1971 911T engine

totle · totle's Garage

Hi guys,

Just bought a 914/6 project.
Currently the engine sitting in the car is a 1971 911T 2.2 engine from a Sporto Coupe.
At least that is what I have found out from engine # (911/07 #6109506)

I do not know details about the engine yet, other than it was rebuilt 5000 miles ago (according to seller). It got then more aggressive cams, but not sure what kind of cams yet. Seller bought the engine from his boss who previously worked for Vasek Polak at Hermosa Beach, and did the rebuild.

Not too much familiar with this engine as I mostly have been working on 930 engines, both with Kjetronic and EFI.

What can you tell me about the this type of engine?

According to original spec i found that it has 125hp at 8500rpm.
Does this engines rev that high?

The Webers comes in parts, so need to put those together. All parts should be there including many new parts.
Does anyone have a good document describing the different parts for the Webers?

mossguy · 02-08-2013, 03:15 PM

My 1971 911T 2.2 came with Zenith carbs. I eventually replaced them with webers.

totle · totle's Garage

A picture light help ID them

Jonesy78 · 02-08-2013, 03:46 PM

Looks like Weber 40IDAs or one of the derivatives without seeing the numbers. Our host has a good book on these... LINK
Good luck with your new project.

mossguy · 02-08-2013, 04:19 PM

They certainly look like Webers! I'm not sure when Porsche went from Webers to Zeniths. It may have been during the '71 model year.

Jonesy78 · 02-08-2013, 04:38 PM

Also, Paul Abbott (who is a member here) has a parts diagram on his web site.

tijnes · 02-08-2013, 05:27 PM

PM me your email and I can forward the original Weber manual. I also have a 914/6 original case that I would be willing to sell if you're interested.

Martijn

totle · totle's Garage

Thanks for the manual Martijn

mcaterino · 02-10-2013, 07:35 AM

Quote:

What can you tell me about the this type of engine?

According to original spec i found that it has 125hp at 8500rpm.
Does this engines rev that high?

If the engine was rebuilt, and they took the time to upgrade cams, there's no telling what else might have been changed. Judging from rebuild projects you can find on this site, most people (like me) rebuilding a T engine will boost compression, swap crankshaft to get a longer stroke.. there's a whole slew of relatively straightforward upgrades that can be done, many which would work well in concert with a cam upgrade. So you could have anything.

In almost any case that engine shouldn't be spun to 8500. I think there was a number transposition there - the original spec is at 5800 rpm, not 8500. Redline would be around 6500.

Is the engine currently running?

Have fun with the project!
Mike

totle · totle's Garage

Hi Mike,
Guess you are right about the typo error.

Engine is not runnng, but mounted in the car.
To be able to get the correct spec I guess I will need to open it ut to find out.
At least to verify cams to me able to set the correct timing.

More here about the project
My first 914 - 914/6 GT project