968norway

The airbox mod is pretty harmless, some 50mm holes, some better response. If you have the plastic cover, there should no problem with warm air. Tried the K&N, went back to standard, no difference, using RSbarn chip, works fine. Been at this for a while, there are only small gains to be made without major engine mods (read internal changes or forced induction).

My 2 cents.

Cloud9...68

I don't want to get into what can be a raging debate over the merits and risks of the K & N style air filter, but I do have one data point. I did the air box mod, including the K & N filter, when my car had about 90,000 miles on it. It was tracked extensively since the mod, and I tore the engine down for a complete rebuild (didn't necessarily need it - the project just sort of mushroomed) at 115K. As part of the rebuild, I had the cylinder bores measured at top, center, and bottom by a local machine shop. Their conclusion was that there was essentially zero wear in the cylinder bores, and that my block "would probably be good for a million miles." So, maybe a K & N filter isn't necessarily the kiss of death...

Eyeman

I added a K&N drop in filter and a Superchip in 1995 or so. 170k miles now and embarassingly I think my last oil change was nearly a year and 7k miles ago. I checked my oil level yesterday and it was amazingly still sitting on exactly full and the oil on the dipstick was barely darker than fresh oil. I just wish my car looked as fresh as the engine seems to be. Less rattles would be nice too.

miramar_trieste

Thanks for your feedback..

miramar_trieste

Thanks for feedback...

miramar_trieste

Thanks!

odurandina

i run about 8 k~10 k miles on M1 and just reach in with my fingers and twist on a fresh Mahle at 4~5 k when i get a minute.

miramar_trieste

I think I might go with a supercharger....I spoke to my mechanic today and he thinks that it's the best option to get more power..

docmirror

Nope. It's a high compression engine without a dish quench chamber. Supercharger gains will be modest at best. When you get to the detonation margin, the engine will retard the ignition to compensate. I don't know who you're talking to, but it sounds to me like they want to sell you $5-6000 of stuff, and not be concerned with the best use of your money.

JDS968

Useful engine performance modifications for the naturally aspirated 968 are:

1: DME "chip"

2: New exhaust system without catalyst, utilizing Stahl or other equal-length long-tube headers and high flow (or no) muffler

3: Lightened flywheel

miramar_trieste

Thanks for the feeback..

miramar_trieste

Thanks!

JDS968

Oh and if your oily air filter ruins the MAF, your part number is 951 606 125 02 and you will need to special order it from Germany for $754.50.

tamathumper

I'm running a supercharger and the performance gains are grin-inducingly extraordinary. I don't have detonation issues, and I don't have retarded timing. I just have loads of torque when I push on the right pedal.

Jfrahm

Are you datalogging your timing? I have an SC car as well and I agree you can get great power. However I feel it is is at the limits of what's OK for the motor in some adverse weather conditions or if you were to get a tank of bogus gasoline. The piston skirts are also very short so there is risk of bore scuffing under detonation. The early cars also have questionable rods. I think there is a place for the SC but the IMO I would not trust the engine management alone to keep you from becoming a pedestrian with an empty wallet. Water injection and/or charge cooling, knock counting and a close watch on the noises and behavior would be advised, particularly in warm weather. I have thought about going to E85 which would probably add a nice safety margin too.

If I had my time and money back from the SC I'd rather put it into a V8 conversion. The noise from the SC (Raptor in my case) gets tiresome with the top down. But that's just me and the Rotrex is probably quieter. I admit when I first ran it I liked the SC whine and liked the attention but that has kinda faded.

-Joel.