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-   -   What intake are you running in your 3.4? (http://forums.pelicanparts.com/porsche-911-technical-forum/936515-what-intake-you-running-your-3-4-a.html)

911 Rod 11-21-2016 09:21 AM
What intake are you running in your 3.4?
 
What intake are people running?

1986 911

I had by engine rebuilt to 3.4 with 9.8:1. 964 cams. Lightened clutch and flywheel. Headers.

I think I know what route I am going to take, but curious what everyone else has done.

Fly911 11-21-2016 03:20 PM
I'm running Jenvey ITB's on my '87 Carrera, but with much bigger displacement and wild cams.
For a 3.4L and 964 cams I would extrude hone the intake manifold and bore out the TB. I would also ad a resonance chamber between the two intake manifolds (weld on a 2.5" aluminum tube) and make a DIY IPD plenum for better airflow. I made an IPD style intake on both my 993 and 996, and it works just as good as the original, to 5% of the cost...

will hung 11-22-2016 05:23 AM
Quote:
Originally Posted by Fly911 (Post 9367646)
I'm running Jenvey ITB's on my '87 Carrera, but with much bigger displacement and wild cams.
For a 3.4L and 964 cams I would extrude hone the intake manifold and bore out the TB. I would also ad a resonance chamber between the two intake manifolds (weld on a 2.5" aluminum tube) and make a DIY IPD plenum for better airflow. I made an IPD style intake on both my 993 and 996, and it works just as good as the original, to 5% of the cost...
Could you share some pics? I'd like to see this.

911 Rod 11-22-2016 05:30 AM
Quote:
Originally Posted by Fly911 (Post 9367646)
For a 3.4L and 964 cams I would extrude hone the intake manifold and bore out the TB. I would also ad a resonance chamber between the two intake manifolds (weld on a 2.5" aluminum tube) and make a DIY IPD plenum for better airflow. I made an IPD style intake on both my 993 and 996, and it works just as good as the original, to 5% of the cost...
stock injectors and the stock AFM?

ChrisBennet 11-22-2016 05:13 PM
I'm running a stock 3.2 intake.
3.4L, 10.5:1 compression, stock 3.2 cam, Sal Carceller's MAF and splitter.

911 Rod 11-23-2016 05:23 AM
Quote:
Originally Posted by ChrisBennet (Post 9369160)
I'm running a stock 3.2 intake.
3.4L, 10.5:1 compression, stock 3.2 cam, Sal Carceller's MAF and splitter.
Sal's MAF is not a stock intake.

ChrisBennet 11-23-2016 05:42 AM
Quote:
Originally Posted by 911 Rod (Post 9369533)
Sal's MAF is not a stock intake.
I meant stock intake manifold, sorry.

mnez 11-23-2016 07:47 AM
Quote:
Originally Posted by 911 Rod (Post 9367151)
What intake are people running?

1986 911

I had by engine rebuilt to 3.4 with 9.8:1. 964 cams. Lightened clutch and flywheel. Headers.

I think I know what route I am going to take, but curious what everyone else has done.
Extrude honed intake manifold, bored throttle body, Autothority MAF with custom Steve Wong chip. Same 9.8:1 3.4 with WebCam 20/21 cams.


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