Mappable ignition unit
05-30-2014, 07:33 PM
#1
Melting Slicks
Thread Starter
Mappable ignition unit
http://www.aldonamethyst.co.uk/
I'm quite interested in putting one of these in my car for the SB engine. I like the fact you can retain the original look and this unit would be quite easy to hide behind the RH dash panel. Thoughts opinions??
I'm quite interested in putting one of these in my car for the SB engine. I like the fact you can retain the original look and this unit would be quite easy to hide behind the RH dash panel. Thoughts opinions??
05-31-2014, 01:02 AM
#2
Team Owner
Interesting. I think that just running a real digital dizzy like the Crane Cams unit which with just a turn of the dial you can set your parameters.
The Crane was not out yet and I bought the MSD digital dizzy. MSD had some non car people on the design team. The unit has 100 choices. Well 90 of them nobody would use and the other 10 have 5 degree jumps. Like 25 30 35 40 45 50 55 60 They should have been 2 degree jumps. So the MSD is a poor product. The Crane is a good product with great matching coils and mutli spark units
The Crane was not out yet and I bought the MSD digital dizzy. MSD had some non car people on the design team. The unit has 100 choices. Well 90 of them nobody would use and the other 10 have 5 degree jumps. Like 25 30 35 40 45 50 55 60 They should have been 2 degree jumps. So the MSD is a poor product. The Crane is a good product with great matching coils and mutli spark units
05-31-2014, 01:29 AM
#3
Melting Slicks
Thread Starter
Hi gkull, the Crane dizzy looks good but then I would have to convert my tach to electronic which I don't want to do. I see all of the other Crane options seem to still use the std centrifugal and vac advance which I don't want. Are there any other options other than the MSD dizzies?
05-31-2014, 02:24 AM
#4
Team Owner
Hi gkull, the Crane dizzy looks good but then I would have to convert my tach to electronic which I don't want to do. I see all of the other Crane options seem to still use the std centrifugal and vac advance which I don't want. Are there any other options other than the MSD dizzies?
The best thing to do is limit the mechanical advance so for a motor that needs about 38 degrees. limit mech advance to about 20. your initial is them 18 degrees.
hook the vac advance to a ported port.
have your all advance in around 3000 rpm in a performance motor
05-31-2014, 07:09 AM
#5
Melting Slicks
Thread Starter
According to the dial back timing light I have 45 deg of advance with the vac disconnected. I'm thinking that the harmonic balancer has slipped because I should have detonation at that advance surely.
Vac advance is connected to manifold per Lars papers and is all in by 3000 rpm.
My reasoning is that if I fit the Amethyst unit it will enable me to tune the advance curve more accurately. The spring kits offered here are cr*p and using them I was getting over advancing at low revs and the engine did not like it at all. I have compromised and fitted a pair of std springs at present and have left it at that for the moment.
Vac advance is connected to manifold per Lars papers and is all in by 3000 rpm.
My reasoning is that if I fit the Amethyst unit it will enable me to tune the advance curve more accurately. The spring kits offered here are cr*p and using them I was getting over advancing at low revs and the engine did not like it at all. I have compromised and fitted a pair of std springs at present and have left it at that for the moment.
05-31-2014, 08:13 AM
#6
Racer
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05-31-2014, 06:20 PM
#7
Melting Slicks
Thread Starter