Comp Cams
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98blackmagic
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If you can get the September 04 issue of Muscle Mustangs & Fast Fords. There is a great write up on all six of the comp cams. They say the xe262 would be the best choice for a daily driver n/a or if you have forced induction go with the xe274's. I have a 4.6 being assembled now at my speedshop 
that has forged pistons, new rings, bearings, rods........ Stage 2 PI heads from Heads up Performance, 30lb injectors and the xe278 cams 
. I am going to run a blower on the motor as well, so with the ported heads and the blower the 278's were the best choice for the maximum power from the combo. Custom tuning is required for me but if you go with the xe262's the Comp book says custom tuning is not required, but of course I would anyway I'm sure it will give a few extra ponies. Good luck
that has forged pistons, new rings, bearings, rods........ Stage 2 PI heads from Heads up Performance, 30lb injectors and the xe278 cams . I am going to run a blower on the motor as well, so with the ported heads and the blower the 278's were the best choice for the maximum power from the combo. Custom tuning is required for me but if you go with the xe262's the Comp book says custom tuning is not required, but of course I would anyway I'm sure it will give a few extra ponies. Good luckThe cheapest place I know of for Comp Cams is http://www.modularperformance.com. If it was my car, I would look at the Comp 270's as well, if you plan on staying N/A.
98blackmagic
New Member
Yea those would be a good choice but they recomend ported heads with those cams, all for the better though, more POWER!
Dark Knight GT
I can't get it up......ok that didn't sound right.
Does anyone have the specs on the Comp Cams for a wild n/a set up ? I'm looking for something in strict competition with VT Engine Stage II cams. Thanks.
I got my first set of Comp cams on a group purchase from somewhere that I don't remember. They were custom grinds spec'd out by Dennis Miles from Comp. I made 560 rwhp with them. I got my second set from Modular Powerhouse as part of my engine rebuild they did. They were spec'd out by Tim along with his race ported heads and larger valves. I made 660 rwhp with these. I recommend a set of custom Comp cams from MPH.
Dark Knight GT
I can't get it up......ok that didn't sound right.
Alright, that sounds cool. I'll probably look into getting a set of custom cams then, but the VT Engine Stage II cams for some odd reason look pretty good. I've looked at the Stage III cams for a n/a application on Modular Performance home page, and they all seem to have a 113 lsa. Wouldn't a tighter lsa, like say "108" be better for a n/a application ? I know that is what VT Engine uses on theirs, and they make good power.
streetstang03
unModerator
are custom grind Comp Cams with these specs ok for a n/a daily driver?
Specs:
Duration:
Intake@50: 234
Exhaust@50: 242
Lobe Separation: 114 degree.
Valve Lift: 550.
RPM Range: 1800 to 6000 RPMs.
Specs:
Duration:
Intake@50: 234
Exhaust@50: 242
Lobe Separation: 114 degree.
Valve Lift: 550.
RPM Range: 1800 to 6000 RPMs.
Dark Knight GT
I can't get it up......ok that didn't sound right.
The lobe seperation seems fine for daily driving. The lift specified is 550, but is that for both the intake and exhuast ? If both the intake and exhuast have the same lift, it sounds like a blower cam. For a n/a application, you probably want a bit more on the exhuast side than the intake. The duration seems fine as well.streetstang03 said:
streetstang03
unModerator
Dark Knight GT
I can't get it up......ok that didn't sound right.
Anyone have any good tech articles on learning more about cams for the 4.6ltr ? I'm going to come up with my own custom cam design for my application, and I think I need to know more about how the cams work on the 4.6.
Dark Knight GT said:
If had the need for custom cams I'd let the pros do the specs. Companies like 'Motor Machine & Supply' in Tucson Arizona use a master software program to calculate the best cam events for an application. Computations are based on many top-notch profiles developed by several of the major cam manufacturers, and the service is relatively inexpensive. As far as I know, most specs they do are for track cars and the results are highly reliable.
Nevertheless I'm ok with the specs on OTS Comp 270's
.
Dark Knight GT
I can't get it up......ok that didn't sound right.
Alright, cool. I guess I'll leave it up to the pro's to decide on then. I was just having another one of my "brain storms", and just figured I'de look into it.
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