924Board.org

[924-76]

I'm trying to get everything together to convert my 931 to the GTS intake manifold.
On the 931 intake, there is 2 post throttle body air connection, 1 by at fire wall next to the 5th injector and 1 under runner #1 that goes to the turbo recirculation valve.
On the GTS intake there is only one 1 post throttle body air connection, under runner #1. See pics here:http://www.924board.org/viewtopic.php?t=42969

Can those 2 connections be combined by a Y connector to a single intake location (under runner #1)?

Thank you
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1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

[ideola]

On the S2 intake manifold, the port by the cold start valve is used to provide MAP to the DITC. (It is also a convenient place to tee off of for other MAP reference, such as boost gauge and progressive water-meth injection controller).

I can't think of any reason that you shouldn't be able to tee off of the port on the bottom of the runner. The MAP had better be equal across all runners, otherwise you have other problems!
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erstwhile owner of just about every 924 variant ever made

[924-76]

Dan, you are raising a good point about being equal across all runners.
If I'm not mistaking, the port by the cold start valve is the entry for the auxiliary air regulator.??? Going off memory, correct me if I'm wrong.
Would this be problematic if it feeds on 1 runner?
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

[924-76]

More pictures








_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

[924-76]

Still try to figure out what the small threaded port next to the cold start valve is for?
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

[Carrera RSR]

[924-76]

[Carrera RSR]

[924-76]

[RC]

So where is the vac take off for the brake booster?
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World`s quickest 924 2L slushbox

[924-76]

I might modify the small threaded port next to the cold start valve to be similar to the turbo intake air port. This way, everything would connect the same way as the turbo intake.
I'm hesitant to modify it, but it would ease the installation.
Suggestion anyone
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

[morghen]

make an adapter...don't modify the part
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Supercharger and EFI kits
https://www.the924.com

[924-76]

[ideola]

As I posted earlier, that small port is for the MAP reference line that goes to the DITC. You can use it also for MAP reference to boost gauge. Use the large port on the bottom of runner one to create a vacuum manifold for everything else, including brake booster.
_________________
erstwhile owner of just about every 924 variant ever made

[924-76]

Thanks Dan
I was worry about feeding the AAR to only 1 runner, but re-thinking about it, vacuum should balance it-self trough out the runners.
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP