Lesson learned
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From: Glen Carbon, IL
Lesson learned Stock fuel rail can't handle much more than 500rwhp. I burned 3 brand new AR94 plugs last tuesday at the track. I priced stand alone systems from sponsors here, but thought that I could put a stand alone together for 1/2 the price. So far I have about $295 shipped into my stand alone minus fuel lines. I'll post some pics when it's finished. It won't be a hack job either.
Perhaps the fuel pump (how old is the fuel filter?) or Fuel noid is at its limit?
Stock fuel rail can't handle much more than 500rwhp. I burned 3 brand new AR94 plugs last tuesday at the track. I priced stand alone systems from sponsors here, but thought that I could put a stand alone together for 1/2 the price. So far I have about $295 shipped into my stand alone minus fuel lines. I'll post some pics when it's finished. It won't be a hack job either.
Cool deal, post a parts list when you get it together if you dont mind.
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From: Glen Carbon, IL
Part Number Part Description
RCI-2010A ALUM 1 GALLON FUEL CELL W/FOAM 1
MAA-4305M FUEL PRESSURE REGULATOR
SUM-220846 8AN TO 3/8 NPT ADAPTER 2
SUM-800199 GAUGE FUEL PRES LIQUID FILL 100 1
SUM-G3138 ELECTRONIC FUEL PUMP 1
I don't think that just because you burned some plugs you can instantly point the finger at the rails. I bet there are numerous people making well over 500 or even into the 600's with stock rails. Its more about the fuel pump itself and the tune. I am making around 500 hp or maybe a little more and my car runs like a top and has not burned a plug yet. I have my tune setup pretty conservative though and pulling plenty of timing which is crucial with nitrous.
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Thread Starter
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From: Glen Carbon, IL
I don't think that just because you burned some plugs you can instantly point the finger at the rails. I bet there are numerous people making well over 500 or even into the 600's with stock rails. Its more about the fuel pump itself and the tune. I am making around 500 hp or maybe a little more and my car runs like a top and has not burned a plug yet. I have my tune setup pretty conservative though and pulling plenty of timing which is crucial with nitrous.
This isn't my first rodeo fellas. I keep the car tuned very conservative. Tell me that 15* of timing with a 50/50 mix of 93 and 110 is too much timing on a 200 shot. My wideband is on bank 2 and read 11.9-12.0 all the way down the track. Bank 1 went lean and not having a wideband on that side, I never saw it. I don't need anyone to troubleshoot this for me, I already have. There is no other explanation. The plugs on bank 2 were perfect.
I made about 500rwhp on a 125 dry shot and have sprayed up to a 175 dry without any issues except traction. I added a 2nd stage (wet) for traction issues. The instant demand of fuel from the 2nd stage (wet) leans out bank1 and burns plugs. My choice was to upgrade the fuel rails and/or move on to a stand alone. I opted for the stand alone since it gives me more room to grow on the 2nd stage.
IT was not lack of fuel. Incorrect amount of fuel and timming did it. put the best pump in the world on and 3/4" rails with -12 line and if the tune ups not right its going to do it again. blockage or weak pump caused it. the lines and rails can take over 600rwhp. we have been at 700 but wouldn't do it on a customers car.
--ShiznityZ28
--ShiznityZ28
the side the wet kit ties in is also the same side where the fuel is fed in. if it was lack of fuel the pass rear plug would be gone first. the cross over in the fuel rail is the restriction that shoes up around 700 rwhp or a little more. It was the tune. what was a/f what was timming at? what does the car make na?
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From: Glen Carbon, IL
the side the wet kit ties in is also the same side where the fuel is fed in. if it was lack of fuel the pass rear plug would be gone first. the cross over in the fuel rail is the restriction that shoes up around 700 rwhp or a little more. It was the tune. what was a/f what was timming at? what does the car make na?
Stock fuel rail can't handle much more than 500rwhp. I burned 3 brand new AR94 plugs last tuesday at the track. I priced stand alone systems from sponsors here, but thought that I could put a stand alone together for 1/2 the price. So far I have about $295 shipped into my stand alone minus fuel lines. I'll post some pics when it's finished. It won't be a hack job either.
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From: Glen Carbon, IL
Makes around 380 n/a. Dry nozzle on the side of the airlid on drivers side. Wet nozzle in the bellow on the passenger side. Both jetted for 100 rwhp. 15* timing on 200 shot, 50/50 mix of 93 octane and 110 octane. Plugs 1 & 5 were the worst, 3 started eating the electrode, 7 was just black. 2, 4, 6, 8 were perfect. This is the same tune that I used all last season without problems. The MAF was a little dirty imo. The fuel pump and fuel filter have about 4k miles. I am going to install a new fuel filter. It makes more sense to me that the instant lean condition would be 1, 3, 5, 7 b/c you are pulling fuel from that side regardless of the feed being on that side. I will post results even if I am wrong.
What does an AR94 plug cross to in an NGK as far as heat range goes? If im not mistaken its about equal to a 7 heat range? And you are wondering why you are eating electrodes????? Projected tip and too hot of a heat range for what you are trying to do. With the cylinder pressure increase of the 200 shot i wouldnt run anything less than a Ngk R5671A-8...9 would most likely be ideal. Yes I know its a gasket seat. it will pull the porcelain out of the chamber just a hair more which will work fine.
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From: Glen Carbon, IL
Sit back and listen to what you are saying....If the driver side is lean..ie very little fuel in the rail...how is it the other side is fine when you have to have fuel to get to the other side? You're not making any since. And Shiznity is on to something but you are being hard headed and not listening. If fuel is being ripped off by the fuel solenoid then there wouldnt be ANYthing for the other side to receive since it has to crossover from the driver side....think about it. Open your eyes a little bit as well.
Being that I have a Racetronix kit with hotwire. I think that it's possible that I am close enough to it's max to cause this.
This was a lean condition.
How does one bank go lean, while the other bank is perfect? Is it a coincidence that the bank that went lean is the same side that is tapped for the wet kit? I am going to troubleshoot the main fuel system while I'm at it. I am going to install a bung on bank 1 and hit the dyno to see what's going on with it.
Last edited by 02 BLK WS6; Apr 5, 2009 at 05:13 PM.