What can I expect - 3.2 w/exhaust and chip

[Arne2]

Looking for Pelican feedback. I'm in the market for an SC or Carrera, and one of the cars I'm considering ('84 coupe) has a rebuilt 3.2 (about 30k ago) with Steve Wong chip, M&K cat bypass and euro muffler. I've read nothing but good about the Wong chips, what should I expect from the exhaust? (I won't get a chance to drive the car until next weekend.)

[porschenut]

The exhaust should add some nice sound but very little power to speak of by itself. Most of your gains will be in the chip. I have the same setup in my '86 and the chip made a world of difference. The engine revs more freely and the car has more zip. I've never dyno'd it but I would guess there's about 15-20 more hp above 3k RPM.

[Hugh R]

Can't speak to the exhaust, but the S. Wong chip is as Dave said. Less mid-range loss, it really wakens it up nicely. My brother drove my car when I first got it, and a few months later he drove it again with the S. Wong Chip and his first words were "Whoa, did you tune this thing up or what?"

[Arne2]

Good to know, Dave. Good to hear that there may be nice sound, as this will be my first Porsche after several inline sixes, and the sound from those has been intoxicating. I don't expect the Porsche to sound as nice as the Magnaflow exhaust on the 240Z I just sold, but some nice sound will be great.

[rattlsnak]

Ive had several Zs as well. The Porsche will sound much better.

[DanielDudley]

Getting rid of the cat add to your engines top end, and it will get there quicker.

[kidrock]

the chip and cat bypass are about the best upgrades for these motors, and are desirable. The only downside may be smog inspection issues, depending on your state and how aggressive the smog laws are in your area. I wonder if 1984 gets smogged in your state, or is it now smog exempt.

[Gustyones]

I did the same modification to mine about two months after i bought it. I did the SW chip first followed by the M&K premuffler about a month later. I noticed some chance in acceleration with the M&K but not as significant as with the SW chip. The car just seemed to breathe better and rev quicker. The improved exhause note helps too for that 'psychological acceleration'.

[paulgtr]

I have a 3.2 with a SW chip. SSI's instead of stock heat exchangers but exiting through a M&K 2 in 1 out. some folks say that the SSI's choke off the top end of a 3.2 but I think she rips
this is a video from an autocross. only second gear but you can get an idea from it:

[Bob Kontak]

Originally Posted by Arne2

I don't expect the Porsche to sound as nice as the Magnaflow exhaust on the 240Z

I just went to youtube and checked out some videos. The 240Z sounds really nice with other than stock exhaust. Different than the Porsche but not to be discounted because it's not Porsche.

[88 Club Sport]

My buddy dyno'd his Club Sport (3.2) with a SW chip, euro pre muff and a Borla sport exhaust. He got a little over 200hp at the wheels or approx 230 hp when considering drivetrain loss so I think it is safe to say that all three mods are good for about 25 - 30hp more.

I have SW chips, euro pre mufflers and sport exhaust on both of my 3.2's....well worth the cost and the sound is great!

Here's a chart of what mod's do to a 3.2:

[mrk_d]

Originally Posted by 88 Club Sport

My buddy dyno'd his Club Sport (3.2) with a SW chip, euro pre muff and a Borla sport exhaust. He got a little over 200hp at the wheels or approx 230 hp when considering drivetrain loss so I think it is safe to say that all three mods are good for about 25 - 30hp more.

I have SW chips, euro pre mufflers and sport exhaust on both of my 3.2's....well worth the cost and the sound is great!

Here's a chart of what mod's do to a 3.2:

Interesting. Source for the chart? Steve Wong chip I'm assuming?

[88 Club Sport]

I pulled that chart from a post many years ago. At the bottom right on the last line it lists "911CHIPS.COM" so it is a safe bet it was from their web page.

[mrk_d]

Originally Posted by 88 Club Sport

I pulled that chart from a post many years ago. At the bottom right on the last line it lists "911CHIPS.COM" so it is a safe bet it was from their web page.

Thanks for the reply, missed the website URL at first glance. That chart sure makes a chip and exhaust sound more appealing...

[Nine9six]

Dont look to be thrown back in your seat, or your eyeballs flattened...As previoulsy stated, the S Wong chip, premuffler and sport exhaust, does liven things up, and appears to rev quicker with less lag. Oh yeah, it sounds better too.

[Steve W]

Guys, thanks for the interest. Since that chart was originally created, there would be further changes I would make to it and would prefer that that one shown should be deleted for the sake of accuracy.

With regards to exhaust mods, in all honesty the stock exhaust is actually very good and the best bang for the buck is a euro style premuffler in place of the cat for additional power. SSIs/early style heat exchangers are small for the 3.2 motor and I don't think it will make any additional peak HP over the stock exhaust/premuffler combo. Stock primaries are 1 5/8" diameter and SSIs are 1.5". If you really want to make more power over the stock exhaust with headers, you need to go at least 1 5/8", which can be from European George, SCARGO, Fabspeed, B&B, Bursch, etc. What the smaller primaries will net you is a 10 hp/10 ft-lb torque gain at 3500 which increases the midrange throttle response giving the feel of more power.

Case in point: Several 3.4 and 3.5 conversions in the past couple of years built by some of California's best engine builders were put on a dyno and live mapped for maximum power. All pretty much had the same wammy mods including cams and ExtrudeHoning, etc. On the 3.4s with a completely stock exhaust including muffler but with either a M&K premuffler or sport cat, the engine delivered over 230 rwhp on a Dynojet. On the converse, the ones with SSIs struggled to get past 220 to 221 rwhp, even removing the muffler and putting on megaphones as a test. With each change a quick AFR remap was performed to ensure the differences was not from unmatched fueling. A 3.5 I recently mapped with all the cost no object tricks but with SSIs could only achieve 233 rwhp, yet others in the past with such as 1 5/8" European George headers achieved around 245-247 rwhp.

On a 3.2 with various mods and SSIs and the stock early Bischoff single out muffler, live mapped and optimized achieved a max of 208.5 rwhp. Removing the muffler and installing megaphones and remapping to optimum AFR achieved 210.5 rwhp. The only area of any notable gain was around 6700 rpm with a 8 hp gain from the megaphones. Very interesting as it tells you the stock early muffler is actually very good. All this was done on the same day on the same dyno for 91 octane California pump gas. Later the exhaust was replaced with SCARGO 1 5/8" headers and a muffler, and the same motor made on the same dyno 218-219 rwhp.

Hope this helps.

[dienstuhr]

Originally Posted by Arne2

Good to know, Dave. Good to hear that there may be nice sound, as this will be my first Porsche after several inline sixes, and the sound from those has been intoxicating. I don't expect the Porsche to sound as nice as the Magnaflow exhaust on the 240Z I just sold, but some nice sound will be great.

Funny - I also sold a 240z ('72) to buy my 911... don't miss the Z one bit, but it did sound good with headers

[RWebb]

Welcome - you can drill some big holes in the air filter cover if you want to hear some induction howl

if you remove the cat, you could sell it to someone up in PDX, since they have smog testing there

post a pic of your car & I'll look for it around town

[Arne2]

Haven't bought it yet, RW. Will post pics once I get it (or whatever one I end up with). Actually have two or three I'm considering.