Janina993

Turbine meating surface was also with sharp step from 80 to 72mm. It seems to me customers should be at least car enginer. You can't trust engine tuners have done their development work properly or at all.

TB993tt do you have bigger cats from Cargraphic?
I want to return thease. How should I express my self? "hello, could you send me the proper pipes. I know you have those."

Jean

Janina
Can you please PM the name of the person who answered you this at Cargraphic. I am asuming it was in Germany?

Thanks

TB993tt

The "blurb" that Cargraphic gave you about RS Tuning developing on the dyno is true, but what it doesn't mention is that those smaller cats were developed on the dyno in about 1999 to work with the available componentry - For my engine built in 2004 RS ripped out the older smaller cats and put in some newer 130mm units but this required full remapping on the dyno to take advantage of the higher flow (which particularly helped the power from 6000 to 7000rpm.
Cargraphic do not sell any of the newer stuff as it was not formally developed as a "package" and they are probably correct that the bigger cats and tubing would not work optimally with the older (engine dyno developed) packages.

I am not sure where the rest of your components are from (ie turbos, cams), are they all from Cargraphic ? If yes then the smaller cats will work optimally......with the ECUs which Cargraphic sell, but you say you are getting ECU tuning from "wizard" ???

I hope you don't end up with a "mish mash" of parts with noone to bring them together with proper ECU tuning.......believe me this happens sooo often -There are so many cars which arrive at RS from big name other German tuners with 550hp which turn out to be more like 470hp on the engine dyno

Jean

I guess this explains it very well.

Concerning tuner claims, and sorry fot the OT, I have recently seen a 997TT "610HP" package form a major US tuner that only gave 380 RWHP when run on an independent dyno. These things are reality and they happen more often than we think.

Janina993

-K24RS turbos from Cargraphic (made by RS-Tuning)
-sport camshafts from FVD (suitable for hydraulic lifters)
Man named Mika Karala from Finland will remap my ECU on the dyno. He is highly respected ECU tuner and has very long experience of remapping German cars.

Some scientific testing would be interesting now. We remap the ECU on the dyno with stock exhaust. Change Cargraphic exhaust and remap it again.

TB993tt

MOD500 on here has what sounds like a similar build (using RS 3.8 N/A cams) and the same turbos which were treated to ZC and rebuilt by Kevin M....
With the 130mm cats and large bore Cargraphic race exhaust his car was optimised on the engine dyno to 533hp and 729NM - He posted the dyno curves here:
https://rennlist.com/forums/993-turbo-forum/242698-dyno-sheets.html
You need to make sure your mapping is not of the ilk of fixed boost,unloaded power run, tweak, another unloaded power run......hey presto 550hp and 800NM

Janina993

Yep, I manage to get information from my cams. FVD has forget one number on package 993.105.247.41 and it's RS 3.8 N/A cam. I don't understand why it's so secret they won't tell cam timing if you ask.

TB993tt

Its secret because gaining the knowledge has cost some companies a lot of money in development/engine dyno time and they need to recoup that investment
I can tell you for free that the cam timing is the stock 993RS cam timing
If you could persuade RS Tuning to sell you (and MOD500 to agree to) the same map as they developed for MOD's car it would be a great starting point and probably the best finishing point you might achieve.

Janina993

Any recommendation which spark plug? I'm using single plug head.
Before I have use Beru new design 4 point plug in N/A engine.
I've heard 951 fellows prefer NGK.

Janina993

After I have read all the threads considering ignition I have choose following items to make sure I get good spark.

-Denso IK22 spark-plug
-M&W single channel CDI
-M&W new design CDI coil

Janina993

I feel glad to report that engine rebuild is now ready!

When I finally receive newly machined heads it took one week to start engine from key. We measured 25% flow improvement from head intake at 2-5mm valve lift. At 5-10mm valve lift improvement was 10-20%.

rebuild has been huge success without any big problems. Only problem was leaking connection at GT oil cooler after running engine hot twise. I removed front bumber and tighten it. Now I have drove 600km without any problem and every part is still dry.

Engine seems to have fantastic character, it rev's very freely now and LWFW is perfect together with lighten rotating parts. Low end torque is still there and turbos are fully woken up from 3000rpm and keep pushing untill limiter.
We started to reprogram ECU last week and this week on friday we should be ready. Dyno runs with stock ECU mapping is promising a lot!!
I won't give any numbers before we are ready but will post dyno curves when ready. I will also make 60-130Mph measurements because dyno curves seems to be quite dispute subject.

I'm very thankful to Rennlist specialist like; Kevin, Jean, Steve Weiner and Geoffrey. You have give me invaluable tips and you make possible truly Porsche enthusiasts maintenance their beloved cars by them self. After all I believe all Porsche owners are somehow interested of technique.

P.S. I'm flying next monday to Bainbridge, Georgia and staying there from April 24 to June 25. Can you recommend me any place to visit? Maybe something to do with Porsches or beautiful ladys?

TB993tt

Thanks for the update, I for one am watching with great interest

I can't remember, were you planning on fixed boost or has your ECU man the ability to manipulate boost via Motronic ?
If the former, can you share what "strategy" will be employed, ie what boost level ?

Janina993

Hi TB,

we will manipulate boost via Motronic.

On dyno we can see what could be reasonable boost but we think 1,3bar.
Many German tuner seems to prefer 1,3bar.

What you think about it?

TB993tt

1.3 bar at peak torque is good reducing to around 0.95 bar @ ~5500 rpm if one wants to have power which stays around when things get hot.

pedsurg

While in Georgia drive the newly repaved Road Atlanta, then do Road Atlanta then well you get the picture. Contact the local PCA and the BMW-CCA. You might consider gving the "Flying Finn' a call although he's in Miami.

Jack