Intake plenum and 911 throttle body - Page 3 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Ben006 · 03-03-2015, 04:09 PM

For now the list is this thread

I'm still waiting for some hardware (from various places, to see wich one will be the best, that's why it takes some times).

Ben

Ben006 · 03-06-2015, 09:01 AM

Hi !
Two more parts to get and I can test the T ! I can't wait !

The nuts fit in as designed

I will test it on a dyno the 11th of ... April ... It's a month to wait, but it's the only time I can dyno it. during my school car show !

KRAM36 · 03-17-2015, 07:09 PM

Anymore pictures to share? I'm very curious on what you have going on. I need a different distribution T and the 997 Distribution T is too big, it also has this thick piece I marked in red that hits the top of my starter and I can't get a good down angle on the TB.

I really don't want to change the intake as the car is running like a beast right now. I suppose I could take it back out, shave off that area and reinforce it by melting some wire into it.

.

Ben006 · 03-19-2015, 02:20 PM

now I'm stuck on the testing because I have no place to work :/
I don't need to do much, but I can't do it at home because my 93YO neighbour will report me for doing so ...

Monday a friend should lend me is garage for few hours and I will finally get this thing done !

The only thing I did is a little sanding to smooth the outside and got the EVAP port enlarged a little.

I hate wasting my time like that, waiting.

If anyone want's to offer me a little clean place to work at for a few hours, he's welcome

tommy583 · 03-19-2015, 08:32 PM

This is an interesting thread. Being that I have a non e-gas model the only way I can find to get a larger throttle body is the Pedro's bore service. His site says they bore the stock one out to 75mm. So if I do this I would be in the market for one that would fit that. Is that a possibility?

edc · 03-20-2015, 01:33 PM

Non e-gas 3.4 911 throttle body.

tommy583 · 03-20-2015, 03:07 PM

Quote:

Originally Posted by edc

Non e-gas 3.4 911 throttle body.

Thanks edc, I was thinking this would work as well. But I was unable to find one online last night to be sure.

Reebuck1 · 03-20-2015, 03:50 PM

Kram36....What size engine are you running?? 996 3.4 or 3.6?? and what size throttle body are you using?? Thanks....I too am waiting to see how Ben does !!

KRAM36 · 03-20-2015, 06:42 PM

Quote:

Originally Posted by Reebuck1

Kram36....What size engine are you running?? 996 3.4 or 3.6?? and what size throttle body are you using?? Thanks....I too am waiting to see how Ben does !!

Stock 3.2, 76mm TB.

Ben006 · 03-20-2015, 05:48 PM

Yes I can do one for the 2.5 too, but since the 2.5's plenum is very different from the 2.7 and 3.2's plenum I will need to take the mesurement from a 2.5L one

My friend told me Monday, I hope I will be able to do it and that all my measurement were right !

cross your finger with me

Ben006 · 03-25-2015, 10:48 AM

Hi !

As planned I found a garage Monday to finally work on the intake !

and... it doesn't fit ... nothing bad, but the straight T shape makes the TB bump against the starter and force the intake elbow to stick too far up.

Nothing that a slight angle can't fix

I will make another one soon.

I also noticed that the temperature in the engine bay was higher than I thought on a hot Florida day !
So I put the T back into the oven to see if it can handle 240F ... result, it can

I will just make it thicker in some place for added strengh and peace of mind !

It takes time, but I'm on the right way

Ben

Ben006 · 03-25-2015, 11:59 AM

I also think that I will try a flow divider like in the 987 :

without the flap, but it's a great way to ensure that both sides receive the exact same amount of air despite having to make a tighter turn on the left side !

KRAM36 · 03-25-2015, 03:13 PM

Curious why the air is making a tighter turn to the left side?

Ben006 · 03-25-2015, 05:23 PM

because I'm not going tu use a straight T shape any more, it will be tilted 10°

I will show you as soon as I'm done with the software.

The shape will look weird, but I'm trying to direct air equally on each side, not that easy ...

I'm going to try another route, like the oem (longer tube after the TB), and see if I can come up with a better, more balanced shape

also, the problem with a big divider is that it's going to "seal" the to banks from each other, and makes you loose top end power (sorry, I lack technical vocabulary to explain it correctly in english).

So ... I'm working on it

If anyone has any idea, feel free to share

Ben

KRAM36 · 03-25-2015, 05:37 PM

TRK (The Radium King) would probably be the one to consult on that.

Ben006 · 04-02-2015, 07:43 AM

Hi !

I made modifications to the T, with an angle, the TB should point slightly to the left.
this way it should clear the stater solenoid.

Now I need to see if the engine cover will clear the intake elbow.

I want to get it 100% right before printing it.

Jake Raby · 04-02-2015, 07:59 AM

Remember, the short radius is what matters with any normally aspirated engine. I see people wasting their time with induction components, because they don't understand how dry flow really works.

Ben006 · 04-02-2015, 04:16 PM

Yep

But the space is tight, and the TB is really bigger than the 986 one, so I try to find the best shape with the room I have.

Ben006 · 04-20-2015, 12:43 PM

Hi !

I did have a lot of free time to work on the intake, but I think this time I'm good !
I realise that trying to make it simple in shape ... would making it harder to fit ...
So I copied the stock shape. It took me some time to get the angles as clos as possible to the stock T, but I think I'm close.

This way, It will clear the starter solenoid, and the engine cover

tell me what you think

Ben

Reebuck1 · 04-20-2015, 05:44 PM

Great Ben!! When will you be able to make a few??
What material will you use (heat sensitivity)?