E303 Cam?? Need help ASAP!!
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
pull that cam right away. its not going to work worth a poop. taisa899 put that cam into a vehicle running OBD-II mass air which is totally different then what your dealing with. speed density needs 114* lobe seperation or more other wise the motor will run like crap. that part he showed was a IAC valve that is already on your truck problem is the part shown is for a mustang running mass air. totally different. I suggest you run compcam 31-255-5 this is a computer friendly cam and will give you the low end you need. dont confuse mustang parts with truck parts. they are different animals and should be treated that way.
also you will need to regear to at least a 4.56 gear running 35's. even with the mods you have done it will still be a dog.
just trying to save ya from expensive changes later. good luck
also you will need to regear to at least a 4.56 gear running 35's. even with the mods you have done it will still be a dog.
just trying to save ya from expensive changes later. good luck
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Senior User
Joined: Jan 2007
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I forgot to mention this is the same motor that goes in the 87-93 Mustangs. This isnt the origanal truck motor. That is basically why I choose the cam this is a good cam for these Mustang motors. So the cam should run fine in the motor. So I was thinking since its a Mustang HO 5.0 Motor.
Last edited by 98powerstang; Jan 4, 2007 at 09:35 AM.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
doesnt matter what motor. what matters is the efi setup you are using. if its what came stock in your truck you are SOL wont run worth a poop. if you converted to mass air then you will be ok.
actually if you run the stock HO cam and install some 1.7 rockers you will have something. the stock ho cam will run with speed density due to its lob seperation. many lightning guys run that cam and speed density but you need the rocker ratio to help
actually if you run the stock HO cam and install some 1.7 rockers you will have something. the stock ho cam will run with speed density due to its lob seperation. many lightning guys run that cam and speed density but you need the rocker ratio to help
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
honestly its not worth it. you can spend anywhere from 300-800 to convert. you have to either buy a harness or make one, then locate the proper ecu, mass air meter, add another o2 sensor to your exhaust. speed density can handle most any mod you throw at it except certain cams. swapping the stock ho cam back in would be the better way to go.
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What cam would I be able to use with the setup? The stock cam is in the motor. I have the E303 still in the box and all. I am not sure on what cam I would be able to run. When you first said MAF I forgot what it was for some off reason but now I remember not sure how I forgot. Would I be able to go to the junk yard and have the wiring and MAF sensor pulled from the car he motor came from and used it? I will have all new exhaust ran so I can get the O2 censor put in then. Would the ECU work from the car. If I have an idea what I need then I can get price checks. If thats to much I will just sell the cam and buy another cam that will work with the Computer in the truck. I want a cam thats not full race but is overall better then stock. I want to do the cam while the motor is out then I will save the money for the heads and intakes.
Last edited by 98powerstang; Jan 4, 2007 at 02:51 PM.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
leave the stock HO cam in the motor. sell the cam you just bought and get some 1.7 rockers. keep the stock efi setup and be done. you are driving a 4wd not a mustang so you want to build for torque and at a low rpm. if you are set on buying another cam look into compcam 31-255-5. many use it and have good results.
check out www.fordfuelinjection.com for info on harness stuff. Personally i dont see any gains and the E cam should only be run in a light weight rig like a stang.
check out www.fordfuelinjection.com for info on harness stuff. Personally i dont see any gains and the E cam should only be run in a light weight rig like a stang.
Elder User
Joined: Mar 2004
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The E303 isn't really that mild of a cam. It's lobe seperation angle is 110*, compared to the more typical 112*, or 114* with Speed Density cams. Race cams tend to be 110* and less. With narrow LSA cams, you have the peak tourqe shifted slighty to lower RPM, while at the same time the peak HP point is shifted upward. The result is a flatter power curve, with slightly lower peak numbers, but higher average numbers. The E will make it's peak HP right at 6000 RPM in most hopped up SBF's. It actually has slightly more overlap than the big comp XE282 cam, and idles pretty lumpy even with mass air. It's not as lumpy with a carb.
We had one installed into a 5.0 with speed density for awhile, before we could get it converted to mass air. It would run, but would surge at idle, and would sometimes die sitting at stop lights and so forth..
We had one installed into a 5.0 with speed density for awhile, before we could get it converted to mass air. It would run, but would surge at idle, and would sometimes die sitting at stop lights and so forth..
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Senior User
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I called it a mild cam cause its only the second cam in the Ford Racing series cams and its not a cam you really need to worry on valve to piston clearance like the F303 cam and up. How much did it cost you to convert it to Mass Air Flow and what all did you need for it. I read the diff between MAF and Speed Density. They both have there ups and downs but looked like MAF was better. Any info on what parts you needed and the costs would be great thanks.
Elder User
Joined: Mar 2004
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That was a long time ago, probably in 1993. The Ford Motorsport conversion kits were not as expensive and hard to find as they are now. There were different versions, depending on the tranny, IIRC. The best way to go about it now, is to probably find a wrecked Mustang GT and get the wiring harness, computor, MAF ect...
One really handy thing on either type, is an adjustable fuel pressure regulator.
One really handy thing on either type, is an adjustable fuel pressure regulator.
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Senior User
Joined: Jan 2007
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I got all the wiring for it and the computer. My bro was goin to swap the motor into a Bronco. So I will just get the MAF from the car the motor came from. I will take the truck into the shop tomorrow to drop it off and tell the my mechanic and he will pick up whatever else is needed. Is MAF better then Speed Density?
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Originally Posted by 98powerstang
I will take the truck into the shop tomorrow to drop it off and tell my mechanic and he will pick up whatever else is needed.
Geez... I'm all bummed now. Does anybody get their hands dirty anymore or has TLC ruined the current generation completely. Where's the sense of pride in paying somebody to "build you a ride". Must be the new American way.
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I cant work on my own right now. I had surgery on my shoulder and still dont have full motion and I am off work due to my vertabraes slipping out in my lower back which has brought me to little motion and I need the truck done when I can go back to work. So I dont have much of a choice right now otherwise I do all my work myself if I can. Sorry to bum you out haha. I cant sacrafice the injury on the shoulder because it has cost me $40,000 to get it fully fixed.
