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Discussion Starter · #1 ·
I have a Mallory "locked out HEI dizzy" Im trying to get this thing dialed in so i went to Mallory's FAQ's and this is what is posted about my dizzzy.

These are questions and answers. somebody want to splain this to me are they saying i can only get 20-24 degrees of advance with this dizzy?

Mallory Knowledgebase Question:

I would like to know what is the total advance (degrees) that is installed in your Mallory HEI Distributor #8548201C. And can it be adjusted more or less ? Thanks, Greg

Solution:

20 to 24 degrees. The amount of mechanical advance is not adjustable.


And.


Mallory Knowledgebase Question:

I've recently purchased a Mallory distributor, part # 8548201. Are you able to tell me the total mechanical advance built into the distrbutor? Is this amount changed ( ie. reduced ) easily? Thanks, Kevin Clemence.

Solution:

10 to 12 distributor degrees (20 to 24 crank). Amount of advance is not adjustable.
 

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I have a Mallory "locked out HEI dizzy" Im trying to get this thing dialed in so i went to Mallory's FAQ's and this is what is posted about my dizzzy.

These are questions and answers. somebody want to splain this to me are they saying i can only get 20-24 degrees of advance with this dizzy?

Mallory Knowledgebase Question:

I would like to know what is the total advance (degrees) that is installed in your Mallory HEI Distributor #8548201C. And can it be adjusted more or less ? Thanks, Greg

Solution: Edit; or are you sayin you want to unlock it???? I'm kinda slow some times....O.k. always.

20 to 24 degrees. The amount of mechanical advance is not adjustable.


And.


Mallory Knowledgebase Question:

I've recently purchased a Mallory distributor, part # 8548201. Are you able to tell me the total mechanical advance built into the distrbutor? Is this amount changed ( ie. reduced ) easily? Thanks, Kevin Clemence.

Solution:

10 to 12 distributor degrees (20 to 24 crank). Amount of advance is not adjustable.
Sav...if your locked out that means all the advance is locked=none. I'm locked at 43*:D Starts at 43* 2k r's 43* w.o.t. 43*....
 

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Or are you sayin you want to unlock it...I'm kinda slow sometimes sorry......for some reason I couldn't edit my other post???
 

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Discussion Starter · #5 ·
Or are you sayin you want to unlock it...I'm kinda slow sometimes sorry......for some reason I couldn't edit my other post???

No i dont want to unlock it , but if it has a built in advance of 10-12* then if i wanted to get 36* total timing would i set it at 24* to get the 36* or do i just ignore what is already built in?
 

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If the distributor is "locked out" you have exactly ZERO degrees of advance in the distributor. That is the definition of locked out. Set the timing at idle at the amount you want, i.e. 36*. That will be your timing at all rpms.
 

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I dont know if im getting your question right here but here goes, It doesnt matter what the dizzy has in it for advance because you will be locking it out meaning you will be screwing down the advance plate in the dizzy so it wont move then you stab the dizzy in the motor and set it at about 34* or whereever you want it to run at and thats called locking out the timing.it wont move from that mark it will idle and wot at the same timing that you set it at. it may be hard to start and you may want to put a kill switch on the thing so you can spin it over with the key and get it rotating then flip the ignition on to get it to fire. that will save you from breaking starters.
 

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What GN is saying7

Dont worry about the initial timing, set the timing with the engine running and rev it up while watching the timing light. when the timing stops advancing (normally around 3500 rpm) set the timing at the full advance you want (say 36). when it idles back down check it again and the diff will be the amount of mechanical advance.
 

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Discussion Starter · #9 ·
Thanks everyone.

I was just wanting to check, last time i took her out she ran like shit below 3K and great above 3K that was at 38*

Since then i have checked a few things and set the timing at 34* ( starts easier)

Also found out i was running 10 psi on fuel, valves were not adjusted correctly, checked the floats and when i pulled the sight plugs fuel ran out like it was a garden hose...

