Whiskey Bravo

My Feedback: (31)

I have used the B&B type of smoke pump for years with excellent results utilizing several brands of engines, DAs, Brisons, etc. and all have come already tapped for pressure. I recently purchased a new ZDZ super 80, my first ZDZ, and asked RR Showcase where to tap the crankcase for pressure. Their response, "You absolutely CAN NOT modify the engine in any way! We DO NOT recommend a crankcase pressure tap. You must use a variable rate electric pump setup for smoke."
Get real. I understand their warranty concerns but that aside I am not going to just drill into it and leave metal filings etc. floating around inside. I have worked on many engines and done properly this is a simple modification. Having said that I have noticed that ZDZ engines seem to have different operating parameters compared to the main stream so to speak i.e. higher octane fuel requirement, 40:1 oil mix as opposed to somewhat lower percentages for other brands but I guess that just comes with the territory and the ones I have observed seem to run well.
If you have made this modification I would like to hear/see where you placed the tap.
Thanks.

Antique

My Feedback: (4)

I don't know what the problem could be, a pressure tap anywhere in the case should be fine...the pulse is a dead end thing anyway, there is no transfer of pressure anywhere...The B&B smoke pump operates exactly line the pump in the carb, crankcase pulses act on a diaphragm in a closed circuit....
I have not modified a ZDZ, just many other engines...
Maybe they don't want you drilling a hole for that 1/4-28 pressure tap ?