GTR 993

I am looking at several different chips, Authority, Weltmeister and H&S? Has anyone used any of these chips and had noticable gains? Also how hard are these to install, I have a 95 993 and I have read you need to remove the seat. Sounds like a pain in the A@%. Hopefully this is not the case. One other upgrade I would like to do is the airbox. Weltmeister has an airbox upgrade I have been looking at, I can't see a huge gain from this any idea's in HP gains for an aftermarket box. I am sure a large percentage of members have seen questions like this time and time again I apologize for that but I am very unfamiliar with Porsche. My past cars have been: C5 (6 speed),Audi S4, 323 Ci and that's pretty much all of the sports cars I have owned.

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os993

[quote]Originally posted by GTR 993:
<strong>I am looking at several different chips, Authority, Weltmeister and H&S? Has anyone used any of these chips and had noticable gains? Also how hard are these to install, I have a 95 993 and I have read you need to remove the seat. Sounds like a pain in the A@%. Hopefully this is not the case. One other upgrade I would like to do is the airbox. Weltmeister has an airbox upgrade I have been looking at, I can't see a huge gain from this any idea's in HP gains for an aftermarket box. I am sure a large percentage of members have seen questions like this time and time again I apologize for that but I am very unfamiliar with Porsche. My past cars have been: C5 (6 speed),Audi S4, 323 Ci and that's pretty much all of the sports cars I have owned.

<img src="graemlins/a_smil17.gif" border="0" alt="[blabla]" /> </strong><hr></blockquote>

I'll gladly try to answer some of these questions, but have you tried the "search" feature? Most of these topics have been discussed in the past, and a lot of info is available - just a friendly FYI.
1. Chip makers is subjective. Steve Weiner of Rennsport systems has highest respect on this board - as for others, not sure.
2. You do not have to remove the drivers side seat to get to ECU.
3. Airbox upgrade should be done as follows. Remove current air box cover and drill as many 3/4" or even 1" holes as you can. Will DRAMATICALLY improve sound of car, as well as improve air intake. Personally, stay away from cone filters, or high performance filters (K&N,...) - not worth it whatsoever!
3. What kind of suspension do you have? Do you have M030 (sport suspension)? One upgrade many of us have done on this board is to install European springs (American springs are WAY too tall).

Cheers and enjoy!

GTR 993

I have (M030 Sport Suspension) I am assuming that you don't have to worry about rain when drilling holes into the box, You drill holes in the top,sides or both? The weltmeister looks like they cut the whole top of the box off. I can see my wife opening the garage door and asking me what in the H@&# am I doing drilling holes in my new $40,XXX toy (HA HA) Thanks for the information it would be nice to see some pics of a "Homemade Box" Thanks Again

os993

stay away from the fully cut out airbox options. Drill the holes only on the top of the airbox. Once done, nobody we'll be able to see it, unless you look closely. No problems with water getting in. Since you have M030 suspension, a very nice future upgrade could be installing some European springs. Devek (check Excellence or Panorama mags for tel #) has great prices on these.

Matt Vaughan

GTR, I recommend talking to Mr. Steve Weiner at Rennsport Systems concerning a chip remap.

<a href="http://www.rennsportsystems.com/~porsche" target="_blank">http://www.rennsportsystems.com/~porsche</a>

Removal of the driver's seat is necessary, but is very easy. It's only 4 allen head bolts and a couple plugs underneath the seat.

It would be a very worthwhile upgrade.

Hank Cohn

Oleg and GTR 993:

I have a Motorsound airbox cover and an airbox cover that a previous owner drilled. Interestingly enough, the one that is drilled had a pretty terrible drone. The motorsound cover, conversely does not. It doesn’t matter which is on the car from a performance point of view, so I use the motorsound airbox cover.

Also, I had to remove my seat to get to my ECU and further, I had to drill out some sheer bolts to remove the super-protective metal shield covering the ECU. Unless you have unnaturally small hands and arms I don’t think you can remove the ECU without removing the driver’s seat. If you can, I don’t think you would save any time.

