hey guys...I'm new in here....I'm building a turbo teg right now and I need an inline fuel pump...Should I use an inline pump?>>how much do these cost???
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hey guys...I'm new in here....I'm building a turbo teg right now and I need an inline fuel pump...Should I use an inline pump?>>how much do these cost???
Thanks Turismo... I appreciate the Bone.
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'93 Civic Si H/B with B18C1, JRSC @ 8psi
Best 1320: 12.68 at 110 mph
What if the difference between the Holley 255L and Walbro 255L. Is the Walbro better with high pressure ? And is there a difference between the two at 45 psi ?
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To 24 PSI, and beyond !
HS Le Club
No, no, no drag3! You have to use an inline pump. The Walbro pumps cannot flow the volume of fuel necessary at the elevated fuel pressures created by the FMU to feed your hungry turbo beast. Trust me, I tried a Walbro "high-pressure" 255L/hr in-tank pump and it leaned out on me at higher RPM. I was lucky I didn;t blow up. YOu need a Bosch 600hp inline pump. They are physically 3X the size of the Walbro pumps and will handle all your high-pressure fuel needs. You can mount it underneath your car very out of the way where it will not interfere with anything else and act totally transparently like any fuel pump should.
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Mark - Darth Boost - Turbo Mafia
98 Pearl Black GS-R, DRAG Gen. 3 Turbo
13.2 at 114MPH (GTech/Pro w/Drag Radials)
in my opnion u should get an intank, inline is just another prob to have, i have the walbro 255l high pressure pump and am very happy with it
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93 delSol LS Hybrid Turbo
e-mail JR Civic if you need the Walbro 255HP.
Hey,
I got that Holley in-tank fuel pump. What psi is it good for? Has anyone actually done the calculations necessary to se the capacity of this pump or any other pump? I got an F-Max on a B18C1 w/ stock injectors. I want to run 9psi using a FMU and the Holley fuel pump. Am I asking for trouble?
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1992 Old School Si Hatch
1995 Civic DX Coupe w/ Turbo B18C
The std hipo walbro and the high pressure version both pump the same volume. The higher pressure pump puts out less volume as the pressure increases, so it's not worth a flip.
Neither pump is worth a damned. Get up to high rpm and high loads and you'd better drive by the fuel pressure gauge and be ready to pedal it fast.
The Bosch pumps are the only wat to go. Pay the price, install it, and you'll never need to worry about fuel delivery again.
I think the Holley in-tank unit is just a rebadged Walbro pump.
Both Walbro pumps move less volume as the pressure rises. The standard 255lph Walbro pump reaches nearly zero volume around 90 to 95psi while the high pressure version is running dry at around 110 to 115psi. I don't think either are up to the task for our applications when using stock injectors. However, both pumps can supply plenty of fuel at lower pressures.
Suppose your motor's putting out around 300HP. You'll need say, 120lph of fuel. At 60psi both pumps are moving over 180lph, and at 70psi the high pressure pump is still moving over 180lph while the standard pump is at just a bit over 110lph (a bit shy of what's needed). Anyhow, you get the idea.
Hey Drag 3 Mark C knows from experience, and Beaver has it so right on the head it's ridiculous. Get the Bosch, it's not that hard to install and your beast will never be thirsty again.
p.s. I'm running one 2. If you want one e-mail me and I can give you the leads on 2 sources. (thanks Marky Mark)
Mac
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The Import Avenger...hehe
[This message has been edited by MTRS the 1st (edited February 17, 2000).]
I've actually heard the bosches aren't all that sweet either, at least the one with the Drag Gen2 kits. SX and Paxton make some massive pumps. I use a Pierberg (Porsche) pump myself, it's good to 600hp and I can barely hear it at idle with the radio off.
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Ryan Earl
'99 Turbo SH
NTPOG - North Texas Prelude Owners Group
My Page
I am going to get the paxton Kamikaze or an SX unit......that ought to fill my needs nicely!!! http://www.hostboard.com/ubb/smile.gif http://www.hostboard.com/ubb/smile.gif http://www.hostboard.com/ubb/smile.gif
thanks guys for your opinions....where do you mount the fuel pump..My buddy has it behind his throttly body...is this a good spot for it?? thanks again for the help...I just don't want my motor to blow by goin the cheap way
The Paxton pump ain't all that good either. We had two fail during my dyno testing. The "cool" street racers up in motown say the same thing.
