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Old 07-18-2013, 07:34 PM   #776
P3Auto
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Good choice on clutch! Case closed.

Quote:
Originally Posted by SleePy04ScOObY View Post
That's my only assumption, I went in to have my car dyno and tuned but they had to stop mid tune because they said my clutch was was slipping @ 17 psi.. So they turned it down to 13.5 and said come back when you get a new clutch installed... My RPMs went up like normal but it's not like my car didnt accelerate.. It did just very.. Verrrry slowly.. I just purchased an ACT XTSS so I'm hopin to get that installed ASAP
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Old 07-18-2013, 07:50 PM   #777
SleePy04ScOObY
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Quote:
Originally Posted by P3Auto View Post
Good choice on clutch! Case closed.
Thanks man
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Old 07-19-2013, 12:05 AM   #778
Wrxak02
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Seth,

It's Richard. Would that hesitation during WOT shifting be from a possible boost leak? Figuring since theyre the cheap couplers and bands for the FMIC and Intake.
Dick
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Old 07-19-2013, 02:03 PM   #779
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There are different factors that can come in here. Boost leaks in a MAF setup can cause the car to go rich and perhaps cause a stumble. The BOV if you have one venting to atmosphere can cause a rich spike as well. If after the shift you are experiencing a boost spike this can cause some issues depending on whats going on and how the tune is responding to this spike. The BPV or BOV could also be a little loose or not closing completely or fast enough. Many things can add up to what your feeling.

In any cases like this I like to start with the basics so yes a boost leak check would be a good idea and its simple enough to do. Some basic logging can tell a lot about whats happening as well.

It could be something simple like a little too much tip in (momentary blast of fuel when pressing the accelerator back down quickly after a shift). In this case a wideband would be needed to check to see whats going on during this time. Keep in mind that leaks and other mechanical issues could be causing this effect so they have to be ruled out before you start making tune changes.

All said and done, more data is required here to answer accurately, so start by checking all the basics first.

Seth
P3 Import Autowerks 907.355.6655


Quote:
Originally Posted by Wrxak02 View Post
Seth,

It's Richard. Would that hesitation during WOT shifting be from a possible boost leak? Figuring since theyre the cheap couplers and bands for the FMIC and Intake.
Dick
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Old 07-19-2013, 02:19 PM   #780
Wrxak02
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Word. I just finished making my 'Coupler leak checker' the other night, was waiting for the weekend to test. Thanks for the input.

P.S. I'll probably be scheduling with ya'll about the clutch within the month, it's just about to be delivered, but the book labor time is gonna kill me, HAHAHA
Quote:
Originally Posted by P3Auto View Post
There are different factors that can come in here. Boost leaks in a MAF setup can cause the car to go rich and perhaps cause a stumble. The BOV if you have one venting to atmosphere can cause a rich spike as well. If after the shift you are experiencing a boost spike this can cause some issues depending on whats going on and how the tune is responding to this spike. The BPV or BOV could also be a little loose or not closing completely or fast enough. Many things can add up to what your feeling.

In any cases like this I like to start with the basics so yes a boost leak check would be a good idea and its simple enough to do. Some basic logging can tell a lot about whats happening as well.

It could be something simple like a little too much tip in (momentary blast of fuel when pressing the accelerator back down quickly after a shift). In this case a wideband would be needed to check to see whats going on during this time. Keep in mind that leaks and other mechanical issues could be causing this effect so they have to be ruled out before you start making tune changes.

All said and done, more data is required here to answer accurately, so start by checking all the basics first.

Seth
P3 Import Autowerks 907.355.6655
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Old 07-23-2013, 11:53 PM   #781
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Quote:
Originally Posted by P3Auto View Post
You probably should also look into a 3 port grimmspeed (or whatever) EBCS. The stock boost control solenoids on the older cars are usually pretty shot by now.

