locked total advance
Moderator: John_Heard
- sixty_foot
- Posts: 75
- Joined: Tue Jul 26, 2005 3:16 pm
locked total advance
anyone got any tuning experience on locking out the total advance on my msd ??
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
I'm pretty sure most MSD distributors can be locked out easily. I think on most of them all you have to do is knock out the drive pin in the gear, take it apart and open it up some and rotate the main shaft plate to the advance plate 180 degress locking out the advance. Then just reassemble.
There's probably some instructions on the MSD site in a PDF file somewhere for your model distributor.
There's probably some instructions on the MSD site in a PDF file somewhere for your model distributor.
- sixty_foot
- Posts: 75
- Joined: Tue Jul 26, 2005 3:16 pm
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
Not really any performance gain because with your centrifugal advance all the timing should be in anyway by the time you're at a launch RPM, the main benefits are:
- Easier to set timing at a lower RPM
- Less variations in timing, locked is locked
Drawbacks
- Harder starting unless you have something that retards the spark during startup like a MSD box with that option
- Not as pump gas friendly with low octane gas
- Easier to set timing at a lower RPM
- Less variations in timing, locked is locked
Drawbacks
- Harder starting unless you have something that retards the spark during startup like a MSD box with that option
- Not as pump gas friendly with low octane gas
Exactly, well said. Put a light on it and find out where full timing is coming in, I re-curved mine to be at full timing at 2,500. Re-curving an msd is very easy and to buy the bushings/springs is just a few dollars. Good Luck!Beyond wrote:Not really any performance gain because with your centrifugal advance all the timing should be in anyway by the time you're at a launch RPM, the main benefits are:
- Easier to set timing at a lower RPM
- Less variations in timing, locked is locked
Drawbacks
- Harder starting unless you have something that retards the spark during startup like a MSD box with that option
- Not as pump gas friendly with low octane gas
cut and paste quote:
Exactly, well said. Put a light on it and find out where full timing is coming in, I re-curved mine to be at full timing at 2,500. Re-curving an msd is very easy and to buy the bushings/springs is just a few dollars. Good Luck!
?? So your preferance is to not lock the distr. Just recurve to your cars liking. I am assumming you do not have the compter corect?
Do you use a high rpm retard at all?
i know this post was old but its helping me. thanks
Exactly, well said. Put a light on it and find out where full timing is coming in, I re-curved mine to be at full timing at 2,500. Re-curving an msd is very easy and to buy the bushings/springs is just a few dollars. Good Luck!
?? So your preferance is to not lock the distr. Just recurve to your cars liking. I am assumming you do not have the compter corect?
Do you use a high rpm retard at all?
i know this post was old but its helping me. thanks
- John_Heard
- Site Admin
- Posts: 5734
- Joined: Thu May 12, 2005 11:20 am
- Location: Resume Speed, Kansas
- Contact:
If it's a nitrous car and you're getting serious with how much your spraying it I'd highly recommend both locking the distributor and a crank trigger. Trying to guess where the timing is at with those weights flopping around and the timing mark moving all over the place is no good. Go watch someone with a crank trigger and locked dist set their timing at the races, you'll be amazed how much steadier it is - and you'll be able to set it accurately.
My 1971 X275 Nova | Facebook
Who is online
Users browsing this forum: No registered users and 17 guests