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Old 09-27-2009, 08:35 PM   #1
SubieWubieWu
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Default 06 WRX TR boggs out and want Moar POWER!! Look Inside

Hello I have a Walbro 255 Fuel Pump Installed and tuned in my car with (750cc injectors from deatchwerks) with no Fuel pressure regulator .

1. That being said the dyno jet when my car was getting tuned was reading the injectors lower than 650 but close to stock spec (550) but why they are deatchwerk 750's Baby Blue in color says on the box and the paper that they tested it.

2. When i run my car it bogs out at 5-55 RPM in second gear all the way through 5th. I want to know why it bogs out Ive asked my tuner and he says it might be the fuel pump i checked and its 255 walbro he said if its not that then its the injectors I have 750. WHY DOES IT BOG???? (Run good then stop real quick and go , run good stop real quick then go again) is this bad.

3. I pushed 292 whp on a dynoJET turbo was a fp 18g @ 20psi wanted more power but said it was the gas bc its ****ty 91 octane and the turbo wich made me not push as much power. I wanted around 400whp the tunner said I needed to upgrade the turbo and octane of gas also injectors

Why does this car bog out?
When I have 255 Walbro FP
750 Injectors
Is the boggin out bad for my motor?
Why did the Dyno Read Lower than 750cc (read a little higher than 550)?

To make 400whp all i need to upgraded is turbo/inj and oct of fuel with a tune?

Mods are as folows:
Cosworth Pistons/Rods
Subaru Bearings
Deatchwerk 750 Inj
Walbro 255 FP
FP 18g
Megan Racing TBE no cat
made 292whp @20PSI 91 oct

Thanks any help will be apreciated.
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Old 09-27-2009, 08:55 PM   #2
07wrx4life
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what did you do with your fuel pressure regulator?
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Old 09-27-2009, 08:55 PM   #3
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oh boi....
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Old 09-27-2009, 09:02 PM   #4
teiva-boy
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400Whp,

Damn SCIC bringing down the collective IQ a few points.
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Old 09-27-2009, 09:22 PM   #5
SubieWubieWu
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I was told I didnt need one a fuel pressure regulator and I was told by a few shops that i can manage without one. I know I typed 400 i was reaching for 350-400 but received 292 instead thats why I want to know if anyone can help me out WITH ANY USEFUL Info????? I am no guru here so help me out.
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Old 09-27-2009, 09:35 PM   #6
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An fp18g will not achieve 350whp without meth and/or high octane fuel.

750cc and 255lph pump injectors are fine for an 18g.

292whp is in the typical range for an 18g on 91, nothing wrong here.

can you elaborate a little more on the bogging? 5-55rpm?

If you really think that you need 400whp, you should do a lot more research. That is A LOT of power, and frankly, i don't think you know enough about your car to warrant wanting that much power.
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Old 09-27-2009, 10:10 PM   #7
SubieWubieWu
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ok thats nice to know about the range for the setup just read up on the wrong things then bc all i was looking at was 350 at 20 and they had a similar setup that why i thought my dyno was low.

as for boggin out it i have a video that of me racing and you can hear it twice in the first 13-16 seconds cearly if you payattention to the subaru exhaust kinda hard but thats what i mean by bogginng out the best i can describe it.

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Old 09-27-2009, 10:11 PM   #8
07wrx4life
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Quote:
Originally Posted by SubieWubieWu View Post
I was told I didnt need one a fuel pressure regulator and I was told by a few shops that i can manage without one.
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Old 09-27-2009, 10:21 PM   #9
SubieWubieWu
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i know i was doing the same thing thought they were stupid but i did the tune and thought everything was fine till i drove it home from the dyno sessin and it was bogin out like in the video.

what you think is causing the bogging out?
and is it bad?
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Old 09-28-2009, 02:03 PM   #10
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Quote:
Originally Posted by SubieWubieWu View Post
i know i was doing the same thing thought they were stupid but i did the tune and thought everything was fine till i drove it home from the dyno sessin and it was bogin out like in the video.

what you think is causing the bogging out?
and is it bad?

English, bad yours is.

The wording above alludes to you did the tuning, and the shop provided a dyno session?

What tuner did you use? Most go to HB Speed in Huntington Beach.... They have a good rep, and I got your HP levels with my EVO III 16g

That said, a reputable tuner will tell you why you did what you did, and what parts are bad for your application, as well as what parts you need to reach your goals... All without pushing their own agenda and own products for sales.

