all you d.u.i users

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Joined
Feb 9, 2002
Threads
247
Messages
1,207
Location
Utah
anyone know if the gear on the distributor is available at a parts store?
or will i have to order it special?
if i find one that matches my cam gear and fits my dizzy shaft, is that all
it requires?
 
Did you try to get one from Performance Distributors? That is who you got your D.U.I. from isn't it ?
I would think they would be willing to work something out with you.
With the HEI conversion which is the same as D.U.I. except the DUI is dialed in better and your paying for their expertise; everyone just swaps the Factory toyota gear from the old distributor to the new one.

good luck
David
 
everyone just swaps the Factory toyota gear from the old distributor to the new one.
that would be nice. i called them, and they say it's $30.00, i was just wondering if i could find one at a parts store. i've shown this gear from the dizzy to some mechs, and they all agree that this gear that d.u.i. put is the wrong one. (i've got some pics, but i can't figure out how to upload them)
it seems that the gear wore down (quickly) and then finally jumped and detonated.

anyway, if you think a regular cruiser dist gear would work, i'll try to find one.
 
I just used the gear from my old diz. You can buy a used diz pretty cheep, why not just do that and use the Toyo gear? I used a roll pin in mine, like the HEI, but some have used a solid pin like the toyo. IIRC, the pin size in the GM diz was smaller than the Toyo shaft...anyway I redrilled either the gear or the shaft and used a rollpin. I have 10K on mine with no problems...so far.
GL
Ed
 
the problem is about spending $30 and getting the right gear... is that it might NOT be the right gear. it seem like the one on there isn't the right one.

is the some possibility that the gear on my cam is not the right gear? the engine was rebuilt about 5 years ago, and i know that it is a toyota cam, so it seem accurate that it would be a cruiser cam, with a cruiser gear. by the way, is the gear machined onto the cam, or are they removable (just incase mine is destroyed)?
 
The gear is a part of the cam and can not be replaced. AFAIK there is no aftm cam that is not TLC specific that will work in a cruiser.

Like I said, playing with fire. You got burned once and now are looking to get burned again. How 'bout a nice OEM dist that works and works well for a long time.
 
You can't. Nor can you get the parts availability, aftermarket support or timing adjustment weights. You also get the Toyota ignitor, a nortoriously expensive and hard to find part, compared to a GM HEI module that you can find at WalMart in an emergency for about $30.

If the DUI Toyota gear has the hole drilled in the right place and is the right gear, just order it from them. If you really want to do it yourself, i have a points dizzy somewhere, I think.

I know I have a 85 set up with the coil and ignitor, but i can't see letting it go for less than a couple of bills.
 
I gotta agree with Todd on this. The DUI/HEI gives a much better spark and is more adjustable. The ignightor does not go out very often. If it does you can bypass it. I have never seen one go out. Usually, when it is diagnosed as bad, there is a different ignition issue that mimics the ignightor.

A MSD or Jacobs will get you very close to DUI quality spark.

The adjustments are cool but I dont see a F series motor getting much benifit from them to justify the risk.
 
10k miles? i've had mine for two years and probably only 2k on it. i wouldn't worry. i showed another mech today, and he seems to thing that the dist wasnt' fully seated, or that my cam was sitting forward or back.

anyone have a stock dizzy gear they want to sell me cheap? i'm in utah.
 
sanjuancruiser said:
you guys got me scared-I got my dist from DUI do i need to worry about the gear? its been good for 10k miles so far.


I would immediately get this fixed. This can cause problems. I could damage your gears inside your engine then your looking at a rebuild instead of a dizzy swap.

This Metric to SAE is a common problem and has been written up here several times. It's just not worth it. I have a DUI HEI that I bought from performance distributors that was tuned and geared to fit the 2F engine specifically. Had this dizzy not been available, I would have not gone DUI because of the potential for serious damage.

Ken
 
aren't all of the d.u.i's from performance distributors (offered for cruisers) machined for the F and 2F specifically?
 
Yes. Performance Distributors sells DUIs for lots of different vehicles. The one the sell specifically (Unique part number) for the Toyota Land Cruiser is tuned and geared for a 2F.

Some folks buy theirs from a Junk yard for less than $50 out of a GM wreck and put it into the 2F. That was who my comment was aimed at.
 
I tried a D.U.I distributor - won't bore you with details but had all sorts of problems. Had a great mechanic - previous FJ 40 owner - he said gear was not the same as Toyota. Called D.U.I and they said they did not get gear from Toyota. Had one gear failure very quickly and they sent me a second gear... it had wear very quickly as well. Sent the entire DUI distributor as well as my orginal Toyuota to D.U.I for inspection. The installation was done by a professional mechanic. BTW Toyota does sell the gear for $33 - I think, because I checked for pricing and availability.

They eventualy gave me my money back with no good answer. I wanted them to resolve the problem and use the distributor- they didn't seem real interested or concerned. This was one very expensive project if I include all the $$ i spent on the mechanic & towing charges.

I have never actively "Bad Mouthed" the folks at D.U.I - I know a lot of folks have had success with their distributor - but I didn't. Hope this helps.
 
I set my truck up with an HEI diz last year and have put on about 8k miles trouble free. I have been very happy with it, but carry spare cap, rotor, and module anyways. I have some opinions on this so feel free to disagree.

As to the gear issue. I used my Toyota gear but would not hesitate to keep the gm gear on if it was redrilled/repositioned as was done with the Toy gear. Take the two gaers and measure them! There is no such thing as metric vs sae when it comes to these gears. They are the same tooth count, pitch, angle of cut, and within a half a millimeter the same height. There is a slight difference in diameter because of the gm gear having a slight angled lead in ramp on the teeth ridge. It just means the tooth seats slightly deeper but as long as it doesn't bottom out there should not be any issue.

The reason most gears fail is because of the axial load not being supported by the bearing surface of the engine block. Look at the bottom edge of the stock gear and you will see it is polished from spinning against the block - as it should be. Without supporting the gear, the distributer shaft is pulled downward causing the star wheel to chew into the dist. housing, or in some peoples case, the gears missalign causing all kinds of wear.

I would think DUI has resolved these problems since they make their own custom parts, and maybe your drive gear was a dud that had improper hardening or something? But if I were you I'd inspect that cam gear since odds are it has some corresponding wear to what that drive gear has.

Good luck
 
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