Hi world wide listers,

I'm reading your engine/power upgrade mods with al lot of interest and was wondering: Has anyone tried Porsches original upgrade they put on the 3.3 Turbo S ? I read a few things about it, and it looks very good. It's 380bhp and if I'm right with only 0,85 bar pressure. Looks safe to me.
I would like my car to be a bit more aggresive, and the Turbo S upgrade looks interesting.
I did read it here:
<a href="http://www.0-100.it/porsche/964/turbos33/turbos_engl.html" target="_blank">http://www.0-100.it/porsche/964/turbos33/turbos_engl.html</a>

Any thoughts ?

Regards

 

It is a great idea. However, it is extremely expensive. There is tuner here in Orange county, ANDIAL, that can do it, and in fact they've done it for the factory when the cars were import to the USA.

I have a reference book listing all the parts needed on the "S" conversion.

Regards,

Sonny

 

Sonny,

Please share the part numbers with us???

Does it refrence different heads?
What Turbo?
Cams?
Any mods to the WUR or Lamda system for extra fuel?

I belive Andial did the original "S2" (-v-"S") conversions that included biger Intercolers (4").

For the most part, if we put SC or 964 cams with a K27-7006 turbo with a .9 bar boost spring we are doing what the factory with there special Turbos. X-33, S, S2 and later on the 3.6S the X88.

 

Here is the information. There is a lot of information that is best to scan the pages, but I don't have a scanner handy. I am going to try to list some of the important stuff first.

Engine type: M 30 / 69 S
Exclusive Special Option No X33
Output 355 HP @ 5750 rpm
Torque 471 Nm @5000 rpm

Scope of modifications:
- cylinder head, inlet and exhaust ports modified
- inlet manifold modified
- modified camshafts
- valve timing (setting) 0.9 - 1.1.

Modified parts:
930.105.147.50 camshaft left hand
930.105.148.50 camshaft right hand
911.105.171.02 Spacer flange, left hand
911.105.172.02 spacer flange, right hand
900.105.172.02 Bolt, 4
N 010.183.1 Bolt, 1
930.113.025.03 gearwheels
N 013.349.1 roll pin
930.100.908.03 gasket set
930.104.043.14 cylinder head, 6

There is also references for 911 Turbo S Lightweight with all of the part listed, and there are a lot of parts for this special car.

2 years ago I was lucky enough to have purchased a 911 Turbo reference handbook by Mike Connelland was autograph by Mike, very cool. Mike is from England, but I got the book in the USA. It has all listing of Turbos from the begining up to Gt1 super car.
Hope this helps, regards,

Sonny

 

Sonny,

Great info!!

I think the cams you list are SC cams.

Do you know if the X33 changed the turbo. It does not look like it.

One of the guys on 911Turbo.com has a "S2" which I belive to be an Andial derived build. His also has a thicker intercooler (4") and they use C2 cams instead of the SC cams listed above.

Someday I hope to get some info on the turbo(s) used on the special cars. The S2 guy listed his as the K27-7006. I think the 380 hp light weight that Porsche made had somthing biger but I don't know nor can I find any info on which turbo it was. Reference has been made that it did not come on boost till 4000rpm.

Do you have anything?

Thanks again...

 

check this link out:

<a href="http://www.porscheclubgb.com/uploads/registers/53/" target="_blank">http://www.porscheclubgb.com/uploads/registers/53/</a>

The Turbo S lightweight is what I'm shooting for...

 

If I'm not mistaken the Turbo S ran at 0.9 bar of boost. How about fueling? Did it run at 3% CO?

 

Jeff,

That is the book I got. Great reference stuff.

Regards,

Sonny

 

Oscar965,

Thus, doing a factory "S" is not realy that big a deal. Just add SC cams (regrind yours for $400), a ported intake tract, & a bit more boost.

For a factory "S2" build: use C2 cams and have Andial recore your intercooler with a 4" thick one and add a K27-7006 turbo.

 

A bit more boost? Was it .85 or 0.9 bar?

 

Who knows?

I saw one early artical for the 94 3.6 S flat nose that referenced the S as using a .85 bar spring.

Another owner of another 3.6 S flat nose said his had a .9 bar spring. He could be mistaken, rounded, or miss-spoke.

None of the Porsche documentation that I have seen says what the boost is.

One owner of an S2 that states that he has an aditional Boost Gage and says his stock S2 runs a stock .7 bar.

I think I read that the Light Weight S had a .85 bar spring.

---

My impresion is that most well tuned turbos start to run out of fuel above 380+ hp which could put it in the .85 - .9 bar range.

The 930's were .8 bar and I think the factory specs say that .83 or .85 bar, if I remember right, as being within spec for a euro 930.

The C2t's had a much more effecent cooling & ignition system, Thus .9 bar should be prety safe.

The difference between .9 & .85 is only about 2.6% or just less than 10 hp. (1.85 -v- 1.9 bar) Not a big difference in thermal load on the motor.

Thus, I am with you. Who knows?

Keith