what distributor?

79nautique wrote: efficiency =        lean mixture =            hotter engine temp =                      less fuel used =                             lower rpms performance =       rich mixture =           cooler engine temp =                     more gas used =                             high rpm = Like I said earlier the duration will not change due to the gap being increased.

Now I know we disagree

Your description of rich vs. lean may have some degree of truth to it, but it certainly does not tell the whole story. Did I mention that I dropped 4/8 jet sizes (front/rear) and picked up 200 RPM this year? That tells me there is such a thing as TOO rich. I couldnt find the quote, but I believe Gottaski said something about achieving the best performance by being just a tad richer than "too lean."

I agree that the a larger plug gap does not equate to a longer duration spark. However, it seems reasonable to me that the longer spark duration of the DUI (due to the cap and rotor design) does contribute to a more complete burn. The larger plug gap that can be run with the DUI probably has more to do with the higher output coil.

Man I love it when you guys talk like this.

Chris; I am having trouble with my distributer again (I think) so please hurry back down here and get me fixed up. You know I have no chance of understanding all this.

john

jbear, I'm definitely not Chris, but I wouldn't mind at all taking a look at your boat for you. I'm in Lakeland, and I am near Lake Wales pretty often. What kind of problems are you having? Chris, I don't mean to try and step in, but I would help if I could.

I wouldn't mind at all tuning the points or installing a conversion. I would love to see that boat in person anyway.

I guess you may be right on the Mallory/HEI argument (looks stock), but I really don't know why it's easier to recurve. It's just the HEI just comes naturally to me. You know, because I'm used to working on motors with REAL power.   Just a little banter to tick off all you Ford guys. I must say, I have been very impressed with the performance of my 351w.

I see your point on the Mallory, but not so much on the HEI. You can limit the advance with bushings that you put on the posts. As for the weights, you can grind on them til you get the curve you want, and play with springs. I did some grinding on the 'dog-leg' of the weights to give me more advance (I wasn't getting enough).

Ok, so what about Kelpos coil question. Sorta hard to find a place to mount anything but a round coil under the hood. Anyone using the Promaster series or anything other than the standard round style? Where are you mounting it?

79nautique wrote: hate to tell you that DUI unit isn't any different than any other stock HEI dist from the 70's-80's module included, might use a module from a corvette motor set-up but that's about it.

I didnt claim it was a new design- but if it works, it works. Im unaware of any other HEI marine distributor made to work on Fords. Its true that standard GM HEI parts will drop right in, but the DUI module is better than the run-of-the-mill stuff you get at Autozone (I lost 200 RPM when I tried the cheap module).

79nautique wrote: The HEI is a good unit but it doesn't belong on a ford motor and with the Mallory it looks stock, is easier to re-curve for any cam/engine combination and has better performance overall and cost less so to me it's a no brainer, Mallory.

I think the DUI looks good on my motor, but to each their own. Both the Mallory and DUI can be recurved, but if you say the Mallory is easier Ill believe you. Id be curious to see if there was a performance difference between the 2- I havent seen that documented yet. I do know that I gained 200 RPM on a stock motor by going to the DUI, so that sold me. As for price, the $375 would have bought me either the DUI or the Unilite and a new coil, so it was basically a wash.

79nautique wrote: Oh what is that BS that just came out of your mouth Tim the DUI is only one wire, well not exactly, postive lead and a negative lead, what there isn't a neg lead on the DUI then what the f**k is that second wire for, oh the Tach you say, and what the f**k is that, a second lead that grounds the unit my friend.

Last time I checked, the tach signal wasnt a simple ground. By losing a few wires and the remote mounted coil, the DUI looks cleaner to me- but I certainly wouldnt call the stock set up messy. If I already had a good coil and plug wires, I wouldnt hesitate to go with the magnetic Mallory on a future project.

81nautique wrote: Ok, so what about Kelpos coil question. Sorta hard to find a place to mount anything but a round coil under the hood. Anyone using the Promaster series or anything other than the standard round style? Where are you mounting it?

you don't remember where I had mine mounted at? used that very same coil, made a bracket out of 404 stainless steel, used two of the intake bolts to mount the bracket it was pretty easy to do.

And Tim why are you buying cheap ass sh*t from Autozone, get a Delco module and you won't see any difference, also take a look around the base of your dist, the machined OD section that the cap sits on and I bet you find a stamped 7-8 digit part number on. Do you really think they had a special casting made to work on the ford block.

No I wouldn't suggest you do it, might not work after your done with it anyway, but Me personelly I could, but I do have an advantage since I worked for them and know how to run a lathe or machining center as well.

My point is there are already base housing out there that can easily be machined a little or are an exact fit all ready that would work. Perf Dist isn't doing anything fancy other than marketing, and are using off the self items to build the dist. they sold you.

if I had the boar still no problem. Search and you will find a picture of my motor on hear. I'll check and see if I still have a shot down here on monique's computer to post.

thanks, that looks like the way i will go with mine, the fresh water cooling might get in the way. hopefully it will be running this weekend

that motor looks slow!!

closed cooling has anti-freeze in it so how fresh is the water really?

MM, I prefer the Zephyrhills brand myself, you know, keep it local. That's funny.

79, about the casting of the HEI. It is not a GM casting. I believe the castings for these Ford HEI distributors are coming out of Austrailia. They are really good castings too. I think that ProComp is making them...I bet DUI is buying blank castings from them and building theirs.

since my boat is strictly in saltwater, and my history is with salt water boats, fresh water cooling is the term used locally. but, yes, i am putting antifreeze, heat exchanger, etc in my baby. saltwater will still be in the manifolds though. i have been looking at those hi tek stainless manis, but, they probably cost more than my boat. they look fabulous and i bet flow much better than the cast iron osco pigs.
anyone know the cost of the hiteks?