[Jay Laifman]

Well, I always like to pop up on CIS things - mostly since I love my 73.5 CIS 911, which I've driven regularly for over 25 years now. Just as smooth and drivable as ever. Yeah, some guys will tell you that it can't be modified to increase the hp. Sure. But, sometimes some things just don't need any changes - including the car Pete Zimmerman wrote as Porsche's first "10."

I wonder what ratio of miles 2.4 CIS cars are getting compared to MFI cars.

Anyway, lots of other reasons why you can't put a CIS on top of the other block. Note that the CIS pistons are special too. They have a dished area to control the spray from the injector. I think the cam had to be reduced both because the engine was more efficient and to avoid hitting that special piston.

I think there are plenty of CIS engines that come up from time to time from those guys who want that hotter engine. So, you should be able to pick one up for a good price. The '74 2.7 S CIS engine is particularly nice. Don't know how frequently they come up. But, as you go that direction, there is always a 3.0 CIS engine to drop in there, with its even more robust bottom end.

Jay