DSII Conversion Question

So, I've got a mostly stock 200 I6 in my 1966 Mustang. It has the autolite 1100 and I've got a pertronix in the stock distributor. I've been getting really crappy gas mileage (~12-15mpg) and lack of power/stumbling on acceleration that I can't figure out. I was hoping a DSII might help with that. Do you guys think it might?

My main questions:

Can I install a DSII while still using the autolite 1100? I know I couldn't use the SCV for vacuum, but is there another way to hook it up?

And 2nd, I really would rather not change out my accelerator pedal and everything to install a throttle cable. Is there any option for a non SCV carb (would like something to increase performance) that I can install and still use the current linkage? I don't mind making a bracket or something for it if I have to.

Howdy Back Ryan:

A couple of questions to start; What do you have the initial advance set to? How do the park plugs look? is the current poor mileage and stumbling new? start all at once? How long since the carb has been rebuilt? Have you checked for vacuum leaks?

The DSII conversion is a great upgrade but is not perfect with a stock 1100 SCV. People here have done it with positive feedback, but it is a crutch. The centrifugal advance works great, but the vacuum advance is less than ideal.

On the carb, you can upgrade the 1100 to an 1101 from a '63 - 64 full size Ford with a 223 six. they are rated at 215 cfm as compared to your stock 1100 at 185 cfm. It will have a SCV and be compatible with your LoM distributor and Petronix. The 1101 has a larger throttle bore so you will need to flair the top of the carb adapter to allow the butterfly to clear. All linkage and fuel lines will be the same.

I hope that helps you. Let us know how your trouble shooting is going.

Adios, David

Have you done any testing of the LOD system parts or read the LOD article (see below link) explaining how it operates?

http://classicinlines.com/Loadomatic.asp

If you want to swap in the DSII you could hook it up to manifold vacuum until you can find a 1101. One other carb that works good for a stock or near stock engine is the Holley 1940 these were sold by a Ford as replacement carbs for the Autolite's. Good luck

embergloP51":35qfs3z2 said:

So, I've got a mostly stock 200 I6 in my 1966 Mustang. It has the autolite 1100 and I've got a pertronix in the stock distributor. I've been getting really crappy gas mileage (~12-15mpg) and lack of power/stumbling on acceleration that I can't figure out. I was hoping a DSII might help with that. Do you guys think it might?.

Click to expand...

I had the same thing on my 67, engine came from a 66. When I hooked my timing light up, my timing didn't change with the rpm, even though my vacuum signal was good. Turned out my vacuum canister was shot. I installed a mechanical unit from a 69, woke it right up. I still plan on a dsII upgrade, but I haven't had the time yet.

Keep the Loadomatic and Pertronix and add a CB Performance Black Box to give you a 3D mapped ignition curve. http://www.cbperformance.com/ProductDet ... tCode=2013

This replaces both the centrifugal and vacuum advance with a computer controlled system that is completely configurable in software. CB is a VW specialist but this system is designed to work on 4-6-8 cylinder engines.

It's $199, but CB has frequent sales so you can often get 10-15% off of that.

MustangSix":352d1lf5 said:

Keep the Loadomatic and Pertronix and add a CB Performance Black Box to give you a 3D mapped ignition curve. http://www.cbperformance.com/ProductDet ... tCode=2013

This replaces both the centrifugal and vacuum advance with a computer controlled system that is completely configurable in software. CB is a VW specialist but this system is designed to work on 4-6-8 cylinder engines.

It's $199, but CB has frequent sales so you can often get 10-15% off of that.

Click to expand...

Jack, you still have to program the curve or does it internally?? Bill

NVM, you said it replaces both, doesn't need mech.

Programming is all in software. You have to lock down the distributor advance - easy to do on a loadomatic.

CB supplies a couple of pre-programmed curves that you could start with. I think there are some you can download as well, but probably nothing for a 200 Ford. I would just start with a normally aspirated curve for whatever VW they have loaded. Typically, air cooled VW's have pretty modest advance requirements that any engine could live with. Just tweak it from there.

The only real downside are that you need a laptop and a little bit of understanding how advance curves should look but there are plenty of resources to glean info from.