Mocal vs Tilton oils cooler pumps, One better than the other? Options

[pcar916]

I'm adding a cooler and pump to my transmission. These two pumps are similar in specification and both companies have been around a long time.

Tilton: http://www.summitracing.com/parts/TIL-40-524/

Mocal: http://www.racerpartswholesale.com/product...ial_Cooler_Pump

I know several of you run Jabsco Water Puppy pumps, but I see no advantage to it over the Mocal or Tilton.

Anyone out there with experience as to whether one is more reliable than the other?

[john rogers]

I would recommend calling several shops that RACE vintage 911s and 914s with high revving engines and see what they use and recommend. I bought a complete setup from Jim Patrick in Phoenix as I didn't have a lot of time to run around and gather up all the bits and pieces. Several things to note:

- Yes you have to open the case so you can drill and tap for the nozzle over the ring and pinion as that is the heaviest loaded on a race box. As noted the limited slip also does generate a bunch of heat AND you do not want to have any chance of chips left in the case.
- The direction of oil spray is immaterial as any excess will splash off the gears and not cause any type of hydraulic locking or such. Just make sure one goes on top of the R&P
- You will need to add a closed vent run to your puke tank since you will be running an extra quart of trans oil (4 total now) to make up for the new plumbing, cooler, etc.
- Add a switch so you can turn the pump on/off or leave it run after you shut off the engine when done with a race group.
- Most 914s I have seen put the cooler in the floor of the rear trunk and vent air into it and out the botom. I added a small boat type axial fan to help out when it is really hot.
- Use stainless braided lines for the suction and returns since they are in a position at the rear that gets a lot of abuse from road stuff.
- Patrick sells a replacement plug for a temp gauge so you can see what the trans temp is doing, very handy to have.

I had run a cooling system for 5 years since putting the six in the race car and never broke a gear box and the ones that Wayne Baker, Frank Beck and Jim Patrick all raced never experienced any failures as far as I know.