Paul D

Carl - Great Job. Do you think the stage 1 kit will work on the M28.11/12 type motors (CIS, 10:1 CR, 300HP)?

Tony

I will second that and will also add something that no one has brought up yet, the sound. The Powerdyne S/C that he uses is quiet. I mean, for all practical purposes, silent. At idle you do not hear it, period. I couldn't at least. I was even more surprised under boost at how quiet it was. The engine noise is louder. VERRRRRRY STEALTHY.

My biggest hurdle in all this will be to dig up a nice silver 3sp Old bugga and give my current S4 an evil twin. A car like "Pimp Daddy" Kempfs would be the ticket kicking out over 300 rwhp. Dont know about the gold wheels though. unfortunately, until "she" says "yes dear"and gives me the go ahead, it aint gonna happen for a while. I mean, i have my own SC thing going on and a spare engine in the garage. Another SC 928 would go over like a fart in a space suit.

Nice kit Carl, Im glad its all come together!.
Time for me to read up on CIS

Carl Fausett

Randy - the original viscous clutch belt-driven fan is removed and discarded.
Two small electric muffin fans are added, each producing 850 CFM, in addition to the Porsche A/C fan that is already there. We have found that A/C fan by Porsche/Bosch is damn good!

In Wichita, at the 928 OCIC, it was 97 degrees. We ran three max HP runs on the dyno, idling in the shop before and after, then we drove it around town, (did a posi burnout like a little kid at a stoplight next to another 928) and never over-heated. Needle stayed cooler than that on my track car.

Paul D - we are sure it will, as we have seen the 10:1 32v motors take 9 psi without a problem in Tim Murphys kits, for example. For the 10:1 motors we recommend our Stage 2 kit so you get properly intercooled, and the 6 psi pulley on the head unit to start with.

PSI can be upped without much work when you want to... take off the belt, take off the Supercharger pulley (the driven pulley) replace it with a smaller one, put the belt back on. That's it.

Carl Fausett

Here is the Dyno Chart:

Carl Fausett

Here's a pic of the finished install:

Old & New

Carl,

No concerns about sucking the hot air from the engine compartment?

onebad928s

Quick Carl,
How far is the sc pulley from the radiator? Also is the car a 5 speed or automatic? Do you think your power would be greater with a better air intake design (air filter). What does your intercooler set up look like installed.

Lou
83 928 5speed

Carl Fausett

Old&New - no concerns on that Stage 1 kit. On the Satge two kit we chill the air just befoire it enters the motor with our intercooler (co-designed and assembled for us by the experts at Bell Intercooler) so again, no concerns their either.

OneBad928s - Our crankshaft pulley is about 3/4" longer than that on a stock 928 GTS - that's all. (If you've ever seent the crank pullies on the 928 GTS they stick way out there too) We designed it so that you can install this complete kit without removing the radiator if you want - there is enough clearance to get the breaker bar in there and remove the crank pulley bolt.

The dyno chart is for a 5 speed, we all ran our Dyno runs in 4th gear (3rd gear for automatics) I'd take another 5% off for an automatic as a approximate.

...and here is what our intercooler looks like installed:

jon928se

Carl

you have to edit your pic of the Gold car and remove the 30hp loss making spiral hose from the SC to the K&N.

Seriously ( I have no interest financial or otherwise in Carls S/C kits, until he does a 32V version! ) having met Carl and his two sons in Wichita and seen the quality of the installation and the obvious Engineering input that had gone into it I would seriously consider going the S/C route if Carl ever does a 32V version.

I would go further to say that it was reassuring that all three (Father and Sons) were open to admit that their "speciality" was the 16V Engines and not the 32V engines.

Have you got the clutch bled properly yet Carl ?

Regards

Jon Holdsworth
Black SE
Slate Grey GT (Rhondas)
was driving Jay Wellwoods 968T at OCIC

Carl Fausett

Gee thanks, John (I think) ;-)

What John is referring to is this: at the 928OC I had the K&N air filter connected to the supercharger by automotive grade flexible air ducting.
During the first dyno run, the suction caused by the supercharger almost sucked it flat they told me (I was in the car at the time).

The amount of the collapse of the spiral wound hose is equal to the amount of resistance in the filter at the end of it, my engineers tell me. We had figured "K&N performance filter = no resistance" but apparantly not.

The quick fix at the dyno was to yank it off and do the remaining dyno runs without it.

Anyway, we are develeoping a mandrel bent metal tube connection to the air filter that will prevent this from ever happening again.

Its actually a good thing - cause that allows me to recirculate the PCV gases back into the intake like the factory setup, instead of venting the crankcase breather to the atmosphere.

Mark

Carl - Any issues to be aware of with the higher c/r on an '85 EURO?

jon928se

Hi Carl

I guess after ten days in the US and three days talking 928s I am still "two nations divided by a common language" in a manner of speaking.

If I had a 16V 928 I'ld have removed the S/C from the gold car and brought it back home to the UK. Nuff said ?

Jon Holdsworth
Black SE
Slate Grey GT

Old & New

Carl,

I guess I was just wondering if you had calculated the efficiency loss due to pre-heated air. Negligable or significant? (or dunno - it just works fine)

toofast928

Carl,
On your web site the powerdyne unit can be overhauled. How often is this necessary? 1000 miles, 50000 miles?

Tony

Carl Fausett

Too Fast - The Ford Mustang guys send me their Powedryne superchargers to rebuild (we are a authorized Powerdyne dealer) and, generally speaking, they have between 30,000 and 60,000 miles on them when they are sent to me. The "Silent Drive" head unit that we use has 4 permanently lubricated and sealed bearings in it (ASEC 5 class for you techies) that we replace along with the Kevlar internal belt.

It's this internal belt drive in the Powerdyne BD-11a that gives us the total lack of supercharger "whine"; and the permanently lubricated bearings that gives us the easy install (no oil lines to run to and from the motor) and a cooler air charge (no hot engine oil heating up the supercharger headunit to engine oil temp).

But - everything in life is a compromise - these benefits in this model of blower come at a small cost - that once about every two years or 30,000 miles the bearings and internal belt should be refreshed.

On our Stage 3 Race kit - we use a gear-driven headunit, with oil lines and traditional supercharger whine and all - but there the benefit is it can tolerate much more abuse and frequent higher revs.

So, its more like matching a supercharger to the application: street or strip, and the features you desire.

Jon928SE - sorry we never finished our "bearing 2 and 6" discussion before you went back to the island. And - you can't have my supercharger off my gold car, you bloddy ****** - but I'll SELL you one!

Cheers! ...and take care of our Kiwi friend!