991.2 Cobb Accessport, post your results
04-05-2020, 09:02 AM
#346
I agree World puts out some optimistic numbers. Dyno's are for tuning and documenting mod improvements.
With that in mind, Mitch has my car with mods putting out 107whp (taking in account your 10% correction) more than a stock GTS, or 157 corrected whp more than a base. All same dyno minus 10% on 91oct.
What we really need are some roll race numbers (60-130) and 1/4 mile traps. Mine are real close to a 991.2 Turbo S
And the 600LT on the straights yesterday (track map).
With that in mind, Mitch has my car with mods putting out 107whp (taking in account your 10% correction) more than a stock GTS, or 157 corrected whp more than a base. All same dyno minus 10% on 91oct.
What we really need are some roll race numbers (60-130) and 1/4 mile traps. Mine are real close to a 991.2 Turbo S
And the 600LT on the straights yesterday (track map).
04-05-2020, 01:57 PM
#347
https://rennlist.com/forums/991/1077...l#post16256026
05-03-2020, 07:04 PM
#348
Advanced
My car went in to the dealer for a checkup a few weeks ago, so I had “unloaded” the Cobb tune on my C2. I’ve been driving it around without the tune ever since. I loaded it back (Stage 1 93) earlier today and just went out for a nice Sunday afternoon, sunny, windows down drive. Man, the Cobb tune really makes the car a load of fun to drive. Without the tune it is fun, but with the tune it is REALLY fun. I’m not sure what the difference between stock and tune feels like on an S or GTS, but it makes a world of difference on the C2 (and, I would guess, the T). Highly recommended.
05-04-2020, 09:32 AM
#349
Rennlist Member
Update!
I flashed stage 2 93 on my car earlier last week (Stock cats, X-Pipe, stock filter).
Car has around 150 miles on it since flashing; a lot more power than stock. No issues with drivability. I have been driving hard to set adaptations correctly post flash, seems to be handling stage 2 just fine.
I have baseline dragy (0-60 and 60-130) figures ready to go. I will be post a comparison to stage 2 figures once I get a chance to collect some data.
I flashed stage 2 93 on my car earlier last week (Stock cats, X-Pipe, stock filter).
Car has around 150 miles on it since flashing; a lot more power than stock. No issues with drivability. I have been driving hard to set adaptations correctly post flash, seems to be handling stage 2 just fine.
I have baseline dragy (0-60 and 60-130) figures ready to go. I will be post a comparison to stage 2 figures once I get a chance to collect some data.
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NightBlueTTS (05-04-2020)
05-04-2020, 03:26 PM
#351
05-04-2020, 03:28 PM
#352
Rennlist Member
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The Ox (05-04-2020)
05-04-2020, 06:47 PM
#354
Burning Brakes
I finally have my GTS dialed in the way I like it. I have a semi custom COBB stage 2 and PDK tune...semi custom meaning tweaked by the kind folks at COBB through providing them a few data logs. The PDK tune is a nice complement to the ECU tune IMO. My other mods include high flow cats, headers, and BMC air filter. I also use an octane booster from BND Automotive which I’ve been using for a while on other cars. My GTS has transformed into a 2 pronged beast on steroids. I could not be happier.
05-09-2020, 05:29 PM
#355
I've been running Cobb stage 1 93 on my 17' C2 w/PDK and Soul exhaust, stock cats. Put about 600 miles on the tune so far. Really enjoying it, there's a lot more turbo acceleration but I still swear there's more lag as I dip into the throttle than stock. Whatever. Question: anyone use VP Racing's "Maddative Octanium Unleaded" octane booster WITH their Cobb tune? It supposedly raises the octane by 7 numbers (so 100 if you run 93 from the pump). Does that require a new map from the Cobb AP? Also, there's some rumors on the internet about racing gas sitting in your fuel tank (when your car is not in use for a while) causing damage to parts of your fuel line and system - is that just for the pure race gas 102 stuff or does it include octane-boosted gas as well?
05-09-2020, 05:57 PM
#357
I've been running Cobb stage 1 93 on my 17' C2 w/PDK and Soul exhaust, stock cats. Put about 600 miles on the tune so far. Really enjoying it, there's a lot more turbo acceleration but I still swear there's more lag as I dip into the throttle than stock. Whatever. Question: anyone use VP Racing's "Maddative Octanium Unleaded" octane booster WITH their Cobb tune? It supposedly raises the octane by 7 numbers (so 100 if you run 93 from the pump). Does that require a new map from the Cobb AP? Also, there's some rumors on the internet about racing gas sitting in your fuel tank (when your car is not in use for a while) causing damage to parts of your fuel line and system - is that just for the pure race gas 102 stuff or does it include octane-boosted gas as well?
I think it will take you from 93 to 93.7.
Seriously.
Use something toxic but effective like toluene.
05-09-2020, 06:11 PM
#358
Not sure you are correct - Octanium is good for 70 points or about 7 octane numbers up. According to Cobb's own website which I just read for the past 20 minutes, they claim it's fine to use higher octane than the map level you have, but not the other way around. Also, Cobb notes to use race gas octane of about 2 gallons at track events to help with the added heat. From what I've read across the web lately, higher race level octane is generally better all-around, but, then again some experienced track guys said they remove the gas from their tank after the track event. Looking for intelligent data and perspective on this rather than "hey dude skip the octane stuff man" replies.