Bench start a 3.2L motor

[ppetion]

I need to bench start my 3.2 L
I will setup a remote oil tank , fuel pump and tank . Does anyone have a diagram of the wiring as to what to how to power the computer , and coil and other necessary components?

My search here didn't come up with anything specific .

TIA

[Chuck.H]

I plan to do this also when I build my new motor in the next year or two... I'd have to check the wiring diagrams to be sure, but it seems to me that applying all the grounds and then powering the DME relay will do it all. Once the DME sees the engine spinning it will power up the fuel pump via the second stage of the DME relay... you could always power the fuel pump separately though for your test.

Do you have the wiring diagrams?
Where are you located?

Chuck.H
'89 TurboLookTarga, 419k miles

[boyt911sc]

Originally Posted by ppetion

I need to bench start my 3.2 L
I will setup a remote oil tank , fuel pump and tank . Does anyone have a diagram of the wiring as to what to how to power the computer , and coil and other necessary components?

My search here didn't come up with anything specific .

TIA

ppetion,

Read and review the wiring diagrams. They are available in Bentley Shop manuals, PSM, and PP electrical section. The easy way to do this project is to have a set of used engine wire harness, including the 14-pin connector, DME wire harness, engine bay fuse console, etc. I have an existing engine test stand that is almost 20 years old extensively used for my CIS engine start-ups and a new one being rebuilt at the moment for 3.2 Carrera Motronic engine start-up. I have posted the pictures of the old engine test stand in this forum. They are almost identical except for the ECU (for CIS) and DME (Motronic). The mechanical set-up would be the same.

Tony

[inaminit]

3.2 on a test stand

[EdRogers]

I'm pretty sure I have at least one used engine wiring harness, maybe two. A spare oil tank and everything but a stand and spare oil lines. Put new ones in my car(fuse your front blowers people!). If anyone is interested, I'm open to trades.

[Elombard]

I think Al Komsal on the board has a test stand he has posted pics of a few times. maybe Pm him for details.

[tperazzo]

Starter adapter ring pictured is from Engine Test Stand for Air-cooled Porsche and VW

Good for cranking the engine over on a test stand.

[ppetion]

Thanks for all the replies
I already have a stand , harness , DME.
The plan is to plug the harness from DME to motor .i know that will take care of injectors , and fuel pump . I just need to know how to power the DME using a toggle switch and a push button switch for the starter . What wire to use, everything else is covered .

The tramsmission is attached to the motor, no need for a starter adapter.

[dad911]

This should help: Pzary3233's 78 SC 3.2 Swap Project

[ppetion]

Originally Posted by dad911

This should help: Pzary3233's 78 SC 3.2 Swap Project

Thanks . Exatly what I was looking for .

Cheers !

[dad911]

Do us a favor, post back the minimum wires and details you needed to connect. It will help me, I'm planning on putting a 3.2 in a '73 in the near future.

[ChrisBennet]

What is the attraction to making an engine test stand? Is it a way to extend the engine building experience? It's pretty easy to pop a 911 motor into a 911 - you could do it multiple times in the time it would take to build an engine stand, not to mention the cost savings.

I could see the attraction of having an engine dyno but an engine test stand seems like a lot of work to go to just to avoid putting the motor in a car.

[boyt911sc]

Originally Posted by ChrisBennet

What is the attraction to making an engine test stand? Is it a way to extend the engine building experience? It's pretty easy to pop a 911 motor into a 911 - you could do it multiple times in the time it would take to build an engine stand, not to mention the cost savings.

I could see the attraction of having an engine dyno but an engine test stand seems like a lot of work to go to just to avoid putting the motor in a car.

Chris,

Why do you need an engine stand or a yoke to rebuild a 911 motor? People in the past rebuilt motors sitting on a work table or pallet. An engine test stand is another tool that makes your life a lot easier in engine troubleshooting and start ups. A good example is a CIS engine that you have rebuilt and ready for installation in the car. What happens if the engine fails to start or run at all? How do you check the CSV or the FV, or you have a vacuum leak some where? How would you replace the air box? Fuel leaking at the backside?

If you are rebuilding a 911 engine once in a decade you probably don't need one. In my case, I prefer to work on a 911 engine installed on an engine test stand than installed in the car. The convenience and comfort of doing the job sitting on your work chair on caster wheels is priceless. It is not how hard you work but how smart you tackle the job.

An engine test stand is not for everyone. Some people like to do it the hardway and others a different way. Some people like to drop the engine using floor jacks and some use a lift. I never understood before why people spent money on hydraulic lift until I got one for myself.

Tony

[ppetion]

Update ,
I was able to bench start the motor , I will post an update of the wires needed to start it .
The motor started and idles but will not rev .

There is no MAF connected since I obtained the motor without it .

Is that normal?

[49willard]

I made/modified a similar engine stand for a current project, an M vs a P car. A much simpler task. The original stand was built for a 1910 large 4 cylinder Buick!

[Chuck.H]

Originally Posted by ppetion

Update ,
I was able to bench start the motor , I will post an update of the wires needed to start it .
The motor started and idles but will not rev .

There is no MAF connected since I obtained the motor without it .

Is that normal?

The 3.2's do not have a MAF in the true sense of the well, sensor. From your picture I see the aluminum 'barn door' air flow sensor in place, perhaps you're referring to some other sensor?

Chuck.H
'89 TurboLookTarga, 420k miles

[ppetion]

Originally Posted by Chuck.H

The 3.2's do not have a MAF in the true sense of the well, sensor. From your picture I see the aluminum 'barn door' air flow sensor in place, perhaps you're referring to some other sensor?

Chuck.H
'89 TurboLookTarga, 420k miles

Chuck , the picture on the thread is not my setup . Another member posted it for reference.

Her is a picture of mine .

[tholyoak]

Originally Posted by ppetion

Update ,
I was able to bench start the motor , I will post an update of the wires needed to start it .
The motor started and idles but will not rev .

There is no MAF connected since I obtained the motor without it .

Is that normal?

Yes.

[Thomas Owen]

Here is what I did for my 3.6 and it works perfectly. As mentioned above, if you can get the harness out to the ECU that will be the best.
I used an oil tank from a '70, and a aluminum fuel tank purchased off eBay from Bam manufacturing - bam-manufacturing | eBay

Also used the 'Starter ring test adapter' and after beefing it up a bit it has worked well for $109 - TheSamba.com :: VW Classifieds - Porsche 911 Starter Adapter for Engine Test Stand

Here is the stand and engine running:
https://www.youtube.com/watch?v=aKsNcOOzRf8

[boyt911sc]

Thomas,

From what year is the 3.6 engine? From a 964? I was told that the early 993 (OBDI) and later 993 (OBDII) are more challenging than the 964 engines to start in an engine test stand like yours. Could you share your thoughts? Thanks.

Tony