cams
 

Whats a good torque cam?

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66' Mustang 2bbl 289 coupe, stock.
79' Mustang soon to be a 302-selling-
89' Bronco 351w
AIRMEN FIRST CLASS
KASPAR T. HOWE

First, it depends on engine size - a bigger engine will get the same operating range on a bigger cam as a smaller engine will on a smaller cam. For around 300 cubes - you want a cam with about 200 to 210 intake duration at 050 lift max. That will give you a torque peak of around 3000 to 4000. The more lift, within reason, the better. For a moderate modified engine, somewhere around .400 to .500 lift. Hydraulic roller cams give more torque for the same duration because their opening and closing ramps can be steeper, but for a non-roller block, you have to use Crane's retrofit hydraulic rollers at about $400. Probably not worth it for a moderate engine. by all means check the cam mfg websites, they give operating ranges etc. www.compcams.com, www.holley.com for Lunati, www.iskycams.com, www.cranecams.com to mention a few. You want a fairly tight lobe center angle, like 110 or 108 which will give you more low and mid-range. A single pattrn cam (same duration both intake and exhaust) is also better for low and mid-range torque. One good example is Comp Cams Hi Energy 268. You can also check out some stock Ford hydraulic non-roller cams at quite reasonable prices at www.oemfordparts.com For good torque, use a 4bbl dual plane intake like a Performer, and a small 4bbl vac secondary like 500 to 600 for a 300 size motor. If you want to use headers, tri-Y's are best torque headers, or a small tube 4 tube with long primaries and long collectors, even with full exhaust.

Thank you for your help. Right now my 289 has a stock 2bbl; headers-full length headmen; stock cam and stock timing; cherry bombs with 2¼" pipes coming out in front of the rear tires. I want to change the pipes to 2½"; get a holley 500 cfm 2bbl, or, if that doesn't cut it, put a holley 650 cfm with adapter on my stock 2bbl manifold. I want to keep the stock manifold on.

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66' Mustang 2bbl 289 coupe, stock.
79' Mustang soon to be a 302-selling-
89' Bronco 351w
AIRMEN FIRST CLASS
KASPAR T. HOWE

If you want to keep that intake, get in touch with Rich at Circle Track Carbs. He is the best! You'll get more power from a 500 he built than from a 600 you bought. Besides, you don't want to adapt a 4bbl to your 2bbl intake. Trust me.

Take care,
-Chris

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Retired Moderator
MustangNet

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Thanks, I will look him up.

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66' Mustang 2bbl 289 coupe, stock.
79' Mustang soon to be a 302-selling-
89' Bronco 351w
AIRMEN FIRST CLASS
KASPAR T. HOWE