For those who have waited a long time for it, here is the raw dyno chart for the Capristo Exhaust run at Imagine Auto on the Mustang 4 dyno producing 311 hp. As a point of note the dyno operator Karl usually doesn't start recording until about 2000 rpm because results below that threshold aren't that important or that reliable depending on a lot of factors, and it gives an even comparison to other dyno runs that he does the same way, ruling out how fast his foot went to the floor etc.

Dyno Chart Here:


Full size scanned image here:
http://www.caymanclub.net/gallery/sh...569&original=1

For comparison purposes here is the Milltek Header + AWE Catback exhaust dyno chart from the same dyno, although this chart has been smoothed I believe.

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K-Man S

Soundsthe best and works the best. The run was valves open right? I'd like to see the valves closed chart side by side.

The above chart was desnork+V-Flo+GIAC+Capristo on 93 octane right?

Can't see the second chart clearly, can you please provide the full-size scan?

The Capristo chart is de-snork + V-Flo + GIAC + Capristo (valves opening after 3000 rpm) and 92 octane, we don't have 93 around here.

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K-Man S

Not sure where the original piece of paper is but I found a larger image size that you should be able to make out, note that the scaling on the sides of the graph is different between the two due to different ranges. Also the AWE one has one of my non-modified dyno pulls even though it says that it is Charles's car it isn't the file was mislabelled in the system because we ran back to back in October at Croctoberfest dyno time.

From what I can tell both are pretty similar, which is what I would expect from a modified exhaust system but the Capristo looks like it has a little more here and there throughout the graph and of course a higher total number (311 vs 304)

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K-Man S

I think you might have already told us, but: does the Capristo remote control allow you to lock the valves closed? There are street scenarios where that's preferable, and tracks where that's mandatory because of noise restrictions.


Soooo, I think when you get the underdrive pulley and IPD plenum on there, you'll be brushing up against 3.8+x51 power (381FWHP). And your torque curve is great -- wide, smooth, and predictable. This is a real accomplishment. I think you're going to need some custom ECU parameters to get the most out of the strap-ons, and I'll bet you'll get to 381hp if you go to that trouble. You're about ready to start aero tuning in earnest methinks. As it is I think your car is good for under eight minutes on the Nurburgring, in the right hands. Tweak the brakes (recirculators or PCCB) and add some downforce and I'd bet it would better 7:45 with Rohrl at the wheel (Rohrl drove an OEM 997 GT3 RS around in that time, and a Carrera GT in 7:28, as listed here).

I wonder if Walter is paying to airlift my car over there? I don't know if you can lock the valves closed or not, when I manually open them for a demo I then manually close them and when I drive I can re-open them in auto mode. This is a question for Capristo. My hunch is that you could simply plug one of the vacuum lines or something when you take it to the track to keep the valves closed or bypass the black box or whatever since in default mode the valves are closed it is something in the black box that opens them so taking that out of the equation should give you a way to keep them closed for say a certain track, then re-engage when finished.

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K-Man S

In fact, you can probably make some money by blackmailing Porsche to stop you from shipping your car to the 'ring .

I can't imagine they haven't thought of this. What are the buttons on the remote? Have you told us this already?

Ah ha, now that gives me an idea. If the box can be prevented from knowing the current RPMs, then it will keep the valves closed. How is it getting the RPM info?

keyfob has A button to open valves, B button to close valves, and yes this was already mentioned before. I think RPM is a function of vacuum after they programmed the black box at