8Stack efi & manifold vacuum pressures

[bobcowan]

Originally Posted by Skuzzy

Bob, which ignition system did you go with?

I am considering Megasquirt for my engine build as well and would like to get away from distributors while I am at it.

I'm using a wasted spark coil pack, distributorless ignition. The MSII/Extra ECU controls the ignition directly, and does not need an EDIS module.

It works really well, and you gain an amazing amount of control over the ignition. It's very easy to program the ECU to control the ignition like no distributor can. I used wasted spark because it's very efficient and relativly inexpensive. It also adds a slightly different exhaust note.

Of course, without a distributor, you need something to drive the oil pump. I had an old distributor lying around that I took apart.

[Dwight]

Bob
I was doing some research on a distributorless ignition system for my 302. Can you buy a replacement for the distributor to drive the oil pump? What available?

Coach has a 408 that may needs a distributorless system. He has a Comp cam but Comp made a few of their cams out of very hard blanks. Thus any distributor gear he uses is eat up by the cam gear. Any suggestions?

Dimis, sorry for the side track of your thread.


Dwight

[legenmetals]

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Art Chrisman converted a Hilborn mechanical with a Hilborn carabine electronic system. The stainless steal lines are vavum lines that run to a common block.

[bobcowan]

Originally Posted by Dwight

Bob
I was doing some research on a distributorless ignition system for my 302. Can you buy a replacement for the distributor to drive the oil pump? What available?

Coach has a 408 that may needs a distributorless system. He has a Comp cam but Comp made a few of their cams out of very hard blanks. Thus any distributor gear he uses is eat up by the cam gear. Any suggestions?

Dimis, sorry for the side track of your thread.


Dwight

I don't remember the year that Ford went to a distributorless ignition system in the 5.0W. In any case, they used a cam position sensor in place of the distributor. You could use one of those, either new or from the bone yard. I simply cut down an old distributor.

Comp Cams supposedly has a composite gear that should work. If it eats that one too, you can either replace the cam shaft or use an external belt driven oil pump.

[Dimis]

Originally Posted by Dwight

Dimis, sorry for the side track of your thread.


Dwight

No worries at all Dwight,
1) I don't really see it as a hijacking, but more evolving the discussion to a conjoining topic.
2) The info and knowledge is relevant and appreciated.
&
3) I'm not that precious...

[Dwight]

Dimis
Thanks


Bob

the composite gear lasted 13,000 miles and three teeth broke off. Had to called a tow truck to get us home.

Lunati make a new steel gear, just came out this year, it's the lastest and greatest but it only fits stock distributors not the MSD.

Coach does not want to change the cam but I think he will have to.
He has been talking to Keith Craft, Comp, Lunati and MSD about the problem.
For now it's a new composite gear.

If anyone is using a Comp cam in a 351W motor that was manufacted in 07 -08 I would pull it and check. Some have failed within 3,000 miles.

Dwight


Dwight

[redmt]

The new MSD I got for Rons 351 came with a steel gear and they are available separately.

[Dwight]

redmt

this batch of Comp 351W cams eat up steel, brass and composite gears!!!!


Dwight

[redmt]

I was sort of jumping in and out of the thread and wasn't following it too closely.

[blykins]

Originally Posted by Dwight

redmt

this batch of Comp 351W cams eat up steel, brass and composite gears!!!!


Dwight

Bronze gears don't seem to last long anyway.

If it's eating iron and steel gears, then I would look to how it's installed on the distributor. There is a spec dimension on how the gear should be installed, you can't just line the holes back up and put the pin in.

Roller cams are either an austempered core, which requires an iron gear, or they're a steel core, which needs a steel gear, composite, etc.

[Caprimaniac]

Originally Posted by blykins

Bronze gears don't seem to last long anyway.

If it's eating iron and steel gears, then I would look to how it's installed on the distributor. There is a spec dimension on how the gear should be installed, you can't just line the holes back up and put the pin in.

Roller cams are either an austempered core, which requires an iron gear, or they're a steel core, which needs a steel gear, composite, etc.

x 2 on that. Take front cover off and check block to gear clearance.

On gears: I used to think that the Billet steel (mech & hyd roller) cams were alot harder than the "Cast" cams. But the opposit is the case. On billets you should use softer gears like composite or bronze.
On cast cams: steel/ iron gear. It has always worked for me.....?

RS

[bobcowan]

Originally Posted by Dwight

Dimis
Thanks


Bob

the composite gear lasted 13,000 miles and three teeth broke off. Had to called a tow truck to get us home.

Lunati make a new steel gear, just came out this year, it's the lastest and greatest but it only fits stock distributors not the MSD.

Coach does not want to change the cam but I think he will have to.
He has been talking to Keith Craft, Comp, Lunati and MSD about the problem.
For now it's a new composite gear.

If anyone is using a Comp cam in a 351W motor that was manufacted in 07 -08 I would pull it and check. Some have failed within 3,000 miles.

Dwight


Dwight

The difference between the stock distributor and the MSD is the size of the shaft. I believe the MSD is larger. Buy the gear for the stock shaft and have it reamed to the proper size.

But, if it were my engine, I'd get rid of the cam. Since it was not manufactured properly, it's always going to be a problem. It will probably eat the new MSD gear, too. For reliability reasons, it would have to go. You're probably talking about $300 and one afternoon's work.

[Caprimaniac]

Looking at what MSD gears are available for the 302, all are the small .466 dia and some the large .531"

Is there a third, larger diameter MSD?

When I changed the distributor for a OE cam phase sensor, I first ordered a Comp .466" gera, which did not fit the CPS.... The shaft was 0.531 diameter, so I had to order in another one....

[vector1]

i have a billet cam, and the maker said i could use anything on the distributor i wanted.