Finding max RPM?
Thread Starter
Launching!
Joined: Apr 2013
Posts: 225
Likes: 0
Finding max RPM? I now have my 5.3L installed, wired, and running. I am waiting for the swap headers to get here, but for now I am wondering how to determine how far I can rev the engine?
Like most people I lost the cam card almost first thing.
New lifers, and valve springs.
I think the rocker arms are still stock.
What other information is needed?
Update
I guess for now I'll just keep it at LT1 redline.
Like most people I lost the cam card almost first thing.
New lifers, and valve springs.
I think the rocker arms are still stock.
What other information is needed?
Update
I guess for now I'll just keep it at LT1 redline.
Last edited by ChevyOwner; Sep 20, 2014 at 10:49 PM. Reason: update
Thread Starter
Launching!
Joined: Apr 2013
Posts: 225
Likes: 0
I did not find the cam card, but I did find the part number for it from Comp Cams 54-408-11 (XR259HR)
If any more information is needed or wanted please ask for it.
If any more information is needed or wanted please ask for it.
TECH Senior Member
Joined: Feb 2009
Posts: 5,445
Likes: 4
go to comps website and look up the specs on the cam .probably makes peak hp below 5500rpm ,no need to rev past 6000rpm.what valve springs did you use ? and did you shim the springs to meet the required spring pressure for those lobes ? what injectors are you using ? what injectors were used with the motor that ECM came from ?
Thread Starter
Launching!
Joined: Apr 2013
Posts: 225
Likes: 0
I would hope the machine shop installed the springs correctly. I was not confident in assembling the engine, and I asked the machine shop to assemble the long block.
Not sure on the injectors, but I think they are 2010-2012 flex fuel injectors.
The ECM is a Megasquirt 3x v3.57
I know I always leave something out (different subject). I see this information is need just fine today, but yesterday I could not think of it at all.
The engine has flat top pistons, and CRS6100M3D rods.
Not sure on the injectors, but I think they are 2010-2012 flex fuel injectors.
The ECM is a Megasquirt 3x v3.57
I know I always leave something out (different subject). I see this information is need just fine today, but yesterday I could not think of it at all.
The engine has flat top pistons, and CRS6100M3D rods.
Thread Starter
Launching!
Joined: Apr 2013
Posts: 225
Likes: 0
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