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Old 03-14-2013, 04:27 PM   #1
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Default Broz - confirm I need a new fuel pump.

Went to the dyno today. A month ago, after having had the car off of jackstands for less than 24 hours and having done no tuning, it did 190 at the wheels and we had to lift at 6200 or so because it was getting lean.

I did some on-ramp tuning before heading back today, and thought I had the high rpm lean tuned it, but that's not the case. It still started to creep up to 12 at 6500, and I couldn't get that to come down. At that RPM I have about 10psi of manifold pressure.

So - this says to me that my stock fuel pump has reached flow/pressure capacity, and I need to upgrade it. The injectors are 550cc, I should have plenty of injector capacity left at only 200rwhp.


The DW300 is the one I want, correct? All the fuels I need, and not as noisy as the walbros? Will carry on with me into the future of built motors and EFR seks? Confirm for me this is the one I want: Deatschwerks DW300 Fuel Pump

Is there anything else I need to get to finish/finalize installation?
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Old 03-14-2013, 04:31 PM   #2
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the dw200 is like the wally 255 and silent.

dont think you want the 300 on stock fpr and pump gas. thats way too much pump
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Old 03-14-2013, 04:34 PM   #3
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Quote:
Originally Posted by Mobius View Post
So - this says to me that my stock fuel pump has reached flow/pressure capacity, and I need to upgrade it. The injectors are 550cc, I should have plenty of injector capacity left at only 200rwhp.
What's your injector duty cycle at redline/max boost? How long since you last changed the fuel filter?
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Old 03-14-2013, 05:50 PM   #4
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What's your injector duty cycle at redline/max boost?
I don't have that information. I'm using an Xede on top of my stock ECU, I modify the MAF signal to the ecu to control fuel. Adding fuel from -2% to +2% in the 6000-7000 max load cells had only a slight effect on the AFR. A 4% swing elsewhere makes a huge difference.

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How long since you last changed the fuel filter?
Within the last couple of years.
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Old 03-14-2013, 06:17 PM   #5
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Quote:
Originally Posted by Mobius View Post
I don't have that information. I'm using an Xede on top of my stock ECU, I modify the MAF signal to the ecu to control fuel. Adding fuel from -2% to +2% in the 6000-7000 max load cells had only a slight effect on the AFR. A 4% swing elsewhere makes a huge difference.
550ccs and the stock fuel pump should be plenty at ~200whp dude. Just my 2c, but it sounds to me like there's a control issue.
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Old 03-14-2013, 06:19 PM   #6
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Quote:
Originally Posted by blaen99 View Post
550ccs and the stock fuel pump should be plenty at ~200whp dude. Just my 2c, but it sounds to me like there's a control issue.
I ran out of fuel from my OEM pump at 190whp with EV1 550s. Changed to a big Walbro and BAM, 300whp.
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Old 03-14-2013, 08:13 PM   #7
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DW300 is ordered and I will install it tomorrow, along with a new fuel filter.
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Old 03-14-2013, 08:14 PM   #8
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I ran out of fuel from my OEM pump at 190whp with EV1 550s. Changed to a big Walbro and BAM, 300whp.
Seriously?

****, a DW order may be in my future then :(.
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Old 03-14-2013, 08:44 PM   #9
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I use a walbro 190hp in my 99 with rx8 injectors and stock fuel pressure.

Been on the car for about 2yrs with no issues.
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Old 03-15-2013, 12:03 AM   #10
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Quote:
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Seriously?

****, a DW order may be in my future then :(.
20-year old fuel pumps don't last forever, and we both know hearts can change.
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Old 03-15-2013, 12:13 AM   #11
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I'm kinda curious how your stock nb fpr will handle the dw300 on a returnless system
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Old 03-15-2013, 12:28 AM   #12
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Quote:
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20-year old fuel pumps don't last forever, and we both know hearts can change.
Hustler, you made me press the button on a new DW fuel pump tonight.

Damn you. :(
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Old 03-15-2013, 12:51 AM   #13
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I'm kinda curious how your stock nb fpr will handle the dw300 on a returnless system
Pffftt. it's not returnless ... it's just that the return is right after the pump.
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Old 03-15-2013, 11:55 AM   #14
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yeah yeah you know what I mean

in for results of the (hopefully) stable fueling
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Old 03-16-2013, 06:54 PM   #15
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Dem has a decent writeup in his build thread about converting to return on an nb.

I would have already done it, but lazy.
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Old 03-19-2013, 01:46 PM   #16
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Good choice on the DW pump.
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Old 03-19-2013, 01:48 PM   #17
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CAN YOU PLEASE STOP PLUGGING YOUR PARTS IN EVERY SINGLE FREAKING THREAD NO MATTER WHAT THE DISCUSSION IS ABOUT?

Seriously man, I like you but that is SO SUPER ANNOYING ITS GOING TO **** PEOPLE OFF AND DRIVE AWAY POTENTIAL CUSTOMERS.

Btw he already got a dw.
You would have read that if you paid attention to the thread.

Please stop being a spambot.
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Old 03-20-2013, 03:03 AM   #18
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Quote:
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Good choice on the DW pump.
Where is he plugging his own parts?
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Old 03-20-2013, 04:51 AM   #19
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I over looked the thread and Informed the OP of the sale we are having.
I since the corrected the my statement. No worries Though Just trying to save a guy some coin.
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Old 03-20-2013, 09:40 AM   #20
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Any reason to not switch to return style? It looks like the NA fuel return hardline should be close to fitting on the NB and that it may have the proper ports on the sender already, if not an NA sender looks like it should bolt right in.
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