low end cam
Drifting
Joined: Jul 2003
Posts: 1,796
Likes: 1
From: Annandale VA
For low end grunt, you need a bit more advance (say +4), good lift (.580"+), modest duration, not too much overlap, and a tight LSA. A little extra compression also helps.
Comp Cams makes a 218/218 .581" on a 112 LSA, so if you advance it a couple of degrees, you'd be in the ballpark. The old MTI T1 grind (220/220) might also be a good choice, but I think the lift was only .550" or so.
A lot depends on what you consider to be "low end". If you mean off-idle, or at 1500 RPMs or so, you'd have to keep the duration pretty low. If you mean 2500 RPMs, you can go higher in duration.
You might also consider a reverse split grind, like a 224/220 on a 112.
As usual, best bet is to talk to a reputable vendor, tell him exactly what you're looking for.
Comp Cams makes a 218/218 .581" on a 112 LSA, so if you advance it a couple of degrees, you'd be in the ballpark. The old MTI T1 grind (220/220) might also be a good choice, but I think the lift was only .550" or so.
A lot depends on what you consider to be "low end". If you mean off-idle, or at 1500 RPMs or so, you'd have to keep the duration pretty low. If you mean 2500 RPMs, you can go higher in duration.
You might also consider a reverse split grind, like a 224/220 on a 112.
As usual, best bet is to talk to a reputable vendor, tell him exactly what you're looking for.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Most cams do fine in the low end but suffer in most installs due to having insufficient dyna,ic compression. A 228 cam on a 114 for example needs 11.7:1 static compression but due to most people thinking it will not run on pump gas they skimp on bumping it up and leave it in the 11.2:1 area which loses 7rwhp and 10rwtq.
You will do fine in te low end with any cam and the correct CR. 11.4:1 or 11.5:1 works fine with 93 octane on a 224/228 cam and has more low end TQ than stock by far.
If you come across a cam install with less tq than stock, the cam wasnt advanced and is using far too low a static CR.
Hitman is right on the money.
You will do fine in te low end with any cam and the correct CR. 11.4:1 or 11.5:1 works fine with 93 octane on a 224/228 cam and has more low end TQ than stock by far.
If you come across a cam install with less tq than stock, the cam wasnt advanced and is using far too low a static CR.
Hitman is right on the money.