Seth.
P3 Import Autowerks 907-355-6655

Is the Cobb tuning just as good?
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Old 07-24-2013, 08:57 PM   #782
AK907TRE
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do most reputable shops in town use the cobb racer software or do they use the more advanced cobb pro (i think?) software to tune accessport - equipped wrx's?
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Old 07-24-2013, 10:33 PM   #783
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The Cobb 3-port is just as good and also comes with a mounting bracket as well, looking at picking one up for my car at some point
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Old 07-25-2013, 12:52 AM   #784
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Quote:
Originally Posted by tribalwrx View Post
The Cobb 3-port is just as good and also comes with a mounting bracket as well, looking at picking one up for my car at some point
Yeah same, Looks like COBBs is about 5-10$ cheaper and I think free shipping, Grimmspeed isn't. Guess I'll be going with COBB
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Old 07-25-2013, 01:11 AM   #785
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Quote:
Originally Posted by exogen View Post

Yeah same, Looks like COBBs is about 5-10$ cheaper and I think free shipping, Grimmspeed isn't. Guess I'll be going with COBB
Before doing anything you should figure out who is going to tune it for you. See which they prefer.
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Old 07-25-2013, 01:53 AM   #786
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Idk if this is a common problem but I want to know if this could be because of my tune.

When ever u let off the throttle and don't have it in gear the rpms sit for a little and then drop. So to make smooth daily driving shifts (having a CM stage 4 clutch and KB short shifter) I have to wait for the rpms to drop a little. I don't have a wideband yet but I am using the AP to read the A/F and when I let off the gas not in gear it reads richer for a second and then leans out.

I hope that was clear. Could this be a tune problem or is this common? Thanks
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Old 07-25-2013, 09:50 AM   #787
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You have a fmic?
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Old 07-25-2013, 10:18 AM   #788
Echodeltaseg
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Default how soon can i tune my car after replacing the shortblock.

............

Last edited by Echodeltaseg; 07-25-2013 at 10:51 AM.
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Old 07-25-2013, 01:41 PM   #789
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Our shop has the tools to tune with Cobb or direct flash. Both methods are good and meet the needs for 90% of the customers.

We also do AWD dyno tuning which allows for a precise and fully optimized tune.

Seth
P3 Import Autowerks 907.355.6655

Quote:
Originally Posted by AK907TRE View Post
do most reputable shops in town use the cobb racer software or do they use the more advanced cobb pro (i think?) software to tune accessport - equipped wrx's?
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Old 07-25-2013, 01:43 PM   #790
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I keep the grimmspeed 3ports in stock and will match the price of cobb. The grimmspeeds also do come with a bracket and hoses now.

Quote:
Originally Posted by exogen View Post
Yeah same, Looks like COBBs is about 5-10$ cheaper and I think free shipping, Grimmspeed isn't. Guess I'll be going with COBB
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Old 07-25-2013, 01:45 PM   #791
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There is some ways to tune this a little. Also do you have a blow off valve that vents to the atmosphere? This can cause your rich spikes and other small issues.

Quote:
Originally Posted by russianphil18 View Post
Idk if this is a common problem but I want to know if this could be because of my tune.

When ever u let off the throttle and don't have it in gear the rpms sit for a little and then drop. So to make smooth daily driving shifts (having a CM stage 4 clutch and KB short shifter) I have to wait for the rpms to drop a little. I don't have a wideband yet but I am using the AP to read the A/F and when I let off the gas not in gear it reads richer for a second and then leans out.

I hope that was clear. Could this be a tune problem or is this common? Thanks
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Old 07-25-2013, 06:06 PM   #792
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Quote:
Originally Posted by P3Auto View Post
I keep the grimmspeed 3ports in stock and will match the price of cobb. The grimmspeeds also do come with a bracket and hoses now.
Can't beat instock. Next paycheck I will try and set up a time to come by and get a tune and a few other things done.

