993 longblock with PMO or other carbs

964polar · 07-13-2005, 03:20 AM

Assume I would find a really good longblock for 1800 euros (2200 $) and then be prepared to spend money on new PMOs or other carbs. How would this work for a transplant in my -72 T 911 with a restored 915 tranny.

-Additional modifications?, engine mounts, transmission changes
-Additional parts I have to consider?

What about the end result?

The car would be used mainly for weekend driving.

Originally I planned this for a 3.0 SC engine but now I am working in Italy and found this longblock with 80000km.

Thankful for any input

Cheers

Henrik (swedish 911 owner currently in Italy)

Cookie Porsche · 07-13-2005, 07:42 AM

Last one first. The PMO50's on a 993 is great fun. Would be a real "modified" red Fiat killer.

The 915 will handle the power if you are smooth.

You must fit a SC or Carrera flywheel & clutch setup to the 993.

Use the 993 engine mounting bracket, it should fit straight in. G/box mounts remain. Clutch and Throttle remain too.

All that's required is new fuel and ignition plumbing - quite easy.

Are you planning on modifying the engine?

Enjoy. Tom

Jeff Alton · 07-13-2005, 08:59 AM

Love the "red fiat" quote!

Jeff

rick conrath · 07-13-2005, 10:44 AM

You might be able to find a longblock in that price range where you are located. In the states......they are closer to $3,500 US.
Rick
'78 930

Wrecked944 · 07-19-2005, 02:15 PM

Are PMO's on a 933 really a good idea? Isn't the porsche varioram induction system and EFI superior to carbs?

ttweed · ttweed's Garage

Quote:

Originally posted by JanusCole
Are PMO's on a 933 really a good idea? Isn't the porsche varioram induction system and EFI superior to carbs?

Depends on what you think is superior. As far as efficiency and perhaps driveability, yes, the EFI is superior. Better gas mileage and emissions for sure. For raw power, though, Bruce Anderson talks about a simple 964 engine that Jerry Woods built using a stock longblock with special cams that required no additional valve clearance, Weber 46s and a Pete Weber exhaust that made about 320 HP on the dyno easily and cheaply. That sounds better than any stock 993 engine that I've heard of, and would have better throttle response. It took until the 997 and water cooled, 4-valve heads for the factory to get that kind of output on their stock motors. I'd budget an extra $1000 or so for some of those cams from JWE.

One thing to keep in mind is that additional oil cooling will be necessary. The 3.6 does not have the engine mounted cooler of the earlier engines. This can add considerable expense to the project, especially if your early car does not have any front cooler at all. This could run you another $1500 or so.

I believe the stock dual distributor can be used to trigger the ignition, but you would need a programmable advance curve, since the DME usually does that for the 993. MSD makes suitable products for this. Not too expensive from Summit Racing. I think it would be a great motor for an early car. I considered it myself when I blew the 3.0 in my '73, but found a used 3.4 locally before pursuing it.

I'd want to beef up the 915 too and add some tranny cooling. Another kaa-ching, but do-able. If you're going to spin it to 7,000 RPM a lot, I'd replace the rod bolts with ARP or Raceware.

TT

Steve@Rennsport · 07-19-2005, 04:58 PM

Great advice from Mr. Tweed,....

I'd simply add that the 3.6 distributor has no trigger in it,...it simply "distributes".

That said, its possible to add a trigger to it and make it adjustable so you can adjust timing.

A PMO'ed 3.6 becomes a "weapon" and the throttle response belies the HP increase.

As Tom mentioned, there are internal changes one should make for durability for track use; rod bolts, valve springs, retainers usually does it.

elijah · 11-23-2010, 08:30 PM

Quote:

Originally Posted by 964polar

Assume I would find a really good engine long block for 1800 euros (2200 $) and then be prepared to spend money on new PMOs or other carbs. How would this work for a transplant in my -72 T 911 with a restored 915 tranny.

-Additional modifications?, engine mounts, transmission changes
-Additional parts I have to consider?

What about the end result?

The car would be used mainly for weekend driving.

Originally I planned this for a 3.0 SC engine but now I am working in Italy and found this longblock with 80000km.

Thankful for any input

Cheers

Henrik (swedish 911 owner currently in Italy)

Hi there! Is there any update about this post? I'm just wondering where did you able to buy that engine long block because I'm also looking too within that price range. Is there any store you could suggest? I'll appreciate any other ideas where to buy a cheap long block.