Originally Posted by MrBonus (Post 11890329)

Damn, that thing is a work of art.

Originally Posted by ToySnakePMC (Post 11890575)

Love seeing updates and pics on this thread - one of my favorites. Planning to sneak by the shop and see Mr B’s air cooled toy sometime this coming week.

Originally Posted by PeteKz (Post 11892390)

Side question: I have the complete carburetors (40IDTP.3C), throttle linkage, air filter box, etc. system from a 1969 911. I have listed it for sale in the local PCA region, to clear it out of my garage. I have CIS on my 3.2 engine in a 1973 911T, which I like, but sometimes I wonder about installing an ITB FI system. Would there be a good reason to keep the air filter box from the 1969 carb setup for future ITB system? Or should I just sell the whole carb setup complete and buy what I need if/when I go to ITBs?

Originally Posted by PeteKz (Post 11892390)

Side question: I have the complete carburetors (40IDTP.3C), throttle linkage, air filter box, etc. system from a 1969 911. I have listed it for sale in the local PCA region, to clear it out of my garage. I have CIS on my 3.2 engine in a 1973 911T, which I like, but sometimes I wonder about installing an ITB FI system. Would there be a good reason to keep the air filter box from the 1969 carb setup for future ITB system? Or should I just sell the whole carb setup complete and buy what I need if/when I go to ITBs?

Originally Posted by Showdown (Post 11897590)

https://uploads.tapatalk-cdn.com/202...b9d1aee202.jpg

RHD ITBs running Megasquirt.
Otherwise stock engine for now (Melissa/M1 cams to come…?)
Plenty of custom fabricated/modified bits and pieces.

Originally Posted by Clay Perrine (Post 11727984)

I recently purchased a 935 Style flat fan for my 4.0L 964 motor. So now I can't use the factory intake or throttle body assembly. So I decided to go ITBs, coil on plug, and MS3Pro injection.

I found two sets of BMW K1300S Motorcycle throttle bodies that came like this:

http://www.914world.com/bbs2/uploads...1656292307.jpg

I cut them apart into individual throttle bodies, removed the studs and tapped the stud holes to M6x1.0.

I already had a set of MFI throttle bodies that were so corroded that they could not be saved. So I removed the throttle shafts and linkage from the MFI throttle bodies. I opened the slots on the shafts, and the BMW throttle butterflies fit perfectly. I had to cut the end off the shaft from one of the BMW throttle bodies and weld it onto the MFI throttle body shaft so I had a TPS drive. I pressed the cross shaft bearings out of the plastic MFI stacks for reuse as well.

Using a sheet of plywood, I built a jig to hold the throttle bodies in place with the fan so I can build the linkage and wiring harness before tearing apart the current Motronic setup.

Some time spent with Fusion 360 and a purchase from Send Cut Send, and I now have this:

http://www.914world.com/bbs2/uploads...1656292090.jpg

http://www.914world.com/bbs2/uploads...1656292108.jpg

http://www.914world.com/bbs2/uploads...1656292120.jpg

http://www.914world.com/bbs2/uploads...1656292135.jpg

I still have to make the correct length linkage to go from the crossbar to the center throttle bodies. And to do that I have to buy a M5x0.8 left hand thread die. I considered drilling the throttle bodies for idle air bleed screws, but I can compensate for that with the MS3Pro programming.

This setup is going in my 914 chassis, so it will actually go in with the crossbar at the flywheel end of the motor. I am going to make a throttle cable mount that will attach to the 4-6 side throttle bodies so I can hook directly to the crossbar with no additional linkage.

Originally Posted by chrisbalich (Post 11357073)

There's been a lot of discussion about power increases (expected vs realized) and about drivability.
But I just got back from a 60 car rallye in the mountains of WV and I can assure you all of the ITB/EFI guys got markedly better fuel economy than the CIS guys. Doesn't sound that important until you get to the bottom of the mountain on Monday morning to tank up and head home and find there is no gas at the station. I wasn't worried as I knew my 1/2 tank would easily get me to the next station. My friend next to me in a CIS car was worried. (we did both make it to the next fuel station)