Go forth, stop posting here, and do more research and talk to a tuner!
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Old 09-28-2009, 03:32 PM   #11
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Yeah sorry I did not do the tunning that was a type-o Integrated Performannce did the tunning. HB Speed ive herd of them but did not want to go there plus have to book way in advance to go there anywayz as for hp level with you 16g I really dont give a $hit really so that you can keep to youself.

That being said if You read my post carefully I did talk to my tunner thats why i posted in here READ CARFULLY!!!

2. When i run my car it bogs out at 5-55 RPM in second gear all the way through 5th. I want to know why it bogs out Ive asked my tuner and he says it might be the fuel pump i checked and its 255 walbro he said if its not that then its the injectors I have 750. WHY DOES IT BOG???? (Run good then stop real quick and go , run good stop real quick then go again) is this bad.

3. I pushed 292 whp on a dynoJET turbo was a fp 18g @ 20psi wanted more power but my tunner said it was the gas bc its ****ty 91 octane and the turbo wich made me not push as much power. I wanted around 400whp the tunner said I needed to upgrade the turbo and octane of gas also injectors among other things.


Now please usfull information would be apreciated not this my evo has better power and its 16g crap kid **** ryt there and who are you to judge if i can post in here and what not. just because it says you are a guru dont mean $hit and give you the privilage of telling people what to do in the forum.
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Old 09-28-2009, 04:38 PM   #12
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are you talking about that backfire-ish sound in your video around 8 seconds in?
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Old 09-28-2009, 04:48 PM   #13
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Sounds like you need a new tuner or a second opinion.
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Old 09-28-2009, 05:00 PM   #14
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ok, stop getting angry... first off, your posts are horrible, so many people do not want to respond as they simply can not figure out what the hell you are saying. From what I can sift through, I see your concerns ar about bogging... whatever the hell that means. Looking at the vid, there is nothing out of the ordinary that I can see or hear. Try doing an IN car vid to show what is going on without another car that is hindering the sound.

DW injectors are very well appreciated, so the brand is not the problem... there is always the chance of a bum injector, or it was installed wrong, or an O ring is not set right... many issues that can crop up. uninstall them, take a look and see if something looks wrong, and put them back and ensure everything is tight and sealed.

wally 255 pump... again has a high reputation, however if it was installed wrong, if the fuel filter is clogged to hell, if the in take pre filter sock has collapsed and is now blocking fuel, then there will be issues. no way to know unless you replace the filter, and drop the tank to check on the pre filter and pump.

As far as the fuel pressure regulator... why it was removed, I have no idea.... because with my understanding without an FPR there is no way to control the pressure and will be lower then intended, thus at higher rpm, you will simply run out of fuel.... honestly, I'd ask the shop to road test your car to see exactly what is happening... without driving it themselves they are just speculating based on your word (which no offence, is pretty weak... nothing you are describing is helping us determine what is happening).

based on what you said I'm going to guess that you are running out of fuel to the engine. the lack of the FPR means less pressure at higher rpm (as there is nothing there to keep the pressure up now) and now in the higher rpm with the higher load, you simply run dry. Why did this not happen on the dyno? they used a dynojet which is not a true load bearing dyno, so the engine load will be less, overall, thus the tables wil shift... this is kinda a stretch on its own as you really have not given much in the way of good information to go on. so, there ya go. check the pump, check the injectors, and check the tune.

side note: the guy with the "evo" is not driving an evo, but has the EVO series 16g turbo... and it is relevant as with the use of a 18g turbo (which is larger) you should make more power... which really leads me to suspect the installs, or the tune in general... things are just not adding up at all. and the reason that HB needs long term reservations could be because they are better? and the place you went to is not, thus no wait time? I dont know either, so again speculating... but still, you get the idea.

so: how about an in car vid of what is happening. if someone else you know can ride with you and verbalize it in a different way, then ask them to do a write up with wha they "experienced" so we may get a different take on it. check the injectors, check the pump, and take the car back to the tuner and have THEM look at it in person, as if it happened on the way home from the tune, then I'd suspect tg=he tune or install
immediatly.

T
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Old 09-28-2009, 06:11 PM   #15
SubieWubieWu
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wonderfull all i wanted to know that is all sorry for the mishap and such and i think i will give hb speed a try thanks
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Old 09-28-2009, 10:51 PM   #16
f1speeder
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Default Same problem

I just started to notice the same thing .

At 5000 RPM to 5500 RPM the engine sound changes and the engine bogs' , then it comes back to life at 5500 to 6500 then you can feel the power again and the sound is normal.

