[Martin_T]

Hi

I have an 86 302 block with a 347 stroker kit. I have fitted an after market Lunati Cam. I want to fit a mechanical fuel pump and am unsure on a) what a fuel pump eccentric does (having never had a mechanical fuel pump before), and b) is this the correct one that I need (link below)?

Thanks

Martin

Ford Racing Fuel Pump Eccentrics M-6287-C302 - SummitRacing.com

 

[Martin_T]

Also, what is the difference between a one piece and a two piece eccentric (apart from the obvious!!!), and which one do I need?

Thanks

Martin

 

[KULTULZ]

Before we go any further, was there any direct instructions on the CAM TECH SHEET referring to what type of eccentric to use? You are also going to need a dowel pin and those are specific to the one piece and two piece eccentric. Do you have a mechanical fuel pump provision on your front cover?

The cam drive style and cam gear design is going to dictate the correct eccentric style.

...oh...

The eccentric initiates the fuel pump fulcrum arm.

Here is some more info-

Camshaft Dowel Pin/Fuel Pump Eccentric

Two different length dowel pins were used in the front of the cams in 221-351W engines. In 1972 and earlier engines, a longer (1.375”) dowel pin was used so that it would extend through the one piece fuel pump eccentric used on these engines. The 1973 and later engines utilized a two piece fuel pump eccentric which required a shorter (1.125”) dowel pin. If no eccentric is used, a thicker than standard retaining washer must be used to make up for the thickness of the eccentric. The cam gear MUST be pulled tightly against the snout of the cam. If the gear is not tight against the step at the front of the cam the bolt will come loose and engine failure is sure to occur.



Dowel pin failure is fairly common in Small Block Ford engines. This is almost never the result of a defective or soft dowel pin. It is most often caused by the bolt in the center of the cam coming loose and allowing the dowel pin to be loaded and shear. The center bolt should always be torqued to the manufacturer’s specification and a suitable thread lock used to prevent the bolt from coming loose.

 

[Martin_T]

Before we go any further, was there any direct instructions on the CAM TECH SHEET referring to what type of eccentric to use? You are also going to need a dowel pin and those are specific to the one piece and two piece eccentric. Do you have a mechanical fuel pump provision on your front cover?

The cam drive style and cam gear design is going to dictate the correct eccentric style.

...oh...

The eccentric initiates the fuel pump fulcrum arm.

Here is some more info-

Camshaft Dowel Pin/Fuel Pump Eccentric

Two different length dowel pins were used in the front of the cams in 221-351W engines. In 1972 and earlier engines, a longer (1.375”) dowel pin was used so that it would extend through the one piece fuel pump eccentric used on these engines. The 1973 and later engines utilized a two piece fuel pump eccentric which required a shorter (1.125”) dowel pin. If no eccentric is used, a thicker than standard retaining washer must be used to make up for the thickness of the eccentric. The cam gear MUST be pulled tightly against the snout of the cam. If the gear is not tight against the step at the front of the cam the bolt will come loose and engine failure is sure to occur.



Dowel pin failure is fairly common in Small Block Ford engines. This is almost never the result of a defective or soft dowel pin. It is most often caused by the bolt in the center of the cam coming loose and allowing the dowel pin to be loaded and shear. The center bolt should always be torqued to the manufacturer’s specification and a suitable thread lock used to prevent the bolt from coming loose.

Thanks for that information.........I'm learning all the time!! I got two different length dowel's with the Cam (Lunati Voodoo). Will read instruction sheet when I get home but can't remember anything about the Eccentric.
I havn't got a front cover yet...............so I guess the next question is which one to get!!??

Thanks

Martin

 

[cmefly]

Comp cams kit #235 will have the correct 2 piece eccentric and dowel pin you need. Use the older style timing cover from a 289,302 or 351W

 

[PSIG]

Comp cams kit #235 will have the correct 2 piece eccentric and dowel pin you need. Use the older style timing cover from a 289,302 or 351W

+1. You'll note the FMS catalog shows two 1-pece eccentrics. The difference is the metal they're made from. That difference is based on the metal your fuel pump arm is made of - stamped steel or cast iron. While the retaining bolt hole is different to match the original pump type - that doesn't apply to you or any that have had the pumps replaced. The easy choice is to use the 2-piece which works with either and has longer life to boot.

David

 

[Martin_T]

+1. You'll note the FMS catalog shows two 1-pece eccentrics. The difference is the metal they're made from. That difference is based on the metal your fuel pump arm is made of - stamped steel or cast iron. While the retaining bolt hole is different to match the original pump type - that doesn't apply to you or any that have had the pumps replaced. The easy choice is to use the 2-piece which works with either and has longer life to boot.

David

Hi, thanks for the information.

I have a Cloyes roller timing set. Will the two piece eccentric be OK with that? I spoke to Lunati (my Cam manufacturer) and they said I would be OK with the two piece with my Cam, but I forgot to ask them about the timing set, and I have read on the net that some timing sets can only use single piece eccentrics.

Thanks

Martin

 

[KULTULZ]

Then you will have to read the CLOYES INSTRUCTION SHEET.

