200ci Carb question

[choppermike]

Long story short I hope. 65 Mustang w/66 200CI. I have a Unilite dist. with no vac advance. Bought the car this way. I had problems with my carb and had one from another engine which was good, but I put it on my engine and could not get it to run for nothing.

Question- I have heard story's of SCV or Spark Control Valve. Not sure what this is or if that is what I need for this dist. I am confused as to what I got and what I need. Does the non vac advance use a special carb? Does it make a difference? I want to get another carb and just trying to figure out what year or type I need.

The carb that I have is a Motorcraft or I guess Autolite 1100. Any info that anyone could share would be appreciated.
Thanks, Mike

 

[fordconvert]

The Mallory Unilites could be configured several ways depending on what the rest of the system is. I think you could get them with standard mechanical / vacuum advance or with out the vacuum (for things like boats, tractors, and stationary power) or with no advance for systems where there was some form of electronic timing.

The scv was a system where there only was vacuum control of the timing (no weights) to do this they needed a special vacuum control system that was in the carbs. Any aftermarket system is not going to use the scv method. Ford even quit using it in 67?. Most of us are running the vacuum advance connected to manifold vac.

 

[fordconvert]

I forgot to add, if you dont have some hi tech electronic control box you will likely get better drivability and performance getting one or getting the parts to convert it to standard mechanical and vacuum advance. Poke around Mallorys site, they should have a parts list somewhere and once you have numbers you should be able to buy the parts from summit jegs like places

 

[choppermike]

Thanks for the info. The car runs fine but has no advance on the dist at all which is confusing. I found an 80's cougar with a 200 I am going to get the DSII off of and maybe get rid of the unilite. Parts for the Unilite are quite pricey. Like I said everything is ok but I think the DSII may give me better performance.

 

[CZLN6]

Howdy Back Mike:

I think that the Mallory Unilite is a non-point type electronic distributor, and self contained. IF it does not have a canister for vacuum advance, you may need more than the Stock specs of initial advance, (Standard trans - 6 BTC, or Auto trans 12 BTC). You will also need to seal the vacuum port on the carb. If you don't you will have an intermitant vacuum leak depending on the position of the carbs SCV.

There is a good sticky at the top of this forum on the function of the SCV.

So long as the Autolite 1100 is operating correctly and the vacuum ports are thoroughly sealed, it should be compatible with the Mallory Unilite distributor. If I recall correctly, the Unilite has an adjustible centrifugal advance.

It sounds more like a carb issue then a distributor problem. Did the problem exist before adding the Unilite?

Keep us posted.

Adios, David