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Old 04-30-2005, 01:45 AM   #1
CBR600F4
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Default Access Port (Stage 1) - Good for low RPMs?

Hi, I know there are several threads about Access Port vs. ECUTEK, but here I would like to ask some feedback about the AccessPort: does it improve in a noticeable way the (horrible) laziness of the WRX, below 3000-3500 rpms? I'm not really looking to get more peak HPs, but I definitely want my '05 wagon to be more responsive at low rpms.
Sometimes, below 3000rpms, the WRX seems as slow as a Corolla...
Also, if anyone knows any other ways to get low-rpm power and responsivness, I'm open for suggestions (don't want to break the warranty, though).
Thanks,
Alex
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Old 04-30-2005, 02:44 AM   #2
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In order not to break the warranty but have noticeable improvement in low end, it is quite difficult, because the low end laziness is majorly due to the restrictive airflow right before and after the turbo... You HAVE to remove at least the cat in downpipe (i.e. 2nd cat) to get a noticeable difference.
I'm using AP Stg1, and I noticed "smoothed power curve" at low-end, and "more power" at mid-high end. I won't say Stg1 will give you "more power" at low-end. You can tell from looking at Cobb's dyno curve for Stg1...

Man...if you do have a F4, I'm sure you won't get used to the acceleration characteristic for these 4-wheeler, lol.
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Old 04-30-2005, 02:54 AM   #3
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Well, sometimes my WRX really seems to be stuck at low rpms, as if I were driving a 18 wheeler (not that I've ever done that, actually).
At a traffic light, I can get the "launch sequence" right and the WRX would start ahead of any other car (almost), but if I get caught by surprise or were not paying 100% attention, I really see Civics & Co. pulling away...
You're saying the AP smoothed out the low rpms and gave you a stronger mid-range: overall, would you recommend it as a solution for the above problems (assuming I absolutely do not want to break the warranty)? At $600, it's not exactly cheap...

PS: yes, my F4 is a bit quicker...
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Old 04-30-2005, 04:46 AM   #4
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To address those issues, I would not recommend it to you. Stg1 really won't give you a "WOW" difference of low-end improvements. I'm quite sure you will still experience that lag with Stg1.
Is yours a 4eat? If yes, then T/C definitely help for dead-stop starting.
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Old 04-30-2005, 08:46 AM   #5
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I improved my low end greatly with light pulley set and I'm running AP stage 1 as well. The car actually feels pretty strong all over the curve. Learning how to drive WRX is also a big factor. It takes a while to get used to it.
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Old 04-30-2005, 10:00 AM   #6
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I was very happy with Cobb stage 1 (just went stage 2), and I think it will help you. Personally I noticed a bigger differences between stock and stage 1 than stage 1 to stage 2, but many will disagree with that. I've only been stage 2 for 2 days.
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Old 04-30-2005, 11:17 AM   #7
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here is my stg1 on a dyno dynamics @ ktr. all cats are in place.



here is one of the other suby that is almost stock, i believe he had a catback



you make the call to see if it's enough oomph. the charts dont lie. these two runs were done on the same day, same dyno.

you can tell the stg1 ap def holds boost for another 500rpm before it tapers off. you'll def notice that once you drive it. but as far as low end, its very similar.
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Old 04-30-2005, 12:12 PM   #8
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Quote:
Originally Posted by express_wagon
here is my stg1 on a dyno dynamics @ ktr. all cats are in place.



here is one of the other suby that is almost stock, i believe he had a catback



you make the call to see if it's enough oomph. the charts dont lie. these two runs were done on the same day, same dyno.

you can tell the stg1 ap def holds boost for another 500rpm before it tapers off. you'll def notice that once you drive it. but as far as low end, its very similar.
Wow that isa nice jump in HP with the stage 1. What other mods do you have?
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Old 04-30-2005, 01:42 PM   #9
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Is this your first turbo car? If so you will get used to the lag. Most turbo Hondas don't boost until 5000 Rpm's. I have learned to like the lag that my cars have. It's a real event on my Galant. I would think that an up pipe should help spool it up quicker. I'll let you know in a few weeks. I just can't wait for my warrenty to run out to get started.
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Old 04-30-2005, 04:41 PM   #10
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Quote:
Originally Posted by Wrx/GVR4-Owner
Is this your first turbo car? If so you will get used to the lag. Most turbo Hondas don't boost until 5000 Rpm's. I have learned to like the lag that my cars have. It's a real event on my Galant. I would think that an up pipe should help spool it up quicker. I'll let you know in a few weeks. I just can't wait for my warrenty to run out to get started.
Yes, it's my first turbo car, and certainly I had to learn how to get the most out of it. Nevertheless, I think there are way to improve the response at low rpms, and I'm trying to understand if the $600 Access Port is a viable solution or not. Some people say no, some people say yes...
Let's wait and see what the majority says, then I'll decide.
As I said, I absolutely want to keep the car under warranty, so I know my options are limited.

PS: I'm also thinking at Rota Downshift 17x7.5 with 225/45/17 Azenis or Yoko ES100. With stock suspension (only mod: 20mm rear swaybar) they should not rub at all under almost any load. At least, this is what I read in other threads, if you know otherwise, let me know...
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Old 04-30-2005, 04:48 PM   #11
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I dunno, I definately noticed significantly more torque down low, running the 93 stage 1 map. Just for the heck of it, running at 30 mph, I threw it in 4th after the reflash and at less than 2K, it didn't bog or anything! Obviously it wasn't going to pull, but the point is that it had enough torque to keep the engine happy down that low. Before the reflash, if I were to do that, it would have bogged.
Also, not only is there more torque, but it pulls nice and smooth now throughout the rev range. It significantly reduces the lag, in my opinion.
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Old 04-30-2005, 04:50 PM   #12
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Oh yeah, and you can definately find the AP for less than $600 on here. Picked up mine for $475 shipped!

