302 ford motor question.
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From: Las Vegas, Nevada
302 ford motor question.
hi guy's, I have a 54 ford pu with a [supposedly] 84-86 302 motor I looked at several motor manuals and they say to look at the decal under the hood for the correct timming degree setting. From the 70's to 80's there are different settings fron 6 degrees btc to 14 degrees btc any one know what the setting is for an 84-86. I installed a little hotter cam and lifter set from edelbrock and chain and sprocket. I also put in a edelbrock 600 series carb. The motor starts right up but sounds a little rough at idle. My spark plugs are caked with black carbor [not wet] so I think it is probally timming. I took it out for a little spin and it definately has no power. oops I forgot to say I also put in a mallory distributor cuz I couldn't get that darn dura spark piece to work. Its running with no back fire but it runs like do do . I have no idea what this motor came out of. any help would be appreciated. bill
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From: Kalispell, MT
I'll confuse you a little more probably. '86 was the first EFI and initial timing is 10 deg BTDC. Plugs I'm using are Autolite AP 24's. Stock plugs call for ASF 42 and gap .042-.046
I've got a rad support with a sticker from an '83 and it says 8 deg BTDC. Also, stock plugs call for ASF 42 and gap .042-.046
Earlier 302's used Autolite 45's and I used to gap them .035
You might want to check with Edelbrock and see what they recommend for timing with the cam you're running.
Funny the Duraspark II didn't work for you - they're just about bulletproof.
I've got a rad support with a sticker from an '83 and it says 8 deg BTDC. Also, stock plugs call for ASF 42 and gap .042-.046
Earlier 302's used Autolite 45's and I used to gap them .035
You might want to check with Edelbrock and see what they recommend for timing with the cam you're running.
Funny the Duraspark II didn't work for you - they're just about bulletproof.
Last edited by mtflat; Oct 26, 2006 at 12:43 AM.
Fleet Owner
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From: NM
What kind of Mallory is it? If it's not a jigh-energy type system (i.e., just points) it may not fire the large gaps. If it's an electronic dizzy, what are you using to fire it, an MSD?
If it's an 86 it was probably a CFI (throttle body fuel injection) engine, somewhere in there they transitioned to multi-port EFI on the high-end cars. If it was CFI they had really low compression and were only rated 125 HP, so don't know how well it will respond to hot rodding.
If it's an 86 it was probably a CFI (throttle body fuel injection) engine, somewhere in there they transitioned to multi-port EFI on the high-end cars. If it was CFI they had really low compression and were only rated 125 HP, so don't know how well it will respond to hot rodding.
Lead Driver
Joined: Oct 1999
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From: Kalispell, MT
Originally Posted by ALBUQ F-1
If it's an 86 it was probably a CFI (throttle body fuel injection) engine, somewhere in there they transitioned to multi-port EFI on the high-end cars. If it was CFI they had really low compression and were only rated 125 HP, so don't know how well it will respond to hot rodding.
However, my '86 was built in Canada Oct 86 - it should have been an '87 by some counts, so it is a combobulation of parts.
Postmaster
Joined: Apr 2004
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From: Santa Clarita
It's really hard to say why it's running like "po po". It could be a number of things, including the ignition wires being bad, carb needs to be rebuilt, vacuum leaks etc. I would start at changing the plugs and plug wires. then vacuum leaks at the manifold/ hoses and then the carb.
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Lead Driver
Joined: Aug 2002
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From: Saskatoon SK Canada
The Ford CFI was from 83-85 and some '86 models. In '86 5.0L truck and Mustang engines got the new EFI setup but the Mustang was sequential injection instead of batch fired. I have a '84 Mustang 5.0L CFI engine in my '51 but I have went to the later Mustang SEFI. My engine stock was 165hp and 8.4:1 compression. In '85 when they put the shorty headers in the Mustangs, the CFI (CFI's didn't get the roller cam) were then rated at 180hp.
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From: Near Fresno, California
Who is talking efi? he states: "I installed a little hotter cam and lifter set from edelbrock and chain and sprocket. I also put in a edelbrock 600 series carb. "
I expect he has a carb on his engine - and 600 cfm is a lot of carb for 302 cubic inches.
To answer his question, why not use a vaccum gage instead of a timing light to set your timing? Set it for best vacuum at idle, then check what it is using your timing light. The idle jets and the idle speed adjustment interact, so you have to go back and forth between the two, looking for a smooth idle at around 800 RPM.
This changes a bit with timing, so there is 4 items you have to adjust at the same time - the two idle jets, the idle speed, and the timing.
It sounds like you are a bit over carb-ed, my guess is that you will need to play with all your carb adjustments and jet sizes to get good performance and drivability. Also, remember that your cam can cause problems with your idle.
Good Luck, and please post back what works.
.
I expect he has a carb on his engine - and 600 cfm is a lot of carb for 302 cubic inches.
To answer his question, why not use a vaccum gage instead of a timing light to set your timing? Set it for best vacuum at idle, then check what it is using your timing light. The idle jets and the idle speed adjustment interact, so you have to go back and forth between the two, looking for a smooth idle at around 800 RPM.
This changes a bit with timing, so there is 4 items you have to adjust at the same time - the two idle jets, the idle speed, and the timing.
It sounds like you are a bit over carb-ed, my guess is that you will need to play with all your carb adjustments and jet sizes to get good performance and drivability. Also, remember that your cam can cause problems with your idle.
Good Luck, and please post back what works.
.
Lead Driver
Joined: Oct 1999
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From: Kalispell, MT
*****, I started talking about efi's 'cause his original question included '86's which were efi's. I figured the plug gap and initial timing might be different.
I agree with you about the over-carb issue. My son in law runs a 82 mustang with a 302/edelbrock intake/comp cam/570 cfm street avenger, etc. It's about all the carb that 302 can handle.
I agree with you about the over-carb issue. My son in law runs a 82 mustang with a 302/edelbrock intake/comp cam/570 cfm street avenger, etc. It's about all the carb that 302 can handle.
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