Please Sir, may I have some more? - COBB Tune
08-23-2018, 12:24 AM
#17
Rennlist Member
Thread Starter
The Akra's are 300cell also while the others are 200.. If you went Kline you could do 100cell race cats also. I tried going catless, but I DD my car.. I didn't like the odor in traffic with the windows down.
BTW.. you could probably still beat him in a 1/4 mile drag.. he's just got more power than you.. for now!
BTW.. you could probably still beat him in a 1/4 mile drag.. he's just got more power than you.. for now!
We need to get all the COBB Stage 1 guys together and show sad faces : (( to COBB for the early release of Stage 2. Hahahaha. Do you think that would help?
08-23-2018, 01:18 AM
#18
Have a GTS, showed 19 before and 19 psi after ( but datalogging after showed a calculated 24 psi peak).
I have to datalog the stock tune to compare the changes.
I think the tune keeps the system happy by only continuing to show stock guage values.....
I have to datalog the stock tune to compare the changes.
I think the tune keeps the system happy by only continuing to show stock guage values.....
08-23-2018, 01:35 AM
#19
Rennlist Member
Thread Starter
Ok, I haven't had a chance to play to much with the AP yet. I had asked the dyno guy what it was, and he said something about, very conservative and ramped up to 16.
08-23-2018, 01:47 AM
#20
Rennlist Member
Your stock cats are exhaust is probably restricting by about 20-30rwhp. He's tuned to the gills, youre basically running a stock car on stg.1 canned tune.
Your IC's aren't providing any real benefit yet and the IPD plenum is also only offering marginally more tq under the curve. Put some AWE, Speedtech or Fabspeed cats on there. They all have the larger core sections.. Soul's are nice and at a great point, but your setup is going to be as aggressive as you can get and you might as well go for the extra diameter cat.
The Akra's are 300cell also while the others are 200.. If you went Kline you could do 100cell race cats also. I tried going catless, but I DD my car.. I didn't like the odor in traffic with the windows down.
BTW.. you could probably still beat him in a 1/4 mile drag.. he's just got more power than you.. for now!
Your IC's aren't providing any real benefit yet and the IPD plenum is also only offering marginally more tq under the curve. Put some AWE, Speedtech or Fabspeed cats on there. They all have the larger core sections.. Soul's are nice and at a great point, but your setup is going to be as aggressive as you can get and you might as well go for the extra diameter cat.
The Akra's are 300cell also while the others are 200.. If you went Kline you could do 100cell race cats also. I tried going catless, but I DD my car.. I didn't like the odor in traffic with the windows down.
BTW.. you could probably still beat him in a 1/4 mile drag.. he's just got more power than you.. for now!
08-23-2018, 08:46 AM
#22
Burning Brakes
I believe the Porsche instruments never show more than the stock, sea-level peak boost. On my C2 base car in Denver, Torque says my turbos develop 16 psi of boost, instead of the stock 13, to compensate for the thinner air, but the boost gauge only shows 13.
08-23-2018, 11:13 AM
#23
08-23-2018, 11:24 AM
#24
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In most of the cars we are maxing the boost gauge on the dash out. So it is a bit misleading.
You can always use the AP to measure actual boost. Look for a parameter called Pressure Up Throttle and that will be an absolute number of boost. To get gauge simply subtract your ambient pressure. ( Sea level folks around 14.7, Colorado folks somewhere in the 12.5ish range depending on where you are in Colorado)
Hope that helps.
-Mitch
You can always use the AP to measure actual boost. Look for a parameter called Pressure Up Throttle and that will be an absolute number of boost. To get gauge simply subtract your ambient pressure. ( Sea level folks around 14.7, Colorado folks somewhere in the 12.5ish range depending on where you are in Colorado)
Hope that helps.
-Mitch
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08-23-2018, 07:11 PM
#25
Do you have anymore info on this?
I looked this up when I was first looking into sport cats.
From what I was able to find out, the Fabspeed, AWE, and Speedtech cats are all 5.5" if I recall correctly, but the serial numbers were all slightly different, so there was some difference but I could decode it not knowing HJS's system. Soul was the only one that used a 5" core (again, I know it was smaller, but forget the actual dimension)
I looked this up when I was first looking into sport cats.
From what I was able to find out, the Fabspeed, AWE, and Speedtech cats are all 5.5" if I recall correctly, but the serial numbers were all slightly different, so there was some difference but I could decode it not knowing HJS's system. Soul was the only one that used a 5" core (again, I know it was smaller, but forget the actual dimension)
08-23-2018, 09:29 PM
#26
Well Soul is a 120 mm diameter HJS core and I heard some of the others are 130 mm cores.
Biggest reason Soul is cheaper.
I ended up buying Soul cat and so far I am very happy with it.
Biggest reason Soul is cheaper.
I ended up buying Soul cat and so far I am very happy with it.
08-25-2018, 12:10 AM
#27
08-25-2018, 04:49 AM
#28
Rennlist Member
Thread Starter
I did a bit of digging also. Yes they all use HJS's However that is like saying we all have Porsche's.
Some have Boxsters, Caymans, and some have 911 GT3-RS. Akra is the only one of the bunch that use the top of the line HJS's. The others use the lower spec range.
Akra is also 300 cell, But what would be interesting to know is, does the top of the line 300 cell operate better than the lower spec 200 cell? That is the $1,200 question.
I've had Akra before, and have tested their products and they always deliver what they promise. So I will get the Akra. I also don't want to be too loud, as some of the tracks will boot you.
Some have Boxsters, Caymans, and some have 911 GT3-RS. Akra is the only one of the bunch that use the top of the line HJS's. The others use the lower spec range.
Akra is also 300 cell, But what would be interesting to know is, does the top of the line 300 cell operate better than the lower spec 200 cell? That is the $1,200 question.
I've had Akra before, and have tested their products and they always deliver what they promise. So I will get the Akra. I also don't want to be too loud, as some of the tracks will boot you.
Last edited by 4 Point 0; 08-25-2018 at 05:59 AM.
08-25-2018, 12:20 PM
#29
Well a 300 cell cat will be better for emissions and slightly more restrictive than a 200 cell cat (OEM is 600).
08-25-2018, 01:09 PM
#30
Three Wheelin'
200 cells have been known to throw a CE light. Even though you could clear it with the tune, I was worried if it went it to dealer and I uninstalled tune and restored to stock that the 200 cell would trigger the sensor and get them looking further into the car, which I didnt want to deal with. I dont think the difference in performance from 300 cell to 200 cell would be that meaningful regardless..