Would You Start With a 3.0, 3.2 or 3.6?

[jamesjedi]

I found an engine. I need to know if someone would pay $3000 for it??? I am going to let the seller know today. THANKS!!! It is a 3.3 tubo engine, that I would covert to an NA. It has following, and work has been done professionally;

Perfect Case, rebuilt and resealed

Micro-polished crank with standard size main and rod journals

New main bearings

New rod bearings

New intermediate shaft bearings

Oil pump

New chains

New rails

New rod nuts and bolts

6 bare cylinder heads (not installed on engine)

Chain housings (not installed on engine)

Chain covers powder coated yellow (not installed on engine)

Upper valve covers powder coated yellow (not installed on engine)

Lower valve covers modified for twin plug, also yellow (not installed on engine)

Fan housing

Alternator

Fan

12 rocker shafts

12 rockers

Both cams in perfect condition

Cam housings (towers)

Factory top fiberglass air shroud



Not included:

Sheet metal air shrouds

Pistons and cylinders

Exhaust

Turbocharger

Intercooler

Intake system

Engine harness, etc.


Advice would be great!!

[Steve@Rennsport]

Find out WHO rebuilt it.

Might be a bargain and might be a nightmare.

[jamesjedi]

Thanks for replying Steve. It was built by Al Bro#df##t. It is a 3.3, I will correct the original post. I erroneously assumed that the 91 Turbo was a 3.6, they were 3.3. That means that this engine can only be bumped up to 3.4 without splitting the case?? Or, without using thin walled cylinders.

[Steve@Rennsport]

Originally Posted by jamesjedi

That means that this engine can only be bumped up to 3.4 without splitting the case?? Or, without using thin walled cylinders.

You can make it a 3.4 without doing any machine work. Anything larger will require case modifications or thin-walled cylinders.

[jamesjedi]

3.4 on 93 octane would be good for 250, in an unstressed engine??? I am really starting to like the 3.6.

[lindy 911]

I built a 3.0 that had Mahle cylinders. It went like this:

Stock crank checked and polished.
Stock rods re-bushed and re-sized, balanced.
Stock SC oil pump.
Raceware rod bolts.
Supertec studs
Rebuilt '78 SC heads with race springs and retainers.
JE 10.5:1 pistons.
46 Webers.
Equal length headers no heat.
GE60 cams.
At this point I spent about $7500
Rennwerks twin plug distributor.
MSD 6AL with twin coils.
This set-up cost about $2,000

No dyno time yet but experts in the know say 275 hp at the crank. The seat of my pants say see'ya 350Z. This combination runs REALLY hard. It's a little pipey but I like that.



Lindy

[jamesjedi]

Can the case be rebored without splitting it?

[lindy 911]

No

[AlfonsoR]

Originally Posted by Steve@Rennsport

You can make it a 3.4 without doing any machine work. Anything larger will require case modifications or thin-walled cylinders.

Steve, what are is the real world down side of thin wall cylinders? Logic says a thinner wall will be less geometrically stable, leading to less longevity or at least more blow-by at higher temperature. What have you seen?

[jamesjedi]

Lindy, that is a nice build for $7500. I am also curious about these thin wall cylinders. I think that they are called "slip on"? Perhaps is it a predictable answer.

[Steve@Rennsport]

Originally Posted by AlfonsoR

Steve, what are is the real world down side of thin wall cylinders? Logic says a thinner wall will be less geometrically stable, leading to less longevity or at least more blow-by at higher temperature. What have you seen?

Thin-walled cylinders oftentimes lose concentricity due to normal heat cycling and that leads to loss of effective ring sealing. This increases blowby and oil dilution.

We are quite careful about what cylinders (and sizes) we will use or sell anymore.

[jamesjedi]

A BIG thanks to Steve for his contributions to this thread. THANKS.