.
China head studs
Vic jr / msd 6010
Qp 770 carb ( pulled my holley 700 dp off because it was going lean) in fact we stopped the pulls because we were going lean @6800 rpm
So far ive hit....well ill show you the graph..lol
This cam
With longtubes
Im stoked and going back tomorrow to see where it stops pulling or blows up lol
Also pac single coil beehives (the .625 lift ones)....used.lol
This was done on a land and sea engine dyno.
Motor breakdown..
5.3 with arp rod bolts and floating pin flat top pistons and rods. 317 heads (i lapped the valves) as cast not milled or cleaned up. Becides the cleaning you do with soap and water.
China head studs
Vic jr / msd 6010
Qp 770 carb ( pulled my holley 700 dp off because it was going lean) in fact we stopped the pulls because we were going lean @6800 rpm
So far ive hit....well ill show you the graph..lol
This cam
With longtubes
Im stoked and going back tomorrow to see where it stops pulling or blows up lol
Also pac single coil beehives (the .625 lift ones)....used.lol
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09-09-2014, 06:50 AM
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09-09-2014, 07:16 AM
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i didn't expect to see that sort of torque curve with that big of cam, relatively low compression, and small cubes. good job. for clarity: is this all motor or are you spraying it here? the numbers seem slightly higher than expected n/a, but definitely not high enough to indicate any sizable shot.
09-09-2014, 07:27 AM
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i didn't expect to see that sort of torque curve with that big of cam, relatively low compression, and small cubes. good job. for clarity: is this all motor or are you spraying it here? the numbers seem slightly higher than expected n/a, but definitely not high enough to indicate any sizable shot.
Im picking up a 950 hp holley carb this morning then back to the dyno to find the peak.
09-09-2014, 09:48 AM
#16
Damned man if you hadn't shorted on the valve springs and pushrods I would be excited to see you turn it way up. With a .030 valve clearance and beehives I'm hoping you have a engine diaper. Stock pushrods are not a safety margin.
