metro turbo advance curve
Turbo Mini Forums

the metro turbo seem to had two different advance curves, one for the mk1 with the blue cover (clipsed) and one with black cover (screwed),
who could explain the difference between them?
fab

Edit: Moved

Edited by AlexB on 7th Mar, 2004.

Not sure but the Mk1 is supposed to be the better of the two.

I have an email from someone a LONG time ago that wanted to know the differnce, so gained access to a distributor test rig. Both the units he tested were exactly the same....

I've also heard it many times that the mk1 unit is superior and prior to this testing also had this view (because i never knew any different)...

I'll see if i can find the mail - but i don't have a clue who it was from mind!!!

Ive got an Aldon modified Mk1 unit to try but i think i may be going for mappable ignition, if im going to do a job im doing it properly :)

Only thing with the Mk1 is that the amplifier is seperate so you have to find somwhere to mount that.

, ian
I'm also like the welldone job,
but the mappable emerald ignition, or perahps an other will wait a little that I have enough money to buy a set of pistons
to start this new engine, I already have a mk1 and an mk2 distributor , so I want to know which is the best one.
cheers
fab

Hi Dave, that comparison was done by me about 2 years ago. I wiil have a look on my firm computer if I can find the file. But I think you are right, there was no difference in the advance curve!
Harry

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

Ha, having it even on this computer!

Harry

Dizzy with ignition module on. Numbers on ign. module: 84896 -->3988
Numbers on Dizzy: AUU 1533 2003 --> 42661A /189
Mark on Dizzy weights: 10 and on vacuum canister 12; measured + 12? at full vac..

Dizzy RPM Dizzy ? Engine RPM Engine ?

500 0 1000 0
750 1 1500 2
1000 3 2000 6
1500 7 3000 14
2000 8 4000 16
2500 9 5000 18
3000 9 6000 18

Dizzy with separate ignition module: Numbers 41932A -->3382
Mark on Dizzy weights: 11 1/4 and on vac. canister 17 12 54403635; measured + 11? at full vac..


Dizzy RPM Dizzy ? Engine RPM Engine ?

500 0 1000 0
750 2 1500 4
1000 4 2000 8
1500 7 3000 14
2000 8 4000 16
2500 9 5000 18
3000 9 6000 18




Next I adjusted the dizzy to give 3,5dizzy? at 750 dizzyRPM an measured the timing:

Dizzy with ignition module on
Dizzy RPM Dizzy ? Engine RPM Engine ?

750 3,5 1500 7
1000 5 2000 10
1500 9 3000 18
2000 10 4000 20
2500 11 5000 22
3000 11 6000 22


Dizzy with separate ign. Module
Dizzy RPM Dizzy ? Engine RPM Engine ?

750 3,5 1500 7
1000 5 2000 10
1500 8,5 3000 17
2000 9,5 4000 19
2500 10,5 5000 21
3000 10,5 6000 21

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

thanks Harry , exactly the information needed;
usefull

Im into modifying advance curves at the moment, so what does anyone think the curve 'should' be like? Dizzys are well renowned to have the wrong curve so as not to be anywhere near preignition. this, of course looses power.!

Sooperdooperturbocooperexpertengineering!