[Jacobsen]

Just a quick rundown of my Porsche Cayenne Throttlebody install. The TB is ID 78mm as compared to 72mm original and a lot cheaper than F360 (76mm) or F430 TB´s (80mm) that is the usual choice. I bought a second han one of Ebay for 50£.

First of I did not really know what to expect and reports from others are not consistent. But I like tinkering and realized I could do it for little money so went ahead.

I am a mechanical engineer by trade so first was to design a suitable adapter to soften the increase from 72 to 78 and allow for easy installment. I drew it up an had it 3D printet in PA6. I was concerned about air thightness initially but it was no issue. The adapter is 16mm thick.

Pictures
1. Previous setup. CDA airbox - silicone bend - AFM - silicone bend - TB
2. Cayenne TB - adapter - Silicone bend reduction - clip
3. Closeup adapter
4. Adapter installed with M6x20. Holes for TB threaded M6
5. TB installed with original screws
6. Final install. TB plugged in.


First start was almost normal. Iddle took a little longer to settle in. It came to rest at 700 like normal.

So on to the driving experience. Theres a big difference in throttle response. It comes on much stronger and makes driving fast a lot more effortless. Slow driving is not affected. WOT seems a tad quicker but hard to tell. I dont think you gain any hp but I would certainly do for the driveability. It just feels a lot more eager to move up the rev range.

I have been running the car for a week now and no issues so far.

I am due a RR session soon so might switch setups on there to measure.

If there is interest I could make the adapter open for public printing on Sculpteo. http://www.sculpteo.com/en/s/jacobsen/

 

[moynesey]

Hi,

Nice adaptor plate, did the wiring loom connector fit the Porsche TB?

Did you consider making the length of the adaptor longer to allow a more shallow decline between the 78mm opening to the original 72mm? Wondered if you may gain a small increase in torque?

 

[Jacobsen]

The wiring is plug and play as with other Bosch TB´s

The difference in radius is 3mm and with a length of 16mm it is quite shallow. 10.6 degrees.

 

[Bambi_]

How does she perform with new throttle body?

 

[aluzjunior]

can you make an kit lfor me? here in brazil we dont have Cayenne TB, neither a 3d printer

 

[Jacobsen]

How does she perform with new throttle body?

Very good. Cant tell you anything about hp or torque gains but is definately an improvement. I tried to describe it in my opening post.

 

[Jacobsen]

can you make an kit lfor me? here in brazil we dont have Cayenne TB, neither a 3d printer

Aluz - just search Ebay for 948 605 115 03
like this
http://www.ebay.co.uk/itm/03-04-05-...854727?hash=item51cb947387:g:MDAAAOSwLVZVs0W-

You should be able to find someone that will ship to you.

For the adapter you can order it from my shop on Sculpteo (an online 3D printing service that ships worlwide)
http://www.sculpteo.com/en/s/jacobsen/
Just order in plastic and a color if you prefer that.

Let me know if you need any help.

 

[Bambi_]

Very good. Cant tell you anything about hp or torque gains but is definately an improvement. I tried to describe it in my opening post.

Yes so you did. My mistake. I was drinking beer and not reading your post properly.:beer:

 

[mjaz101]

Hi this sounds great!
Would you recommend making this in aluminium?

 

[mjaz101]

Where did you get the silicon reduction elbow? I can't find any with id of 78mm!

 

[Jacobsen]

You could make it in any material you like. If you have a lathe aluminium would be fine. If not it will be a lot more expensive to have manufactured than 3D printed. A more basic round shape would also be preferable for lathe work.

The reduction is ID 90 to 76mm from ASH. 78 is ID of TB. OD is 89 afair. 76 ID fits over AFM
Auto Silicone Hoses - Silicone Polyester Reinforced Hose - 90 Degree Elbow Reducer - 90mm to 76mm - 15 Colours

 

[FAssarsson]

Did the same modification on my GT 3.2 last year and on the CF3 engine it did wonders for throttle response and feels better at mid/low revs.

Haven't tried it on a CF2 engine yet but my upcoming 3.0 build will have one. Nice to see more people enjoying the throttle response.

 

[tatolopez]

great improvement!
have u remapped after the modifications?

 

[Slicer]

Right now the price is too close to Autolussos aluminium F360 throttlebody's price.
I chose the "Polished alumide" adapter from You shop and price was 115 euros.
Autolussos full aluminium adapter price is 147 euros.
Right now I am not jumping on this, but great alternative.
Good work! :thumbup:

 

[sprint_veloce]

Polyamide, maybe? Also known as nylon.

 

[Jacobsen]

Right now the price is too close to Autolussos aluminium F360 throttlebody's price.
I chose the "Polished alumide" adapter from You shop and price was 115 euros.
Autolussos full aluminium adapter price is 147 euros.
Right now I am not jumping on this, but great alternative.
Good work! :thumbup:

I have nothing to do with the pricing from Sculpteo. I just made it public.
I produced mine in the white plastic (PA6 I believe) option for 67 euros. It does the job fine and it works out a lot cheaper than getting the F360 TB at a high price and adapter at 147 euros. My option is 117 euros total for TB and adapter.

 

[Jacobsen]

great improvement!
have u remapped after the modifications?

This mod requires no remap. ECU can easily make the adjustments.

The bottleneck in the intake is now the AFM diameter. If I get a bigger one a remap will certainly be neccessary.

 

[Slicer]

I have nothing to do with the pricing from Sculpteo. I just made it public.
I produced mine in the white plastic (PA6 I believe) option for 67 euros. It does the job fine and it works out a lot cheaper than getting the F360 TB at a high price and adapter at 147 euros. My option is 117 euros total for TB and adapter.

http://www.sculpteo.com/en/s/jacobsen/
Clearly it shows base price 96 euros! How did You get it with 67 euros?
Also add shipping.

 

[tatolopez]

This mod requires no remap. ECU can easily make the adjustments.

The bottleneck in the intake is now the AFM diameter. If I get a bigger one a remap will certainly be neccessary.

thank u for your answer.

when u started the engine cold, did u saw increase the rpm over the 3500?

I bought one yesterday ....

 

[Jacobsen]

When you choose the part there is an economy option with a bit longer lead time. This was 67 euros.

First start saw approx 1500 rpm (normally 1000 dropping too 700 for my car) Now it is normal again.