924Board.org

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Thought I'd post on some work from the weekend.

Picked up an Audi 5000 throttle body for $25 Canadian. Using the existing mounts on the Audi piece, I was able to install both TPS sensors from my 1980 924. I only had to drill one new hole, in order to properly mount the closed throttle sensor. When mounting on the intake plenum, I had to cut down the mounting bracket for the open throttle sensor as it interfered with fit, but after this everything went together well. I took the mounting loop for the throttle cable off my old 924 throttle body and installed it on the top of the Audi throttle body. Cable connected up fine, open and closed postions are good.

As for performance gains, I'm sure there is no HP gain, it has been proven again and again that the restriction in the 924 is in the head. However, the bigger throttle body, combined with a cut open air box and cat delete certainly has made the engine sound better, especially at wide open throttle. Engine does seem to rev more freely. Hopefully this bigger throttle body will be of some use next year when my big valve head goes in with the euro spec pistons in the block.

I still have a Weber Redline big bore throttle body which I was never able to figure out how to mount the TPS sensors on. If anyone wants it I've posted it on EBay (item number 7990746065):

http://cgi.ebay.com/ebaymotors/Porsche-924-Weber-Big-Bore-Throttle-Body-also-VW-Audi_W0QQcmdZViewItemQQcategoryZ33558QQitemZ7990746065QQrdZ1QQsspagenameZWDVW
_________________
1987 951 - M193 Version for Japan

timstar92404 · Joined: 22 Sep 2004 Posts: 2075 Location: richmond BC

what would a cut open air box do?
_________________
78 924 sold.
85.5 944

Eturbo924 · Joined: 09 Nov 2002 Posts: 2212 Location: Londonderry NH

It makes your air filter real dirty real fast!

Oh and yes it does make the engine a bit louder.

_________________
1982 924
1992 968
2003 C4S
Parts Parts Parts and More parts.
E-mail me for parts you need!
Drive Fast!

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

Yes, it does make the engine louder. Other than that I'm sure it does nothing else, but I have 2 air box covers, one with snorkel and one I cut open, so I can alternate if I really want to.
_________________
1987 951 - M193 Version for Japan

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

"Big bore" throttle body cross reference:
Neuspeed 3-65.10.xx
Audi 5000 85, 86 non turbo
VW Fox 91 -93
VW Cabrolet 91 -93
VW Golf MK2 8v
_________________
erstwhile owner of just about every 924 variant ever made