Old mallory double life points dist.

[Little Mouse]

Im wondering if the 4 lobe each set of points only firing four cylinders if it would be a bit better at higher rpms to not have points bounce problems in comparisn to the 8 lobe dual point they made ?

[BigBlockMopar]

Can't you run 2 coils with these distributors and maintain a good dwell-time at higher rpm?

[Circlotron]

I've never played with one but I'm doubtful if there is any difference because point bounce is brought on not by the frequency of opening and closing but by how quickly the points contacts approach each other when closing. That is a function of the points cam profile. The rate of approach may be similar for both kinds of distributors. Assuming they bounce the same amount as a regular single point 8 cyl distributor, at least there is more time for them to settle down after closing, so they may be better in practice.

[Little Mouse]

When i was very young i had a new 69, 302, Z/28 i ran it way past its real pulling power, always got my jollies making it do 60 mph in low gear with its 2.20 low , 3.73 rear and the factory E70 bias ply goodyears that measured 27 in dia. That tach would read 8000 grand and it could do that in the first three gears. In fourth 6500 was it the wind pressure on the brick of a 69 camaro would not allow anymore. I did not have any problem with point bounce. Come to find out later in life the points used in it had a higher spring pressure. So not knowing any better at the time i just bought regular points at an auto store then had obvious misfire from points bounce. So i cut a spring from a second set of points put it in behind the other one and it fixed the problem did not seem to wear the pints block down at a high rate. I also did not know back then that besides delco part # points you could get with a stiffer spring accell was making one even stiffer. So had i known that i could have just bought say the accel points would have fixed it. So i did learn the spring stiffness a big player in making it work. Around 1975 i had a 66 vette conv. With a bbc. Mallory had what they now called a yl dual point with a female style cap that used they 4 lobe type dual point and a cable tach drive, i put one in it. But it was a 7000 rpm tops engine i had no problem with points bounce out of it.

[Little Mouse]

Before the yl mallory i did use with the female style cap. Mallory made the double life 4 lobe with a two peice cap that looked a lot like a mag cap. Looked cool as hell. Today you can still get parts for them but not the cap.

[Little Mouse]

Can't you run 2 coils with these distributors and maintain a good dwell-time at higher rpm?

Have seen that questioned asked before the answer i saw said you have to have a special cap to do that and no one makes one. I thought ya if you could get each set of points using its own coil would if nothing else be a lot easyer on the coils. Old honda motorcycle twins were like that each cylinder had its own points and coil operating seperate to each other and they had no problem with 10, 000 rpm and way higher then that on all out race engines of that time period. Points are a bit under estimated as to what they can really do, its really the coil more then the points that need forms of upgrade.

[Geoff2]

Two sets of points = two places where points can wear, erode & bounce.

[Circlotron]

Holden used a dual coil distributor in some faster versions of their 308 motor in the mid 70s.

https://www.google.com.au/search?biw=16 ... CAY&uact=5

[tenxal]

Im wondering if the 4 lobe each set of points only firing four cylinders if it would be a bit better at higher rpms to not have points bounce problems in comparisn to the 8 lobe dual point they made ?

No.

[Kevin Johnson]

Two sets of points = two places where points can wear, erode & bounce.

With the Benelli Sei (straight six) the dual sets of points were an endless problem. A company in the UK created an electronic trigger plate.

[Little Mouse]

Before the magnectic trigger stuff showed up everyone was running high rpm with points thats all there was.

[Little Mouse]

Two sets of points = two places where points can wear, erode & bounce.

With the Benelli Sei (straight six) the dual sets of points were an endless problem. A company in the UK created an electronic trigger plate.

Ya but it was made in italy. Want an expensive problem today buy a ducati.