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This topic was originally posted in this forum: Modified Tech Talk
Author Topic:   HEI distributor question.
Rook 78
Member
posted April 12, 2004 09:12 AM     Click Here to See the Profile for Rook 78     
I have an HEI distributor, and found while timing it is fluctuating at about 3000rpms. I took the cap off and found that there were no bushings on the weights. I tried to put the bushings in, and they fit inside the weights, but did not fit on the shafts, apparently my shafts are oversized. I have no idea who built this distributor as it came with my motor. I changed the springs which seemed to help, but there is still slop where the weights go onto the shafts. What is up?? Is it possible that I have a racing distributor and someone has put stock weights on it?

[This message has been edited by Rook 78 (edited April 12, 2004).]

NJantz
Member
posted April 12, 2004 09:35 AM     Click Here to See the Profile for NJantz     
I have this same problem. We've tried a different timing light and still the same problem.
I've also tried a DUI HEI and one I built myself and still have fluctuation.



dirtbuster
Member
posted April 12, 2004 10:17 AM     Click Here to See the Profile for dirtbuster   Click Here to Email dirtbuster     
If it were me I would take the weights out and lock it up so there was no working advance. Then you dont have to worry about whether the weights fit or not.


Rook 78
Member
posted April 12, 2004 11:12 AM     Click Here to See the Profile for Rook 78     
Not sure rules will allow that, but I will check. Thanks.


Rook 78
Member
posted April 14, 2004 09:12 AM     Click Here to See the Profile for Rook 78     
Being told that I can weld up dist. Can someone explain to me the best way to do this? Thanks.


vince88
Member
posted April 15, 2004 07:59 AM     Click Here to See the Profile for vince88   Click Here to Email vince88     
how good is your timeing chain. if it has slack in it. it will cause your timeing to jump around alittle also..just a thought


Rook 78
Member
posted April 15, 2004 08:37 AM     Click Here to See the Profile for Rook 78     
Had not thought of that, thanks. I first want to get the distributor taken care of, if that does not resolve the problem, I will check the chain. Thanks.


jws
Member
posted April 15, 2004 11:06 AM     Click Here to See the Profile for jws     
If you weld it up, you had better have a good starter and a strong battery. This makes it hard to crank, especially on a high compression motor. You're timing may fluctuate at 3000 because that is about the rpm when you are achieving full advance. Maybe it is just not quite fully advanced and it is still moving around. You will never see 3000 rpm on the race track except restart. As long as it is steady by about 4000 I wouldn't be worried about it.


vosevichs
Member
posted April 15, 2004 11:07 AM     Click Here to See the Profile for vosevichs   Click Here to Email vosevichs     
HEI dist. have bushngs in them. They wear out fast. Remove the rotor and wiggle the shaft around. If they are gone. You think your timeing is bouncing at idle. Rev it up and watch it bounce. I'd trash it and put in a MSD. Or a DUI dist. if you like the HEI style.

------------------
Scott Vosevich
RDBoyz Racing

[This message has been edited by vosevichs (edited April 15, 2004).]

Rook 78
Member
posted April 15, 2004 12:29 PM     Click Here to See the Profile for Rook 78     
Class requires an HEI, and I finally found out it is a DUI. The bushings seem to be good in the distributor, I am working on ordering new weights and springs. I was told by Performance Dist. that I do not have the right weights. I am going to start there, and see what happens. The weghts are so loose on the shafts that they can overlap. The car runs good, I have had it to 6700 and does not seem to cut out, but eventually I will need to take it over 7000. Just want to make sure everything is good. Thanks.


dirtbuster
Member
posted April 15, 2004 12:56 PM     Click Here to See the Profile for dirtbuster   Click Here to Email dirtbuster     
We run no advance in our distributor and dont have any trouble firing 13:1 motor. Wire your ignition so you can turn it over then hit the fire button. That way you can get it spinning before trying to put the spark to it. If you do run advance I would keep a close eye on it and check it often so it doenst cause you problems.


MiPinto6
Member
posted April 15, 2004 03:04 PM     Click Here to See the Profile for MiPinto6   Click Here to Email MiPinto6     
We have locked the advance in every distributer we've ever run. Just as the post above suggested, get the motor spinning and then light it. Never had any problems. We just remove all the advance wieghts and tack weld a few spots to hold the advance in place.

Rob

jMartin32
Member
posted April 16, 2004 10:00 PM     Click Here to See the Profile for jMartin32   Click Here to Email jMartin32     
just weld it .


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