MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
09-13-2015, 05:20 PM
#16
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Originally Posted by wrs
This is, I think, the most important point. If GIAC doesn't recognize that there are headers on the car, it may degrade the performance.Well they are also designed to work with the stock ECU and FVD documents that on their website.Fair enough, you definitely don't want the headers if they conflict with other mods on the car. However, maybe GIAC has a mod to your tune for headers? Don't they have different maps for different configurations? I believe Cobb does. I am planning on getting over to Cobb sometime in the near future and talk to them about taking out my FVD module and putting on their tune. However, I am going to want to know if they need to customize a tune for my exhaust and headers.
One thing that I like about the FVD piggyback is that it senses the change in fuel without having to do anything and I get significantly better results at the drag strip when I add 104 to my 93. At COTA they now offer 101 and I ran on a mix of 101 and 93 as well as on the last run, 101 only. Unfortunately all I have for measuring the performance is overall lap times because my Vbox was unusable due to me misplacing the suction cups. The lap times are not a good measure of any difference made by the race gas.
I upgraded my phone on Friday to the Note 4. I am planning on getting Harry's lap timer and an OBD data collection module that has wifi. The Lap Timer product can manage a GoPro, take HD video through the phone, pull in the OBD data and integrate all of it in finished videos as well as giving me speeds at any point on the track. I won't need the Vbox anymore at the track but will still need it for 1/4 timing.
One thing that I like about the FVD piggyback is that it senses the change in fuel without having to do anything and I get significantly better results at the drag strip when I add 104 to my 93. At COTA they now offer 101 and I ran on a mix of 101 and 93 as well as on the last run, 101 only. Unfortunately all I have for measuring the performance is overall lap times because my Vbox was unusable due to me misplacing the suction cups. The lap times are not a good measure of any difference made by the race gas.
I upgraded my phone on Friday to the Note 4. I am planning on getting Harry's lap timer and an OBD data collection module that has wifi. The Lap Timer product can manage a GoPro, take HD video through the phone, pull in the OBD data and integrate all of it in finished videos as well as giving me speeds at any point on the track. I won't need the Vbox anymore at the track but will still need it for 1/4 timing.
09-14-2015, 03:37 PM
#17
Those fvd headers have been proven to be clearly a problem and no amount of tuning is ever going to correct the core issue there. I mean logically how could it? There is just so much BS with a lot of this stuff - best accept the fact and move on. That graph on 6 says it all.
09-14-2015, 04:29 PM
#18
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Here is the dyno graph of my car with GIAC Stage 2 and stock intercoolers vs as further modified with Champion intercoolers and GiAC stage 2 plus
09-14-2015, 04:40 PM
#19
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Here is the dyno graph of my car with the FVD headers and with stock headers. In both dyno pulls the car has the champion intercoolers and GIAC stage 2 plus, Europipe exhaust, IPD plenum, BMC filter and Champion race diverted valves. In both pulls the car is running pump gas at 93 octane.
09-15-2015, 04:49 AM
#20
Here is the dyno graph of my car with the FVD headers and with stock headers. In both dyno pulls the car has the champion intercoolers and GIAC stage 2 plus, Europipe exhaust, IPD plenum, BMC filter and Champion race diverted valves. In both pulls the car is running pump gas at 93 octane.
09-15-2015, 09:50 AM
#22
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Interesting dyno. Not what I expected. I would have expected yours to put down 560-565 wheel hp on pump gas.
Your car, which has the Tubi catless race exhaust, put down less wheel hp on Renntech's Dynojet than my car with the same mods but with a catted Europipe exhaust on Champion's Dynojet. My result was 550 wheel horsepower which is more than yours. I would have expected the opposite result but different dynos can read differently. And I don't know what the conditions were when Renntech did the dyno pull on your car. I wish I could've been there the same day that I don't mind to do a side-by-side comparison.
