My 99 C2 VF supercharged dyno #'s are in
Registered User
Joined: Dec 2003
Posts: 349
From: Jacksonville
Rep Power: 39
*update*....The shop pulled my exhaust apart and found that I blew apart the catalytic converters and pieces of them were stuck on the o2 sensors causing them to malfunction. They put new exhaust pipe in to replace the catalytic converters and put it on the dyno....
On the dyno it made 5.9lbs of boost and put out 351rwhp(SAE corrected) which I'm thrilled with! Maybe it may make even a bit more after they clean the rest of the exhaust out(I believe they told me the mufflers got clogged with catalytic converter material as well) so may even free up a few more hp.
The car a few weeks ago put down 333rwhp and I wasnt too thrilled with that, so I'm definitely a bit more happy now. I'll know more tomorrow as they're going to re-dyno it with a new air K&N air filter(one currently on car is 5 years old and very very clogged) and the new 02 sensors(which will hopefully make the car run smooth
)
351rwhp with a 20% drivetrain loss nets me right at 420bhp...and thats exactly what VF rates their kits at for the 99-01 porsches, so I must say I'm very happy!
next step is to install my spec stage 2 clutch and a Aasco lightwight aluminum flywheel(13lbs lighter than stock) and see what the car does then power wise!
On the dyno it made 5.9lbs of boost and put out 351rwhp(SAE corrected) which I'm thrilled with! Maybe it may make even a bit more after they clean the rest of the exhaust out(I believe they told me the mufflers got clogged with catalytic converter material as well) so may even free up a few more hp.
The car a few weeks ago put down 333rwhp and I wasnt too thrilled with that, so I'm definitely a bit more happy now. I'll know more tomorrow as they're going to re-dyno it with a new air K&N air filter(one currently on car is 5 years old and very very clogged) and the new 02 sensors(which will hopefully make the car run smooth
)351rwhp with a 20% drivetrain loss nets me right at 420bhp...and thats exactly what VF rates their kits at for the 99-01 porsches, so I must say I'm very happy!
next step is to install my spec stage 2 clutch and a Aasco lightwight aluminum flywheel(13lbs lighter than stock) and see what the car does then power wise!
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Glad everything turned out well for you. It is strange, though, that there was no MIL on (ck engine light) and no fault codes. If you had failed cats and ultimately oxygen sensors damaged/coated with debris you should have been getting catalytic converter inefficiency faults, O2 sensor faults and maybe even fuel trim faults. I am curious, were there faults present but no MIL on or were there no faults whatsoever? Sometimes the MIL bulb burns out which would account for codes with out the light. When you turn your ignition on (key on, engine off) does the Ck engine light illuminate? It should always come on with ignition on and then go out when the car is started.
He's got a 99. My bet is that all CEL's have been disabled in programing.
Registered User
Joined: Dec 2003
Posts: 349
From: Jacksonville
Rep Power: 39
If his MIL bulb is inop though, that would be logical to have some problems and not know until the car is running poorly or down on power. That's one of the nice things about having operational MIL and proper software- you always know when you have a problem.
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
That would seem unlikely since VF uses GIAC for all of their programming and i can't remember a situation where GIAC has ever disabled any fault recognition in their code for any of their applications, supercharged or otherwise. I could be wrong and i have seen some strange things but from my experience that should be accurate.
If his MIL bulb is inop though, that would be logical to have some problems and not know until the car is running poorly or down on power. That's one of the nice things about having operational MIL and proper software- you always know when you have a problem.
If his MIL bulb is inop though, that would be logical to have some problems and not know until the car is running poorly or down on power. That's one of the nice things about having operational MIL and proper software- you always know when you have a problem.
Absolutely they have. OP should see if SAI turns on when cold. If not, CEL system disabled. Or disconnect a coil pack, or O2 sensor. Bulb can be tested by turning ignition to ON.
Registered User
Joined: Dec 2003
Posts: 349
From: Jacksonville
Rep Power: 39
When you say "absolutely they have", do you mean VF/GIAC has disabled OBD/MIL system for recognizing emissions relavant faults on a road-going car? Or did you mean something else?
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Registered User
Joined: Dec 2003
Posts: 349
From: Jacksonville
Rep Power: 39
That is very true. There is a huge fine and potentially jail time for disabling OBD2/3 hardware or software in the US. I know with certainty that GIAC will not make such changes to the DME unless it is for certain foreign markets and those foreign market flash files can't be flashed to US cars even if you wanted to as the DME numbers are different. I don't know about other companies however. That may go on with other vendors but VERY sketchy imo.
Thread Starter
|
Banned
Joined: Aug 2009
Posts: 119
From: De Pere, Wisconsin
Rep Power: 21
When I get the car back from the shop today I'll test to see if the CEL becomes illuminated during the key position "on" and report back to you guys. I'm also not aware if VF disables the CEL, I dont know why they would do that, as if they did, I have to now find out the hard way on how to fix something if my car is acting up.
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
I figured it would be. Have you ever had the car inspected for State emissions? A scanner would show any systems that are not in ready state.
Last edited by 1999Porsche911; Oct 22, 2009 at 07:18 PM.
Thread Starter
|
Banned
Joined: Aug 2009
Posts: 119
From: De Pere, Wisconsin
Rep Power: 21
Another *UPDATE* finally got the dyno graph for everybody to see. The car is now running 100% perfect with no hesitations so that's good and I'm happy about that...HOWEVER....
AFTER LOOKING AT THIS dyno graph I AM VERY UNHAPPY with the tuning software GIAC gave to VF for these cars. I know they're trying to keep things "out of warranty" but this is a BIT ridiculous.
