STI7 PPP fuel pump
09 February 2003, 10:07 PM
#62
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Deep,
I agree with you in one way
but if mine blows they can only blame me for putting in Fuel, topping up Oil/water and switching on the Engine 
Tony
I agree with you in one way
but if mine blows they can only blame me for putting in Fuel, topping up Oil/water and switching on the Engine Tony
10 February 2003, 04:56 AM
#64
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Pat, may I ask:
1. Which high pressure / high flow fuel pump do you recommend? I know the STI website advertises one.
2. If the variable voltage to the fuel pump (0, 33, 66, 100%) is controlled by the ECU, then changing the fuel pump doen't take away this feature, right?
The only difference changing the pump would make, is that the new pump would be able to sustain good pressure (upwards of 4bar?) at high IDCs, true?
Cheers!
1. Which high pressure / high flow fuel pump do you recommend? I know the STI website advertises one.
2. If the variable voltage to the fuel pump (0, 33, 66, 100%) is controlled by the ECU, then changing the fuel pump doen't take away this feature, right?
The only difference changing the pump would make, is that the new pump would be able to sustain good pressure (upwards of 4bar?) at high IDCs, true?
Cheers!
10 February 2003, 08:31 AM
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Pat
Coming in very late in the topic, you may remember recently I had an STi7 go bang with Piston no1 melting due to fuel starvation. Just a real quick yes or no. If the car ahd a spirited run cross country with a run at around 140, could the pump not do the job. I ask because of recent issues on the continent, and of course how far i push IM to recover £4500.
Thanks in advance
Coming in very late in the topic, you may remember recently I had an STi7 go bang with Piston no1 melting due to fuel starvation. Just a real quick yes or no. If the car ahd a spirited run cross country with a run at around 140, could the pump not do the job. I ask because of recent issues on the continent, and of course how far i push IM to recover £4500.
Thanks in advance
10 February 2003, 02:27 PM
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It is scary stuff indeed.
We were perturbed by this and did a bench test to asceratin the difference in cpabilties between the two pumps
Both pumps were tested on a rig at a constant 13.5 volts
The OE pump is the 42021FE000,, funny how it's the same pump in the WRX and the STi
.. makes a lot of sense Column one is delivered pressure
Column two shows flow rate in litres per minute for the ITP 160 pump that we use in any upgrades.
Column three is current drawn for the ITP 160.
Column four is flow rate for the OE pump
Column five is current drawn for the OE pump.
3 bar 3.5 8.0 1.7 7.2
4 bar 3.2 9.0 1.4 8.0
5 bar 2.8 10.0 1.0 8.2
6 bar 2.5 11.5 lock out at 5.2 bar
8.5 bar locked out at 14 amps
I leave you to draw your own conclusions from that one chaps. needless to say, it's the first thing we change on ours when it comes!
Hope this helps a bit
Cheers
Paul
TSL
10 February 2003, 03:53 PM
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Paul they are great results, but surely the flow differences in the 3 to 4 bar range (ie atmo to 1 bar boost) are so significant that you would have to massively lean the map out?
10 February 2003, 04:16 PM
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Adair,
Glad you read the Post One friend in non PPP'd Sti7 has told me yesterday after a long Blat up the road 20miles(stage section
flat out 5th and went 6th and car didn't want to go anymore 
simular thing happen to me with mine.
Glad you read the Post
One friend in non PPP'd Sti7 has told me yesterday after a long Blat up the road 20miles(stage section flat out 5th and went 6th and car didn't want to go anymore simular thing happen to me with mine.
10 February 2003, 04:23 PM
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Dirk/Trouser/Bob Rawle/Pat,
Great with all you Techie guys doing testing and all comming to the same conclusion the OEM Pump is a danger to the STi7's health 
Addair,
I did see your thread some time ago but way to long to read it t5nyw@aol.com
Tony
Edited due to Spoolink Mistacks
[Edited by T5NYW - 2/10/2003 6:30:29 PM]
Great
with all you Techie guys doing testing and all comming to the same conclusion the OEM Pump is a danger to the STi7's health Addair,
I did see your thread some time ago but way to long to read it
t5nyw@aol.comTony
Edited due to Spoolink Mistacks
[Edited by T5NYW - 2/10/2003 6:30:29 PM]
10 February 2003, 04:37 PM
#73
Trouser,
Interesting & useful input. My question is; when you upgrade your fuel pumps do you run them at a constant 13.x volts or do you allow the ECU to vary the voltage to the upgraded pump, as per the OEM device?
I assume you also upgrade the fuel regulator while you are at it?
