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snort turbo running issues 

 

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 Post subject: Re: snort turbo running issues
Posted: Wed Nov 11, 2009 11:14 pm 
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bunghole wrote:
I also had a walbro 255lt pump and it was a waste of money. They arent really suited to the application your using it for.

That's not the Walbro GSS341 is it? I have one of these which i'm going to use with my turbo setup, it says it's good for 550ish horsepower, am i missing something?
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 Post subject: Re: snort turbo running issues
Posted: Thu Nov 12, 2009 8:55 am 
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fordman351 wrote:
bunghole wrote:
I also had a walbro 255lt pump and it was a waste of money. They arent really suited to the application your using it for.

That's not the Walbro GSS341 is it? I have one of these which i'm going to use with my turbo setup, it says it's good for 550ish horsepower, am i missing something?


thats what im running... im interested as to why it would be no good??
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 Post subject: Re: snort turbo running issues
Posted: Thu Nov 12, 2009 9:01 am 
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Apparently the walbro's cant deal with the super high fuel pressures that the snort 12:1 reg's create.

They can pump the fuel required to make 550hp but not at super high pressures.
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 Post subject: Re: snort turbo running issues
Posted: Thu Nov 12, 2009 9:58 am 
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There is a lot of confusion about these Walbro pumps. They have a great rep OS.

First, there's a low and high pressure version, and two flow variants. The non HP one will not work well with an FMU or high rate rising reg, and I think it's the cause of the 'bad rep' they seem to have. See this chart for why:

Code:
[Pump Model] [Battery Voltage] [Test Pressure] [Current Draw] [Flow]

Walbro "190" LPH GSS-250 12.5V 43psi 6.0amps 168.45 Ltr/Hr
Walbro "190" LPH GSS-250 12.5V 58psi 7.0amps 145.11 Ltr/Hr
Walbro "190" LPH GSS-250 12.5V 73psi 8.0amps 88.96   Ltr/Hr 

Walbro "190" LPH GSS-250 14.0V 43psi 6.5amps 208.83 Ltr/Hr
Walbro "190" LPH GSS-250 14.0V 58psi 7.5amps 162.78 Ltr/Hr
Walbro "190" LPH GSS-250 14.0V 73psi 9.5amps 104.10 Ltr/Hr
 
   
Walbro "255" LPH GSS-317 12.5V 43psi 7.5amps 229.02 Ltr/Hr
Walbro "255" LPH GSS-317 12.5V 58psi 9.0amps 201.89 Ltr/Hr
Walbro "255" LPH GSS-317 12.5V 73psi 10.5amps 147.00 Ltr/Hr

Walbro "255" LPH GSS-317 14.0V 43psi 8.0amps 261.83 Ltr/Hr
Walbro "255" LPH GSS-317 14.0V 58psi 10amps 230.92 Ltr/Hr
Walbro "255" LPH GSS-317 14.0V 73psi 11.5amps 182.97 Ltr/Hr
 

Walbro "255 High Pressure" LPH GSS-342 12.5V 43psi 7amps 233.4 Ltr/Hr
Walbro "255 High Pressure" LPH GSS-342 12.5V 58psi 9amps 210.10 Ltr/Hr
Walbro "255 High Pressure" LPH GSS-342 12.5V 73psi 10.5amps 189.3 Ltr/Hr

Walbro "255 High Pressure" LPH GSS-342 14.0V 43psi 8amps 264.4 Ltr/Hr
Walbro "255 High Pressure" LPH GSS-342 14.0V 58psi 9.5amps 242.9 Ltr/Hr
Walbro "255 High Pressure" LPH GSS-342 14.0V 73psi 11amps 220.8 Ltr/Hr


Secondly, there are chinese knock offs, including ones with authentic looking manuals and stamps on the pump. If they have metalic gears when you look in the inlet hole, it's generally legit. Look around and avoid getting ripped off, watch out on ebay.

Finally, based on experience, a Bosch 040 will not flow enough fuel for a boosted 4L (there are some false specs around, but they only actually flow 102LPH). You need an 023, or a 044 with an in-tank kit.

Jason
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 Post subject: Re: snort turbo running issues
Posted: Mon Nov 16, 2009 10:58 am 
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Dansedgli wrote:
Apparently the walbro's cant deal with the super high fuel pressures that the snort 12:1 reg's create.

They can pump the fuel required to make 550hp but not at super high pressures.



Thats exactly right.
They can not deal with the amount of pressure needed.
Thay can flow 550hp IF you are running larger injectors becasue there wont need to be as much pressure in the fuel lines.

