Single Walbro 400 to replace 255/Bosch 044 combo?
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Single Walbro 400 to replace 255/Bosch 044 combo?
I'm wondering if a single Walbro 400lph in-tank can replace my current Walbro 255 in-tank/Bosch 044 inline setup?
The Bosch is loud as heck, and I would love to simplify the 2 pumps, 2 filters configuration. I used to run e85 in the summertime, but I won't be doing that anymore. Just straight pump gas for me from now on.
Pump gas HP target is high 300's on stock lines.
Any thoughts? Thanks.
The Bosch is loud as heck, and I would love to simplify the 2 pumps, 2 filters configuration. I used to run e85 in the summertime, but I won't be doing that anymore. Just straight pump gas for me from now on.
Pump gas HP target is high 300's on stock lines.
Any thoughts? Thanks.
#2
Re: Single Walbro 400 to replace 255/Bosch 044 combo?
If you are running on pump gas you don't even need the inline Bosch. An in-tank Walbro 255lph is plenty for 400hp on stock lines. I'd just remove the Bosch.
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
93 doesn't require as much pump/injector as E85, keep that in mind OP. A lot of people forget that at times.
The 255 lp should be fine.
Directly from the website.
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
The 255 lp should be fine.
•Walbro High Pressure 255LPH Fuel Pump
•Fits - 1991-1988 4 Cyl. 4 Cyl. 1.5L Wagon
• Includes fuel pump & install Kit - PN# GSS341/GSS341/GSS340 Install Kit - 400-867.
•Supports upto 500 Horse Power!
•Fits - 1991-1988 4 Cyl. 4 Cyl. 1.5L Wagon
• Includes fuel pump & install Kit - PN# GSS341/GSS341/GSS340 Install Kit - 400-867.
•Supports upto 500 Horse Power!
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
Thanks for the replies guys!
Also, I have been looking for a place to post a link to the most awesome inline fuel filters I have ever come across for e85, and this seems as good a spot as any. After a lot of research into e85 filters, these stood out to me even over name brand options, and I'm glad I got one.
http://www.robbmcperformance.com/products/filters.html
I have no business affiliation with this guy whatsoever, I just wanted to pass this along as I haven't see anyone else here on honda-tech post about these (there is no way I'm the first to use one?). I have been using this filter with e85 and pump gas for a few years, and I must say I am impressed. The element is not paper, so it can withstand any chemical you can run through it. It's made of like, copper or brass or something. The element is removeable/back-washable/replaceable, extras run $12. It is 100 micron, and has a high GPH rating which I needed for running e85. I use it pre fuel rail. The element catches everything, and while owning one, I had to replace the element once but will probably do it again this spring just cuz. They look home made on the site because they probably are, but when you actually get it to look at it it's a quality unit. His price on these is what also drew me in.
I just thought I would give back to honda-tech after all these years of taking. Maybe help someone out who is looking for a good E85 filter
Also, I have been looking for a place to post a link to the most awesome inline fuel filters I have ever come across for e85, and this seems as good a spot as any. After a lot of research into e85 filters, these stood out to me even over name brand options, and I'm glad I got one.
http://www.robbmcperformance.com/products/filters.html
I have no business affiliation with this guy whatsoever, I just wanted to pass this along as I haven't see anyone else here on honda-tech post about these (there is no way I'm the first to use one?). I have been using this filter with e85 and pump gas for a few years, and I must say I am impressed. The element is not paper, so it can withstand any chemical you can run through it. It's made of like, copper or brass or something. The element is removeable/back-washable/replaceable, extras run $12. It is 100 micron, and has a high GPH rating which I needed for running e85. I use it pre fuel rail. The element catches everything, and while owning one, I had to replace the element once but will probably do it again this spring just cuz. They look home made on the site because they probably are, but when you actually get it to look at it it's a quality unit. His price on these is what also drew me in.
I just thought I would give back to honda-tech after all these years of taking. Maybe help someone out who is looking for a good E85 filter
Last edited by booboo782; 03-25-2014 at 10:42 AM.
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#8
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
93 doesn't require as much pump/injector as E85, keep that in mind OP. A lot of people forget that at times.
The 255 lp should be fine.
