3.6 into a 74 chassis mods required

[mreid]

Anyone know exactly what mods are required to the 3.6 engine tin in order to install it into an earlier chassis. The 3.6 is from a 92 911. Thanks.

[tdskip]

Early bump / subscribe

[pors1968]

I did it in my 69 3.6 fuel pump flywheel to macth your 915 front cooler whith fan electric wiring of dme .Whith your 3.6 you need all electrical engine dme .

[rkeele]

the rear most sheet metal piece needs to be cut and reshaped sent mine to instant-G also send your rear engine mount for the 3.6 it needs to be braced for strength.

[wildcat077]

Mark,

You're better off buying a used set of 3.2 tin and making it fit the 3.6 engine rather than trying to modify the 3.6 parts.I installed a 3.6 in my 89 a few months ago and found it easier and cleaner with the 3.2 tin.
Mind you,it was a time consuming affair and i can understand why Patrick Motorsports charges $1200.00 for the conversion tin ...

Cheers
Phil

[BoxsterGT]

I am curious as to what you did for an oil cooler? Did you add a cooler at the engine with revised ducting? Or did you run a front fender or center cooler? Or both?

Len

[JeremyD]

fuel lines, move the fuel pump, mine required oil lines and cooler. Conversion harness, you need to convert to a single pulley fan - sheet metal, etc

http://www.patrickmotorsports.com/package/engine-conversion-36l-porsche-911-chassis/

Instant-G 3.6 Liter Conversions

964 3.6l conversion 911sc

[arrivederci]

See Jeremy's links...this has been done many times. Aside from what is covered above, you need to adapt the wiring harness (or use one that us available from a supplier above), throttle linkage modified, power steering block off, oil line modifications, and possibly do something with the exhaust / muffler.

[0396]

Great info. Thanks-

[BoxsterGT]

I am starting a fuel line set for a customer with a 993 motor going into a 72 chassis. Very similar to what you are doing or have done.

The 72 Fuel Tank is the same as the 74. Porsche changed the layout in late 75 in preparation for the front fuel pump.

However, my real concern is the fact you have a 74, the only year Porsche installed the white Nylon fuel lines through the Tunnel. Hopefully you have replaced them.

If not, be prepared for doing that as part of the upgrade to your new motor.

Email me if you would like further information on this or do a search on 1974 911 Fuel Lines. I should have spoken up at my previous post but did not think about the 74 fuel line issue, had the engine tin & Oil Lines on my mind.

Len

[tdskip]

Bring us to school on the fuel line topic Len (please)

[JeremyD]

from my car build thread...

Originally Posted by JeremyD

Work has finally slowed to 10 hour days instead of 14 hour ones - so I have been able to make some progress.

Got Monoballs installed last night on the rear trailing arms. Got old fuel lines out...

They were not too bad looking - but really only had push on fittings and hose clamps. Not ideal for a car that spends a good amount of time on the track...

I used smooth bore SS lines - but only because Len didn't supply the thru tunnel lines at that time.

Originally Posted by JeremyD

One is in - this is how the line looks going in




pain in the neck - but probably the best alternative to the nylon lines that were in there. I also put some regular fuel line over to make sure there was no rattling (although I can not imagine - they are a snug fit.


The flaring tool is - Ridgid 83037 45° SAE Ratcheting Flare Tool for 1/8 - 3/4" Tubing (458R)

You have to get this model to flare SS lines -

Still I feel pretty safe with the stainless steel rigid lines


The nylon lines for 74 - with the push on fittings blow - not safe and with ethanol in gas they are even worse.

Lines are from McMaster Carr -
2 Each 89895K27 Type 304 SS Smooth-Bore Seamless Tubing 3/8" OD, .305" ID, .035" Wall, 6'Length

Len Cumming supplied the M16 x 1.5 fittings for 3/8" pipe. Many use 3/8 and 5/16 for the return. I elected to use the same size for both.

[BoxsterGT]

Jeremy said it all. The 74 tunnel lines start out white but turn brown and hard and become brittle. When disturbed they crack and break. NOT GOOD for fuel lines.

In 75 Porsche went to the black Polyamid, and have used this ever since. Its practically bulletproof. In fact most auto mfgs worldwide now use some form of this tube.

However, having seamless SS hardlines thru the tunnel is probably the best when it comes to peace of mind.

For installation of a 3.6, the question is with the fuel line routing & choice of Metric or AN adapters to the motor.

Len

[arrivederci]

Originally Posted by BoxsterGT

I am starting a fuel line set for a customer with a 993 motor going into a 72 chassis. Very similar to what you are doing or have done.

The 72 Fuel Tank is the same as the 74. Porsche changed the layout in late 75 in preparation for the front fuel pump.

However, my real concern is the fact you have a 74, the only year Porsche installed the white Nylon fuel lines through the Tunnel. Hopefully you have replaced them.

If not, be prepared for doing that as part of the upgrade to your new motor.

Email me if you would like further information on this or do a search on 1974 911 Fuel Lines. I should have spoken up at my previous post but did not think about the 74 fuel line issue, had the engine tin & Oil Lines on my mind.

Len

My car is the 993 motor into '72 chassis. The build thread is linked below and I will be documenting the fuel line setup. Also, I am not using my '72 fuel tank - have a newer, larger SC style tank and have moved the fuel pump to the front location.

72 Rust Repair - long overdue update