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how much power out of 19lb injectors 

 

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Posted: Mon Jan 23, 2006 10:53 pm 
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Well you have to work out why it is pinging and my guess wouldn't be because it is leaning due to the fuel injectors being too small. Even though he is close to the limit at 168rwkw, the AFRs normally don't start leaning up enough to cause issues until 180rwkw or so.
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Posted: Tue Jan 24, 2006 11:23 am 
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Your fuel pump is likely the culprit. At 88 L/Hr it is good for f**k!
Even at 100% duty your 19's need 95L/hr so it's not even enough for them!

Pete.
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Posted: Tue Jan 24, 2006 3:34 pm 
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so if i was say pushing up around 170-180rwkw, could i just get away with a larger fuel pump for now, if it was leaning out up high? until i save up for injectors/maf?
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Posted: Tue Jan 24, 2006 3:57 pm 
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Or get a fuel pump, fuel reg and hope the pressure is enough.. Plenty do it in the states.

 

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Posted: Tue Jan 24, 2006 4:06 pm 
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One Drone wrote:
Or get a fuel pump, fuel reg and hope the pressure is enough.. Plenty do it in the states.

24 and 30 Lb are cheap as over there..They are going away from FMU's now and tuneing properly....

 

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Posted: Tue Jan 24, 2006 6:11 pm 
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Yes a larger pump could keep you safe but don't immediately get a great bloody big 200 odd L/hr pump unless you are going to use it. All that does is needlessly circulate fuel up to the engine and back which makes it hot. When the fuel is hot you will get excess tank vapours which will saturate your charcoal canister and have you sniffing the fumes. Plus you will wear out your pump and injectors faster.
If you are only going to go the next step and use 24's you want a 110L/hr pump to operate them at a safe 90% max duty cycle.

Cheers,
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Posted: Tue Jan 24, 2006 11:00 pm 
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Yeah i think its my fuel pump aswell, getting an engine cut out when cornering hard and at full throttle acceleration

Wat is the part # for the bolt in 255 walbro pump

 

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Posted: Sun Jan 29, 2006 5:23 pm 
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[quote="XR9UTE"]Yes a larger pump could keep you safe but don't immediately get a great bloody big 200 odd L/hr pump unless you are going to use it. All that does is needlessly circulate fuel up to the engine and back which makes it hot. When the fuel is hot you will get excess tank vapours which will saturate your charcoal canister and have you sniffing the fumes. Plus you will wear out your pump and injectors faster.
If you are only going to go the next step and use 24's you want a 110L/hr pump to operate them at a safe 90% max duty cycle.

Is it possible to remove/ Block the return line when upgrading pump & reg?
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Posted: Sun Jan 29, 2006 5:23 pm 
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[quote="XR9UTE"]Yes a larger pump could keep you safe but don't immediately get a great bloody big 200 odd L/hr pump unless you are going to use it. All that does is needlessly circulate fuel up to the engine and back which makes it hot. When the fuel is hot you will get excess tank vapours which will saturate your charcoal canister and have you sniffing the fumes. Plus you will wear out your pump and injectors faster.
If you are only going to go the next step and use 24's you want a 110L/hr pump to operate them at a safe 90% max duty cycle.

Is it possible to remove/ Block the return line when upgrading pump & reg?
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Posted: Sun Jan 29, 2006 10:26 pm 
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mickoxhxr8 wrote:
Is it possible to remove/ Block the return line when upgrading pump & reg?

You could possibly convert it to a "returnless" fuel system? Not sure how feasible this would be though....and no real benefit that i can think of.

Why would you want to block the return line?
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Posted: Sun Jan 29, 2006 11:14 pm 
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Yeah not really a good idea to block the return line, the conversion would be pretty complicated and as far as I am aware, returnless systems have a number of draw backs and require specific fuel pumps. Over-circulating fuel due to a bigger fuel pump is an issue but isn't worth worrying about if you already ahve the pump. If you still need to buy one, then look at a 155l/hr or 190l/hr one, but if you have the 255l/r one of think you may need it in the future I wounldn't really worry too much.
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Posted: Mon Jan 30, 2006 9:42 am 
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[quote="xr8ute"][quote="mickoxhxr8"]Is it possible to remove/ Block the return line when upgrading pump & reg?[/quote]
You could possibly convert it to a "returnless" fuel system? Not sure how feasible this would be though....and no real benefit that i can think of.

Why would you want to block the return line?[/quote]

To remove recirculation problems as mentioned.
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Posted: Fri Feb 03, 2006 10:54 pm 
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XR8Chic wrote:
I got 193rwkw with 19lb injectors.

Upgraded to the 30's, and with no other mods (other than a retune) got 205.7rwkw


You got that stroker built yet XR8Chic ???????

 

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Posted: Sun Feb 05, 2006 9:54 pm 
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mickoxhxr8 wrote:
xr8ute wrote:
mickoxhxr8 wrote:
Is it possible to remove/ Block the return line when upgrading pump & reg?

You could possibly convert it to a "returnless" fuel system? Not sure how feasible this would be though....and no real benefit that i can think of.

Why would you want to block the return line?


To remove recirculation problems as mentioned.


This would dead head the fuel pump and pressure would go through the roof...not good for both pump life and the calibration would be out the window. You could go to a returnless system but you'd have to switch to a U.S. EECV with this capability because it is a complex system to implement.

Pete.
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