edz968s

I have, as you know the earlier S2 kit.
As it is, I`m running stock crank pulley 5" I think, with 2.24" grooved pulley and double sided belt, (1570mm).
The injectors that were provided then, BOSCH 0 280 150 558 42lb, would now be ok to use, thats if they are the ones you are now using, rated at 42lb.
Based on the calculation on your web site, of 5" crank, 2.24" pulley @ 6700, would give 44866 RPM on the S/C which is under max, so would these be wise to fit now.
What also, is the difference between the new mounting brackets?
Finally any news on the improved head cooler unit?
With the above set up I`m getting no belt slip and a good idle,
performance has markedly improved since the grooved pulley/double belt set up, but no figures as yet, seat of pants feeling is noticeable though.

Carl Fausett

Your comments make me think you should leave it alone, Ed. You have a good idle, no belt slip, and a good tune with "Markedly better performance"

Are you sure you want to keep playing with it?

I do not know what changes you made to get the double-sided belt in there, so I cannot be sure that my new parts will be compatible with your homemade setup.

That all being said - if you want still more boost - you need the parts I have listed and some sort of engine management system to tune it. You can try the 42# injectors, but we needed 60# injectors on the one I did (we got that much boost).

edz968s

Tried the 40lb injectors today and no good,mis-firing and lumpy idle.
Re-fitted OEM injectors and fine.
So my set up now is as good as it`s going to get with the components I have.
Got a R/R booked at the end of the year with a Porsche specialist
http://www.bobwatsonporsche.co.uk/?rolling-road,37http://www.bobwatsonporsche.co.uk/?rolling-road,37
So hopefully see what my final results are with this final set up

Eric_Oz_S2

Are you running an O2 sensor still? It should eventually adapt the maps with 40 lb injectors. Did you try disconnecting the battery to clear the lambda adaptation tables?

pauliedg

I have bought Edz s/c kit and will be installing it today - I just hope i don't have to go through the ball-ache he did!

Eric_Oz_S2

I suggest you enhance the kit by getting an Ostrich 2.0 Emulator, WBO2 logger and then start learning how to use Tunerpro.

Good luck

BerndCF

Eric, "WBO2 logger" means just something to get a logfile of the wideband oxygen sensor signal?

Eric_Oz_S2

Yes - but importantly it needs to be logged against RPM, and ideally throttle position as well. The innovate LM-2 is a low cost logger that does this. It's not the best bit of kit out there but it does the job.

What you are trying to achieve is to log AFR against RPM for PT and WOT fuel maps so that this information can be used to adjust the AFR to the target value.

pauliedg

What I'm hoping to do is install what Edz had and hopefully make it work without lots of add-ons, which was the original purpose of the kit. It seems that after reading through the entire thread, there were a lot more problems with the kit (despite Carl's best intentions) than most people were comfortable with. If the kit had done what it was supposed to: easy install followed by a reliable but decent increase in power (regardless of street or track usage) then I suspect it would have been a lot more popular. What seems to have happened was the people buying the kit had to do the R&D work. My car is only for street use so hopefully it will work fine, however there is a good chance I will be back on here asking a few more questions but I will keep everyone updated with how it goes. I've put some pics of my car (the pimpmobile - metallic violet blue with an almost white interior (must have been specc'ed by Liberace)) below. Oh and Merry Christmas, everyone!

pauliedg

not sure why the photos didn't come up

Jfrahm

They don't want to embed.

http://www.flickr.com/photos/60462506@N04/7670523076/

http://www.flickr.com/photos/60462506@N04/7670503020

http://www.flickr.com/photos/60462506@N04/7670490816

odurandina

i wonder if megasquirting would have helped the power output.

odurandina

Had one of the most respected Porsche guys in USA say about
a decade ago: "The 4's and 6's don't take well to supercharging."
he then went on to say
"The laws of automotive engineering don't jibe well with the
low torque, and high heat Porsche engines inherently make."

I believe:
The 928's seem to take to superchargers better: being big strong V8s.

Best: a 'roots' blower:
The 968 has a ton of torque for a 4 cylinder: no question.
It should in theory, take well to a roots supercharger/yes!!!!

Thanks to the invaluable experiences reported by dedicated pioneers,
(see the OP) and their disciples,
i've come to believe you need a lot of torque to drive the supercharger,
really good oiling, a toothed belt drive setup, an intercooler,
very modest expectations, re; many visits to the petro station,
and (1) no, make that (2) spare superchargers.
You need something to warn you of the first signs of trouble with
that bearing, so you can shut down...........
All bets are off--if the Supercharger explodes,
which if you're honest with yourselfs, appears a foregone conclusion.

In closing:
Be kind: to your precious engines.

oz968

Agree about the 928 as I had an Andy Keel kit utilising the M112 Eaton Roots blower on my 928 S4
It was a different animal with the additional 100 h/p
My 968 with Carls blower was a mission to fit and had numerous CEL issues and idle problems that were unclear as to the fix and as discussed took my R&D to work it out.
Which is unusual for his kits as I had one on a 308 Ferrari and it was a good fit and no issues.