I'm not a expert so i need an opinion from the this group.
I have a 3.6 engine long block and a 3.3 965 engine complete.
I just responded to someone that wants a 1994 3.6 turbo engine.
I can verify the Fan assembly. Oil pump drive. Oil filter attachment.
Switch cams, Turbo oil pump feed line?
Timing chain covers... need oil temp sensor. what does 3.6 turbo do there?
I know the cylinders would need to be updated and heads switched to accept 3.3 intake blocks.
Not even sure this all bolts together. But I know My 3.6 engine needs head work and possibly updated cylinders.
Also looks like the 3.3 case is used.
So a 94 3.6 turbo engine is a 3.3 case and heads. The rest is 3.6 ?

Thoughts?

 

The 1994 3.6 turbo engine (M64.50) uses the same case (964.101.905.10 and 964.101.905.11) as the naturally aspirated cars (M64.01/.02/03).
Only the 3.3 cars (M30.69) use the 930 part number case.

Heads are unique for the 3.6 turbo (964.104.033.21) versus the 3.3 turbo (930.104.043.13) and the 3.6 naturally aspirated (964.104.033.04 / .06 / .08)
P&C are also unique for each.

 

I'm really trying to make it happen. Any good suggestions?

 

So I did a little more looking into this, and while the history is a bit vague, this is what I found.
The original RCT made from BTR 3.8 "spares" used the 3.6 with machined down pistons to decrease compression ratio.
They added a custom exhaust piece to connect the turbo and wastegate to the naturally aspirated 964 headers.
Turbo components were pretty 'stock,' a K7200 turbo and a stock 965 intercooler. Likely a 0.9 or 1 bar spring in the wastegate.
The AFM was swapped with a MAF and they made a custom chip for the motronic.
Heads, cylinders, intake, airbox, etc. were all kept stock, with the addition of some custom piping to bring air to/from the turbo and IC.
This motor was rated for 375hp.



The RCT Evo (which eventually replaced the BTR 3.8 as the top 964/965 package as the BTR moved on to 993 chassis cars) added new pistons, cylinders, cams, and heads.
I believe the rest is the same as above. This motor was/is good for 425hp.


So what does that mean for you?
I don't know! It's probably easiest to sell the 3.6 and spend that money to get 400ish HP out of the 3.3, but the NA -> Turbo conversion is cool.

 

Dave,
I agree 100%. The 3.6 back to stock is super easy. Keep that or sell it.
Thanks for all this helpful info.
RUF kept things conservative.
The 3.3 will be my focus. I never get too crazy.

 

I would agree sell the 3.6. Trying to swap parts from one to another would be more effort than it is worth. However, my car has just simple 1 bar spring, aftermarket exhaust, Billet BOV, and HF K27 and I am seeing 385 whp and more tq. So that isn't much different than the numbers claimed by ruf but i suspect he was conservative.

Happy Holidays

 

You could do the work to an N/A engine to turbo charge it. I did this with a 993 engine but it is nothing like the turbo engines. You would need new pistons to decrease compression. You can't machine N/A pistons to make them work. Although I went with 10.5:1 and am running low boost twin turbo. I would ditch the CIS and go ECU. The cost if I had to charge to build my engine would probably be close to 6 figures FYI. Although i have 2 boost settings at 390 rwhp and 460 rwhp we can achieve upwards of 650 rwhp if I decide to up the boost above .9 bar.

BTW those numbers are from my testing on the heartbreaking mustnag dyno. If this was a dyno jet I suspect people would be claiming 520 rwhp or more vs the 460. This IMO is more power than these cars need to be enjoyable.

 

I believe you have to buy a 3.6 long block
purchase low compression pistons.
Purchase a set of 3.3 heads.
purchase the entire CIS system
3.3 965 Fan housing holds the intercooler.
need a 3.3 clutch, sensor mount.
need the turbo oil pump.
need all the 3.3 sheet metal.
It’s a $50,000 parts build.

I was going to consider but Most would upgrade the rods, reinforce the block, etc.

Experts can chime in.

 

As @spartansix mentioned Looks like the heads are the Key ingredient. Need to adapt to the 3.6 cylinders and the 2 stud intake.
61R Case would be nice. 3.3 cam towers are used?

 

The 3.6 T used its own specific Cam tower or housing. It is similar to the N/A but since the car is single plug it is specific for that design. Not much in common between the 3.3 and 3.6. There is more in common with the 3.6N/A than with the 3.3. I am not sure why FVD shows different heads for the RS vs stock 3.6N/A AFAIK there is no difference.

@spartansix I just noticed you mentioned the AFM swapped out to MAF & motronic chip when the 3.3 and 3.6T's were both CIS.

 

Yes, on the early RCT. The RCT is a 3.6L turbocharged EFI engine, using most of the parts (including the block) from a 3.6 naturally aspirated engine.
My BTR 3.8 also uses an EFI setup taken from a 3.6 naturally aspirated engine, but built on the block and associated parts from a 3.6T engine bored out to 3.8L.

 

So similar to what I did with my twin turbo built off a 993 N/A engine. My friend just picked up a 79 BTR we plan to restore. He also has a very early slope nose I believe BTR and BTR2 After were done we should get the Ruf Cars together for a photo shoot.

Are you attending Parade?