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Old 08-03-2010, 12:19 AM   #21
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here's some read for you guys in case you havent seen this page before:
http://www.stealth316.com/2-fuelpumpguide.htm

i'm into old school audio gear, and much like audio gear i feel that with most automotive things, size & weight matters (oh yeah) girth too

anyway, you can see how massive most of the quality OE pumps are
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Old 08-03-2010, 11:45 AM   #22
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Quote:
Originally Posted by 18psi View Post
Also they did a study where a bunch of people using e85 for long periods of time on their walbro were offered new pumps for free if they sent in their old ones for walbro to take em apart and see what the damaging effects, if any, e85 had on them. Looking for the results of that now.
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one thing to be sure to do, which most people neglect to do, is run heavy gauge wiring to your pump.. sufficient of powering it. i'de suggest running a relay setup with ~14ga wire direct to the pump. you'll obviously need a larger fuse to match for the increased current draw and heavier gauge wiring.

good luck
This is great advice. I've got my Walbro set up in this manner with a 10ga wire in my Talon, and it helps provide full current to the pump all the time. Check the charts on the link that old_s13 provided...pretty dramatic difference in flow with just a couple volts variation.
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Old 08-03-2010, 01:53 PM   #23
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I am not sure if the NB is different than the NA but I installed my Walbro 255 in no time but the 255 is a bit taller than the 190 so I had to trim about a half inch off the hard line. I removed the pump trimmed of the hard line measured twice cut once. I replaced the sock with a new oem one the miata one is the same. No need for a new connector because they use the same one ( I did run new wire from the connector to the pump of 14ga. just to be sure I had to de-pin the connector and put the new wires in then back together), Then get a few inches of high pressure fuel injector line and two of the good fuel injector clamps put the line on and the two clamps reinstall and your done. I also have a bunch of friends with any thing from a LS1 nitrous mustang to supra's to 240's and they all run Walbro 255's the Supra has twin 255's but no one has had a problem. I have seen one burn up but only after about 5 years on a turbo SC300.
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Old 08-03-2010, 02:02 PM   #24
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These friends you speak of,
do they run their walbro's with e85?
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Old 08-03-2010, 02:38 PM   #25
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Yes the there are two supra's on E85 the LS1 mustang is on pump gas and cam2, the 240 is on pump and cam2. The SC300 is on E85 and on pump gas he has two separate maps and sets of injectors. There have been no problems with the pumps at all the one supra put down just over 800 whp and has twin walbro 255's at 60 PSI. I have a lot of faith in these pumps other than they are loud witch to me is good because if you do have a problem with the pump you can hear if it is running or not.
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Old 08-03-2010, 02:39 PM   #26
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Quote:
Originally Posted by 18psi
These friends you speak of,
do they run their walbro's with e85?
I know that's not directed to me, but to follow up on my earlier post: Everyone I know with an e85 car has a Walbro in their tank, either working on it's own or feeding a Bosch 044. I don't think you need to worry about it. Walbros have been used with e85 by local guys for years and they are fine. And when they occasionally die it tends to be a gradual loss of pumping capacity, which will be reflected in your afr's. If you tend to keep an eye on that gauge anyway, you'll know if there's a problem at any point.
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Old 08-03-2010, 02:42 PM   #27
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Absolutely. I keep an eye on afr's constantly.
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