DupaHead

http://www.vividracing.com/catalog/s...5-p-25303.html

Hany any of you guys seen this? The claim in 30hp and over 20ft/lbs on the 6/GT3. Is that even possible?

Is it safe to do this kind of mod to our beloved GT3s?

Carnerd

Is that whp or bhp? Softronic is good stuff but 30 hp (brake or wheel) is pretty insane. I recall Manthey was only able to get around 30hp with their full exhaust system and ECU tuning.

PK996C2

I suspect Scott made a typo and meant to state 380 stock HP on his website. Either that or he is consciously referring to the Mk I GT3 in which case his website omits the MK II, ie the 2004-5 car. I sent him an email asking him to clarify.

Carnerd

Any updates...?

DanH

Did anyone ever find out? Chap claiming 55bhp on a cayman S with a new backbox + induction + softronic. I'm skeptical...

Mr Michael B

I watched a before & after GIAC chip flash on a Mustang AWD dyno with a 2004 GT3. I recall 12-14 HP at the wheels with no other changes. I think that would be about all you could expect - but would be thrilled to hear otherwise.

va122

Ok that's a load of horse ****. I got +35 to the wheels with the full cargraphic 410 kit (same as manthey) Manifold back and 9k $. And GIAC told me that all they get is 9whp for 1k. My friend did header and cat bypasses and he has like 10 more Whp then me. All our cars are underrated. For ecample read about the 997 GT3s from Farbacher with 450 bhp and they said that it coudn't pull away from a 6-GT3 on the straights. I've seen 6-GT3s put out 365whp bone stock.

Maybe the mk1. I don't know about that. But the primaries is where the most power comes from. Careful though, i have a friend that races a mk1 and he said the stock headers made more power then the s-car go headers.

Hank Cohn

I had an opportunity at Road Atlanta to have my car’s ECU flashed by a very reputable vendor. I also have Traqmate Data acquisition, and, as such, got a chance to see the difference on track -- there was none. Not one mile per hour difference at the end of the ¾ mile long back straight.

This was a back-to-back test in one afternoon. Same day. Same conditions. Same car. Same tires. Same driver. The technician rode along with me and made some modifications to the fuel table while we tried to get more out of it. There was nothing to get.

The technician asserts and I agree that it’s possible that there is little to no HP “left on the table” at WOT. There is perhaps more HP to unlock in the midrange but that doesn’t come in to play much at the track. I had the flash reversed.

It was a very interesting test and answered a lot of questions I’ve had for a while about performance chips/ECH flashes at the track. I’m not really concerned about performance on the street as I only casually drive the car when on public roads. Had it made a difference on the track I would have purchased the flash.

To be fair about the Farnbacher Loles car Victor (above) mentions, the 997 GT3 S. That was a test before the car was finalized. I too was surprised that it wouldn't pull a 6GT3, especially since the GT3 S was on slicks, but it didn't.

Hank

Leigh2

VA122 I agree...not many cars pull away from a 6GT3. i think that they were underrated as well...

va122

Also one must consider the "fuzzy logic" of our ecu and it's ability to adapt to different conditions like reduced backpressure or more air input, like ram air or a less restrictive filter. I think the dealer shop forman (friend so he's not blowing smoke up my ***) told me it takes 60 duty cycles fro it to adapt.

A lot of these ECU changes also increase the throttle response making it feel faster...

drqiman

I have a 997 GT3. A good friend has the same car except for LWF, ECU flash and bypass from Sharkworks. His car is also about 300 pounds lighter. We have done several pulls in every gear except first. In every instance he will slowly pull away 1-2 car lengths before we have to slow down. Either my car is slow or his is faster. However, we never tried this before he did the mods.

Yargk

ummm.

va122

statistically impossible comparison. 300lb reduction is like him having another hundred or so horsepower. If he really has that much weight taken off he would walk away from you like you have your parking brake on .

Mr Michael B

Victor... If I am not mistaken a 100 lbs works out to be one tenth of a second acceleration penalty in say accelerating the 1/4 mile... So 300 lbs would be about three tenths. Now 100 HP works out to be nearly a second advantage when accelerating the 1/4 mile and would statistically be quite an advantage in comparison with just 300 lbs.

In other words - for performance I would take 100 more HP over a 300 lbs weight reduction anytime. Its not as huge of a differential as your stating - but I get what your saying.

va122

it was off the top of my head, clearly my math sucks.

Thanks MB