Want more power without being blown!
 

This year I wish to gain perhaps 40 H.P.
I'm not looking for a turbo nor a super charger.

I do not wish to change the dynamics of the vehicle as was intended by the factory sample.

-Has anyone gone the way of breathing/intake /manifold/ exhaust?

From whom and how much gain did you find?!

Cost?

Thanks

Depends on model year, but most respond really well to a good tuned exhaust, not just high flow but with a tuned merge and X or Y.

Exhausts and Turbos are nice, but I'd rather be blown.

Are we still talking about 928s here? ;)

Yes: turbochargers are a blast & a half: ask me how I know. :)

You could do a full exhaust & sharktune: would be good for 40hp or so, maybe a little more.

My turbocharged 928, even at 4psi makes nearly 100rwhp more than the average 32v 928.

Mark

The exhaust will be your best option, however nothing good is really cheap, I tend to make my own parts as that way I can't complain about anything. To do the exhaust properly allow $2,500 and that will be the whole system but not all in stainless, maybe add another $1500 for a complete stainless system. That will give you a decent improvement you can build on. Good luck.

MarkRobinson, show us the turbocharger setup. Some of us wanna see how it's done. Is it twin turbocharged or just single? And yes a supercharger is nice too, but I'd still rather be blown. lol
I really want to supercharge my 928, but not by removing the original fan. I wanna do it with a small supercharger up from where the A/C is. I talked to 928 Motorsports about this and they told me that it was difficult to get cool air to the supercharger. I think it could be notched out the firewall for a cone close to the brake ducts, but they insisted It was a bad idea to put the supercharger there at all. I don't want to modify the fan unless with Porsche parts though.
I'm also not going to pay $4,500 for a supercharger kit that I don't like.
He was also kinda unfriendly to me for questioning his judgement and said they "weren't going to tell me how to supercharge a 928 when they've spent so much money to develope a good supercharger system". That's all well and good, but I don't like their supercharger system.

I saw a page recently recently of someone removing their AC compressor for a supercharger setup. let me dig around find it. he had to make his own bracket to hold it in place though. it was hosted on the user pages of the norcal928 website, just having trouble finding it now. were you thinking something more like that?

Yes, I can fabicate anything out of steel. I have welders, grinders, sanders, and anything else that is needed to fabricate my own bracket. I just don't see what all the hulluballoo is about putting that particular supercharger kit in a 928. I've considered a supercharger out of a Mercedes C230 Kompressor. It's compact and will fit in the same place in the 928. It's also made in germany. I'm just not sure it would have enough boost for a V8.

I'm also curious about Chips and the K&N filter.
Chips-any real gains?
Filter .......anything tangible that can be recorded?
Thanks fellas.

I have K&Ns in all of my cars. Even the Mercedes. I tried some E3 plugs a while back in my '83 928 (the one I want to supercharge), but I really like the Bosch Iridiums that are in my '84. They really make it run spectacular. I just can't seem to order them anymore because they are always out of stock. So I tried E3s and I'm not terribly impressed with them. I also have a Jacobs oil bearing coil in my '83 928. It works great and I've had no problems with it at all. I kinda don't trust any other companies who sell these though including Accell who bought Jacobs Electronics. The Accells don't look as good to me and may not be the same quality or design either. I've heard of a lot of people having trouble with MSD and other coils in 928s. The original Jacobs Energy Coil is sadly discontinued as well. They had an application for the Porsche 944. My last 944 had one and I loved the way it ran too.
Oh, and I can't chip my 928s. I think you have to have an '85 or later to start chipping. I don't recall, but I'm positive the 944s have to be late '85s.

Years ago when the 85/86 models came out with VERY conservative spark maps, AA and others made a bundle selling pretty minor changes, but like many chip sellers, saw no need to invest in real developement as the bottom could drop out of the chip market at any minute.

I don't advise using AA chips.

Porken has a heck of a chip for the 85/86, many happy customers and he can't stop working on making it better with free updates.

87+ have sophisticated knock detection in the brains and very little to be gained from chips.

K&N filters work great, for making K&N money, but have no flow advantage over a clean factory filter. Unless the K&N is oiled CAREFULLY oil ends up on the MAF wire and it is degraded faster than normal.

Change the factory ignition parts at your own peril, be prepared to put everything back to stock as the first step of addressing any problems.

If you want more power the absolute first step is to make your car run PERFECTLY in stock trim.

One of my friends uses a K&N in his 944 race car, but he doesn't oil it at all. He says he get's better lap times with no oil in the K&N. Since he's one of the top ten in nationwide SCCA racing, I believe him. So I don't oil mine. I knock them out to clean them.
I'm in the process of gutting my '83 928. The car is in my shop waiting to start pulling the A/C on monday. I'm hoping to lighten it a lot. So far it has a deleted stereo, amp, windshield wipers, sound deadening, spare, back seats, rear carpets, tool kit, hatch latch, and hatch motor. I'm going to pull the window washer fluid tank, and the front headlight washer tank when I pull the A/C. I'm going for minimal, but right now most of the car still looks stock. I put some black carpet where the back seats were. I want it to be my sleeper while the original '84 928 and my 911 just linger in my garage for a few more years.

You only need to oil the K&N if you want to filter out dirt, otherwise its basically a sand and gravel filter, which I suppose is fine for a track car, but still should have no flow advantage over a clean factory filter.

There's not really a ton of things to do to a 928 other than Exhaust, or Supercharging...So, I went with a high flow Cat, and cat-back exhaust from 928 Motorsports. Made a big difference in overall power.

You can also get Hi Temp Coated Headers from 928 Motorsports, too. That should be a big help, as well, BUT.....it might run you a little over $2300 for everything??? Better than $5K for a supercharger! :)

You can also go with a chip, as long as it's '85 or newer, but, I never had too much luck with those...(At least back in the late 80's / early 90's, when I was an auto-technician.)

But, I would imagine (assume) that chip technology is much better now then when I used to install them.