Marine Blue

Joe, do you know if PSE is more or less restrictive than the standard exhaust?

I'm also curious to know how much louder and different would the exhaust sound if you only installed the headers and cats. What kind of horsepower difference would you expect if just doing the headers and cats.

RobSpyder

I've been thinking the same thing. Someone has to have done it, no?

Jay9722

LOL! I don't have a track available to me but I am in fact "on the job." I would never abuse my authority to speed or get out of a ticket but I have "tested" the upper limits of my cars from time to time. But you are totally correct about the 996. It has a great deal of performance that I will never really use. The Spyder was a blast to drive at speed or hitting the twisties and never getting to fourth gear. If I find the right Spyder I think I will make some changes to the headers, cats and exhaust as was suggested in another post. I don't need a rocket...just a little bit more grunt.

terbiumactivated

I know about "the brass pass" , besides what officer is going to write you? I know most do not abuse the power but you can easily drive 80 in a 55 as most cars do anyhow, you just get to do it without any worry.

Jay9722

I am a Federal Agent so I have to be very careful about getting pulled. A lot of police officers aren't forgiving when they pull over a fed in a Porsche. I have been pulled in the Spyder before and the trooper made a comment about getting paid too much and driving a P-car. I told him we probably pulled down about the same per year and I saved for years and could only afford a Boxster. It deflated his ego a little bit and said "shoulda got a Vette." "Yes sir but I can't quite afford one of those yet..."

terbiumactivated

Who do you think named it the brass pass? I appreciate what you're saying, my family tells me the TSA is a PIA, so they give as much line as possible. Still, if I were you, I'd drive the way I want and let Mr. Road patrol thump his chest, when he's done you're leaving free to go and if not the ticket is getting code sixed anyhow.

Chris@Fabspeed

PSE is less restrictive than standard when the valve is open, but the headers still have major restriction in the primary catalytic converters.

Supagoat

Hmm, so swap the headers? Sounds like a plan to me. I did it for my Miata (along with mid and exhaust) and got a tune and it made a big difference. I don't know that I'd want to do the whole exhaust and definitely not a tune on a Spyder but the header.... Yeah, why not?

2XIPA

I'm on the road and don't have the Excellence article about the BS and CR match up handy. But wasn't the exhaust section between the the headers and cats apparently 5mm larger on the CR said to be causing the 10 HP difference.

If so it may be a less expensive alternative to those looking for an extra 10 HP.

Supagoat

Looks like there's 10hp / 5 lb-ft in the exhaust:

Dino V

Sounds like you have found your next toy....

mile2424

Any sounds clips or vids Joe?

Chris@Fabspeed

That dyno is of the "Race" system (Race system is what we sell to the ITC Cayman race teams). The race system and the Maxflo system have since been redesigned and make more low and mid range power. The top end is about the same as it was, as the limiting factor on the top end is the factory headers.

Here is a dyno of Joe@Fabspeed's Boxster Spyder with the redesigned Maxflo system. You can see it makes power across the entire rpm range. Peak power on this car was up 9 to the wheels, and 8 ft. lbs peak to the wheels, but there are areas where the gains are 12+ Hp and 10+ ft. lbs torque, to the wheels. This is with the stock headers still on the car.

We are working on a number things for the 987.2/981 which will be tested on this particular car, when those runs are done I will post the graphs.