But if you have stock injecters like i do there needs to be a huge amount of fuel pressure to supply fuel into the engine. The walbro can only handle up to 6.5psi using the snort setup, as what happened to me when i was getting it all dyno tuned.

Hope this helps

 

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 Post subject: Re: snort turbo running issues
Posted: Tue Nov 17, 2009 10:46 pm 
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yer cheers!but still not quite at that stage after changin the head gasket tonite it seems the motors turned into a milkshake maker..coolant gettin into oil yay :( when the head was off there were no visual signs of damage to the chambers n only very very slightly warped ead, with the straight edge n feeler gauges was under max spec so that seemed ok..so ive got the coolant pressure tester on while its drainin overnight with a clean container underneath see if fresh coolant will come out but fingers crossed may be just coolant from when the head came off/blew last time but is very milky so not holdin my breath..but the good news is that i found the wastegate actuator has a 10psi spring in there so found the reason for detonation i was under the impression the turbo snort provides should be setup for 6pound but anyway thats sorted now..so the nightmare continues but i will win!!
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 Post subject: Re: snort turbo running issues
Posted: Tue Nov 17, 2009 11:18 pm 
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Hey man
as soon as you get it all sorted go get it j3 chiped and tuned.
It will save you a lot of hassle in the future.

 

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 Post subject: Re: snort turbo running issues
Posted: Sun Dec 13, 2009 4:14 pm 
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mushy wrote:
well yesterday i got her runnin pretty well gapped the plugs new o2 sensor n put a lot more timin in her n she ran pretty well still not perfect had detonation on high load/full throttle but runnin 20times better than before...but today the nightmare continued when i was tryin new timing again low n behold the headgasket went...happy days, n also had a vacuum/boost gauge on today to check boost n the effen thing would go full boost i mean the gauge only wrent to 10psi but it would just spike right to the end so i geuss thats not gonna help the matter.the line to the wastegate was on n fine, also used this line to T in the gauge so it is recievin manifold pressure, tried movin the gate arm seems to be fine springs back n all, so s**t i dunno i geuss first things first a head gasket was goin o use the au metal shim gaskets but the compression i have atm is already above factory 9.5:1 when comp tested got bout 13-1400kpa (200psi) n i think the au gaskets are slightly thinner but stronger..but after thats sorted i geuss check the wastegate operation with somethin opposite to a mighty vac ive never seen one that can give out +ve pressure tho any ideas?..n then T in a boost controller into the line set to low n see how it is then.
cheers fellas!
Are you testing with a wideband o2 sensor? Sounds like you went too far / aggressive with the timing. Good luck with it.
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 Post subject: Re: snort turbo running issues
Posted: Mon Feb 08, 2010 1:23 am 
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how'd ya go mushy??? have ya got the new head gasket in yet an running?? Whats been happing with the prodject??
jus wanted to know how u found out u had a 10psi spring in ya gate?
Ive got a 50mm external gate from snort an wanted to check wat spring i had? (its second hand).
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 Post subject: Re: snort turbo running issues
Posted: Sat Feb 13, 2010 12:14 pm 
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galapogos01 wrote:
Finally, based on experience, a Bosch 040 will not flow enough fuel for a boosted 4L (there are some false specs around, but they only actually flow 102LPH). You need an 023, or a 044 with an in-tank kit.

Jason


this concerns me now as im running a 040

from the bosch website

Bosch 0 580 254 040 In Tank Fuel Pump
Bosch 040 fuel pumps are universal style in tank fuel pump replacements recommended for vehicles exceeding OE specifications. The Bosch 040 fuel pump is one of the only in tank fuel pump that can be compared with the Walbro 255LPH High Pressure series fuel pumps for use in vehicles with up to 700 horsepower.

Bosch 040 Fuel Pump Specs:
Bosch Part Number: 0 580 254 040
Minimum Current: 12 Volts
Operating Pressure: 94 PSI (6.5 Bar)
Minimum Flow @ Outlet: 80 GPH (300 LPH)
Fuel Pump Location: In Tank
High Temperature Reduction: 8 GPH (30 LPH)
Weight: 930 Grams (2.05 Pounds)

Fuel Pump Connections:
Inlet: Open Base
Outlet: M10 x 1.0
Electrical: Positive M6 / Negative M5


this is how i chose the pump, seemed ideal

are we to understand these specs are wrong?
not having a go at you mate, just would have thought bosch would have the right specs for their product

concerning indeed
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 Post subject: Re: snort turbo running issues
Posted: Mon Feb 15, 2010 12:00 am 
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ok seems we are both right kinda, the 102lph rating is correct however that is measured @6.5bar! interestingly they only quote the flow rate of the 044 @4bar

so yeah, who knows
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