cams

mustangman65_79 · 11-05-2001, 08:49 AM

Whats a good torque cam?

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

macx · 11-06-2001, 12:35 AM

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.

mustangman65_79 · 11-07-2001, 07:03 AM

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.

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

PKRWUD · 11-07-2001, 08:11 AM

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

------------------
Retired Moderator
MustangNet

My site: Peckerwoods Pit Stop

My teams site: Jim Porter Racing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

mustangman65_79 · 11-10-2001, 07:54 AM

Thanks, I will look him up.

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

11-05-2001, 08:49 AM	#1
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	cams Whats a good torque cam? ------------------ 66' Mustang 2bbl 289 coupe, stock. 79' Mustang soon to be a 302-selling- 89' Bronco 351w AIRMEN FIRST CLASS KASPAR T. HOWE

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11-06-2001, 12:35 AM	#2
macx Registered Member Join Date: Oct 1999 Location: Gordonville MO USA Posts: 448	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.

11-07-2001, 07:03 AM	#3
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	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. ------------------ 66' Mustang 2bbl 289 coupe, stock. 79' Mustang soon to be a 302-selling- 89' Bronco 351w AIRMEN FIRST CLASS KASPAR T. HOWE

11-07-2001, 08:11 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	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 ------------------ Retired Moderator MustangNet My site: Peckerwoods Pit Stop My teams site: Jim Porter Racing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

11-10-2001, 07:54 AM	#5
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	Thanks, I will look him up. ------------------ 66' Mustang 2bbl 289 coupe, stock. 79' Mustang soon to be a 302-selling- 89' Bronco 351w AIRMEN FIRST CLASS KASPAR T. HOWE