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Old 01-21-2004, 02:25 PM   #1
clamdip
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Default fuel pressure regulator and stock injectors?

okay, what if i up the fuel pressure on the stock injectors. would i be able to run a bigger turbo? i was thinking of doing the free fuel pressure regulator upgrade thingy, however, what effect will this have if i keep the stock injectors. say i get a VF30, could i run it off the stock injectors + higher fuel pressure? any suggestions?
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Old 01-21-2004, 02:41 PM   #2
cdvma
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I wouldn't risk the integrity of the car with those upgrades when you can modify the stock injectors to flow 720cc for free. Do the injector mod, get a fuel pump and leave the FPR alone. You do have engine management right?
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Old 01-21-2004, 02:59 PM   #3
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clamdip, you can run a VF30 on the stock injectors with NO fuel system mods. you just need a REALLY GOOD tuner.
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Old 01-21-2004, 03:08 PM   #4
mbiker97
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Quote:
Originally posted by RussB
clamdip, you can run a VF30 on the stock injectors with NO fuel system mods. you just need a REALLY GOOD tuner.
Please expand. What boost, what afr, what HP?
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Old 01-21-2004, 03:09 PM   #5
cdvma
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Quote:
Originally posted by RussB
clamdip, you can run a VF30 on the stock injectors with NO fuel system mods. you just need a REALLY GOOD tuner.
You can run the car without tires...but would you do it? Hehe
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Old 01-21-2004, 03:14 PM   #6
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Quote:
Originally posted by cdvma
You can run the car without tires...but would you do it? Hehe
well, considering my car runs at around 18 psi peak tapering down to about 12 at redline, max IDC is 90%, and EGT's are lower than 600 deg C (more like 550 at WOT), i'd say it's running pretty safely. no HP figures yet due to the shop awaiting delivery of their dyno and Delta Dash road dyno doesn't work so hot on an automatic.
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Old 01-21-2004, 03:36 PM   #7
mbiker97
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Where is your EGT tapped. Is it in your uppipe? Those are very very low EGTs.
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Old 01-21-2004, 04:37 PM   #8
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those numbers are from Delta Dash, so yeah, I know they're lower than what an EGT gauge would read if tapped into the exhaust manifold.

the point is that the car is tuned around the stock fueling. i know it's not making it's full potential (but still a huge improvement over stock), probably not even close to what it could do with upgrading the fuel, but it's a work in progress, and it can be done.

p.s. sorry for hijacking your thread Clamdip.
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Old 01-21-2004, 05:09 PM   #9
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VF30 @ 18psi on pump gas
Stock WRX injectors with no mods to them
Max 90% IDC

Please tell us what you haven't told us yet. Like... that you're running water injection or something.
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Old 01-21-2004, 05:33 PM   #10
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it's an automatic, and I'm pretty sure that's where the difference is.
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Old 01-21-2004, 11:01 PM   #11
clamdip
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cool, thanks for the replies guys! yeah, i heard that you can run the VF30 on the stock fuel system, however, your IDC's will be a bit high. also, about the "free mod" for stock injectors, i would need some type of tune for that. i guess i just have to buy STi injectors. thanks again guys.
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Old 01-21-2004, 11:45 PM   #12
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Quote:
Originally posted by clamdip
also, about the "free mod" for stock injectors, i would need some type of tune for that. i guess i just have to buy STi injectors. thanks again guys.
you will need some type a tune pretty much regardless of what fueling you run. a VF30 on an otherwise stock doesn't work out very well.
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Old 01-22-2004, 06:20 AM   #13
VetteVert
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What free fuel pump (not injector) mod are you talking about...must of missed it.


VV

Quote:
Originally posted by clamdip
cool, thanks for the replies guys! yeah, i heard that you can run the VF30 on the stock fuel system, however, your IDC's will be a bit high. also, about the "free mod" for stock injectors, i would need some type of tune for that. i guess i just have to buy STi injectors. thanks again guys.
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Old 01-22-2004, 10:09 AM   #14
cdvma
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You will need a tune for either the stock modded injectors or STi injectors, dont think you can plop them on the car and have it run OK.
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Old 01-22-2004, 10:20 AM   #15
Need4Boost
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Quote:
Originally posted by VetteVert
What free fuel pump (not injector) mod are you talking about...must of missed it.


VV
VV,

He is talking about modding the stock FPR.

http://forums.nasioc.com/forums/show...hreadid=480255

http://forums.nasioc.com/forums/show...ighlight=rrfpr
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Old 01-22-2004, 10:29 AM   #16
VetteVert
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OK, Thanks...hadn't heard it referred to that way

VV

Quote:
Originally posted by Need4Boost
VV,

He is talking about modding the stock FPR.

http://forums.nasioc.com/forums/show...hreadid=480255

http://forums.nasioc.com/forums/show...ighlight=rrfpr
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