I’ve loved your videos and am really happy you are doing some content on Webers. I just picked up a set of 40 IDAs yesterday for my 911sc and then are going to need some work.
what a fantastically informative video. I think it would take forever to establish and understand these differences from web research alone I dont think anywhere else has all of this info in one place. Love the channel
The original vent size on an IDA was 37mm. The idle jet holders are available in .60, 1.00, and 1.20 I believe. JayCee and others offer really nice hex main jet holders, and allen head idle jet holders. Good Video buddy! Keep it up.
never seen a 37 mm choke? do you mean 27 mm that the 1969-70 911T? Or are you talking about some other non Porsche application? not sure what you mean on the Idle jet holder sizes? do you mean the jets themselves? in which case the sizing on them starts at 0.30 and goes up from there. Thanks Kurt
In the USA the 1971 911T was the last model that was fitted with Carburetors. In Europe some early 1972 911T models were fitted with Zenith 40 TIN carburetors. Though carburetors can be used with turbo charged engines it is not practical too do so on the 930 engine. Kurt
Most likely a very late production in Italy before they ceased production in Italy. Would still be considered an aftermarket or replacement set and not something that would not have been originally installed on a Porsche
@@klassikats That is possible, the Porsche is a 1970 model (originally Zenith carburetors I think) the Webers do have the bronze fittings for example instead of the aluminum ones in the model of your video. I hope the Italians kept the same quality standards!? :)
Great details on the Webbers, very informative. Can you express an opinion on PMO's? Are they as good as Webbers? This would be for a non-race 2.7 that is currently CIS, will be used for track days and general enjoyment. TIA
On a 2.7L engine, PMO carburetors will work just fine. Where they run into issues is on the smaller 2.0L, 2.2L, and 2.4L engines. This is because PMO uses a 50 mm upper body and then necks down to a 40 mm throttle plate. This creates some weird airflow characteristics in the carburetor body, which can result in drivability issues. Personally, if it were me, I would stick with your CIS fuel system. There is no performance gain by going to carburetors; if anything, considerably more maintenance is required using carburetors. Kurt
Hello @saileshis11, the PMO carburetor is based on a larger body than the Weber 40, as you can get PMO's in 40, 46, and 50mm. The body comes in the 50mm size and is choked down to 40 and 46. This makes for more airflow. This is great for a larger engine but not so great for 2-liter engines. A lot of PMO's end up on modified cars with larger displacements. Thanks for watching, S
Great content!!
I learned more from this video, than I learned in 5 years of experience.
Glad you enjoyed it!
Kurt
I’ve loved your videos and am really happy you are doing some content on Webers. I just picked up a set of 40 IDAs yesterday for my 911sc and then are going to need some work.
Glad you like them!
thanks
Kurt
what a fantastically informative video. I think it would take forever to establish and understand these differences from web research alone I dont think anywhere else has all of this info in one place. Love the channel
Glad you enjoyed it! and thanks for your support
Kurt
So very much to learn about my '71T and happy to get the knowledge I need from your channel! Thank you!
Glad to help!
Kurt
Great video, perfect video for a carb nerd like me!
Glad it was helpful!
Kurt
Very detailed explanation, much appreciated.
You are welcome!
Kurt
The original vent size on an IDA was 37mm. The idle jet holders are available in .60, 1.00, and 1.20 I believe. JayCee and others offer really nice hex main jet holders, and allen head idle jet holders. Good Video buddy! Keep it up.
never seen a 37 mm choke? do you mean 27 mm that the 1969-70 911T? Or are you talking about some other non Porsche application? not sure what you mean on the Idle jet holder sizes? do you mean the jets themselves? in which case the sizing on them starts at 0.30 and goes up from there.
Thanks
Kurt
Kurt
Fantastic video and really informative! Thanks for sharing your expertise !!
My pleasure!
Thanks Doc, can't wait
thanks
👍 Hi Kurt,
what was the last model Porsche had carburettors from factory?
Can you put Weber's on a turbo 930?
Thanks,
Rich
In the USA the 1971 911T was the last model that was fitted with Carburetors. In Europe some early 1972 911T models were fitted with Zenith 40 TIN carburetors. Though carburetors can be used with turbo charged engines it is not practical too do so on the 930 engine.
Kurt
Strange, my carbs have the look of the 80's model with the idle progression passageways but with the original Made in Italy stamp?
Most likely a very late production in Italy before they ceased production in Italy. Would still be considered an aftermarket or replacement set and not something that would not have been originally installed on a Porsche
@@klassikats That is possible, the Porsche is a 1970 model (originally Zenith carburetors I think) the Webers do have the bronze fittings for example instead of the aluminum ones in the model of your video.
I hope the Italians kept the same quality standards!? :)
Great details on the Webbers, very informative. Can you express an opinion on PMO's? Are they as good as Webbers? This would be for a non-race 2.7 that is currently CIS, will be used for track days and general enjoyment. TIA
On a 2.7L engine, PMO carburetors will work just fine. Where they run into issues is on the smaller 2.0L, 2.2L, and 2.4L engines. This is because PMO uses a 50 mm upper body and then necks down to a 40 mm throttle plate. This creates some weird airflow characteristics in the carburetor body, which can result in drivability issues. Personally, if it were me, I would stick with your CIS fuel system. There is no performance gain by going to carburetors; if anything, considerably more maintenance is required using carburetors.
Kurt
Do you have any info on Weber vs PMO carburetors?
Hello @saileshis11, the PMO carburetor is based on a larger body than the Weber 40, as you can get PMO's in 40, 46, and 50mm. The body comes in the 50mm size and is choked down to 40 and 46. This makes for more airflow. This is great for a larger engine but not so great for 2-liter engines. A lot of PMO's end up on modified cars with larger displacements. Thanks for watching, S