Cheers
WB
Interesting & useful input. My question is; when you upgrade your fuel pumps do you run them at a constant 13.x volts or do you allow the ECU to vary the voltage to the upgraded pump, as per the OEM device?
I assume you also upgrade the fuel regulator while you are at it?
Cheers
WB
10 February 2003, 05:15 PM
#74
Sti sell uprated fuel pumps themselves:
http://www.subaru-sti.co.jp/parts/new_impreza/cat3.html, as well as a device to stop fuel surge. Using babelfish.altavista.com to translate the website, it sppears that these parts are designed for competition use, where higher demands are placed on the system.
Also notice they have a lightweight aluminium rear diff cover, which not only saves weight, but aids cooling of the rear diff during strenusous use. Not sure how many people would buy the Magnesium rocker covers to save a mere 600g though!
Must admit though, the titanium exhaust looks and sounds fantastic (an owner up here has one!)
John
http://www.subaru-sti.co.jp/parts/new_impreza/cat3.html, as well as a device to stop fuel surge. Using babelfish.altavista.com to translate the website, it sppears that these parts are designed for competition use, where higher demands are placed on the system.
Also notice they have a lightweight aluminium rear diff cover, which not only saves weight, but aids cooling of the rear diff during strenusous use. Not sure how many people would buy the Magnesium rocker covers to save a mere 600g though!
Must admit though, the titanium exhaust looks and sounds fantastic (an owner up here has one!)
John
10 February 2003, 06:26 PM
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Deep,
The answer to the question "does it solve the problem" that I got from Dirk @ Powerstation and Merv @ PE is yes, it solves the problem. I didn't specifically ask "does the multi volatage cause an issue/not solve the problem fully", but the implication is that an uprated pump does solve the problem.
Matt
The answer to the question "does it solve the problem" that I got from Dirk @ Powerstation and Merv @ PE is yes, it solves the problem. I didn't specifically ask "does the multi volatage cause an issue/not solve the problem fully", but the implication is that an uprated pump does solve the problem.
Matt
10 February 2003, 07:08 PM
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Just in case IM are reading this, GAFY's !!!
A 6 month wait for a PPP that's crude at best and they wonder why ppl like me are going elsewhere for more power. [img]images/smilies/mad.gif[/img]
A 6 month wait for a PPP that's crude at best and they wonder why ppl like me are going elsewhere for more power. [img]images/smilies/mad.gif[/img]
10 February 2003, 09:04 PM
#78
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Thanks Matt,would make me feel a bit better if Pat/Bob confirmed it!
JBanks: 'means map would have to be seriously leaned out'.I think this is true.I have heard of people on the new and classic having to shave 30% of the fuel map to get back to where they were before replacing the pump.
JBanks: 'means map would have to be seriously leaned out'.I think this is true.I have heard of people on the new and classic having to shave 30% of the fuel map to get back to where they were before replacing the pump.
10 February 2003, 09:19 PM
#79
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I have been told that the fuel pump alone solves all the issues. If I see anything to suggest otherwise when I do a decatted STi 7 UK (with fuel pump) tomorrow I will let you know.
10 February 2003, 09:41 PM
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Interesting,
So does this mean that if you had your car remapped and new fuel pump put in at the same time but then decided to put your car back to 100% stock with a new OEM ECU but you left the uprated fuel pump in that your car would be running super rich ? IE: an uprated fuel pump with standard ECU and no remapp = crazy rich ?
Cheers,
Ray
So does this mean that if you had your car remapped and new fuel pump put in at the same time but then decided to put your car back to 100% stock with a new OEM ECU but you left the uprated fuel pump in that your car would be running super rich ? IE: an uprated fuel pump with standard ECU and no remapp = crazy rich ?
Cheers,
Ray
11 February 2003, 02:13 AM
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I have been paying a bit more attention to my fuel pressure gauge. Std STI7 type RA.
At the transition from vacuum to positive manifold pressure (the "0" point on the boost gauge), the fuel pressure suddenly jumps about 0.2-0.3bar. I assume this is the stepping of the fuel pump voltage from 33% to 66% which Pat mentions. I have not managed to find the other transition from 66% to 100% - presumably at around 0.5bar?
I've also noticed that my fuel pressure at high rpms, WOT, is more than 4bar. Of course, I'm not running terribly high boost. It peaks about 1.25bar in 4th, and then falls off gradually as the revs rise to the red line. Could I then, take this as a confirmation, that I DON'T need an uprated fuel pump in this state of tune? Thoughts?
Cheers.
