Fuel starvation, who else?

SPOHN · 11-27-2011, 05:22 AM

Yep I had this yesterday. My car was three dots past a 1/4 of a tank. I was going down hill a long right hander and had no throttle for about five seconds. Went around the next and the car shut off for about five mins before I could get it restarted. I just then limped it back. So sad.

I will buy this.

Shamu · 11-27-2011, 01:49 PM

I had my first experience with fuel starve issues at lacuna Seca. Turn 4 and turn 10 caused the issue. I was about 6 gallons down from full tank.

I noticed www intengineering com has a universal surge tank pump. Anyone using that one?

Mike · 11-27-2011, 06:56 PM

Quote:

Originally Posted by Shamu

I had my first experience with fuel starve issues at lacuna Seca. Turn 4 and turn 10 caused the issue. I was about 6 gallons down from full tank.

I noticed www intengineering com has a universal surge tank pump. Anyone using that one?

some of the guys talked to the Nissan pro driver at Petit Lemans, and they are running a second fuel pump in the other side, I believe. I got there a little late for the details, but I do recall hearing it was a volvo pump or something.

Right now, since after today I am done until spring, I'm waiting to see CJs solution.

travisjb · 11-27-2011, 08:23 PM

that's the setup i'm using... plus a 3rd fuel pump at rear of tank... plus baffling... like i've said before, it is good for getting down to ~6 gal

Quote:

Originally Posted by Mike

some of the guys talked to the Nissan pro driver at Petit Lemans, and they are running a second fuel pump in the other side, I believe. I got there a little late for the details, but I do recall hearing it was a volvo pump or something.

Right now, since after today I am done until spring, I'm waiting to see CJs solution.

Mike · 11-27-2011, 09:00 PM

Quote:

Originally Posted by travisjb

that's the setup i'm using... plus a 3rd fuel pump at rear of tank... plus baffling... like i've said before, it is good for getting down to ~6 gal

speaking of which, I got these tires back in September, and they don't clear my control arms without spacers. I've been wondering for 2 months how they fit on your car and not mine, and I got your specs on my forgestars, then just yesterday I realized they aren't on my forgestars, just my 350z wheels! doh!

Mike · 11-27-2011, 06:54 PM

Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend.

Whats up with that? I'm not driving any slower.

travisjb · 11-27-2011, 08:24 PM

(lack of) accuracy of the fuel gauge would explain it

Quote:

Originally Posted by Mike

Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend.

Whats up with that? I'm not driving any slower.

phunk · 11-28-2011, 12:39 PM

Quote:

Originally Posted by Mike

Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend.

Whats up with that? I'm not driving any slower.

If anything, I would say that may be a sign you are going faster. To "achieve" the problem at a higher tank level could be a sign that you are losing fuel to the drivers side of the tank worse due to a harder right turn, and the fuel system isnt recovering as quickly.

our solution not only uses the rather decent fuel surge can to prevent the engines fuel pump from momentarily starving, but it also adds another siphon to transfer fuel back to the pump side of the tank... and its quite a bit more powerful than the stock siphon... so with them both working together the recovery of the fuel to the pump side of the tank will be more than twice as quick.

the new design is like 95% done from last week. I just have to sort out this one bracket setup for installation and we are ready to build a test unit or two.

who is going to be racing continually that we can work out a testing deal with now since winter has shut down many of you guys until spring?

FL 4Motion · 11-28-2011, 08:11 PM

Quote:

Originally Posted by phunk

If anything, I would say that may be a sign you are going faster. To "achieve" the problem at a higher tank level could be a sign that you are losing fuel to the drivers side of the tank worse due to a harder right turn, and the fuel system isnt recovering as quickly.

our solution not only uses the rather decent fuel surge can to prevent the engines fuel pump from momentarily starving, but it also adds another siphon to transfer fuel back to the pump side of the tank... and its quite a bit more powerful than the stock siphon... so with them both working together the recovery of the fuel to the pump side of the tank will be more than twice as quick.

the new design is like 95% done from last week. I just have to sort out this one bracket setup for installation and we are ready to build a test unit or two.

who is going to be racing continually that we can work out a testing deal with now since winter has shut down many of you guys until spring?

well crap, our car will be running at daytona this Fri and Sat, not enough heads up...

nismo09 · 12-02-2011, 09:05 AM

Quote:

Originally Posted by Mike

Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend.