Personally I am not a big believer in chips, although I have ordered one from Steve W. It is more of a curiosity thing than the thought of miraculously finding gobs of hidden HP. Steve is very careful to manage your expectations about the chip and is a NO BS kind of a guy.

As Oleg points out, there are several nice suspension upgrades that have been discussed on this board. My personal favorite for a car that is occasionally taken to the track but mostly a street/weekend car is the Euro M030 option.

Hank

tom_993

A quick search of the archives would have revealed this alternative to the “Weltmeister” (we all know where they really come from) airbox cover. Instead of spending $200 or $300 for the Weltmeister, spend $2 or $3 for this one (for the clips and small filter). This way you don’t have to go drilling holes in your new $40+ toy. Worried about water? Swap the cover on. Going to the track? Swap if off. There is more discussion in the archives.

Tom
’95 993

E. J. - 993 Alumni

No offense Hank, but here is how I drilled mine:

<a href="http://www.pcarracing.homestead.com/airbox.html" target="_blank">http://www.pcarracing.homestead.com/airbox.html</a>

AS for the rest, learn to drive the car before you learn to mod the car.

E. J.

GratefulJED

Oleg:
You said to "stay away from the fully cut out airbox options". Why do you say that? I cut the top off of one of my airbox covers and just wanted to know if I were doing something wrong. I will say that I have a rough start up. Maybe they are connected, so I will put back on the motorsound cover and see if it clears up. Thanks

smithk993

As for the airbox modification, the one shown by EJ is easy to do and the sound is outstanding in what my young daughter calls the "snarl zone", somewhere above 5K RPM. Below that it's not very noticeable. I really like the effect.

For Chips, let me register that I have been waiting since December to get a chip for my 95 from Rennsport without success. There is some kind of problem with the "encryption software" that they use to protect there mods from prying eyes. I send email on a weekly basis inquiring to the status and only get periodic responses that it's should be anytine now...let me know if you find otherwise.

ZCAT3

GTR - I went through this exact same thing over a year ago with my newly purchased 1995 993 C4 Cab. In any event, I ended up using the Weltmeister chip (I had not yet met Steve W of Rennsport or I may have used his chip), fabspeed exhaust and a powerflow air intake system. I did not dyno the car as there is no 4 wheel dyno I know of in the SF Bay Area, but the butt dyno did notice a difference in acceleration. After the changes I could pull a 5.5 0-60 as measured by a G-Tech with a street start (basically just letting go of the clutch to get the car rolling and then flooring it). Before the change, 6 seconds was a challenge. If I had to do it over, I would get either the same chip or a custom one from Steve, I would skip the powerflow and just do an airbox mod such as E.J.'s, and would get RSR Mufflers from Robin Sun and fabspeed muffler tips (they are really nice).

As an aside, after all of this I ended up selling the car and getting an already modified 993TT (something like 500HP). At the track all that power is wasted on me, but it is so much fun on the freeway and on the back roads.

GTR 993

Wow I really appreciate all the help and everyone seems very knowledgable, I am still somewhat confused a small percentage of people say you have to remove the seat and some say you don't. Is it the case where 95's you don't and newer you do, maybe? I guess I will research that myself. But thanks again and BTW who is "Steve" and how do I get in touch with him?

pmcgrath

gtr,
I just had Steve remapp my ecu. The drivers seat had to come out. The car is far more thrilling to drive know, IMO its the way the car should be from the factory!...I highly reccomend it

Rick in Portland

GTR,

Steve Weiner owns Rennsport Systems in Portland Oregon. You will not be disappointed dealing with him.

His number is 503-244-0990

Rick

GTR 993

Thanks again for all the information, This site has been very helpful. I have done some minor things to the car since I have purchased it: Aluminum Interior, Leather and Aluminum shift ****, drilled the airbox (Sounds Great) I heard Supercup exhaust is 30 lbs lighter and has a more aggressive sound any ideas on that? I also added a strut bar and new brake pads and rear rotors. I want to chip it, exhaust,coil overs, sway bars and that will keep me for awhile.