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Question about line sizing and HP rating

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Old Feb 27, 2006 | 11:43 AM
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Default Question about line sizing and HP rating

Ok... here is what I have at the moment... 2001 M6 car. I have Nate's rails, a boost referenced FMFPR, #6 feed line, stock line for return, pump booster, hotwire kit, and racetronics/walbro in-tank pump. The injectors are 60s.

The car has an A&A built forged shortblock and a Pro Turbo Systems turbo kit, with a 76mm GTS turbo.

The car will hit the dyno hopefully late this week for tuning. We are taking bets as to where this system will run out of fuel. Any guesses?

I ordered a Nasty Nate alum. tank so that I can run an external pump and a second pump in parallel to be run from an output on my eBoost controller when the car gets into boost. My question is.... Will that #6 feed line support 800-850RWHP? I don't know that the setup can make that much, but I'd like to work up to maxxing the turbo out on race fuel to see what it is capable of...

Is this the point that a #8 line should be considered? Thanks alot.
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Old Feb 27, 2006 | 12:17 PM
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We've made almost 1000rwhp with dual walbros and a stock fuel line and filter, so I would think a -6 setup would go a good deal further than that.

Larger fuel lines are more critical on low pressure (carbureted) fuel systems.
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Old Feb 27, 2006 | 12:21 PM
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Awesome, thats what I was hoping to hear...

So where do you think that single pump setup I described will run out of steam?
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Old Feb 27, 2006 | 12:40 PM
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-6AN will easily go 850rwhp at 58psi.

My Walbro with a KB BAP maxed at 620rwhp through a T400 trans. LPE has taken them to 750rwhp in a manual car. Dual Bosch or Weldons are the way to go for boost referenced regulators. Gets the most out of the Mototron 60's and will sustain flow at 78psi....which is what you need down the road. Mototrons are great injectors...run a dual pump set for high pressure and they will go over 850rwhp.
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Old Feb 27, 2006 | 11:14 PM
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Nice, thanks alot. I have my fingers crossed for 700RW before the single pump peters-out. I probably won't move to the dual setup until sometime this summer.
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