trying to find a two row (dual groove v-belt) crank pulley

[reynard]

I am looking for a two row (dual groove vbelt) crank pulley for a twincam. I bought a spare block/crank/timing chest etc. and it came with a two row crank pulley set, so I know thyey exist, but the crank pulley was very pitted and can't be used. The two row pulley on the water pump that I got is fine so I can reuse it. I wanted to add AC to my Plus 2 and was hoping that someone out there might have a two row crank pulley that they might be induced to part with.

I appreciate the help. As always, thanks. -Andy Anderson, Fort Worth, Texas

[gerrym]

Paul, hopefully this reply gets you on the road to a solution.

Burtons (Ford specialists) do Powergrip toothed belt kits for Ford engines and list a fitment for X-flows, LTC etc (same kit)

They also list a Poly-V kit (metric multiple V profile) for X-flow water pump and alternator. Reading the part number for the replacement belt, it's a 6 groove pulley system. Could you convert the compressor pulley to a 6 groove drive?

Or machine off some of the un-used grooves?? Have you checked the belt tension you will need to drive the compressor? Think of that poor little water pump bearing in the LTC. For a long life it needs to run as slack as possible but obviously this will not be possible if you are also driving an air-con compressor.
https://www.burtonpower.com/product_main.aspx?home.aspx
Regards



Gerry

[reynard]

Thanks for the information. I plan to use a belt tensioner pulley or a simple crank-to-compressor pulley arrangement, and not even pass the belt over the water pump to avoid undue stress on the pump bearing. I do have one of the two row crank pulleys from a Cortina, but it too degraded by rust to use. Thanks again for the help.

Andy - Fort Worth, Texas

[gerrym]

Andy aha, I understand your plan!.

The pulley you are looking for is essentially two standard V grooves stacked (with two separate V belts). The inner to run the pump and alternator (or generator) and the outer to run the compressor. Good scheme to prevent loading the water pump bearings.

I guess if you keep looking, a suitable crank pulley might turn up. However, you might eventually have to get something made up. (just a thought, check out the Burton site for the blank shaft section for the seal: I think the idea is to bolt the pulley flanges onto this. If you can bolt one, then you could bolt two...??).

Not much help to you I know, but I managed to get a compressor mounted to the Zetec in my Plus 2. A very long job making all this fit within a very small engine bay!

Regards

Gerry

[bast0n]

Reynard

See my post in the "Alternator install questions" thread and you will see my twin pulley system. PM me if you cannot find it and I will send you all the info on my setup.

David

[reynard]

Gerry and David (and everyone else as well),

Great information, Thanks so much. Exactly what I needed! I think I will try to mount my 4" two groove pulley on the lathe and clean up the rust pitting in the grooves a bit. The area where the crank seal rides is fine, so no problems there. I will post any results/explosions. Worse comes to worst, I'll have a shop make a pulley from the old two groove pulley dimensions.

Take care,

Andy Anderson

[locort66]

any news on this?

[reynard]

I was asked where I got the two row pulley that I do have. I did some research, and it most likely came from a late Cortina, as they needed to run an air pump to meet emissions in the US. I am trying to find A/C brackets for the 1600 Pinto or 1600 US Capri (Ist Gen) . I had a 1.6L Capri with A/C back in the day so I know that they exist. So far, no luck, but I was hoping that they might be the enrie solution for brackets, the hardest part to find after the pulley! The only glitch in this method is if the brackets/installation for the pushrod 1600 setup interferes with the twincam head.

If I can't find something ready-made, I will design and weld up the beackets, and keep you all posted as soon as it is successful (operative word). I plan to completely replace the Plus 2 heater unit with a Vintage Air/Heat mini unit in the cabin, but use the "eyeball" vents, etc. There is a tiny A/C compressor unit made for the Geo and others like it that a lot of people with small cabin volume needs (hot rods, etc) use. Othewise I will use the smallest Sanden. One of the reasons that the older units were such power hogs/steam generators was that the systems were adapted "Universal" systems (example: Coolaire of Miami) with piston style compressors built for huge american cars. The heat loads were unreasonable for the Lotus engine and colling system. With a standard fit, enlarged radiator and oil cooler, my design should easily be able to handle the appropriate increase in heat load.... but then I am in Texas, so it should be over-engineered for everyplace else, including hell.

I can't get back to the Lotus until April 1st (how appropriate) but will definitely post any successes.

Also, the photos and the information from everyone on the Forum has been great. Not just the technical, but the encouragement and even reasoned discouragement. When you see someone driving an Elan, for whatever it's worth, you know they are willing to get their fingernails dirty. It's an important part of the car/driver relationship. Buying any early Lotus (up to the origami designs) doesn't just get you a car. It gets you a sea of enthusiastic support... even at three in the morning.

Wherever you are. Thanks again.

Andy Anderson
Fort Worth, Texas