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I am from France and bought one month ago a 996 GT3 3.9 liter by RS Tuning from a Porsche race team owner in Germany, it was his personnal car. Advertised as 460hp.
LWFW, close ratio gearbox (loving it), wevo engine mounts, h&r suspensions and some other good parts (gt3 rs chassis parts).
I love the car, went to dyno and had 430hp, happy with that (or shouldn't I with 3.9 ??).
I am just a little bit confused about the power curve that goes up and down ?
The guy who did it told me he could feel it, i can't.
Already tracked the car and was very happy with it.
What do you think about it ? Is it bad ? How to fix ?
Others precisons that might be helpfull (or not) :
- tyres are 10 years old, worn and slippery (cup 2 ordered)
- transmission bushes need to be replace (worn)
- was a hot day (29.5°c = 85°F)
We really need to know the full extent of the other modifications undertaken, as a straightforward increase in capacity from 3.6 to 3.9 won’t give 460hp.
What modifications were done to the exhaust and intake systems ?
This is the from David from Munich? Why not just asking him? Other option would be, to ask the Schmirler Brothers what to expect from your setup?!
Both are quite helpful when you`re asking friendly...
This is the from David from Munich? Why not just asking him? Other option would be, to ask the Schmirler Brothers what to expect from your setup?!
Both are quite helpful when you`re asking friendly...
Yes, he is very nice and i already asked him a lot. He has seen the dyno sheet but he couldn't help.
I am in good contact with him, may be we'll go on track together one day. He has an aaaaawesooooooome garage. So many fantastic cars.
I would like to solve this later,
Can I let it like that ? No danger ?
No danger as long as the fuelling and ignitions maps are good (which if RS Tuning have done them, they should be perfect) Most don't realise how critical the resonance flaps are, nor that their phasing impacts massively on horsepower and torque.
Dyno runs can be very inconsistent and before betting everything on the current data you have, I would consider getting another run—preferably at some other place.
Dyno runs can be very inconsistent and before betting everything on the current data you have, I would consider getting another run—preferably at some other place.
I asked the dyno guy about how it was reliable and how he was confident. He was pretty sure.
BUT
I totally agree with what you are saying, to me it is clearly a possibility.
Dyno runs are dyno runs....and I don't give credit to the guy.
I already thought to go somewhere else, I think I will.
Plus my tyres were really worn and slippery, maybe it did something (may be not, I have no clue about this)
No danger as long as the fuelling and ignitions maps are good (which if RS Tuning have done them, they should be perfect) Most don't realise how critical the resonance flaps are, nor that their phasing impacts massively on horsepower and torque.
Do our “normal” 996 gt3’s have these critical resonance flaps? Sorry for the dumb question. Never heard of them!
07-06-2019, 10:47 AM
3.9 996 GT3 430hp weird dyno curve
