Fuel starvation, who else?

phunk · 08-02-2011, 03:28 PM

OH so close here. Our full road-race solution is completely built and ready for testing. we also have a significantly less expensive street solution that should greatly reduce the problem for street drivers that like to take those ramps at 1+ g's... that version is just barely in the works but wont take long, its easier than the road-race one.

wh1te370z · 08-03-2011, 07:45 PM

Was talking about fuel starvation to a guy at work. I just came from the glen and was getting fuel starvation after the 2nd lap w a full tank. The guy was saying it might be fuel boiling off in the fuel rails. So he suggested a cold box. Has anyone tried that? My fuel would cut out after taking a sweeping uphill turn into a straight away and would die out at about 6000-6500 rpm for about two seconds then kick back in.

travisjb · 08-03-2011, 07:55 PM

Quote:

Originally Posted by wh1te370z

Was talking about fuel starvation to a guy at work. I just came from the glen and was getting fuel starvation after the 2nd lap w a full tank. The guy was saying it might be fuel boiling off in the fuel rails. So he suggested a cold box. Has anyone tried that? My fuel would cut out after taking a sweeping uphill turn into a straight away and would die out at about 6000-6500 rpm for about two seconds then kick back in.

Interesting idea, but doubt it considering my problem is largely remedied by controlling the amount of fuel that gets picked up by the main pump

Stay the course

ChrisSlicks · 08-03-2011, 08:29 PM

Quote:

Originally Posted by wh1te370z

Was talking about fuel starvation to a guy at work. I just came from the glen and was getting fuel starvation after the 2nd lap w a full tank. The guy was saying it might be fuel boiling off in the fuel rails. So he suggested a cold box. Has anyone tried that? My fuel would cut out after taking a sweeping uphill turn into a straight away and would die out at about 6000-6500 rpm for about two seconds then kick back in.

Uphill right-handers are the worst possible scenario given the pickup location. Higher RPM's are sucking more fuel which is why it is more likely to happen, but even up shifting early it will still happen just a lap or 2 later. For the Glen all the esses are uphill and there are a couple of other slightly uphill right-handers.

wh1te370z · 08-04-2011, 08:03 AM

Quote:

Originally Posted by ChrisSlicks

Uphill right-handers are the worst possible scenario given the pickup location. Higher RPM's are sucking more fuel which is why it is more likely to happen, but even up shifting early it will still happen just a lap or 2 later. For the Glen all the esses are uphill and there are a couple of other slightly uphill right-handers.

I didnt have any problems with the esses. Turn 1-4 were basically my favorite turns there. The only problem was the Toe of the boot (Turn 8) turn 9 into 10 was a slight up hill but not as bad as 8.

wickedness · 08-04-2011, 10:24 PM

Man! I have tracked my car for two summers now and havent experinced this issue yet. Went crazy hard at the track 2 weeks ago all the way down to 1 dot of fuel! Today at 1/4 tank, took a sharp right hander on to an off ramp going uphill at full throttle , nothin! Sputtered , ran a bit, finally died. Of course parked on a uphill wont start at all. Just sputtered . Towed it to the dealer and it ran fine! Drove it home ran fine. I was still at 1/4 tank 20 min to gas station. Put $20 bucks of gas and it only went up 2 dots! Wtf? Any of you experienced pros of fuel starvation want to tell me what to change?

08-02-2011, 03:28 PM	#1 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,669 Drives: 370 Rep Power: 974725	OH so close here. Our full road-race solution is completely built and ready for testing. we also have a significantly less expensive street solution that should greatly reduce the problem for street drivers that like to take those ramps at 1+ g's... that version is just barely in the works but wont take long, its easier than the road-race one. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

08-03-2011, 07:45 PM	#2 (permalink)
wh1te370z Track Member Join Date: Jul 2010 Location: New York, Long Island Posts: 559 Drives: PW Base Sport 6 Spd Rep Power: 18	Was talking about fuel starvation to a guy at work. I just came from the glen and was getting fuel starvation after the 2nd lap w a full tank. The guy was saying it might be fuel boiling off in the fuel rails. So he suggested a cold box. Has anyone tried that? My fuel would cut out after taking a sweeping uphill turn into a straight away and would die out at about 6000-6500 rpm for about two seconds then kick back in. __________________ 1998 BMW 328is... Track Build 2010 White 370z.... sold

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08-04-2011, 10:24 PM	#6 (permalink)
wickedness Base Member Join Date: Mar 2011 Location: Calgary Alberta Posts: 11 Drives: 2010 370z sport Rep Power: 16	Man! I have tracked my car for two summers now and havent experinced this issue yet. Went crazy hard at the track 2 weeks ago all the way down to 1 dot of fuel! Today at 1/4 tank, took a sharp right hander on to an off ramp going uphill at full throttle , nothin! Sputtered , ran a bit, finally died. Of course parked on a uphill wont start at all. Just sputtered . Towed it to the dealer and it ran fine! Drove it home ran fine. I was still at 1/4 tank 20 min to gas station. Put $20 bucks of gas and it only went up 2 dots! Wtf? Any of you experienced pros of fuel starvation want to tell me what to change?