3.6 conversion question

[speedman]

how much of a different will I see if I convert my 79SC to a 3.6 varoram motor. I have been debating whether to install a 3.6 or buy a new car with more power.

[flskala]

HP increase ~ +100 and several thousand $$$ likely missing from your wallet.

[Deadeye]

Dramatic difference in power and torque. If you sell the motor you have it will help defray the cost. No regrets here.

[safe]

Its really fun to have an older car with more than stock HP.
My 77 targa has almost 100 hp more than stock and power to weight ratio thats close to waterpumpers.

I do a lot of track days with other Porsches and its so satisfying to hunt 996/997 cars, even GT3s if the driver is bad. Usually they are surprised when they can't shake you even on the straights!

[wildcat077]

All of the above
Not to mention,no more valve adjustments ...

Cheers
Phil

[aston@ultrasw.c]

If you go with an air-cooled 3.6 993 motor you are getting one of the strongest, most reliable motors Porsche ever made.

If however, you find a newer 996/997/cayman you will end up with an M96/97 motor that has had a boat load of problems.

[jamesjedi]

It is very expensive. I am doing it now. There are expenive parts other than the motor....I just spent $2000+ at Patrick Motorsports. And that is with my having the engine tin and some other parts.

Also, I wanted a brake upgrade to match the engine...another $2000.

However, for me to get my 3.0 engine rebuilt it would have been at least the cost of my 964 engine.

[bike2ride95]

Spend it wisely...I'd redo the engine. Its more fun to put more HP on an old car
instead of buying one with a bigger engine, it gives the ole' car...balls

[hightuned]

A thought on the matter, does all aircooled 911 engines 65-98 fit any bellhousing of the 901/915/930/g50 ofc disregaring the cluch. The reason i asked is that im keeping one eye open for a 3,2/3,6 at the same time im rebuildning my old engine. I have a 3,6 rs single mass flywheel collincting dust on a shelft, just for fun i tried to mate it to my 2,7 and it will hardly even clear the flange for the bellhousing(theeth for the cranktrigger sticks out but the bolt patter for the springplate looks the same) so im wondering if i can mate a 3,6 to a 915 transmission?

[Sboxin]

.
.
.
BIG difference -- more HP and more importantly lots more Torque

BUT, you need more oil cooling and a very sturdy (meaning rebuilt strong) transmission
- We used CMS for our 915 rebuild after breaking a pinion tooth and they added some
stronger parts.

Yes, 3.6 bolts up to 915 - but need a Patrick flywheel

Regards,

[safe]

Yes, if you have the right flywheel. Depending on combination you may need a special flywheel such as 3.6->915.

But it's not advisable to mate a 3.2 or bigger to a 901.

[hightuned]

Anyone got a max tourge figure for the 915? Made a iquiry at renaged and the clamed running 400hp smallblock on. 915 was no problem, of thats true its should be able to handle like 550Nm for normal aplications?

[aston@ultrasw.c]

Originally Posted by hightuned

Anyone got a max tourge figure for the 915? Made a iquiry at renaged and the clamed running 400hp smallblock on. 915 was no problem, of thats true its should be able to handle like 550Nm for normal aplications?

It's no problem right up to the point when it grenades.

[safe]

Originally Posted by hightuned

Anyone got a max tourge figure for the 915? Made a iquiry at renaged and the clamed running 400hp smallblock on. 915 was no problem, of thats true its should be able to handle like 550Nm for normal aplications?

I would say 300Nm in the long run if you don't abuse it to much. If you add parts that hold it together it can take more torque or abuse.

[JeremyD]

Originally Posted by hightuned

so im wondering if i can mate a 3,6 to a 915 transmission?

Yes - Patrick Motorsports makes a flywheel
Patrick Motorsports | Porsche & Mid Engine Conversions

good info here too: InstantG's Home Page

3.6 in an earlier car makes for a fun package!

[umgang]

Do it. You will have no regrets and it will be hard to drive the car while laughing so hard.
I have a 1975 911S w/ M64 3.6 Metzger engine. Owned it 8 years and still cannot sleep the night before i am going to drive it- it is that cool.
As far as differences between old and new: if you enjoy the process of the build, mechanicals of a true race engine with heritage, and a more convulsive experience go with the 3.6 in the SC.
If you are more new technology, gadget, less driver input, go with the Subaru motor cars (newer).

As far as the 915 trans- i have a magnesium cased 915 in mine.
It has run 200+ track days, 35+ GTS class races in NASA and PCA Club Racing.
I have a Setrab cooler with a Tilton pump that has helped keep the tranny cool.
But i will say, for DE/ TT/ you will be ok; for racing, i have had two failures / rebuilds of the 915 trans. It is a lot of torque for a weary mag cased box!

[hightuned]

Thx guys, love the look of you car Jeremy i think om going to get a rsr spolier and loose the 930 wing before i repaint my car! Having a real hard time making my mind up whether i should get a 3,6 or go through with the supercharger conversion? Im sitting here stairing at a Vortech V5, im a desgin egineer by profession so i have designed pullys, mounts and beltdrive to mount it to Porsche engine. Just cant make up my mind if a 3,6 is more bang for the buck?

[speedman]

I think I will be doing the swap. I would like to end up with 300 rwhp at some point in the future.

[uwanna]

Originally Posted by hightuned

A thought on the matter, does all aircooled 911 engines 65-98 fit any bellhousing of the 901/915/930/g50 ofc disregaring the cluch. The reason i asked is that im keeping one eye open for a 3,2/3,6 at the same time im rebuildning my old engine. I have a 3,6 rs single mass flywheel collincting dust on a shelft, just for fun i tried to mate it to my 2,7 and it will hardly even clear the flange for the bellhousing(theeth for the cranktrigger sticks out but the bolt patter for the springplate looks the same) so im wondering if i can mate a 3,6 to a 915 transmission?

Hang on to that 3.6 single mass flywheel. I did my 3.6 swap into my '80SC way back in '92. Back then there weren't any fancy swap kits or conversion parts. Had to figure out
the wiring etc. I thought I was stumped when I tried to figure out how to hook up to a
915. The motor came with a single mass flywheel ('89 C4 only). My solution was to use the 3.6 flywheel and have a machine shop redrill and thread it to take a 915 pressure plate.
Twenty one years later, and the old girl still runs like a raped ape! So really, Patrick doesn't
have a monopoly on conversion flywheels. You could convert yours!

[mreid]

Here's my 95 3.6 bolted to a built 915 that used to live behind Spuggy's turbo engine.