Whats up with that? I'm not driving any slower.

Mike, you are just getting smoother on you inputs. Seat time is a beautiful thing.

FL 4Motion · 12-02-2011, 09:42 PM

FYI, wifey finished day 1 of a two day track event at Daytona today. She got fuel starve at 6 dots down from full in the last right hander coming out of the infield.

Edit: still on stock nismo suspension running PS2 tires.

takjak2 · 11-28-2011, 11:11 AM

This is killing me at VIR

SPOHN · 11-28-2011, 12:49 PM

Need some guys from FL (Travis). lol. I believe they still have track days year around down there.

travisjb · 11-28-2011, 03:29 PM

Quote:

Originally Posted by SPOHN

Need some guys from FL (Travis). lol. I believe they still have track days year around down there.

I would offer up my car but it already has another system installed... and it'd be a good amount of work to pull the old system and test this one... e.g., my fuel tank has 'baffling' inside it now to control fluid movement, so any testing we do would not be 100% applicable to other cars

Also, when it emerges from jnaut's shop end of next week, we are already going to have a lot of changes (GTM St 2 SC) - so might be better to use a vehicle that is a bit more stock... e.g., SC changes the voltages to the fuel pump etc

If none of those are a concern and you want to work something out, I'm happy to talk. Should have 2-3 track events between now and end of Jan

jr1 · 11-28-2011, 04:33 PM

I'll be running pretty consistently in the upcoming months. Located in Norcal. Possibly running buttonwillow 12/11-12, will be driving T-hill early January. T-hill is definitely not the ideal track for testing this as there is only one turn where I consistently have starvation issues but Buttonwillow and the others around here should be good.

11-27-2011, 05:22 AM	#1 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	Yep I had this yesterday. My car was three dots past a 1/4 of a tank. I was going down hill a long right hander and had no throttle for about five seconds. Went around the next and the car shut off for about five mins before I could get it restarted. I just then limped it back. So sad. I will buy this. __________________

11-27-2011, 06:54 PM	#6 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2187	Interesting enough for me, the only changes I have made are going from 275/35-18 Hankook R compounds to Hoosier 295/40-18s and raising the car 1/4", and at Road Atlanta, I went from getting it at 3 dots from full to 6 this weekend. Whats up with that? I'm not driving any slower. __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

11-28-2011, 11:11 AM	#12 (permalink)
takjak2 A True Z Fanatic Join Date: Feb 2011 Location: Sterling, VA Posts: 1,922 Drives: Legit Racecar 370Z Rep Power: 143	This is killing me at VIR __________________ Mods \| Stuff \| Things \| Seat Time \| Nismo facebook.com/TeamSparrowSpeed

11-28-2011, 12:49 PM	#13 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	Need some guys from FL (Travis). lol. I believe they still have track days year around down there. __________________

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11-27-2011, 01:49 PM	#2 (permalink)
Shamu A True Z Fanatic Join Date: Jan 2011 Location: Nor Cal Posts: 1,059 Drives: 370Z Racecar Rep Power: 20	I had my first experience with fuel starve issues at lacuna Seca. Turn 4 and turn 10 caused the issue. I was about 6 gallons down from full tank. I noticed www intengineering com has a universal surge tank pump. Anyone using that one?

12-02-2011, 09:42 PM	#11 (permalink)
FL 4Motion A True Z Fanatic Join Date: Feb 2009 Location: FL Posts: 4,776 Drives: Baby Shark Rep Power: 701616	FYI, wifey finished day 1 of a two day track event at Daytona today. She got fuel starve at 6 dots down from full in the last right hander coming out of the infield. Edit: still on stock nismo suspension running PS2 tires.

11-28-2011, 04:33 PM	#15 (permalink)
jr1 Base Member Join Date: Aug 2010 Location: East Bay Posts: 123 Drives: 09 370z BS 6s Rep Power: 16	I'll be running pretty consistently in the upcoming months. Located in Norcal. Possibly running buttonwillow 12/11-12, will be driving T-hill early January. T-hill is definitely not the ideal track for testing this as there is only one turn where I consistently have starvation issues but Buttonwillow and the others around here should be good.