I have the same fuel pump and injectors with a Block modified 08 STI turbo, stock TMIC, 19lbs boost, STI Short Block, and CP Pistons in my 06 WRX and was tuned by CBRD Speedfactory on a Mustang Dyno about 5 mths ago.

( 266 WHP and 288 Torque )

I have to ask CBRD yet and see what they think what's going on. I'll give you an update later next week and post what they said.

( I think it's an injector O ring )
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Old 09-28-2009, 11:41 PM   #17
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what?

Are getting any CELs? What did you run on the track?

For 400whp you will need a new tranny and turbo setup

GL
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Old 09-29-2009, 04:39 AM   #18
SubieWubieWu
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Wow thought i was the only one with the bogging out you were clear to the point dont know why i didnt post that hahahahha well i have an apointment with the shop on wendsday we are going to test out whats up with the fuel system when we drive it around and hopefully there is something wrong with the fuel system bc if not then it's going to be a headache let me know what happens to your solution
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Old 09-29-2009, 09:43 AM   #19
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Quote:
Originally Posted by SubieWubieWu View Post
I was told I didnt need one a fuel pressure regulator and I was told by a few shops that i can manage without one. I know I typed 400 i was reaching for 350-400 but received 292 instead thats why I want to know if anyone can help me out WITH ANY USEFUL Info????? I am no guru here so help me out.
They mean you don't need an aftermarket one. Your car probably just has the stock RRFPR (rising rate fuel pressure regulator), it goes up with boost. I doubt you or the previous owner took it off.
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Old 09-29-2009, 12:17 PM   #20
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Quote:
Originally Posted by f1speeder View Post
I just started to notice the same thing .

At 5000 RPM to 5500 RPM the engine sound changes and the engine bogs' , then it comes back to life at 5500 to 6500 then you can feel the power again and the sound is normal.

I have the same fuel pump and injectors with a Block modified 08 STI turbo, stock TMIC, 19lbs boost, STI Short Block, and CP Pistons in my 06 WRX and was tuned by CBRD Speedfactory on a Mustang Dyno about 5 mths ago.

( 266 WHP and 288 Torque )

I have to ask CBRD yet and see what they think what's going on. I'll give you an update later next week and post what they said.

( I think it's an injector O ring )
do you have a boost spike followed by a dip? that could indicate a leaking wastegate actuator. my car use to do that

scan car for misfire codes?
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Old 09-29-2009, 01:59 PM   #21
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Quote:
Originally Posted by eb_rat_7 View Post
do you have a boost spike followed by a dip? that could indicate a leaking wastegate actuator. my car use to do that
I have to look at mine and see if that does that, I never noticed that ........ As for FPR I have the two small fpr black in color i think that the shop pointed out tomorrow we are going to check it out at the shop.
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Old 09-29-2009, 04:27 PM   #22
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Default Codes and Wastegate

Quote:
Originally Posted by eb_rat_7 View Post
do you have a boost spike followed by a dip? that could indicate a leaking wastegate actuator. my car use to do that

scan car for misfire codes?
I have a Cobb AP and there is no codes, and no boost spike.

I have a catted Cobb downpipe with the factory BOV and wastegate. I don't think it's leaking , but it's something to check. Thanks
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Old 09-29-2009, 04:37 PM   #23
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detonatioNNNNNNNN


You are destroying your motor















imho of course

My guess is the rpm range where you get "Bogging" will slowly grow from 5000-5500 (which is what I assume you meant to imply) in both directions.

Stop destroying the car and either learn about what you are trying to do, or find someone who actually knows what they are talking about.

If not you are due for an expensive repair SOON.
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Old 09-29-2009, 09:11 PM   #24
f1speeder
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Quote:
Originally Posted by V6TurboTA View Post
detonatioNNNNNNNN


You are destroying your motor















imho of course

My guess is the rpm range where you get "Bogging" will slowly grow from 5000-5500 (which is what I assume you meant to imply) in both directions.

Stop destroying the car and either learn about what you are trying to do, or find someone who actually knows what they are talking about.

If not you are due for an expensive repair SOON.
I just contacted my tuner ( CBRD ) and Chad told me to 1st to un-marry the map then disconnect the battery for 1 hour the reload the map.

As for the "bogging" it is as I say; it starts at 5000 and ends at 5500 every time. This only started 2 weeks ago.
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Old 09-30-2009, 04:27 AM   #25
SubieWubieWu
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F1Speeder I am going to the tunner tomorrow and will let you know how it goes .......It might be boost cut and it might be the fuel pressure regulator for the bogging out but i will let you know what happens tomorrow im scheduled in the morning at 10.
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