gt3ranger has the fvd stage 2 (ecu filter exhaust) and dynos at champion showed as much as 45hp gain (mid range gains).

 

That sounds impressive!

 

I have the FVD headers and ECU upgrade on my GT3. It is the race exhaust, the side mufflers are totally deleted (total savings of 39 lbs). The bulk of the gains are from the headers as per the dyno runs. There was also some issue that the full ECU gains could not be reflected because is had to be done on a dyno were the front wheels are turning. I'm not to clear on that one. Peak gain cummulative was 26 rwHP. ECU was good for 5 to 7 hp ? The real awesome results were in the mid-range (3000-5000). the dyno graghs compared to stock run was 40lbs torque and 45 rwHP gains. The additional issue is the car's exhaust sound. It is outrageous. It is loud but clean, race car like. The down shift throttle blips are wicked. There's no mistaking that you are down shifting.

 

I had my 997gt3 dynoed at EPL in CT on their Mustang dyno - it is the same dyno that AWE uses. My car dynoed 379whp and i believe AWE's mule car for their upcoming exhaust and headers dynoed 380-385. Having spoken with them (thanks Mike) while we were dynoing my car, we used basically the same input factors that are required to operate the dyno. So basically, taking an average of the two, the 997gt3 produces around 382whp on a mustang dyno at the wheels - obviously, different days produce different temps, hummidity, etc and also dyno cooling, fan placement, brand of gas etc, can and do make for different readings but I think a good number is around 380whp "on a mustang dyno".

I suspect that a good exhaust & header combo with a software flash should be able to get 20whp more = 400whp on a Mustang Dyno.

Now, put some lightweight seats in, some lighter rims, a lwfw, remove a little sound material, tool kit, some carpet and plastic from the trunk and you should be able to get a car that with a 1/4 tank of gas weights #3050 and has 400whp - swap out the stock R&P and replace with a more appropriate track setup that reduces top speed to 165mph and you will have a properly geared car that will be very streetable and is now a few seconds faster than other GT3s at the track - oh, and get rid of the stock MPSCs and replace with a stickier tires for trackdays and properly allign the car with the better rubber to dial out the slow corner push.

 

Also must add that I had the single mass flywheel from the RS installed by Champion and this may have something to due with the dyno results. Bottom line is that I'm totally satisfied with the money I spent. The is much more responsive and it sounds like a C-GT with straight pipes. Gentlemen you chose how you want to spend your money. To me it was worth it. GT3Ranger A brother in motorsports.

 

I'm guessing here, but are the mid range gains of 40lbs and 45rwhp versus the "stock" setting and not the "sport" setting? I say this as we dynoed the car in both settings, and like porsche states and shows in the owners manuel, "sport mode" improves the midrange hp and tq by approx 20hp/tq. thus are your gains, as I suspect basically 20-25whp/tq across most of the "sports" mode curve?

thanks

Paul

 

I have never heard about the front wheels not turning being an issue that would lower power on the dyno - I can say that the front wheels not turning causes the ECU to fire a check engine light after 2-3 dyno pulls - both AWE and I spoke about this and if anyone is going to dyno their car you should know this in advance because you will want to have access to software to delete the code afterwards. That said, I think the issue you may be referring to is the "ram air affect" that the car's air box design uses to get a hp/tq boost at higher speeds.


Paul

 

Hey 997 GT3north, your car dyno'rd stock at 379 rwHP? Man that is strong ! I compliment you on a killer car out of the box. My car dyno'ed ay 360 rwHP stock. As said the significant gains were in the mid-range but the gragh tapers at 8000 rpm to 25 - 26 hp with the software. Frankly I feel software is alot of hocus pocus in normally aspirated cars.

 

As my car and the AWE car almost dynoed exactly the same, I would assume your car in the stock form would have done the same on either the AWE dyno or the EPL dyno - even if Champion has the same Mustang dyno?, they would have to have put in the same variables that AWE and EPL used or the results would have been different (this actually required both AWE and EPL to take a very experienced guess at the time when I dynoed my car because the manufacturer of the Mustang dyno didn't have the required inputs for the new 997gt3 as the car had just come out)

I have learned over the years that different dynoes can produce very different outputs for the same car and therefore just stick to one type to compare before and after results.

What type of dyno was used?
Was the before and after results stock versus tuned or sport versus tuned?