Thanks Seth!
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Old 07-25-2013, 06:22 PM   #793
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I have a 02 EJ20. It was rebuilt and im running a VF49 twinscroll. I have been getting a cracking poping like backfiring combination. It only happens when the turbo spools up and 3/4 to WOT. Also have a accesport and its not throwing any codes. Any ideas? I have changed plugs fuel filter and cleaned the MAF with MAF cleaner.
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Old 07-25-2013, 06:45 PM   #794
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Part throttle issues can be for a lot of reasons. A lot of tuners pay little to no attention to that area of the tune as well. That being said you may just need that area of the tune adjusted.

Things that can cause this vary...Manual boost control or stand alone boost control can cause this, atmospheric venting blow off valves, boost leaks, etc.

You probably should go back and check all the basics first. A log or at the very least a reading from a wideband AFR gauge during the event would be helpful.

Using your AP to log a bit would help as well. I would suggest speaking with who ever tuned the car first after you check the basics. If you are still stuck we can walk you thru a few things to try logging but without a wideband we are a little blind on the fueling side of the car.

Quote:
Originally Posted by es743u View Post
I have a 02 EJ20. It was rebuilt and im running a VF49 twinscroll. I have been getting a cracking poping like backfiring combination. It only happens when the turbo spools up and 3/4 to WOT. Also have a accesport and its not throwing any codes. Any ideas? I have changed plugs fuel filter and cleaned the MAF with MAF cleaner.
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Old 07-25-2013, 06:52 PM   #795
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Ok I will get some data from the accesport. I have a walboro 255 fuel pump. Also I used modified injectors.
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Old 07-26-2013, 12:12 AM   #796
russianphil18
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P3auto and cossetwrx


I have a front mount with a bypass valve. 850cc injectors, ported head, Dom 4.0....many other mods but those should be the only relevant ones

So the tune can be adjusted to get rid of those spikes and in turn let the car lower its rpms normally?
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Old 07-26-2013, 01:41 AM   #797
cosseywrx
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If im reading and thinking right ky car does this. But only a few hundred rpms. Then it dies down to normal ifle once fully stopped. Imo its a normal subie action
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Old 07-26-2013, 02:27 PM   #798
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Some of it can be normal. Excessive rpms or long term rpm hang is not. There are ways to tune some of this out assuming its not a mechanical issue. My experience with the 2005 STI is that this hang you describe is not normal if its prolonged enough to affect gear shifts for you.

Quote:
Originally Posted by russianphil18 View Post
P3auto and cossetwrx


I have a front mount with a bypass valve. 850cc injectors, ported head, Dom 4.0....many other mods but those should be the only relevant ones

So the tune can be adjusted to get rid of those spikes and in turn let the car lower its rpms normally?
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Old 07-28-2013, 04:21 PM   #799
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I think that if I had a stock clutch and a stock shifter then I think it would be normal timing. But because I have a short shifter and an almost racing clutch I can shift faster but it seems that my engine doesn't want to let me do it that fast. So I think the hang isn't noticeable when stock. Do others with similar setups notice this?

Thanks
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Old 07-30-2013, 02:20 PM   #800
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Quote:
Originally Posted by russianphil18 View Post
I think that if I had a stock clutch and a stock shifter then I think it would be normal timing. But because I have a short shifter and an almost racing clutch I can shift faster but it seems that my engine doesn't want to let me do it that fast. So I think the hang isn't noticeable when stock. Do others with similar setups notice this?

Thanks
I also am experiencing RPMs hanging after placing it in neutral. They usually stay around 2500 RPM for about a second or two before dropping to idle, where it kind of surges a bit.

I have an 07 STi with Injen CAI and Catless DP/TBE. I also have a protune, although all the mods/tune were done before I bought the car.

Aside from the tune/mods, what could cause this? I also have some slight hesitation above 2800 RPMs or so when the engine is cold so I usually sit and let it warm up for 1 minute and then it drives like a champ. Anyone have thoughts on that?
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