9.5-10.3 air/fuel ratio through the ENTIRE powerband? COME ON.......The car isn't even making barely 5lbs of boost until over 6500rpm...and makes a lowsy 2-3 lbs up until 5k basically....so I have a lowsy 350 rpmp's where I can use a full 5lbs....
Not happening....I'm having my shop make me a smaller pulley and they're also making a deal with GIAC right now where my tuner will reflash my ecu and make it ~11.5 air/fuel ratio like it should be. There is no point for the car to be in the 9's on air/fuel at 3000rpm! What a joke, now I see how they keep these things out of warranty.
Were going to up the boost to 8lbs and change the air fuel into the mid 11's and re-dyno it sometime next week. I bet this thing picks up 60-80hp LIKE IT SHOULD be running. Shame on VF, very disappointed in this ecu flash!
Here is the graph
AFTER LOOKING AT THIS dyno graph I AM VERY UNHAPPY with the tuning software GIAC gave to VF for these cars. I know they're trying to keep things "out of warranty" but this is a BIT ridiculous.
9.5-10.3 air/fuel ratio through the ENTIRE powerband? COME ON.......The car isn't even making barely 5lbs of boost until over 6500rpm...and makes a lowsy 2-3 lbs up until 5k basically....so I have a lowsy 350 rpmp's where I can use a full 5lbs....
Not happening....I'm having my shop make me a smaller pulley and they're also making a deal with GIAC right now where my tuner will reflash my ecu and make it ~11.5 air/fuel ratio like it should be. There is no point for the car to be in the 9's on air/fuel at 3000rpm! What a joke, now I see how they keep these things out of warranty.
Were going to up the boost to 8lbs and change the air fuel into the mid 11's and re-dyno it sometime next week. I bet this thing picks up 60-80hp LIKE IT SHOULD be running. Shame on VF, very disappointed in this ecu flash!
Here is the graph
Last edited by brandongt3; Oct 23, 2009 at 02:09 PM.
Registered User
Joined: Aug 2004
Posts: 2,134
From: Chicagoland
Rep Power: 123
Another *UPDATE* finally got the dyno graph for everybody to see. The car is now running 100% perfect with no hesitations so that's good and I'm happy about that...HOWEVER....
AFTER LOOKING AT THIS dyno graph I AM VERY UNHAPPY with the tuning software GIAC gave to VF for these cars. I know they're trying to keep things "out of warranty" but this is a BIT ridiculous.
9.5-10.3 air/fuel ratio through the ENTIRE powerband? COME ON.......The car isn't even making barely 5lbs of boost until over 6500rpm...and makes a lowsy 2-3 lbs up until 5k basically....so I have a lowsy 350 rpmp's where I can use a full 5lbs....
Not happening....I'm having my shop make me a smaller pulley and they're also making a deal with GIAC right now where my tuner will reflash my ecu and make it ~11.5 air/fuel ratio like it should be. There is no point for the car to be in the 9's on air/fuel at 3000rpm! What a joke, now I see how they keep these things out of warranty.
Were going to up the boost to 8lbs and change the air fuel into the mid 11's and re-dyno it sometime next week. I bet this thing picks up 60-80hp LIKE IT SHOULD be running. Shame on VF, very disappointed in this ecu flash!
Here is the graph
AFTER LOOKING AT THIS dyno graph I AM VERY UNHAPPY with the tuning software GIAC gave to VF for these cars. I know they're trying to keep things "out of warranty" but this is a BIT ridiculous.
9.5-10.3 air/fuel ratio through the ENTIRE powerband? COME ON.......The car isn't even making barely 5lbs of boost until over 6500rpm...and makes a lowsy 2-3 lbs up until 5k basically....so I have a lowsy 350 rpmp's where I can use a full 5lbs....
Not happening....I'm having my shop make me a smaller pulley and they're also making a deal with GIAC right now where my tuner will reflash my ecu and make it ~11.5 air/fuel ratio like it should be. There is no point for the car to be in the 9's on air/fuel at 3000rpm! What a joke, now I see how they keep these things out of warranty.
Were going to up the boost to 8lbs and change the air fuel into the mid 11's and re-dyno it sometime next week. I bet this thing picks up 60-80hp LIKE IT SHOULD be running. Shame on VF, very disappointed in this ecu flash!
Here is the graph
VF's programing is NOT 10.5:1. Either there is a problem with your setup or the a/f gauge used is incorrect. Take your scanner and look at the after cat O3 sensors at WOT near readline. Let me know what voltage they read. Changing your pulley size will not change your a/f ratio enough to matter.
You should learn the story before starting to blame others for your problems.
Last edited by 1999Porsche911; Oct 23, 2009 at 03:52 PM.
Registered User
Joined: Dec 2003
Posts: 349
From: Jacksonville
Rep Power: 39
VF's programing is NOT 10.5:1. Either there is a problem with your setup or the a/f gauge used is incorrect. Take your scanner and look at the after cat O3 sensors at WOT near readline. Let me know what voltage they read. Changing your pulley size will not change your a/f ratio enough to matter.
You should learn the story before starting to blame others for your problems.
You should learn the story before starting to blame others for your problems.
That said, the software is rarely an issue. Once its flashed it doesn't change unless the ecu is trying to compensate for a real or percieved problem. I would like to have seen the TRA and FRA numbers as well as the MAF readings and crank case vac numbers before seeing a negative post towards VF and GIAC. With those real time numbers i could easily tell what the motor is doing percisely and if there is a mechanical problem still present**