what distributor? |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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Tim, The DUI on your boat does not look out of place at all, in fact in looks darn good sitting in there. My older boat I didn't think it would look correct. Price wise you are correct and I gave it the same consideration. As part of my rebuild this spring I installed a brand new coil for the EI conversion and a nice set of Plugs wires. I couldn't justify the expense of replacing those components. I believe both systems are more than adequate and it comes down to the specific application and personal preference. |
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You can’t change the wind but you can adjust your sails
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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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).
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.
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. |
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kelpomatic
Newbie Joined: February-21-2007 Location: United States Status: Offline Points: 31 |
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alan,
i ordered the promaster series, and will see if i can make it fit somewhere, after the freshwater cooling is mounted. since my boat is a fish naut i have more room under the hatch than yall, so hopefully it will work. this weekend the motor goes back in! |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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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?
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You can’t change the wind but you can adjust your sails
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Tim; Thanks for the offer. If you are near Lake Wales once-in-awhile you need to stop by for a cold one. Love to meet guys from here. And I would love having the help on the boat. I usually stay out from under the motor box execpt for oil changes. Lots of stuff goin' on under there that I don't understand.
BTW; Are you planning on going to the Orlando Reunion? Drop me a e-mail to the address in my profile and I'll send ya my cell number. You might not be Chris ('course..few are!) but from reading your posts it sounds as tho you know your way around a motor. john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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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).
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Every day above ground is a Good day.
Lakeland, FL |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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well on the mallory unit the base plate inside of the unit is adjustable and limits the maximun possible advance, then it just comes down to selecting the right combination of springs to curve it. Where on the HEI usually you have to change the weights and springs and cannot limit the max advance so as the springs wear and loose some of there tenson the advance creeps up as well.
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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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. |
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Every day above ground is a Good day.
Lakeland, FL |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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no problem, he just needs to get a conversion kit or a new dist.
After a season on the points they need re-gapped (dwell set) and re-timed as well as they are now a little worn. 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 you can buy into all the marketing BS if you want but facts are facts, optical trigger, stock look, higher Kv output, easier to adjust. So what if it has one more wire big deal. 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. |
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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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.
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Every day above ground is a Good day.
Lakeland, FL |
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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79, you do have to admit that some of what you said is exactly a reason to use it. It really hasn't changed alot since the late sixties when it was introduced. It has always been a great performer on anything under 6000 rpms, simple to install, buy any parts at about any parts store.
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Every day above ground is a Good day.
Lakeland, FL |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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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 |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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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. And again you can run .055 or even .065 with the DUI, Stock HEI or Mallory like I had on mine. Your not getting anything fancy Tim just because they can copy/use an expired GM patent and parts, doesn't mean sh*t ran .065" gapped plugs in my '77 regal with a stock 350 and HEI dist. Hell tuned up a ton of cars at the shop the same .065" gapped plug and not a single one was a hot rod by a mile. Please quit trying to justify that the DUI is superior it's not, I can go to the fucjing junkyard and pick-up a cadilac HEI unit(or which which ever casting matches up with the ford) and get it to perform just as good as the DUI unit piece of cake extremely simple to do. |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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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. |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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efficiency = lean mixture = hotter engine temp = less fuel used = lower rpms performance = rich mixture = cooler engine temp = more gas used = high rpm = give me F'n fuel because I's got no time to be efficent and burn it all anyway so make it a double shot of High Octane please and I'll see ya later Like I said earlier the duration will not change due to the gap being increased. What you want is for the plug to fire a second time while on TDC and that is what the MSD and Mallory spark boxes do won't help abit on fuel milage maybe a 1-2% better maybe. |
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kelpomatic
Newbie Joined: February-21-2007 Location: United States Status: Offline Points: 31 |
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oops, just found this
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MAA%2D29440M&N=700+309367+115&autoview=sku |
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kelpomatic
Newbie Joined: February-21-2007 Location: United States Status: Offline Points: 31 |
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79,
since i am a pin shearing dips*&^, and you obviously know your stuff, can you help me? i just locally found and ordered the ylu distributor, do i need some kind of recurve kit, and if so what is involved in recurving? and what promaster coil i should go with? i was on the summit site and got overwhelmed with options. i do agree though, thruout this project, summit has shipped the quickest |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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Agreed. That isnt to say that a longer duration spark isnt better though, is it?
