daily dry sump

Rip · Post by **Rip** » Tue Jun 07, 2005 9:56 pm

this may be a stupid question but I'll ask anyways. Would let say a CB preformance dry sump work well for daily driven use?

I'd have to get a smaller pulley, so the fan would turn slower, hook up a oil heater, and at idle the pressure would be less than wet sump, but could one be used on the street without problems? Anyone attempt this before?

thanks

Post by **Marc** » Wed Jun 08, 2005 6:56 am

Sounds like you're aware of the weaknesses. No reason why it couldn't be done IMO. After sitting for a few days it's not unusual to find a lot of oil has seeped from the tank to the crankcase - too much and you don't want to try to crank the engine before draining it down. Routine thing to check before firing a race motor, but could be forgotten on a driver.
Adding (and using) a low-restriction isolation valve would eliminate that potential problem, but you'd probably want to rig a microswitch to give you a starter interlock (or at least a warning light) when it was shut.

Rip · Post by **Rip** » Wed Jun 08, 2005 2:14 pm

thanks, but would there be a over heating problem? My only real concern is in stop and go traffic, where I might be stuck at idle.

Would the combination of a smaller pulley and the lower oil pressure be enough to cause the engine to heat up to much?

thanks again

Bruceg · Post by **Bruceg** » Thu Jun 09, 2005 11:39 am

I have been running a dry sump on my daily driver for a few years now with out incident. The bottom of my external oil tank is at the same height as the bottom of the engine sump and I haven’t had any problems with the case filling up over the 4 months that it is stored every winter. I put my filter on the scavenge side and debured the inside of the pump and although I don’t have a gauge I would guess I had more pressure at lower flows because I don’t have the drop across the filter. I added a 356 alternator pulley to compensate for the power pulley that I had to add for clearance, so my fan speed is a bit faster than stock. I have no problem with cooling and run a stock doghouse and T1 cooler with no external oil cooler, 2275, 86B etc.

Rip · Post by **Rip** » Thu Jun 09, 2005 11:53 am

thanks bruce, but just wondering how hot does it get in BC? I'll be running a DTM on my type IV, so I may just have to add an ext cooler and I should be fine.

rip

Bruceg · Post by **Bruceg** » Fri Jun 10, 2005 11:43 am

I have been stuck in traffic in as hot as 30c (85f?)

Rip · Post by **Rip** » Sat Jun 11, 2005 12:40 pm

thanks again