You probably wouldn't have any problem making 400+ hp out of your 330. If it's an original 1984, you have big port oval heads which can be used with some work to them (many posts on these heads). Your weak link may be your tranny depending if it's a Merc or a Borg Warner. We 500 hp behind two Merc trannies in a Scarab with no problems. When we added blowers and upped the HP over 600, we started shredding Merc Trannies. The Borg Warners are supposedly stronger. We had no problems with the TRS drives themselves.

I'm not sure which tranny I have. Is it marked somewhere. I'm guessing its orginal. Did they put the Borg Warners in them from the factory or is that a after market tranny?

Rob

They came from the factory. The 1981 Scarab had the Merc trannies in it. My buddies 1986 Scarab Panther had the Borg Warners in it. No problems whatsoever with the drives or trannies in the 86. Did blow a flex plate, but that was about it. Not sure what year Merc switched or if they sold both at the same time.

I'll have to look at mine. It should be marked Borg Warner somewhere right?

Rob

It should say something I would think, but can't really remember. If you can find a diagram somewhere, the differences are pretty obvious. The Merc Trannies are very small in comparison to the Borg Warners. If you only plan to run 400-450 hp, I think you would be fine with either. The 81 Scarab was hamered pretty well and the Merc trannies stood up with 500 Hp...

The MerCtrans II is a one piece bell housing/tranny unit. Merc used B/W's in their higher HP stuff but did put the MerCtrans behind a # of 330's. They also used both the 71C and 72C B/W's in their TRS performance stuff with the 72C being stronger and an inch longer that the 71C, which in turn is over 6 inches longer that the MerCtrans II. Confused enough yet?? --- Jer

yea thanks. im really confused now. I'm going to check it out sometime this week. wil it be stampd 71c or 72c somewhere?

Yeah, or 1017 or 1018 for the B/W stuff. --- Jer

Great thanks!!

Rob