Notices
944 Turbo and Turbo-S Forum 1982-1991
Sponsored by:
Sponsored by: Clore Automotive

65mm Throttle Body

Thread Tools
 
Search this Thread
 
Old 07-20-2018, 07:13 PM
  #1  
Tom M'Guinn

Rennlist Member
Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 12,567
Received 533 Likes on 287 Posts
Default 65mm Throttle Body

I finally broke down and got a CNC Aluminum 65mm throttle body that lines up with the factory intake and bolt pattern. Throttle cam and TPS fit right on, although you'll need to make up a little mounting plate out of sheet metal for the TPS. There is no idle circuit, but instead an idle stop screw that is intended to let you crack the plate as much as needed. Time will tell how well that works. Overall, it looks very promising and well built. Will need to hog out the opening at the front of the intake, in lieu of using the big spacer that comes with the tb. I opted for the fancy one because it looked like the best fit, but there are similar ones for half the price. I figured for $62 it was worth taking a flyer on, and so far so good! What do you think?

https://www.ebay.com/itm/Universal-6...0.H0.TRS5.TSS4



Bolts right up, with tps and throttle cam in the right places.


Throttle cam uses same system as factory throttle cable, thought it may 10mm further out (toward the fender) compared to stock.


TPS shaft is virtually the same as stock. The mounting ears on the TPS stick out beyond the mounting holes on the TB, so will need to make a little plate to bolt it to.


The mouth of the intake will need to be port matched, both for flow but also so the throttle plate doesn't touch it when it opens. It just skims the intake without a gasket, so that's probably a non-issue with gasket installed.
Old 07-20-2018, 11:22 PM
  #2  
Noahs944
Race Car
 
Noahs944's Avatar
 
Join Date: May 2013
Location: Calgary, Alberta, Canada
Posts: 4,015
Received 229 Likes on 168 Posts
Default

Coolness. Thanks for the great pics and intel Tom!
Old 07-21-2018, 12:10 AM
  #3  
David Floyd
Addict
Rennlist Member

 
David Floyd's Avatar
 
Join Date: May 2001
Location: Tennessee
Posts: 7,109
Received 4 Likes on 4 Posts
Default

Another interesting adapted product Tom has brought to our attention, I know you have tried several different TB over the years, let us know what you think
Old 07-21-2018, 11:16 AM
  #4  
Jay Wellwood
Addict
Lifetime Rennlist
Member
 
Jay Wellwood's Avatar
 
Join Date: May 2001
Location: Hotlanta - NE of the Perimeter
Posts: 12,269
Received 267 Likes on 154 Posts
Default

Nicely done Tom. Looking forward to the results after your installation.
Old 07-21-2018, 12:41 PM
  #5  
Tripl7
Instructor
 
Tripl7's Avatar
 
Join Date: Feb 2015
Location: Lansing, MI
Posts: 148
Likes: 0
Received 0 Likes on 0 Posts
Default

Looks great Tom! Bolton parts for us that don't break the bank, can't get much better than that
Old 07-21-2018, 11:25 PM
  #6  
fejjj
Rennlist Member
 
fejjj's Avatar
 
Join Date: Sep 2010
Posts: 2,355
Received 74 Likes on 39 Posts
Default

Thank you for taking the time to share and document this.
Old 07-22-2018, 03:48 PM
  #7  
Dave W.
Burning Brakes
 
Dave W.'s Avatar
 
Join Date: Apr 2011
Location: SF Bay Area
Posts: 850
Received 9 Likes on 9 Posts
Default

Looks good. How is the clearance between the bottom of the TB and the top of the turbo?
Old 07-22-2018, 04:00 PM
  #8  
Tom M'Guinn

Rennlist Member
Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 12,567
Received 533 Likes on 287 Posts
Default

Originally Posted by Dave W.
Looks good. How is the clearance between the bottom of the TB and the top of the turbo?

Good call. It will probably take some grinding on the TB for big turbos, but it doesn't have the idle return spring bracket underneath, and there is ample extra aluminum under there -- so hopefully that won't be a real issue.
Old 08-05-2018, 09:27 PM
  #9  
Noahs944
Race Car
 
Noahs944's Avatar
 
Join Date: May 2013
Location: Calgary, Alberta, Canada
Posts: 4,015
Received 229 Likes on 168 Posts
Default

Tom,

What did you do about the vacuum line that normally runs to the oem TB from the fuel vapour canister diaphragm in the left corner between brake booster & upper strut mount?.
Old 08-06-2018, 12:45 AM
  #10  
Tom M'Guinn

Rennlist Member
Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 12,567
Received 533 Likes on 287 Posts
Default

Originally Posted by Noahs944
Tom,

What did you do about the vacuum line that normally runs to the oem TB from the fuel vapour canister diaphragm in the left corner between brake booster & upper strut mount?.
I haven't actually tried the TB on the car yet, so will have to mull that over. The TB definitely doesn't have a port for the evap, so it'll have to get in some other way...
Old 08-06-2018, 04:20 AM
  #11  
ealoken
Three Wheelin'
 
ealoken's Avatar
 
Join Date: Aug 2016
Posts: 1,331
Received 114 Likes on 72 Posts
Default

I bought the same TB, thanks for the link.
Old 08-06-2018, 11:21 AM
  #12  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Nashville, TN
Posts: 45,497
Received 633 Likes on 490 Posts
Default

*redacted*

Last edited by V2Rocket; 08-06-2018 at 01:05 PM.
Old 08-06-2018, 11:48 AM
  #13  
SamGrant951
Race Director
 
SamGrant951's Avatar
 
Join Date: May 2001
Location: Indianapolis, IN
Posts: 10,861
Received 33 Likes on 28 Posts
Default


At the bottom.
Old 08-06-2018, 06:48 PM
  #14  
Tom M'Guinn

Rennlist Member
Thread Starter
 
Tom M'Guinn's Avatar
 
Join Date: Jan 2002
Location: Just CA Now :)
Posts: 12,567
Received 533 Likes on 287 Posts
Default

I did this on another TB to add 5mm of clearance, so something similar may work, after some drilling...

Old 08-06-2018, 06:56 PM
  #15  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Nashville, TN
Posts: 45,497
Received 633 Likes on 490 Posts
Default

anybody know a common source for small diameter brass tubing like that?


Quick Reply: 65mm Throttle Body



All times are GMT -3. The time now is 05:03 AM.