Fuel starvation, verus flap? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ZDan · 05-18-2021, 10:20 AM

I got fuel starvation at 7/8 tank at New Hampshire Motor Speedway (chicane/chicane) couple of weekends ago, coming out of T6/T7 (6 is a heavily banked 180 degree left-hander that blends into 7, also left). Is the Verus flappy door the preferred cheap-and-easy fix? Palmer coming up June 19/20, it's the only place I've had fuel starvation before, and that was at just under 1/2-tank. With apparently grippier tires this year (Nankang CR-1) I'd like to be able to run at 1/2-tank, or at least 3/4 without running into this issue after extended turn 1-2 left-hander...

NoHaveMSG · 05-18-2021, 10:37 AM

It helps a lot, especially on an NA car. I used to get fuel starve on this long decreasing radius left, now I don't at even low fuel levels.

fminicooper · 05-18-2021, 11:01 AM

worked for me like a charm. NA engine, starving on long left quick turn @msRH.

check filling full full the tank if you properly reseal the tank.

Goingnowherefast · 05-18-2021, 11:40 AM

As another data point, I just received my Verus Fuel Door. I too had fuel starvation issues while less than 3/4 tank on 245/40/17 A052's. I'm honestly surprised more people don't have issues, but I guess it's a function of G-force which may only be achievable on certain tracks/setups. Will update here with my results.

14stu · 05-18-2021, 03:30 PM

It helps but won't fix your issues. At one of my local tracks without the flap I'd get fuel cut at 1/2 a tank or less on 200tw tires, with the flap I can go down to about 1/3rd of a tank before fuel starve. For me, that's worth it since it means I can do 2x20min sessions before refueling instead of needing to top off after every session.

ZDan · 05-18-2021, 04:50 PM

Quote:

Originally Posted by 14stu

It helps but won't fix your issues. At one of my local tracks without the flap I'd get fuel cut at 1/2 a tank or less on 200tw tires, with the flap I can go down to about 1/3rd of a tank before fuel starve. For me, that's worth it since it means I can do 2x20min sessions before refueling instead of needing to top off after every session.

If it allows me to keep on trucking to 1/2, 5/8, or even 3/4 of a tank, it'll be worth it vs. starvation at 7/8...

ZDan · 05-18-2021, 06:29 PM

Flap ordered, thanks fellas!

jflogerzi · 05-18-2021, 11:19 PM

Maybe replace oem pump with a stronger aftermarket pump. How old is the oem pump. Your in there might as well just in case you decided to goto more power or boost

Sent from my GM1915 using Tapatalk

ZDan · 05-19-2021, 07:22 AM

Quote:

Originally Posted by jflogerzi

Maybe replace oem pump with a stronger aftermarket pump. How old is the oem pump. Your in there might as well just in case you decided to goto more power or boost

it's a 2017, not too worried about the fuel pump. I'd be more likely to get a new 2.4 and go from there rather than boost the 2.0, I think... Any case I'll put other possible upgrades until I needs em.

NoHaveMSG · 05-19-2021, 12:47 PM

Quote:

Originally Posted by jflogerzi

Maybe replace oem pump with a stronger aftermarket pump. How old is the oem pump. Your in there might as well just in case you decided to goto more power or boost

Sent from my GM1915 using Tapatalk

The issue is the fuel runs out of the fuel basket on left turns where the fuel pump is housed. The only real 100% fix is to go to a swirl pot.

05-18-2021, 10:20 AM	#1
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,595 Thanks: 1,381 Thanked 3,908 Times in 2,039 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	Fuel starvation, verus flap? I got fuel starvation at 7/8 tank at New Hampshire Motor Speedway (chicane/chicane) couple of weekends ago, coming out of T6/T7 (6 is a heavily banked 180 degree left-hander that blends into 7, also left). Is the Verus flappy door the preferred cheap-and-easy fix? Palmer coming up June 19/20, it's the only place I've had fuel starvation before, and that was at just under 1/2-tank. With apparently grippier tires this year (Nankang CR-1) I'd like to be able to run at 1/2-tank, or at least 3/4 without running into this issue after extended turn 1-2 left-hander...

05-18-2021, 11:40 AM	#4
Goingnowherefast Senior Member Join Date: May 2019 Drives: AP2 S2000, 91 Miata 1.8L Rotrex 5MT Location: Detroit, MI Posts: 465 Thanks: 275 Thanked 299 Times in 187 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	As another data point, I just received my Verus Fuel Door. I too had fuel starvation issues while less than 3/4 tank on 245/40/17 A052's. I'm honestly surprised more people don't have issues, but I guess it's a function of G-force which may only be achievable on certain tracks/setups. Will update here with my results. __________________ 2022 Hyundai Elantra N 6MT SCCA TT S3//Will be back in an 86 eventually

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
SAVAGE! Autoworks fuel starvation flap $55	Ashikabi	Engine, Exhaust, Bolt-Ons	0	10-24-2020 09:10 AM
Fuel Starvation?	Lunatic	Tracking / Autocross / HPDE / Drifting	37	03-28-2018 11:47 PM
How to fix fuel starvation on left hand turns - Verus Fuel Door	FT-86 SpeedFactory	Engine, Exhaust, Transmission	3	08-21-2017 03:22 PM
Fuel Starvation issues? YAY OR NAY?	track_warrior	Tracking / Autocross / HPDE / Drifting	23	10-22-2013 11:19 AM
Fuel Starvation	feldy	Tracking / Autocross / HPDE / Drifting	1	06-09-2012 10:14 AM

05-18-2021, 11:01 AM	#3
fminicooper Senior Member Join Date: Dec 2017 Drives: FRS Hot Lava Location: Houston Posts: 116 Thanks: 83 Thanked 54 Times in 35 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	worked for me like a charm. NA engine, starving on long left quick turn @msRH. check filling full full the tank if you properly reseal the tank.

05-18-2021, 06:29 PM	#7
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,595 Thanks: 1,381 Thanked 3,908 Times in 2,039 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	Flap ordered, thanks fellas!

User Name		Remember Me?
Password