bfellows

Evenin all,

This is primarily aimed at anyone running a stage 1 (or 2 for that matter) 928 Motorsports supercharger. I'm about to place my order (finally) and wanted any hints, or advice to ensure that my installation goes as smoothly as possible.

Order will be as follows:

PORSCHE 928 LH Jetronic(32v) Stage 1 SUPERCHARGER KIT
to suit '88 RHD S4 auto

Porsche 928 Underhood Fuel Rail Gauge Kit

Porsche 928 Engine Lock Tool

PORSCHE 928, 944, 951Cam Belt Tension Tool

I understand that the fitting instructions are fairly comprehensive and I have access to a fully equipped twin lift workshop to ease me through the pain of breaking the 400 bhp barrier.

What i'm getting at is am i liable to encounter any real problems and should i carry out any addition works, or mods as part of the install? (brakes are upgraded, TB and WP replaced, fully serviced, all fluids, in tank fuel pump ordered)

Any advice gladly accepted
Thanks as always

Kevin Michael

New clutch??

Shane

Get a mitivac and make sure your vacuum system is ok.

Jim bailey - 928 International

There might be some issues with a right hand drive car but since I have never seen a right hand drive car ???? The standard installation seems to be pretty easy and well documented.

stuartph

No problems so far with a RHD stage 2

Peter F

Not needed for an auto

/Peter

Jim bailey - 928 International

There you have it up and running on a car per Stuart. Your ONLY problem will be try to keep from being arrested !

Larry928GTS

New fuel filter.

bfellows

Fuel filter done at last service! Car is genrally in great shape with 65K miles on the clock and near as damn full service history. I raised the RHD question with Tim Murphy and the general consensus was that it is not an issue.

My reasons for going stage 1 as opposed to stage 2 are the posts that hint that Mr Murphy is looking at upping the stage 2 spec in the near future....... 500 here we come! (plus the fact that I can't afford it at the moment as my better half wants an XK8)

Tim Murphy

Hi Bert,
I look forward to having you join the boosted club!

One critical part of the car operating correctly is that your throttle position switch must be working properly. I do not have the manuals with me but I suggest removing the LH plug and testing the switch operation using an ohm meter. Maybe someone here could write up a quick procedure to do that.

The Stage One is a great kit. The best part of the Stage One kit is that it is just plain simple and the results are just flat out rewarding. I never would have believed that getting this much HP for so little work could be accomplished so easily. This Stage One is many years of little tweaks and most of all utilizing all the technology that has come about in the past few years to confirm you have the equation written correctly by measuring the results, and not just a dyno number.

Here is a picture of what all comes off the car in order to install a Stage One kit.

The other pictures are of a finished installation. The link to the pdf file (I don't know how to change it to a jpeg) is from the data logging for the Stage One development. I have another data file that also shows fuel pressure but I can't seem to locate it at the moment.

DonT

Tim ---

Here is your PDF file converted to a JPEG file.

Gretch

Bert, the install should be pretty straight forward. I did the first independant install of Tim's stage II kit several years ago. It was a snap. The installation manual was very complete, even back then. The stage I kit does not require a change out of fuel injectors, as it does with the stage II. That was a tricky and delicate operation requiring patience and nimble hands (neither of which I possess). You will have a lot of fun doing the install. If you run into any problems, there are several of us here who will be more than happy to talk you through them.

There are many threads in the archive that detail the steps involved in the installation.........I authored about 5 of them myself.

'Bout the only thing I can see that you need to fix before you start the install is your steering wheel has slipped to the wrong side of the car.......

Seriously though, what Tim said about the throttle limit sensors.......and you might consider having your fueling computer refreshed while you do the install. A healthy 'fueling 'puter makes all the difference........ask me how I know.

Tim Murphy

Thanks Don.
Thanks Gretch.

Here are some pics of the latest development.... the "Murf928 Stage 3".

The car is all ready to get out on the road and do some final tuning and then off to the dyno for the WOT tuning. Just waiting for the weather to cooperate.

What you are looking at is 42lb injectors, custom LH and EZK chips, and 500+ at the wheels. Yes, this is the way it will be offered.

I have all the data logging equipment already installed and I will provide that publicly so one can see for themselves the state of tune the kit is designed with. This will also include knock data from the Shark Tuner. I'll start another thread on this once I get closer to releasing the kit.

BTW, the original intercooled kits with the 30lb injectors and FMU can easily be upgraded to this version by changing the fuel system back to stock configuration with the exception of the 42lb injectors. All current Stage One kits can easily be upgraded as well should one desire.

Thanks to JDS for all his help!

bfellows

Refreshed? How?

Gretch

So happens to be a fellow on your side of the pond who does just this trick. he is a 'lister here too..........

Couldn't be easier. You pull your LH and send it to him. He runs an extensive diagnosis, repairs anything suspect and replaces the custom logic...........But better I let him tell you about it.

Do a search on ECU rebuild, you will find plenty of information about it. We are fortunate to have a guy (or two) in the states who provides this service also. I had mine rebuilt and suddenly, all the little gremlins were gone..........

Test the throttle limit switches seperately. Look it up in the service manual, for your model year..........there are complete instructions on how to do it with a continuity meter. You want to do this early in your install. Because if the limit switches are NFG, you have to remove the intake manifold (87 and up models) to get at the throttle body.