Yeah, when you start getting up into triple digit fuel pressure, it's really just time to get bigger injectors. Injectors don't really work that well under such extreme conditions.
Hey, I have injectors 30 cc/min shy of being twice as large as stock (550 vs 290) and my car idles fine with the right gizmos hooked up http://www.hostboard.com/ubb/smile.gif
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Ryan Earl
'99 Turbo SH
NTPOG - North Texas Prelude Owners Group
My Page
Heretic,
Bt "right gizmos," do you mean the AFC you have. I checked out your website and that's the only thing you have. Does the AFC control fuel delivery at idle? Thinking of getting one myself...
OK, I am not sure what the requirements are for your DRAG 3 Turbo kit, so I cannot comment on whether or not a Holley/Walbro (Holley buys them from Walbro -- I have boxes from BOTH companies with the same product inside). If the fuel pressures get really high, then this pump may not deliver the right about of volume. Beaver is TOTALLY off on his assesment... Here is a comparison between the Walbro GSS-317 (Jackson Racing 255 lph) and the GSS-342 high pressure 255 lph pumps:
Pres. flow(317) flow (342)
40 psi........214 lph.....220 lph
50............198.........207
60............172.........194
70............126.........181
80.............55.........165
90..............0.........139
100...........(--)........113
110...........(--).........71
120...........(--).........18
This data is from the Walbro Tech office.
Good luck.
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'93 Civic Si H/B with B18C1, JRSC @ 8psi
Best 1320: 12.68 at 110 mph
[This message has been edited by JRCivic (edited February 18, 2000).]
JR, from looking at that chart, I was wondering - when is the fuel pressure going to be past 90 psi? In other words, when would it be a good idea to invest more into the fuel system? (ie. injectors, management system)
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Is it obvious that I'm the new kid?
93 B18C Civic Coupe
Soon to be installed: Jamex sportsline shocks, Ground control coilover conversion, chikara front upper strut brace, NOS?
JRCivic,
What Walbro says and the way the pumps function in the car are two different things.
Their pumps are adequate for 200-230 hp at the tires, but ask them if they'll insure your engine should you need more. I think they'll come up short, just like their pumps.
I have to agree with MarkC and MTRS the 1st. Like Mark said, you will lean out.
MTRS stronly recomends it aswell because he has it.
The Bosch is a inline fuel pump, but through Endyn they have it modified to fit intank.
I personaly like the bosch over the Walbro, but everyone has an opinion and I respect them all.
art
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Boost happens
Rev-Hard Turbo kit
Benson's built Bottom end comming soon!!
Beaver... if you know of a company that produces fuel pumps who GUARANTEES that if your motor fails (fuel related obviously), they will pay for all of the damage... please share it with me. I will buy it RIGHT NOW !!!
Again, I am unsure of the fuel demands of a Turbo kit, but assuming that they are similar to the Superchargers', the Walbro pump should easily accomodate well over 300 HP.
Remember, my own car has more than 300 hp at the flywheel, and my pump works JUST FINE...
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'93 Civic Si H/B with B18C1, JRSC @ 8psi
Best 1320: 12.68 at 110 mph
Stock injectors? What fuel pressure? And you've dyno'd your car? 300hp, even to the crank, is a lot of power for 8 psi on a supercharger. Hell, it's a good amount for a turbo B18C (at least in it's stock form).
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Ryan Earl
'99 Turbo SH
NTPOG - North Texas Prelude Owners Group
My Page
[This message has been edited by Heretic (edited February 22, 2000).]
Sounds like a crock to me. The Walbro company has sent several "cures" to our problems and they've all crapped out.
I run RCE 370 cc injectors with my JRSC and their pumps all run out of steam at 15 psi in the 5500 rpm range and I'm only using 90 psi. My fuel line is half inch to the rail and it's .375 on the return, so there's little restriction.
The problem is not electrical either. If I had a dollar for every hour I've spent trying to make a Walbro work, I could have bought another JRSC.
I'mlooking for low twelves or high elevens ( I've run 12.42 @ 113 running out of fuel), so I know it's there.
I think that my new pump, safeguard and 2.5 to 3.0" tapered collector on the kamikaze should do it. I'll know this weekend.
I know I'm late but I wanted to post a pic of the Bosh and Walbro from the endyn site.
http://www.theoldone.com/components/...s/fuelpump.jpg
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Boost happens
Rev-Hard Turbo kit
Benson's built Bottom end comming soon!!