Do I need a hp fuel pump with a tune to 320 whp - Page 2 - EvoXForums.com

spikester603 · 08-14-2012, 09:32 PM

Quote:

Originally Posted by Frankiago

Well I argued in a thread like this a long time ago, and kept getting responses from the artist formerly known as Bryan@GST that you can run out of fuel on 93 octane with the stock turbo. I kept saying bullshit and he kept saying it's possible. I believe it was a thread started by one of our UK members.

There was never any proof that the fuel setup needed to be touched on stock turbo, so I'm sticking with that.

He is right you can run out of fuel with the stock turbo, I've experienced it myself, it only happens when I try max speed on the autobahn, as soon as my needle gets to 170mph it feels like I've hit the rev limiter but a bit milder, I can hear little backfires. Thats the engine running lean due to the fuel pump not being able to cope.

bigstakk · 08-14-2012, 09:59 PM

PM Dino "Kooldino" at Speed Circuit and he will sort you out. GL!

ACE Ralliart · 08-14-2012, 10:21 PM

Fuel pump is a pretty simple and inexpensive mod. Why not upgrade as cheap insurance?

spikester603 · 08-17-2012, 09:17 PM

here is a short video of my 400bhp Evo X running out of fuel at 170 mph on the autobahn. I slowed down straight away...

apologies for the crappy phone vid and the crappy music..

You Tube

KickAss · 08-17-2012, 09:22 PM

No amount of apologies will allow me to forgive you for that god awful music spikey. Also, it might have been the injectors that were running out. Do you know for sure it was the pump? Stock pump is 210 and my wally is 255. My Wally is supporting me at 410 WHP on E85. I'm inclined to think it was your injectors. Also, why is your god damn ASC off?

OP, you will never go at 170 mph. Not even at the track. so with stock turbo and 93, you will not need any kind of work done to the fuel system.

spikester603 · 08-17-2012, 09:34 PM

Quote:

Originally Posted by KickAss

No amount of apologies will allow me to forgive you for that god awful music spikey. Also, it might have been the injectors that were running out. Do you know for sure it was the pump? Stock pump is 210 and my wally is 255. My Wally is supporting me at 410 WHP on E85. I'm inclined to think it was your injectors. Also, why is your god damn ASC off?

OP, you will never go at 170 mph. Not even at the track. so with stock turbo and 93, you will not need any kind of work done to the fuel system.

lol didn't have time to change the music as I was already cruising at 100mph-ish lol, do you think the injectors are being maxed out before the pump? my Tuner said I should buy a new pump (which I have just ordered today infact) but he never mentioned the injectors?? he knows his shit too!! I think its insane to think I could probably go even faster on a stock turbo if I upgraded the injectors and pump??

What Injectors should I go for? I've got a new turbo and IC to install soon, after my rods are done.

I always drive with the ASC off... I'm a control freak lol

KickAss · 08-17-2012, 09:37 PM

Quote:

Originally Posted by spikester603

lol didn't have time to change the music as I was already cruising at 100mph-ish lol, do you think the injectors are being maxed out before the pump? my Tuner said I should buy a new pump (which I have just ordered today infact) but he never mentioned the injectors?? he knows his shit too!! I think its insane to think I could probably go even faster on a stock turbo if I upgraded the injectors and turbo??

What Injectors should I go for? I've got a new turbo and IC to install soon, after my rods are done.

I always drive with the ASC off... I'm a control freak lol

you should log your car to see duty cycles of the pump and the injectors. That will tell you which component is being maxed out. Chances are they are right about the pump. But its the only way to find out.

Natek · 08-17-2012, 09:56 PM

Fic 1100 depending on turbo

mitsu912 · 10-03-2012, 05:32 AM

Yes, those saying you can run out of fuel efficiency on the stock turbo right about the edge where your stock turbo loses efficiency ~27-28psi. At 7500 rpms in 5th you are out of gear because you are stressing the shit out of the top end of the motor. Those valve springs aren't rated for that kind of punishment. You're likely experiencing a form of valve float at that point. These motors are so tight in tolerance, if the timing is too advanced you can grenade your motor with piston to valve collision not to mention stretching internals to the point of possible failure and perhaps jacking your BE bearings...

verkion · 10-06-2012, 01:05 AM

I think that old thread...Bryan was saying Injectors were capping out, not the fuel pump. I could be wrong though that's a long time ago. Injectors can cap out with stock turbo. I don't think too many people would disagree with that. I think a lot of tuners would also prefer not to see injectors being over 90% duty cycle.

That said...fuel pump? On stock turbo? Ummmm...probably not. Maybe if the filter sock is clogged/really dirty or something.

Thanks!
verkion

08-14-2012, 09:59 PM	#12
bigstakk Forum Lackey Join Date: Apr 2008 iTrader: (100) Location: SoCal Posts: 1,773	PM Dino "Kooldino" at Speed Circuit and he will sort you out. GL! __________________ 2010 EVOLUTION X GSR / SSS / NAV / WW RRE /// tuned w/ basic bolt-ons > 343whp/348wtq Muellerized... stage 1 w/ Whiteline rck Enkei raijin 18x9.5+15 w/ 255/40 Hankook v12s

10-03-2012, 05:32 AM	#19
mitsu912 n00b Join Date: Sep 2012 iTrader: (0) Posts: 5	Stock injectors & pump with stock turbo Yes, those saying you can run out of fuel efficiency on the stock turbo right about the edge where your stock turbo loses efficiency ~27-28psi. At 7500 rpms in 5th you are out of gear because you are stressing the shit out of the top end of the motor. Those valve springs aren't rated for that kind of punishment. You're likely experiencing a form of valve float at that point. These motors are so tight in tolerance, if the timing is too advanced you can grenade your motor with piston to valve collision not to mention stretching internals to the point of possible failure and perhaps jacking your BE bearings...

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08-14-2012, 10:21 PM	#13
ACE Ralliart n00b Join Date: May 2012 iTrader: (100) Location: Pittsburgh, PA Posts: 15	Fuel pump is a pretty simple and inexpensive mod. Why not upgrade as cheap insurance?

08-17-2012, 09:56 PM	#18
Natek X-phile Join Date: Jan 2012 iTrader: (100) Location: Pittsburgh (Aliquippa) Posts: 890	Fic 1100 depending on turbo

10-06-2012, 01:05 AM	#20
verkion X-phile Join Date: Oct 2007 iTrader: (100) Posts: 863	I think that old thread...Bryan was saying Injectors were capping out, not the fuel pump. I could be wrong though that's a long time ago. Injectors can cap out with stock turbo. I don't think too many people would disagree with that. I think a lot of tuners would also prefer not to see injectors being over 90% duty cycle. That said...fuel pump? On stock turbo? Ummmm...probably not. Maybe if the filter sock is clogged/really dirty or something. Thanks! verkion

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