Camshaft Options (Speed Density)
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Junior User
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Camshaft Options (Speed Density)
Hey all,
I have an 86 f-150 with the 302 EFI.
I'm looking to get a cam, specifically trying to decide between 2 cams.
The comp cams 31-255-5 or the crane 444232
I know the comp cams has slightly higher lift then the crane, and the crane has slightly more duration on the exhaust side.
My question is, for the people who have used either of these cams, what are your experiences? Which cam will produce more lowend torque v.s. an overall broad powerband?
Also, did you see any change in gas mileage? (positive or negative)
And will either of these cams change the sound of the exhaust?
Thanks!
I have an 86 f-150 with the 302 EFI.
I'm looking to get a cam, specifically trying to decide between 2 cams.
The comp cams 31-255-5 or the crane 444232
I know the comp cams has slightly higher lift then the crane, and the crane has slightly more duration on the exhaust side.
My question is, for the people who have used either of these cams, what are your experiences? Which cam will produce more lowend torque v.s. an overall broad powerband?
Also, did you see any change in gas mileage? (positive or negative)
And will either of these cams change the sound of the exhaust?
Thanks!
More Turbo
Joined: May 2003
Posts: 520
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No experance with the cams, but do know the heads/pistons are a little diferent on the 86 motor. Might want to check piston to valve clearance on them.
As for sound? Any cam that is SD frendly will realy not sound much diferent. Its the "lope" that makes the comp go screwy
As for sound? Any cam that is SD frendly will realy not sound much diferent. Its the "lope" that makes the comp go screwy
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Both will be a significant upgrade over the stock cam, more power everywhere. The sound of the motor will change, but not drastically, maybe a bit louder depending upon the exhaust system. A motor that produces more power can get better milage, but often the driver can't resist using the extra HP around town 
so milage may suffer. My experience is city milage goes down and hwy milage goes up.
Valve clearance is not a problem with E6TE heads on truck motors.. if that is what this vehicle has. The exception was the mustang HO motor from '86 that had flattop pistons, truck motors will have dished pistons so there is more clearance. Even then I do not believe there are clearance issues for either motor with short duration cams under 0.500" lift.
so milage may suffer. My experience is city milage goes down and hwy milage goes up.Valve clearance is not a problem with E6TE heads on truck motors.. if that is what this vehicle has. The exception was the mustang HO motor from '86 that had flattop pistons, truck motors will have dished pistons so there is more clearance. Even then I do not believe there are clearance issues for either motor with short duration cams under 0.500" lift.
Posting Guru
Joined: Nov 2004
Posts: 2,155
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From: sunny fla sometimes windy
Why not go with roller rockers with 1.7:1 for added lift it is the same as adding a cam!!
Plus the added benefit of the roller for less wear and friction which frees up more ponies. It will take a lot less time and will give you a good HP boost for about $170.00.
Plus the added benefit of the roller for less wear and friction which frees up more ponies. It will take a lot less time and will give you a good HP boost for about $170.00.
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well time isn't really an issue for me, i will do it as a learning project over christmas break. plus, i know atleast the crane cam+lifter kit is about $170 as well. the cam would produce a much larger improvement then changing the lifters, wouldn't it?
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Originally Posted by bedmondo
the cam would produce a much larger improvement then changing the rockers, wouldn't it?
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Junior User
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does anybody know if the comp cams comes with lifters? if not, that would push the total cost way up...unless I can use the stock lifters? (50k miles) I believe the comp cams is a little better then the crane correct? (more lift)
conanski, I know you have the crane 444232, what are your opinions on it v. the comp cams in my little 302?
conanski, I know you have the crane 444232, what are your opinions on it v. the comp cams in my little 302?
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Junior User
Joined: Oct 2007
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From: BFE, MO
I don't believe the Comp cam is available with lifters as a kit. At least not thru Summit or Jegs. I just bought the Crane for the same reason. Plus I have had great experiences in the past with Crane (not to say I have had any bad ones with Comp).
The lift is a touch higher on the Comp cam but in comparison to the stocker I think its not enough to worry about. I won't have my engine back together for another 2 weeks so I have no actual opinion on it until then.
The lift is a touch higher on the Comp cam but in comparison to the stocker I think its not enough to worry about. I won't have my engine back together for another 2 weeks so I have no actual opinion on it until then.
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Senior User
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From: Murfreesboro, TN
Heres another option that is less expensive : the replacement cam for a 351W.....http://www.northernautoparts.com/Pro...tModelId=11115
Doesn't have as much lift as the COMP or Crane, but is half the cost. Plus that extra money can go to new lifters (mandatory on a hydraulic flat tappet cam) and a new roller timing chain...
Doesn't have as much lift as the COMP or Crane, but is half the cost. Plus that extra money can go to new lifters (mandatory on a hydraulic flat tappet cam) and a new roller timing chain...
FTE Legend
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From: Ottawa, Ontario
Originally Posted by KDPate
Heres another option that is less expensive : the replacement cam for a 351W.....http://www.northernautoparts.com/ProductModelDetail.cfm?ProductModelId=11115
FTE Legend
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From: Ottawa, Ontario
Originally Posted by bedmondo
i thought that people ran the 351 cams with no problem...just have to switch the plug wires to match the 351 order don't you?
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well, i was thinking of doing a mass-air swap at the same time, because it would make everything cheaper/more efficient in the long run. do you think there would be a better cam for me to choose if i went with mass-air instead? Then i could successfully run the 351 cam with no compatibility issues with the mass-air system.
Senior User
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From: Murfreesboro, TN
Originally Posted by Conanski
I can't recommend that cam for 2 reasons, the duration is way too long for a 302 truck motor, and the plug firing order won't match the 302 injector firing order(even though it's batch fire it will cause idle issues). Actually that's a strike against the 444232 as well in this case....
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