Hmmm, you'll have to convice me on that one. My logic says that a hotter/stronger and longer (duration) spark will better ignite a lean mixture and provide a more complete burn- which would improve both economy/efficiency and performance. |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Timmy Timmy Timmy you really bought that line of BS, the only way to increase the duration is to use a wide rotor segment, you are able to open up the gap because of the high Kv rating of the coil not because of the module. Besides the only reason to open up the gap is fuel milage not performance. |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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So the Mallory has a hotter spark- what about duration? Thats what PerformanceDistributors is citing for their .055" recommended plug gap. Whats the recommended gap on the Mallory? |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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three wire pos, neg to the coil and a ground to the block. The DUI site list the coil as 50Kv unit vs 55Kv for the Mallory promasters series coils.
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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So the YLU is like the Unilite series for autos? Understood now, makes much sense. My coil is 50 or 60,000 volts, I will check when I get home. What kind of coil do you run with that? I know I have seen alot of discussions on here about what coil, ballast resistor/no ballast resistor etc. It gets me confused. Also, is it a 3 wire hookup? Tach, 12V, and ???
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Every day above ground is a Good day.
Lakeland, FL |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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the YLU unit has a optical trigger, the YLM and HEI have magnetic triggers. What's faster, light or a magnetic field? which is more stable, which has a more consistant trigger pattern (firing of the spark plugs)
the mallory promasters series coil has a higher output than the DUI unit as well. and for all you that want to say well if there's water on the lens or moister in the cap then the optical system fails or doesn't fire, well that's just not the case, besides if you have that much moister in the cap then you have other issues all together. |
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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79, I'm curious why you say the mallory out performs the HEI. I know that you have designed ignition systems and know your way around the electronics, so I want to know your reasoning. I went with the HEI because I'm a GM nut and I know that dist. I did do some custom curving to get it where I want it, but it performs flawlessly. Please enrich and enlighten me.
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Every day above ground is a Good day.
Lakeland, FL |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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Actually did it last night Chris. Roll pin out with a punch and I did use a small gear puller to get the gear off. Only thing different is you need to drill out the roll pin hole in the gear as the hole in the Mallory dist shaft is larger. The Mallory tech told me I would have to do this. It did go back together pretty easy but I noticed the hex drive on the bottom of the shaft lines up differently than the stock so I had to mess with the oil pump shaft alignment to get it to drop back in. |
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You can’t change the wind but you can adjust your sails
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kelpomatic
Newbie Joined: February-21-2007 Location: United States Status: Offline Points: 31 |
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79, i might be a newbie, but i am not a dipsh&^
i have wrenched all my life in some way or another, usually motorcycles. my old distributor was in rough shape, and the gear was definately tight on the shaft. in the past and in this case, i find that using a nail with the head cut off works very well for roll pins if you dont have the correct diameter punch. i had to use a puller to get my gear off. one other concern, my old shaft has a spiriled groove around the shaft. it is directional, is that to keep the oil from traveling up the shaft? |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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did you remove the roll pin first or just shear it off because you didn't know any better? Allen take a small straight punch and drive out the roll/spring pin just enough to clear the shaft but not all of the way out, much easier to re-assemble if it's not completely driven out of the gear. But once the poll pin is driven back the gear will slide right off pretty easily as they are designed with a slip fit and not a press fit. Also there should be a small pimple somewhere on the gear this should line up with the tip of the rotor. Shouldn't be any issues doing it at the lake. |
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kelpomatic
Newbie Joined: February-21-2007 Location: United States Status: Offline Points: 31 |
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fyi, i pulled the gear off the old dist. today, it was pressed on pretty good, not something i would want to do at a campground,
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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That's the right one Tom but too rich for my blood. $255 for LH from Summit, good deal if the gear interchanges like it's supposed to. We'll see how that work's out. Skidim has the same one for about the same money with the CCFAN discount. |
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You can’t change the wind but you can adjust your sails
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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79, Mine came in from Summit last week, just haven't had a chance to put it in yet. It was ordered under the old numbering system, I'll still have to change the gear though. Hope thats an easy thing cause I intend to do it at the campground in Shelbyville friday morning. |
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You can’t change the wind but you can adjust your sails
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