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Denso 300LPH pump?

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Old 08-17-2010 | 07:42 PM
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Default Denso 300LPH pump?

Starting to piece things together for my turbo upgrade on my 03 triple S...

I think I'm right at the cusp of the limit of the 255 with my current goals and I don't like the thought of running dual 255s, I've also read a couple stories of them failing frequently. I read that the 255 supports about 550rwhp which is exactly what my goal is. I don't want to skimp out and find out I don't have enough fuel, I suppose I could always throw an inline in there but I'd rather do it right the first time.

http://www.densofuelpump.com/

This one caught my eye, I'm not sure what size fuse currently protects the fuel pump so obviously that would be important, I could install a relay and do all of that jazz or do the hotwire trick though if this is the proper solution.

Here is the listing from the website:
* 510 LPH @ 10 PSI @ 14 Volts 7.7 Amps
* 470 LPH @ 20 PSI @ 14 Volts 8.3 Amps
* 430 LPH @ 30 PSI @ 14 Volts 8.9 Amps
* 390 LPH @ 40 PSI @ 14 Volts 9.5 Amps
* 350 LPH @ 50 PSI @ 14 Volts 10.5 Amps
* 305 LPH @ 60 PSI @ 14 Volts 11.5 Amps
* 258 LPH @ 70 PSI @ 14 Volts 12.5 Amps
* 200 LPH @ 80 PSI @ 14 Volts 13.5 Amps
* 140 LPH @ 90 PSI @ 14 Volts 14.2 Amps
* 320 LPH @ 30 PSI @ 12 Volts 7.3 Amps
* 273 LPH @ 40 PSI @ 12 Volts 8.3 Amps
* 225 LPH @ 50 PSI @ 12 Volts 9.3 Amps
* 180 LPH @ 60 PSI @ 12 Volts 10.4 Amps
* 120 LPH @ 40 PSI @ 9 Volts 7.1 Amps
What do you guys think? Anybody used one of these before?

Thanks in advance!!
Old 08-17-2010 | 09:15 PM
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I use them exclusively after buying a brand new Walbro from Racetronix that was bad.I was told "sorry,no warranty,no refunds" That really pissed me off.And whats worse is that Jack was on the sites trying to blame Walbro failures as installer error.And also claiming that he had no complaints on failures when he knew that was a LIE.

Go Denso and dont look back.With 10 gauge wiring run to them,I have seen flow rates of 330lph.Once you have one in your hand,you will see immediately that it is alot beefier than a POS Walbro.
Old 08-17-2010 | 09:37 PM
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Originally Posted by 1faste55
... POS Walbro.
That's what they should be called from now on.
Old 08-17-2010 | 09:42 PM
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Cool thats what I'm thinking. I've read the threads about the reliability of the Walbros and that has steered me clear of them.

What sock do you run with the denso? The one in the pictures on the link I posted look pretty cheap.

Wiring doesn't scare me, tap the power wire on the existing wiring, to pull in a relay, run 10ga along the frame and terminate. How difficult is it to fit the 10ga through the sending unit? I've seen a couple threads here, but I'm not very excited about sealing with RTV / silicone and grommets.

Thanks for your help
Old 08-17-2010 | 10:02 PM
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Denso makes top notch electronics, I wouldn't hesitate to run anything that they make that fits my truck. I'm currently running Denso front O2 sensors FWIW.
Old 08-17-2010 | 10:17 PM
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Denso actually makes the o2 sensors for GM trucks.At least the AC Delco's I bought were Denso's with Denso part #'s and AC Delco box.

You want to run 10ga off the back of the alternator,the hottest spot for voltage.Its called a hot wire kit.

Any vendor who sells Walbro is selling you somthing that is a known piece of **** that will not be warrantied even if its bad out of the box!!

You run the Denso with the sock it comes with.
Old 08-17-2010 | 11:01 PM
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Sounds like I'll be going with the Denso pump next time around. I always had good luck with my Walbro setup but it was always a failure in the back of my mind
Old 08-17-2010 | 11:06 PM
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Just bought a Denso.

It has always been in the back of my mind with my stocker too, I don't want to be that guy whos **** dies in an intersection and blocks traffic, nor do I want to be the guy who grenades a top end because the walbro had a hiccup when going WFO

Thanks for the advice guys
Old 08-18-2010 | 01:04 AM
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***STICKY!!***

I've never recommended the Walbro. Seen too many problems, why take the chance?
Old 08-18-2010 | 01:31 PM
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The link I posted doesn't have any in stock, it is backordered due to ship out on 8/31. No big deal to me and the price was right

Hope this helps those who are looking to get one ASAP, doesn't say anything on the site.



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