Owner: MegatronAdded: 27 September 2013 - 08:56 AM
Owner: MegatronAdded: 25 September 2013 - 07:37 AM
Owner: Moses LudelAdded: 15 September 2013 - 01:16 PM
Owner: biggman100Added: 22 September 2013 - 05:22 PM
Owner: Moses LudelAdded: 15 September 2013 - 08:42 AM
Comp Cams Choices?
Posted 07 May 2013 - 11:51 AM
Posted 09 May 2013 - 10:07 PM
The grind has been around for a long time, I first tried it on 383 Chevy SB V-8 stroker motors built for off-road use and trailer pulling in the late 1980s/early '90s timeframe. It was phenomenal for low-end torque, a lower rpm ceiling (4,200-4,600 rpm, will run out around 5,000 rpm) with peak torque by 2000-2400 rpm, depending upon engine application. Manifold vacuum at lower speeds is excellent.
All of that said, my first use in an inline six was a Ford 300 with MPI. It ran flawlessly, again with a quick torque rise and great bottom end. Move to the 4.0L and 4.2L or 4.6L Jeep inline six, again a success story.
The 4.6L in the '98 XJ Cherokee that I talk about in the vlog discussion was built by Hewes Performance with the 252 grind, as was the 4.6L in the CJ-8 Scrambler walk-around video. This camshaft delivers! I use it...We've run the cam with stock injectors and with Ford 24 pound injectors in 4.6L Jeep buildups.
Perhaps CompCams wants to avoid emissions controversy here, although there's no reason to suspect higher tailpipe emission readings...We've seen no check lights, either, even with the 24 pound injectors. We're holding compression to 8.7:1.
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