924Board.org

[JasonO]

Lovey day here in N.Z summer sun/winter air,and a day off work none to complain.
just pottering around with our car today fluffing about repainting window wipers an sitting thinking about future inter-cooler idea's which for the moment will entail a scoop as well (also have one).
Now we have an top mount inter-cooler designed to fit a round throttle body but our motor has the oval throttle body...
Question is....
What would be the most practical and logical way to fit this?
My first though is a silicon adapter, but from the way is see it there's no "gap" to fit this between the two parts
second idea is we have a round throttle body setup in the garage,should we consider having these swapped over if its practical or possible
Any thoughts of good ideas?

[Grenadiers]

Easiest way is to procur a Series II throttle body.
_________________
'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[leadfoot]

[JasonO]

Sounds like good start
So what I though was the throttle body?


Is bolted with a different pattern one is square the other rectangular,but is cleaning up and mounting all of this the way to go?


cheers

[RC]

Looks good.
That`s the way to go. Those S2 manis may even flow slightly better, or be better balanced between cylinders, so its a step forward anyway.
_________________
World`s quickest 924 2L slushbox

[leadfoot]

if you do go that route you'll also need the bracket/make one for the throttle cable as it pulls from the other side,
stu
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

[Grenadiers]

Just remove the nut on top, remove the throttle cam, and reuse your original setup, just the top arm. Not sure which bracket though for the cable stop, try both.
_________________
'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[ideola]

Agree with all above...the S2 intake and TB are the way to go, and the throttle linkage from your S1 setup should be adaptable (if not direct bolt-on) to the S2 setup.

From what I can tell, there aren't any differences in the runner lengths or geometry of the S2 intake, aside from the TB mounting flange. One of the things I really like about the S2 intake conversion is that it provides a conveniently located port for plumbing in a boost gauge, right at the back of the intake manifold. On an S2 car, this is used to send MAP signal to the DITC unit; it is the ideal location to take your MAP signal for a boost gauge, and you can even use the OEM banjo bolt and fitting (if it came with your intake). It also has a large port just behind the throttle body where the DITC's intake air temp sensor would have been mounted...I usually just leave the IAT in place to plug the hole and don't worry about connecting it when doing the conversion on an S1 car (you can see in your photo above that the IAT is still intact).

However, the big benefit of the S2 arrangement is that you get rid of that leaky rubber boot of the S1. If you're not aware, there are three big rubber o-rings that you'll need to seal the S2 TB. There is one that goes between the TB and the intake (i.e. it does NOT use a paper gasket here, but an o-ring that sits in a groove in the square TB); a big fat red o-ring that goes on the TB itself, which will fit down into the opening of the intercooler; and a large black seal with kind of an L-shaped profile that will be partly visible when installed, which provides final sealing of the TMIC-to-TB interface (you can actually see this seal still intact in your photo above).

Also be aware that the S2 TBs have tiny little o-rings which seal the needle bearings along the butterfly shaft that can and do fail, causing boost leaks and unsteady idle. I have a reseal kit for those if you're interested, which includes all new mounting hardware, the first seal mentioned above, new o-rings, etc. (I can also source the other two seals mentioned above).

_________________
erstwhile owner of just about every 924 variant ever made

[ideola]

Forgot to mention, you will want to remove the WUR that is on the S2 mani in your photo, and retain the correct WUR for your S1. The WURs are matched to the AFM / fuel dizzy assembly, so you should keep the correct parts together, otherwise your fueling will be screwy.

Also, another little detail is that you will need to adapt your under-bonnet wiring harness where it connects to the S1 microswitches; it will need to be adapted to connect to the single TPS-style switch on the S2 TB. There are instructions on the board here for how to do that, just don't recall offhand where...it's not a difficult mod, I just can't recall offhand which connector goes to which pin. This task is made easier if you can source used connector for the TPS and turn it into a pigtail for splicing into. There are at least two different types of TPS style switches that I've seen on S2 cars...I'm not sure why the difference, but let us know how many pins is in that TPS switch and we may be able to help you find the correct pigtail.
_________________
erstwhile owner of just about every 924 variant ever made

[Grenadiers]

Guess, a one sentence answer isn't quite the answer! I have a Series II pigtail I'm not going to use, for the WOT switch if you need one.
_________________
'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[JasonO]

[ideola]

Yep, that's it...so you need a three-conductor pigtail. Don't think I have one, but if Dave does, and you're planning to order some other items, I'm sure Dave won't mind sending to me so we can help you consolidate shipping.
_________________
erstwhile owner of just about every 924 variant ever made

[Grenadiers]

I can do that! I'll look for it on saturday. yo.
_________________
'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[JasonO]

Thank you! Let me know what its worth to you

[JasonO]