At the transition from vacuum to positive manifold pressure (the "0" point on the boost gauge), the fuel pressure suddenly jumps about 0.2-0.3bar. I assume this is the stepping of the fuel pump voltage from 33% to 66% which Pat mentions. I have not managed to find the other transition from 66% to 100% - presumably at around 0.5bar?
I've also noticed that my fuel pressure at high rpms, WOT, is more than 4bar. Of course, I'm not running terribly high boost. It peaks about 1.25bar in 4th, and then falls off gradually as the revs rise to the red line. Could I then, take this as a confirmation, that I DON'T need an uprated fuel pump in this state of tune? Thoughts?
Cheers.
11 February 2003, 04:27 PM
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What's worring for us UK owners is will Subaru/IM do anything about it or will it be a case of 'US' winging owners again
Perhaps we should have a UK "Flat out in 5th Day" a timed event, longest time before you engine goes POP wins a 10" Scoobydoo doll
LOL.... well we would still have warrentee but maybe need a few mini buses laid on to take us home
IMHO
Tony
or will it be a case of 'US' winging owners again Perhaps we should have a UK "Flat out in 5th Day" a timed event, longest time before you engine goes POP wins a 10" Scoobydoo doll
LOL.... well we would still have warrentee but maybe need a few mini buses laid on to take us home IMHO
Tony
11 February 2003, 05:33 PM
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Tony,
Warranty mate, WARRANTY, how many times do I have to tell you?
RT/Deep, remember that the Defi doesn't read bar but mmHg so 1.2 is more like a "real" 1.1......
Matt
Warranty mate, WARRANTY, how many times do I have to tell you?
RT/Deep, remember that the Defi doesn't read bar but mmHg so 1.2 is more like a "real" 1.1......
Matt
11 February 2003, 06:01 PM
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ah ha !
I knew something was up. My GReddy manual boost gauge reads in mm..whatever as well, no wonder I was getting 1.4 bar on GReddy manual boost gauge and only about 1.25 - 1.3 on the delta dash....lol
Does anyone have the exact conversion ?
Cheers,
Ray
Learn something new everyday
I knew something was up. My GReddy manual boost gauge reads in mm..whatever as well, no wonder I was getting 1.4 bar on GReddy manual boost gauge and only about 1.25 - 1.3 on the delta dash....lol
Does anyone have the exact conversion ?
Cheers,
Ray
Learn something new everyday
11 February 2003, 06:15 PM
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Matt unless you've got a different one to me it reads in x100kPa.Conversion is 101.1kPa = 1 bar.Hence 1.25 on the Defis(or so it says) is 1.25bar give or take one percent.However when my Defi read 1.25ish bar/x100kPa Deltadash showed 1.08 bar boost.So almost 0.2bar out.
11 February 2003, 06:46 PM
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Hi guys,
I just went and had a look at my GReddy manual boost gauge:
It reads on the positive (pressure / boost) 0.1 increments up to 2.0 which I always thought was bar; however, it says that it is reading in Kg/cm2 <--- cm squared
Does anyone know what the conversion is to bar from Kg/cm2 ?
Cheers,
Ray
I just went and had a look at my GReddy manual boost gauge:
It reads on the positive (pressure / boost) 0.1 increments up to 2.0 which I always thought was bar; however, it says that it is reading in Kg/cm2 <--- cm squared
Does anyone know what the conversion is to bar from Kg/cm2 ?
Cheers,
Ray
11 February 2003, 07:42 PM
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What really gets up my nose is that I buy my STi new and order the PPP at the same and 6 months later there's still no sign of it...
So WTF are there STi8 owners getting their PPP's before me ??? [img]images/smilies/mad.gif[/img]
Not only are they getting their PPP's before me, but they also get a superior enhancement, well thanks for fvck-all and I'll take my buisness elsewhere thank you very much.
Look forward to seeing the boys at SS on Monday
And yes I will be having the fuel pump upgrade at the same time, funny how the after market tuners know more and are actively doing more about this issue than anybody 'official'.
Dont get me started on those fvcking springs... [img]images/smilies/mad.gif[/img]
So WTF are there STi8 owners getting their PPP's before me ??? [img]images/smilies/mad.gif[/img]
Not only are they getting their PPP's before me, but they also get a superior enhancement, well thanks for fvck-all and I'll take my buisness elsewhere thank you very much.
Look forward to seeing the boys at SS on Monday
And yes I will be having the fuel pump upgrade at the same time, funny how the after market tuners know more and are actively doing more about this issue than anybody 'official'.
Dont get me started on those fvcking springs... [img]images/smilies/mad.gif[/img]