Advance curve kit what now
- Thread starter skep419
- Start date
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TrailBeast
AKA Mopars4us on Youtube
I guess that's one way of making you buy a new distributor.
That sucks.
I'd be willing to bet someone else still has them, and if you post the distributor part number I may be able to help you find them.
That sucks.
I'd be willing to bet someone else still has them, and if you post the distributor part number I may be able to help you find them.
skep419
5.9 Magnum 4 speed afficionado
Accel 59301
Instead of keys, use the shanks of a drill bit. Does exactly the same thing. Looks a lot like a mallory curve kit.
The springs may be more difficult to obtain.
The springs may be more difficult to obtain.
skep419
5.9 Magnum 4 speed afficionado
Yeah I really just need the springs.
d1970
TODAY IS A GOOD DAY TO HAVE A GOOD DAY
I bought a limiter plate and springs from FBO Systems to use in my electronic distributor. I have my distributor locked at 14 degrees and 20 degrees initial, for 34 degrees total and I used the springs from the kit to adjust my all in at 2500 rpm. I also picked up their book "TUNING TO WIN"Carburetor and Ignition Tuning for Performance Engines
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mderoy340
Well-Known Member
The newer MP distributors have Mallory internals. Every .010" = 1* mechanical advance at the crank. Another example of MP not caring about the people that buy their products.
TrailBeast
AKA Mopars4us on Youtube
I could only find the set for the MSD distributor.
Checked Holley also because they do carry other than Holley, but no luck there either.
sorry.
Checked Holley also because they do carry other than Holley, but no luck there either.
sorry.
Mattax
Just the facts, ma'am
Exactly. That kit is for Mallory distributors with the YH advance mechanism. Same mechanism used in the newer MP vacuum advance distributors. The MP version of that spring kit had slightly greater selection. (Those springs are not the right length or rates for a Chrysler or Prestolite built distributor. )
http://documents.holley.com/mallory_instructions_yh_series_mechanical_advance_kit_29014.pdf
At first I liked the convenience of the adjustments, but then didn't like that the design results in an exponential increase in the advance. Maybe a more important design consideration to be aware of is that adjusting the advance also effects initial spring tension. More tension on the primary spring(s) will delay the start of advance and vica versa.
moparmat2000
Well-Known Member
I may he a novice, however whats wrong with using the mr gasket 925B advance spring kit on a mopar dizzy.
mderoy340
Well-Known Member
Nothing wrong at all. You just don't have the convenience of using the curve charts with different color springs.
abodyjoe
Well-Known Member
abodyjoe
Well-Known Member
nothing at all.. i've used them in the past.. i always used the stock light spring and one of the new springs which usually brought total in at about 2000-2200 rpm
skep419
5.9 Magnum 4 speed afficionado
$11.00 shipped for just the spring kit from FBO systems. Score!
mderoy340
Well-Known Member
This kit is for the old style OEM and aftermarket distributors FBO sells with the larger weights.
d1970
TODAY IS A GOOD DAY TO HAVE A GOOD DAY
good choice.
skep419
5.9 Magnum 4 speed afficionado
mderoy340
Well-Known Member
Take the cap off and look inside. If the weights are around 3/8" thick the FBO kit will work. If they are around an 1/8" thick the kit won't work.
skep419
5.9 Magnum 4 speed afficionado
Looks like I'll be adding to the never going to use/even if I could I wouldn't be able to find it until after I bought it again pile.
Mattax
Just the facts, ma'am
Need more information to know if they are OK to use:
1. Type of Mopar distributor.
2. The length and spring rates of the springs.
The MP version with Mallory guts uses lower spring rates than a distributor with Chrysler internals.
The operating length of the spring can be compensated in the distributor just a little bit in both types of advance mechanisms. This adjustment is to set the starting point (rpm) the timing will begin to advance or to slow. A spring that is way too short will have to be reshaped. Otherwise the spring will be stretched too much and spring rate will be non-linear. It will also lose its elasticity in many fewer cycles than a normal spring (usually designed for 1 millon plus cycles).
A spring that is too long also can be reshaped. A spring that is too long will not slow the advance.
Not many merchants have the spring lengths and rate. So that's when you have to buy 'em and measure 'em.
Skep419: All we can see in the photo is the magnetic pickup. What's wrong with the distributor? Any mechanism can be adjusted. My guess is Accel uses a GM style more like the MSD than the Mallory.
skep419
5.9 Magnum 4 speed afficionado
Skep419: All we can see in the photo is the magnetic pickup. What's wrong with the distributor? Any mechanism can be adjusted. My guess is Accel uses a GM style more like the MSD than the Mallory.
The mechanical advance weights are 1/8"
The mechanical advance weights are 1/8"
Mattax
Just the facts, ma'am
OK. You should try it. Thin weights are used in a number of different advance mechanisms. It might be very similar to a factory GM or an MSD, both of which are easy to buy springs for.
As far as limiting the advance, there's ways to do that as well. For example MSD uses bushings. MSD and GM wieghts can also be reshaped. Mallory weights can be shaped too but I don't know of anyone who has experimented with this (besides me and I don't have enough info from that to guide anyone)
Mattax
Just the facts, ma'am
Some pictures of Springs and Weights on the last two pages of
http://racingfuelsystems.myfunforum.org/viewtopic.php?f=21&t=666&start=20
Chrysler advance springs are approximately 0.7" long (Primary) , 1.0" Secondary; plus or minus a 0.1 depending on specifics including slot lengths and position. Remember the spring perches are adjustable.
http://racingfuelsystems.myfunforum.org/viewtopic.php?f=21&t=666&start=20
Chrysler advance springs are approximately 0.7" long (Primary) , 1.0" Secondary; plus or minus a 0.1 depending on specifics including slot lengths and position. Remember the spring perches are adjustable.
That looks like a mallory internals distributor.
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