geolab

This was due for some time now, better late than never.
No book writer or whatever is more passionate for the 993, than a whole bunch of members here.
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JPP

Hi George ..
So, this is showing the hp/torque increase you could expect on the non-varioram engine, right? Is it the same amount of horsepower increase for Varioram engines .. meaning approximately +10?

geolab

On paper it is +15 either, yes

cabrio993

Geo, Thnks for posting it. What are "TU's" on the last page? Tributary Units? How does it relates to time? Interesting to see what amount of labor Porsche estimated for this.

geolab

Time Units , internationally, each 1 hour is equal to 100 Time Units.
The TU's is for dealer to factory job clearing and billing, between each other

cabrio993

Thanks George. That makes sense now.

trophy

Always great info from George...

Interesting the kit uses a slip fit cylinder (107mm) vs the RS engine with 109 Bore.

Livefreeandrive

Hi, can you email this PDF to me at steve@teamnea.com
TIA!!

01coccobet

Great thing George.

Do you have the M64/21 pdf?
And I tried to search a Torque/power graphic,but couldn't find it...

Any luck here?

tks

Stealth 993

COOL! Would also like a PDF of it.

race911

Obvious to you too, huh? We know the failure rate of the slip fits over the years? Granted, most of the engines end up never really being used in anger.

geolab

The M64/21 documentation is a supplement for this Technical sheet, so nothing changes but the engine numbers.

The important issue, albeit detailed part numbers, technique, etc, is that this document mentions clearly that the X51 option was mounted at factory on cars during production line, and NOT only retrofit.
Of course, some cars were retrofitted after, as well, and this document is for this main reason.
Info from the supplement, mentions that engine numbers 3.8 liters fitted at factory as of 1997, have the serial with S at the end. So for example, M64/22 S for factory and M64/22 SN for retrofit 3.8 liters.
Each car option sticker under hood, and on Owner service manual, was issued before car was produced. An X51 on hood sticker is a 3.8 liter mounted at the production chain.
I have seen the Torque/power graphic on a WKD document for the 993 RS, so if you need it for the X51, RS graphic should do.

JZ98-993

It would be great if I could get a .pdf of this as well, jzcarr@gmail.com. Thanks!

NP993

Guys. If you want a PDF, just right-click and save as a PDF. Or save as a jpeg and then save that as a PDF.

Bill Verburg

What's interesting to me is that there is no change in the DME or chip

and

the production line engines used a different crankshaft which has a harmonic balancer ala 964. All other 993 engines including RS and turbo used the same crank except Cup & RSR & GT2evo which used a 964 crank and(usually) a harmonic balancer

nor was there a change in valves which were as follows,
993/05-/06 49/42.5 non vram
993/20 51.5/43.5 RS
993/21-22 50/43.5 vram