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Intake Manifold
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Fasteddie313  



Joined: 29 Sep 2013
Posts: 1999
Location: MI

PostPosted: Mon Mar 23, 2020 9:55 am    Post subject: Reply with quote

My TB/TPS solution would probably work for you..



Fasteddie313 wrote:
Top one is ported, bottom is stock with the ported gasket layed over..

Yeah it's a hand made gasket, not machine perfect..
I scribed the intake through the TB while installed for my porting markings, didn't trace the rough gasket..

The biggest change is how far the small butterfly is moved over to make room for the big one..


It is also a lot more egg shaped than oval as compared to the 931 body..


The black plug is for the potentiometer TPS I'm using and the white plug gives WOT and idle switches, currently unused..

You can see the new TB also has a large vac port behind the big butterfly..

The ported vac port on the opposite side I made..
I also shortened the TB axle about an inch and raised the TPS to clear the intake runners..
I did the spring down there and drilled and pinned the axle..
I laso reground the profile of the end of the axle with a grinder in my X-Y vice and the axle in my drill press..

This TB has needle roller bearings on the axle! Cool...

The exact TB model is mentioned a few posts back..
1990 +- a few years 16 valve automatic VW..

It might not be the biggest possible TB but it is bigger and has a TPS..
It has some parts from the 931 TB and a BMW TB the way I have it..
Works good, don't like the cam on it too much..

CÚdric wrote:
How about a regular mpx 4250, couldn't it do the work?


I think that is for board mount applications right?
My microsquirt is more like a sealed unit.. It's not a DIY board like that..

I also want a 3.5 Bar or better.. Just incase..

Also Cedric.. Check this out..
https://rennlist.com/forums/944-turbo-and-turbo-s-forum/1064333-hi-flow-billet-944-51-turbocharger.html


[QUOTE=msrwerks;111812921]The automatic 16v passat throttle body is what you are looking for. Also Cali digi 1 from 88-92 had them on MKII golf/jetta 1.8 8V.
[IMG]https://dl.dropboxusercontent.com/s/kwekm3cmqsv0zd1/63_1_b.jpg?dl=1[/IMG]

The pinout for the TPS is:
[IMG]https://dl.dropboxusercontent.com/s/7cs3ux32x87vqa6/timbopassattps.jpg?dl=1[/IMG]

Try finding one with a good working TPS as replacing them are in the $200 range unless you can match it up with something cheaper.[/QUOTE]
https://forums.vwvortex.com/showthread.php?9173609-Throttle-body-fitment
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DZGunner  



Joined: 18 Nov 2014
Posts: 171
Location: Great white north

PostPosted: Mon Mar 23, 2020 11:36 am    Post subject: Reply with quote

Thanks Eddie, I just got done pulling apart a spare TB and am going to start looking at how to cut/modify it. I appreciate the good info too.
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