ABS to Std. Brakes Conversion

[wcdeane]

Calvin: Would you also check out the web photos of my ABS master brake cylinder? Please compare this configuration to the one on your ?90 SE, which I presume is non-ABS. I have a Lotus dealer looking into the parts necessary to convert ABS to Std. brakes. The conversion is going to be based on the brake parts for a ?90 SE. Our initial guess is that the only substantial difference may be the master cylinder and maybe the pedal push rod. Maybe you could speculate or comment.

www.abstractsbywdeane.com/Lotus.htm

Thanks?Walt ?91 SE

[cnh1990]

The whole assembly is different. The master, reservior, vac booster. The assembly part number is AO82J4147F according to my parts book. I have the ABS part numbers also and they are totally differnt in looks and part number according to the expolded parts diagram for both systems.
Calvin 90 SE non ABS

[wcdeane]

Does your master cylinder mount flush to the front wall, or does it mount to the same bracket that the ABS assembly is mounted to?

[cnh1990]

It appears to be the same bracket. But has a circular vac booster, a differnt master, and even the reservior looks different. It's in the parts book. The master has 3 lines to it. One for each front and a single line to a splitter for the rear.
Calvin

[wcdeane]

I forgot about the possibility/probability of a Vac can for power assist. That Vac can must be hooked up to the engine belt-driven vac pump. How big is the vac hose, and how do you suppose it's routed back to the engine compartment?

[cnh1990]

I'm not real sure but I think there is vac line for the ABS brakes as well. It should be there somewhere. I'm at work and don't have a set of books with like Graham Smith one of a couple of people that always has books nearby. When I get home I will take a good look at the set. Have you explored the possibility of using what you have and just removing the accumilator and ABS module out of the car?
Calvin

[wcdeane]

Thanks, Calvin. I will watch for a reply.

[cnh1990]

The vac line runs through the central core and is T into the line from the vac pump. I do not see a reference to the ABS system. I will check with Dan and Keen at an up comming club meeting to confirm. Only thing it is being held on the 14th. Keen also has 3 Esprit frames with the lines intact from various Esprit's both ABS and non ABS equiped that I can take a look at. He also has the workings of an ABS car so I will take a look at it too. I don't know what I will do when he finally puts the car back together again as it has been sort of my exploded 3D diagram in life size that I can see, touch, and manipulate. I guess that is why I learned the Esprit so quickly, if it were not for the fact that I can stick my head in place where it normally would not fit it would have taken me a lot longer.
Calvin

[wcdeane]

Thanks for the info. It is great that you have such a resource to call upon. I will wait anxiously for the follow-on.

I appreciate the effort, and there is no particular rush. I have a couple of months to get this done.

Adios & Cheers!