So now i have the timing set at 34*
Floats are adjusted.
4 corner idle is adjusted ( on the rich side ) for now.
Valves are adjusted.
fuel reg is dropped to 7 psi.

On vacation next week and hoping to get her wet for some more testing..

I think she is getting close:)devil
 

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who told you it was locked out? clearly from mallory they are indicating it is not "locked out" it has built in mechanical advance. someone would have had to take the dist. apart to "lock out" the mechanical advance that mallory built into it.

so if you got this new then it is not "locked out" it has built in mechanical advance. if you bought it used and someone else "locked it out" i would definitely check it before setting the timing to 32,34,36 (whatever you want it to be) thinking it has been locked out because if you set it at idle and it is not locked out, then you could have a bad situation on your hands.

easiest thing to do is toss a timing light on there. set it to 8-10 degrees at idle then give it some throttle and watch the timing mark. if it doesn't move at all with any kind of rpm then its locked out and you will need to set the timing to full advance and it will stay there all the time. if it does move then rev it up to 3500 or so (all advance should be in by then no problem) then set for full advance and your done

AP
 

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are you setting the timing at idle or revved up?
if it is "locked out" your timing will not change no matter what the rpm.
 

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the one you bought is the "Race" model. indicated by the R at the end of the part number. it is designed with no mechanical advance from Mallory. the other ones referred to by the people asking the questions in your first post are asking about the street version which has advance built it. those questions do not apply to your distributor. just set the timing like you are. any rpm will yield the advance it will always be at.

AP

this is the one that is the street version, the one the questions apply to http://www.summitracing.com/parts/MAA-8548201C/
 

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Discussion Starter · #14 ·
the one you bought is the "Race" model. indicated by the R at the end of the part number. it is designed with no mechanical advance from Mallory. the other ones referred to by the people asking the questions in your first post are asking about the street version which has advance built it. those questions do not apply to your distributor. just set the timing like you are. any rpm will yield the advance it will always be at.

AP

this is the one that is the street version, the one the questions apply to http://www.summitracing.com/parts/MAA-8548201C/

Well hell, there it is... Im gonna stop looking at shit and just run the bitch:)devil

Thanks:D
 

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Whats the advantage of running locked out timing? I found out mine is locked out, 27* at idle and 27* at 3K

Who locks them out the factory?

could this be why i have to warm my motor up before it will idle on its own? I'm thinking of going with a regular dizzy.
 

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Whats the advantage of running locked out timing? I found out mine is locked out, 27* at idle and 27* at 3K

Who locks them out the factory?

could this be why i have to warm my motor up before it will idle on its own? I'm thinking of going with a regular dizzy.
Mine idles alot better locked than not. I think the theory or thought behind locking them in a jet ,is that the boat is going to spend the majority of it's time above 2500 r's so why worry about the curve under 2500 r's.
 

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No i dont want to unlock it , but if it has a built in advance of 10-12* then if i wanted to get 36* total timing would i set it at 24* to get the 36* or do i just ignore what is already built in?
OK, I think I know where you are getting screwed up. The dizzy has 10-12* built into it. that means that the dizzy will advance your timing a total of20-24 CRANK DEGREES over your initial timing setting of say 12* The dizzy degrees are 1/2 crank degrees. One degree of dizzy advance equals two crankshaft degrees. Make sense now. Where did all you guys keep coming up with this locked out dizzy stuff. He never said he wanted it locked or unlocked. I think you confusing locked with fixed. Which is different and means you can't adjust the amount the dizzy advances



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OK, I think I know where you are getting screwed up. The dizzy has 10-12* built into it. that means that the dizzy will advance your timing a total of20-24 CRANK DEGREES over your initial timing setting of say 12* The dizzy degrees are 1/2 crank degrees. One degree of dizzy advance equals two crankshaft degrees. Make sense now. Where did all you guys keep coming up with this locked out dizzy stuff. He never said he wanted it locked or unlocked. I think you confusing locked with fixed. Which is different and means you can't adjust the amount the dizzy advances
look at posts 12-14

AP
 
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