And you'll be fine with 225/45/17 tires.
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Old 04-30-2005, 04:58 PM   #13
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Quote:
Originally Posted by Paulie V
Oh yeah, and you can definately find the AP for less than $600 on here. Picked up mine for $475 shipped!

And you'll be fine with 225/45/17 tires.
$475 shipped??? Where? Used, I guess...
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Old 04-30-2005, 05:09 PM   #14
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Yep, used in the Private For Sale section. I've seen them go for anywhere from $450 to $550 used. If you do go this route, make sure that they have properly unmarried it from their car, or else it'll be pretty useless to you!
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Old 04-30-2005, 05:58 PM   #15
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Quote:
Originally Posted by dcwrx2
To address those issues, I would not recommend it to you. Stg1 really won't give you a "WOW" difference of low-end improvements. I'm quite sure you will still experience that lag with Stg1.
Is yours a 4eat? If yes, then T/C definitely help for dead-stop starting.
4EAT? T/C?
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Old 04-30-2005, 06:30 PM   #16
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Quote:
Originally Posted by CBR600F4
4EAT? T/C?
Ha ha! This place is almost as bad as my work with acronyms!
4EAT means an auto tranny (I believe it means 4 speed electronic automatic transmission)

T/C- dunno, got me on that one! Maybe short for ECUtek?
Edit: Actually, just thought about it- he's probably talking about playing with the torque converter for better dead stop acceleration.
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Old 04-30-2005, 07:13 PM   #17
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Quote:
Originally Posted by EDM
Wow that isa nice jump in HP with the stage 1. What other mods do you have?
my only power mods. ap 93oct stg1 and itg panel filter which i doubt even does anything. hey, it was free so why not.
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Old 04-30-2005, 10:39 PM   #18
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I just got an AP for my 2002 WRX and it felt significantly different from 2 to 4k rpm to me. I think it might matter if you can do the 93 octane stage 1 flash instead of 91.

R
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Old 05-01-2005, 01:08 AM   #19
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T/C is a torque converter. In fact, I'm debating switching mine out too now. Got the AP, and it still bogs. I'm not sure if I should do up/down pipes first.
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Old 05-01-2005, 02:02 AM   #20
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got my ap and i noticed it doesnt bog in first gear. im also running a lot more boost in 1st and 2nd with the ap then i did stock. in my opinion i think its the best bang for the buck mod. i went with coilovers as my first mod. then went with the ap a few mods later.
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Old 05-01-2005, 02:58 AM   #21
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Quote:
Originally Posted by Rollo`
I just got an AP for my 2002 WRX and it felt significantly different from 2 to 4k rpm to me. I think it might matter if you can do the 93 octane stage 1 flash instead of 91.
R
Here in SoCal we can get only 91, and very often of bad quality, too (on top of being almost as expensive as champagne...), so 93 is not at option.
A few people agree the AP helps even at low RPMs (probably not 1k, but definitely 2k) and the dyno runs I see here above DO show an improvement, even if not radical, so at this point I think I will buy it, probably new from Cobb (it's difficult to find them used and in any case used ones are not that cheaper).

Last edited by CBR600F4; 05-01-2005 at 12:03 PM.
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Old 05-01-2005, 12:53 PM   #22
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Gutting the U/P will knock around 500 rpm's off your lag, and will look stock to you dealer. You will eventually need to do the resistor mod to yor EGT sensor, but that costs $0.20 @ Radio Shack.
AP stg. 1 will improve on that, and when your warranty expires, you can go to higher stages as you add more mods. It's worth the buck's!
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Old 05-01-2005, 01:51 PM   #23
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I had an '04 WRX before my STi, and had the stage one AP in the WRX. It did make a noticable difference in the low end. The big fix was the CL/OL transition time on the 04/05 cars, on the stock car it waits a bit after full throttle before it switches to performance mode, with the AP it gets rid of this delay which makes the car feel much smoother and more responsive.
This type of change doesn't really show up on a dyno chart since they are steady state WOT you can't really see the impact of delay, except in the AFRs for the first few seconds of the pull.
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Old 05-01-2005, 08:06 PM   #24
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Quote:
Originally Posted by seattle944t
I had an '04 WRX before my STi, and had the stage one AP in the WRX. It did make a noticable difference in the low end. The big fix was the CL/OL transition time on the 04/05 cars, on the stock car it waits a bit after full throttle before it switches to performance mode, with the AP it gets rid of this delay which makes the car feel much smoother and more responsive.
This type of change doesn't really show up on a dyno chart since they are steady state WOT you can't really see the impact of delay, except in the AFRs for the first few seconds of the pull.
Thanks for the input, now I'm really looking forward to get one!
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Old 05-02-2005, 02:47 PM   #25
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CBRF400. I just installed AP this Friday on my 04 manual tranny WRX. Stage1 91 octane. It makes a huge difference. Boost comes on earlier and allows me to keep the car in a higher gear than I would have before the reflash. Rolling in second gear at 2500rpm and then accelerating provides IMMEDIATE smooth acceleration unlike stock where it hesitates and then spikes a second or two later. This is the way a WRX should come stock. The stage 2 boys have to be nothing but grins but I'm happy with the Stage1 (for now! hehe). Before I did the reflash I installed some Samco intercooler hoses and would recommend them as well. It's an easy mod and there should be no negative consequences from imporving the intercooler airflow. I did a before and after buttdyno test with the only the hose swap and they smoothed out the idle and seemed to let the boost come on a touch earlier.
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