Your wheel torque number was higher than mine which I would have expected as Champion says my cats cost me 35 lbs ft of wheel torque and 10 wheel hp.
Looking forward to seeing your quarter mile ETs and traps at PBIR once temps drop.
Your car, which has the Tubi catless race exhaust, put down less wheel hp on Renntech's Dynojet than my car with the same mods but with a catted Europipe exhaust on Champion's Dynojet. My result was 550 wheel horsepower which is more than yours. I would have expected the opposite result but different dynos can read differently. And I don't know what the conditions were when Renntech did the dyno pull on your car. I wish I could've been there the same day that I don't mind to do a side-by-side comparison.
Your wheel torque number was higher than mine which I would have expected as Champion says my cats cost me 35 lbs ft of wheel torque and 10 wheel hp.
Looking forward to seeing your quarter mile ETs and traps at PBIR once temps drop.
09-15-2015, 08:48 PM
#23
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
In the end I decided to switch my exhaust to Tubi catless. Should be installed tomorrow. Didn't want to leave 10 wheel hp and 35 wheel torque on the table. Keeping my Europipe if I decide that my neighbors or I cannot live with the extra noise of the Catless. EP is such a great exhaust and so well made. Not an easy decision at all. If I find that I just can't live with the extra noise I will put my EP back on and part out the Tubi catless
09-15-2015, 10:50 PM
#24
Racer
Unless both cars are on the same Dyno at close to the same time, you can't compare one to the other. There could be a world of difference between the two cars, or they could be the same, but you won't know unless you test them together on the same Dyno.
09-15-2015, 11:51 PM
#25
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Originally Posted by FBA
Unless both cars are on the same Dyno at close to the same time, you can't compare one to the other. There could be a world of difference between the two cars, or they could be the same, but you won't know unless you test them together on the same Dyno.
we will be doing dyno pulls with the tubi catless to see the difference.
09-16-2015, 06:15 AM
#26
Racer
Do another few baseline runs just before you swap pipes...your old runs are not likely going to be the same on a different day. This way, you'll have your real gains showing once you swap.
09-16-2015, 08:27 AM
#27
Burning Brakes
Thread Starter
MY 2014 991 TURBO S RECEIVES CHAMPION'S NEW INTERCOOLERS & GIAC STAGE 2 PLUS TUNE!!
Originally Posted by FBA
Do another few baseline runs just before you swap pipes...your old runs are not likely going to be the same on a different day. This way, you'll have your real gains showing once you swap.
09-16-2015, 05:10 PM
#28
Racer
Yes, but atmospheric pressure changes...and that affects the Dyno output as well. They can't control that. Been there done that! 10 HP is very to gain/ lose. Time of day can change that...
09-16-2015, 06:14 PM
#29
Hmm that sounds like an error factor, i.e. a contributor to margin of error. Not much credibility in a 10hp difference plus or minus then.
09-16-2015, 07:55 PM
#30
Burning Brakes
Ok, The truth is the tech that dyno my care did not have a clue how to cool a 911. I drove up from Palm beach in 90 degree heat right on to the dyno.
No AC in shop
Did a couple of runs with only one front fan.
Then additional runs with fans blowing at the side intakes.
After I called Champion, we finally moved fans to rear blowing on inter-coolers, thus, the ones on the graph I posted.
Basically, a waste of time.
Nice new 4 wheeled dyno though at Renntech!
Champion does their test on two wheel dyno with front drive shaft disconnected.
Th truth is the car is running great with the new inter coolers.
No AC in shop
Did a couple of runs with only one front fan.
Then additional runs with fans blowing at the side intakes.
After I called Champion, we finally moved fans to rear blowing on inter-coolers, thus, the ones on the graph I posted.
Basically, a waste of time.
Nice new 4 wheeled dyno though at Renntech!
Champion does their test on two wheel dyno with front drive shaft disconnected.
Th truth is the car is running great with the new inter coolers.