 

[cmefly]

Hi, thanks for the information.

I have a Cloyes roller timing set. Will the two piece eccentric be OK with that? I spoke to Lunati (my Cam manufacturer) and they said I would be OK with the two piece with my Cam, but I forgot to ask them about the timing set, and I have read on the net that some timing sets can only use single piece eccentrics.

Thanks

Martin

Yes , that comp cams kit #235 is the correct eccentric.

 

[KULTULZ]

Yes , that comp cams kit #235 is the correct eccentric.

You heard it here. The above poster confirms this kit is compatible with all installations. If you experience any variation/failure, I am sure he will be willing to cover your costs.

http://static.summitracing.com/global/images/instructions/cca-235.pdf

Now, have you actually read the CLOYES INSTRUCTION SHEET?

Cloyes Gear & Products, Inc. - Street True Roller Sets

CLOYES (Street True Roller?)

FORD Small Block V8

1 PC Eccentric - Kit No 9-1135
2 PC Eccentric - Kit No 9-1138

 

[Martin_T]

You heard it here. The above poster confirms this kit is compatible with all installations. If you experience any variation/failure, I am sure he will be willing to cover your costs.

http://static.summitracing.com/global/images/instructions/cca-235.pdf

Now, have you actually read the CLOYES INSTRUCTION SHEET?

Cloyes Gear & Products, Inc. - Street True Roller Sets

CLOYES (Street True Roller?)

FORD Small Block V8

1 PC Eccentric - Kit No 9-1135
2 PC Eccentric - Kit No 9-1138

It all becomes clear eventually!!!

Thanks guys.

Martin

 

[Mroldfart2U]

FORD Small Block V8

1 PC Eccentric - Kit No 9-1135
2 PC Eccentric - Kit No 9-1138

Not picking Kult, but that is good info for someone that ALREADY has one or the other styles of Eccentrics. He has NONE, so the choice is his as to which he wants to use. The 1 piece or the 2 piece, then choose the Timing set accordingly. M2C.

 

[KULTULZ]

Not picking Kult,

Yes you are...

... but that is good info for someone that ALREADY has one or the other styles of Eccentrics. He has NONE, so the choice is his as to which he wants to use. The 1 piece or the 2 piece, then choose the Timing set accordingly. M2C.

I swear I read where he has already bought the timing kit.

Now, the question is what cam gear was designed for which eccentric type.

Trying to prevent that time old honored tradition of clamping down on the front cover and she cracks or the dowel is incorrect.

Guess I will have to wait on my FMF FRONT CAM DRIVE CERTIFICATION also...

I will withhold future participation.

 

[cmefly]

You heard it here. The above poster confirms this kit is compatible with all installations. If you experience any variation/failure, I am sure he will be willing to cover your costs.

http://static.summitracing.com/global/images/instructions/cca-235.pdf

Now, have you actually read the CLOYES INSTRUCTION SHEET?

Cloyes Gear & Products, Inc. - Street True Roller Sets

CLOYES (Street True Roller?)

FORD Small Block V8

1 PC Eccentric - Kit No 9-1135
2 PC Eccentric - Kit No 9-1138

My mistake, Unless he has the HEX adjust timing set then the Comp cams 235 kit will work. No reason to get so upset.

 

[Mroldfart2U]

Yes you are...

Sorry.... He did state i believe that he has a gear set, so he has to know WHICH one he has... In order to get the correct one...


Again apologies......

 

[Martin_T]

Guys

Don't want to cause arguements, just looking for help and advice as I have never done this before!!!

To clear it up, I currently have..........

1986 Ford 302 Roller Block
347 stroker kit (SCAT 9000 crank, KB pistons etc etc)
Lunati Voodoo Cam
Cloyes Performance RollerTiming set 3 x keyways
I have no front cover yet
I have no fuel pump yet

I want to run a mechanical fuel pump and just need to know which Eccentric to purchase.................I think you guys have answered that for me...............(I think)!! I will buy the two piece eccentric, not sure where from.

Thanks for the advice

Martin

 

[Mroldfart2U]

Martin You didnt, but Kult posted the Cloyes part no's so by that you should know which one to get..... If its neither of those 2 no's, then I suppose its a crap shoot either way. (not unless the timing cover come into play)...

 

[PSIG]

Double-post.

 

[PSIG]

2-piece eccentric and Cloyes 9-1138 or better.

David

PS: Some aftermarket cam manufacturers use a 7/16" bolt instead of the typical 3/8". Verify what size your bolt is to match-up. Otherwise, just open the bolt hole up with a 7/16" bit.

 

[KULTULZ]

To clear it up, I currently have..........

1986 Ford 302 Roller Block
347 stroker kit (SCAT 9000 crank, KB pistons etc etc)
Lunati Voodoo Cam

Cloyes Performance RollerTiming set 3 x keyways

I have no front cover yet
I have no fuel pump yet

I want to run a mechanical fuel pump and just need to know which Eccentric to purchase.................I think you guys have answered that for me...............(I think)!! I will buy the two piece eccentric, not sure where from.

Thanks for the advice

Martin

He has already purchased the timing set.