Directly from the website.
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
The 255 lp should be fine.
Directly from the website.
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
If the 044 was rigidly mounted then that's why it was loud... any pump is loud if rigidly mounted.
mount it with rubber between the body and clamps (or the bracket) and you'll never hear it. I mounted my A1000 in car on rubber feet and you can't hear it at all.
but yes all you need is a single 255
as far as filters i like xrp, they have paper or stainless steel high flow elements from 120 microns to 10 microns, plus you can stack multiple elements into one filter body for staged filtration without multiple filter housings. and they support differential pressure gauges between each filter element to monitor filter health and to see if one element is a restriction (or if your fuel quality really sucks)
mount it with rubber between the body and clamps (or the bracket) and you'll never hear it. I mounted my A1000 in car on rubber feet and you can't hear it at all.
but yes all you need is a single 255
as far as filters i like xrp, they have paper or stainless steel high flow elements from 120 microns to 10 microns, plus you can stack multiple elements into one filter body for staged filtration without multiple filter housings. and they support differential pressure gauges between each filter element to monitor filter health and to see if one element is a restriction (or if your fuel quality really sucks)
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
93 doesn't require as much pump/injector as E85, keep that in mind OP. A lot of people forget that at times.
The 255 lp should be fine.
Directly from the website.
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
The 255 lp should be fine.
Directly from the website.
http://walbrofuelpumps.com/1988-1991...-cyl-1-5l.html
(Innocent self-plug): OP, you may want to give this thread a good read.
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
The bsfc numbers have actually dropped lately... given the advancement in engine technology, engine management technology, and better fuels.
most consider the bsfc for a modern, ohc, 4 valve turbocharged and intercooled motor (as well as the new turbo diesels) to be between .42-.48
Supercharged motors have a higher bsfc, around .55 due to the parasitic losses from driving the supercharger. this number is also accepted for modern non intercooled turbo motors.
older engine tech such as pushrod v8s and 2 valve heads are in the .60-.65 range.
however it never hurts to use a higher than needed bsfc when doing fuel system calculations so you have a decent amount of overhead and safety margin.
most consider the bsfc for a modern, ohc, 4 valve turbocharged and intercooled motor (as well as the new turbo diesels) to be between .42-.48
Supercharged motors have a higher bsfc, around .55 due to the parasitic losses from driving the supercharger. this number is also accepted for modern non intercooled turbo motors.
older engine tech such as pushrod v8s and 2 valve heads are in the .60-.65 range.
however it never hurts to use a higher than needed bsfc when doing fuel system calculations so you have a decent amount of overhead and safety margin.
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
A single 255 is more than enough. I made 560whp with a single 255, pte1000s, and e85.
But if youre looking for more info on the 450. Heres a thread...
https://honda-tech.com/forums/forced-induction-16/walbro-450lph-users-unite-3139056/
But if youre looking for more info on the 450. Heres a thread...
https://honda-tech.com/forums/forced-induction-16/walbro-450lph-users-unite-3139056/
#19
I never narc'd on nobody!
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Re: Single Walbro 400 to replace 255/Bosch 044 combo?
The bsfc numbers have actually dropped lately... given the advancement in engine technology, engine management technology, and better fuels.
most consider the bsfc for a modern, ohc, 4 valve turbocharged and intercooled motor (as well as the new turbo diesels) to be between .42-.48
Supercharged motors have a higher bsfc, around .55 due to the parasitic losses from driving the supercharger. this number is also accepted for modern non intercooled turbo motors.
older engine tech such as pushrod v8s and 2 valve heads are in the .60-.65 range.
however it never hurts to use a higher than needed bsfc when doing fuel system calculations so you have a decent amount of overhead and safety margin.
most consider the bsfc for a modern, ohc, 4 valve turbocharged and intercooled motor (as well as the new turbo diesels) to be between .42-.48
Supercharged motors have a higher bsfc, around .55 due to the parasitic losses from driving the supercharger. this number is also accepted for modern non intercooled turbo motors.
older engine tech such as pushrod v8s and 2 valve heads are in the .60-.65 range.
however it never hurts to use a higher than needed bsfc when doing fuel system calculations so you have a decent amount of overhead and safety margin.
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