Cobb AP impressions and dynos
05-23-2008, 12:11 PM
#101
The Local Idiot
Join Date: May 2008
Location: Big D, Texas
Posts: 406
Likes: 0
Received 0 Likes
on
0 Posts
Just got my AP yesterday, and thought I'd post my initial impressions.
Cobb's hardware leaves a little to be desired IMO. It's kind of cheap for how much you're paying for it... granted they did the R&D to make all this stuff work the the RX8's PCM, including RX8 specific settings, and that's not a small task. I had a problem getting my AP talking with the PCM... at first it wouldn't communicate at all. Unplugging the OBD-II connector and then plugging it back in fixed it, but it's VERY sensitive, and still losses communication sometimes. Wiggling the connector sometimes does the trick... I've heard other people have this problem with the AP's OBD-II connector as well.
After I got the stupid thing installed, it was pretty much smooth sailing. I ended up on MM's "1a" flash, and after about a hundred miles or so (I have long commute
) the LTFT is at 0, and my AFRs seem to be right on target (although I haven't logged them and done an in depth analysis yet). I'm pretty happy with the way it runs on the new flash. This is pretty subjective, but it feels a lot smoother, especially in the lower RPM range, and also when the extra intake ports open up at higher RPM--I used to really feel the little hiccups in the torque when this happened before the flash. Overall I doubt the gains are significant, but it does improve the drivability (again, totally subjective). Added bonus is the fans turning on earlier... just in time for the Texas summer months too 
Overall, I'm very satisfied. I would say that if you're on a tight budget to maybe pass this by, but if you've got some spare cash to throw around then go for it... as long as you don't have ridiculous expectations about the performance gains.
Major props have to go out to MazdaManiac for all the hard work he's put in creating the flashes for all of us. He could (read: should) have charged more money to get the AP from him with these included. Bravo sir... the second half or your handle is certainly apt
Cobb's hardware leaves a little to be desired IMO. It's kind of cheap for how much you're paying for it... granted they did the R&D to make all this stuff work the the RX8's PCM, including RX8 specific settings, and that's not a small task. I had a problem getting my AP talking with the PCM... at first it wouldn't communicate at all. Unplugging the OBD-II connector and then plugging it back in fixed it, but it's VERY sensitive, and still losses communication sometimes. Wiggling the connector sometimes does the trick... I've heard other people have this problem with the AP's OBD-II connector as well.
After I got the stupid thing installed, it was pretty much smooth sailing. I ended up on MM's "1a" flash, and after about a hundred miles or so (I have long commute
) the LTFT is at 0, and my AFRs seem to be right on target (although I haven't logged them and done an in depth analysis yet). I'm pretty happy with the way it runs on the new flash. This is pretty subjective, but it feels a lot smoother, especially in the lower RPM range, and also when the extra intake ports open up at higher RPM--I used to really feel the little hiccups in the torque when this happened before the flash. Overall I doubt the gains are significant, but it does improve the drivability (again, totally subjective). Added bonus is the fans turning on earlier... just in time for the Texas summer months too Overall, I'm very satisfied. I would say that if you're on a tight budget to maybe pass this by, but if you've got some spare cash to throw around then go for it... as long as you don't have ridiculous expectations about the performance gains.
Major props have to go out to MazdaManiac for all the hard work he's put in creating the flashes for all of us. He could (read: should) have charged more money to get the AP from him with these included. Bravo sir... the second half or your handle is certainly apt
05-30-2008, 09:46 PM
#104
Rotary Powered Decepticon
I just got the Cobb AP from MM today. The "start" file feels pretty good (only had a 10km drive home). Already, the car felt like it had a bit more pep and response in the lower RPMs. I got to drive it on the highway for a bit and the butt dyno said that there was "an increase in awesomeness".
My favorite read out screen so far is the "Mileage". I know from a previous post that the mileage calculation from the AP is off but for some reason I love seeing 26MPG on the screen Ha ha ... one can only dream.
I'm off to go drive around and to look at my STFT and AFRs again. Weee!
My favorite read out screen so far is the "Mileage". I know from a previous post that the mileage calculation from the AP is off but for some reason I love seeing 26MPG on the screen
Ha ha ... one can only dream.I'm off to go drive around and to look at my STFT and AFRs again. Weee!
Last edited by BlueFrenzy; 05-30-2008 at 09:49 PM.
05-30-2008, 11:08 PM
#107
just want to point out to all he dumb@sses who think running without a cat converter is cool that the car was emissions legal
you can read the whole modding thread in the competition area titled "Some Goodies Arrived Today"
https://www.rx8club.com/rx-8-racing-25/some-goodies-arrived-today-86994/
you can read the whole modding thread in the competition area titled "Some Goodies Arrived Today"
https://www.rx8club.com/rx-8-racing-25/some-goodies-arrived-today-86994/
06-18-2008, 07:41 PM
#109
There are dynos all over the site.
Just none posted here.
Check the various local dyno threads.
There seem to be a lot of Mustang dynos out there, which make owners sad (with stock numbers in the 140 range at times).
But the AP generally pulls about 7 - 15 HP out of an otherwise stock car.
Deleting the CAT and using the AP produces the biggest results.
I've gotten several cars with no CAT, exhaust and intake into the 220 range.
Just none posted here.
Check the various local dyno threads.
There seem to be a lot of Mustang dynos out there, which make owners sad (with stock numbers in the 140 range at times).
But the AP generally pulls about 7 - 15 HP out of an otherwise stock car.
Deleting the CAT and using the AP produces the biggest results.
I've gotten several cars with no CAT, exhaust and intake into the 220 range.
06-29-2008, 03:25 PM
#116
Rotary wanabee
iTrader: (1)
Join Date: Jul 2007
Location: Long Island, NY
Posts: 1,978
Likes: 0
Received 0 Likes
on
0 Posts
cobb -- 730
hks intake 500
High flow cat 250
total 1408.00
some how 1,408 dollars should give me more than 12.3 whp
enzo set up the dyno at no limit motorsport so they read the same.
any thaughts?
hks intake 500
High flow cat 250
total 1408.00
some how 1,408 dollars should give me more than 12.3 whp
enzo set up the dyno at no limit motorsport so they read the same.
any thaughts?
06-29-2008, 03:35 PM
#117
First, those dollars gave you a bunch more things than just power.
Second, people spend $5k to see ~50 HP with base turbo kits.
Third, I've seen people with that intake lose power rather than gain it.
Fourth, you don't specify the ambient conditions in those dynos.
1" of mercury on the baro, 15°F on the thermo or 30% relative humidity difference could be more than 10HP either way on an N/A car.
You haven't ruled out any mechanical issues with the car and you haven't verified that the calibration you are running on the AccessPORT is correctly tuned for your setup with AFR readings.
06-29-2008, 03:35 PM
#118
Registered
Just think of how quickly you'll make that money back with increased fuel economy.
06-29-2008, 08:54 PM
#119
Rotary wanabee
iTrader: (1)
Join Date: Jul 2007
Location: Long Island, NY
Posts: 1,978
Likes: 0
Received 0 Likes
on
0 Posts
my issue is not on the gains... but the gains post cobb instaul.... the car seamed a bit odd after the cobb map... 1. i need a custom mm map... or 2. i just have the wrong map on...
as for conditions...
82 F, hum. 23%
my dyno curve does not look normal no matter how you look at it.
as for conditions...
82 F, hum. 23%
my dyno curve does not look normal no matter how you look at it.
Thread
Thread Starter
Forum
Replies
Last Post
05rx8mazda
RX-8 Parts For Sale/Wanted
18
11-28-2015 09:42 AM
