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-   -   Weber conversion Carrera 3.0 (http://forums.pelicanparts.com/porsche-911-technical-forum/957341-weber-conversion-carrera-3-0-a.html)

range83 05-20-2017 09:52 AM

Weber conversion Carrera 3.0
 
Hello
I would like to switch to a CIS system with the WEBER 40 IDA 3C.
What can I put on as an intake manifolds. The engine is a carrera 3.0
Does PMO manufactures an intake manifolds?
thank you in advance

Joe Bob 05-20-2017 10:23 AM

Most used Webers are used up. PMO makes a great product and will supply everything you need with a better carb than the original. Pricey but worth it.

If I remember he only deals with the initial order via fax. After you buy he does talk on the phone or via email.

Good luck.....BTW, switching to carbs is best if you upgrade the cams and tweak the ignition. Stock FI cams on the 3.0 aren't the best with carbs for performance and/or mileage per gallon.

wayner 05-20-2017 11:31 AM

Yes

Even with webers use the pmo intakes

They are engineered to block off the cis ports

range83 05-20-2017 11:39 AM

Thank you for your reply
I know that PMO carburetors are very good but I already have the weber in very good condition.

wayner 05-20-2017 02:29 PM

Also, when you order your PMO manifolds for your weber carbs also order the spacers(or insulators) or whatever he calls them

Note that the factory manifolds won't work

911 SLANT 05-20-2017 02:48 PM

Do you have to run insulators? My mechanic put the tall PMO manifolds on my 2.7 spec. Motor but did not install insulators.

banda 05-20-2017 02:49 PM

I have this set up on my 3.0 big port motor. I used the 46MM PMO tall intakes with weber 40's and it works great. Excellent low end throttle response. I also have Web Cams with SSI's and it feels stronger than my 3.2 motronic motor.

Best of luck

Bob

zedsn 05-20-2017 02:51 PM

No you don't have to run the insulators but they are a good idea as they are a heat barrier.

911 SLANT 05-20-2017 03:20 PM

I would have to put new studs. I don't think mine are long enough for insulators.

ginot912 05-20-2017 03:47 PM

I heard fuel boiling in my webers before I put insulators in.
Longer studs came with the kit, if I remember correctly.

Jack Stands 05-21-2017 06:38 AM

On my 2.7, I used the PMO kit and did use the insulators. Then I installed a switch that allows me to turn off the fuel pump before parking the car. That allows the fuel in the float bowls to drop to a lower level and helps with the hot fuel percolating. Especially with today's ethanol laced fuels, it helps cut down on the fuel boiling out of the vent tubes.

juanbenae 05-21-2017 09:58 AM

Quote:

Originally Posted by banda (Post 9594912)
I have this set up on my 3.0 big port motor. I used the 46MM PMO tall intakes with weber 40's and it works great. Excellent low end throttle response. I also have Web Cams with SSI's and it feels stronger than my 3.2 motronic motor.

Best of luck

Bob

what webcam grind did you use? I have used the 120/104 grind and have a had terrible time getting off a rich at idle and highway cruzing speeds AF.

range83 05-28-2017 01:47 PM

Thanks for all your answers
Someone has already ordered from PMO, could you please explain how did you proceed ?
Thank you

Bill Douglas 05-28-2017 02:09 PM

It seems a shame to mess with such a beautiful engine as a Carrera 3.0.

timmy2 05-28-2017 02:42 PM

From what I've read, PMO only accepts orders and questions via fax machine.
Fill out the ordering information and ask any questions. He will get back to you.

range83 05-29-2017 02:27 PM

Quote:

Originally Posted by Bill Douglas (Post 9604779)
It seems a shame to mess with such a beautiful engine as a Carrera 3.0.

I known kjet injection isn't the best one but it s possible to change when ever i want to the original configuration. I just want to try it

range83 05-29-2017 02:30 PM

Quote:

Originally Posted by timmy2 (Post 9604810)
From what I've read, PMO only accepts orders and questions via fax machine.
Fill out the ordering information and ask any questions. He will get back to you.

There's only one problem for me.... to found a fax :)
It's a joke.... i suppose I can send faxes with internet...

timmy2 05-29-2017 03:00 PM

Quote:

Originally Posted by range83 (Post 9605801)
There's only one problem for me.... to found a fax :)
It's a joke.... i suppose I can send faxes with internet...

Old school, but keeps one from answering emails all day long...
Lots of free apps out there that will send a fax from your smart phone.

Victory1 05-29-2017 03:01 PM

pics please when done

CBRacerX 05-30-2017 04:58 AM

https://uploads.tapatalk-cdn.com/201...ddf668bf07.jpg

You want to end up with something like this. XDi ignition not required :)


Sent from my iPad using Tapatalk Pro

littleoldman 05-30-2017 03:30 PM

http://forums.pelicanparts.com/uploa...1496183370.JPG

We put webers on my 3 liter and it's amazingly flexible. Great low end and its rev happy. Best of both worlds.

No issues.

juanbenae 05-30-2017 04:40 PM

Quote:

Originally Posted by Bill Douglas (Post 9604779)
It seems a shame to mess with such a beautiful engine as a Carrera 3.0.

if a true 3.ol Carrera being such a rare bird I would seriously consider saving the CIS & wiring harness so if you ever needed to go back it's all intact. get timmy2 to build you a more carb thinned harness and mothball all of the takes offs... speaking of ignition, I'm not sure about the Carrera 3.o, but the two early, big port motors ive gone to carbs on the OE CDI & coil were upgraded for carb voltage.

alright! it looks pretty, but still trying to get it jetted correctly. current project 3.ol





http://forums.pelicanparts.com/uploa...1496187623.jpg

CBRacerX 05-30-2017 04:55 PM

Weber conversion Carrera 3.0
 
Mine are 46's and will be for sale soon (Going to EFI since I love projects).

nathanbs 05-30-2017 07:51 PM

Any of you guys want to share your carrera 3.0 engine serial numbers and possibly sell your motors?


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