At what power does fuel starvation start?

[Oxxmox]

I'm having the common fuel starvation issues in right turns on track alot of others already experienced.
From what I've read so far, this is mostly happening with highly increased power (like 600+ hp maybe even with PI + upgrade turbos...).

I'm currently driving with 450 hp, some aero upgrades and CRS semi slicks and this is still happening in double or long right turns when accelerating out of the apex.
Sometimes event with 3/4 tank when it's an uphill right turn.
Took out my LPFP and checked the venturi jet valve. Everything seems fine.

Anyone else having the fuel starvation issue with little power increase or maybe even with OEM power?

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[DC5UPRA]

It's not power, it's higher Gs, particularly lateral. So going to grippier tires is generally the issue. I had the issue as soon as I went 200tw at stock power, no aero in long right hand sweepers. Had it happen with 2/3 tank so just top off every session.

 

[razorlab]

Yea power has a part (because of fuel demands) but it can happen at stock power.

Running Ethanol mixes compounds the problem as the fuel system already has higher demand.

 

[rwense]

Like the others have said, I have fuel starve issues at half a tank with stock power, 200tw, and aero. Sometimes a bar above half

 

[Oxxmox]

Thank you all for the feedback. Really appreciated!

That meansI'll have to look for a surge tank solution or somehow increase the capacity of the OEM LPFP bucket so it doesn't run out of fuel so fast.

Has someone ever considered just upgrading the Venturi Jet Valve instead of a more complicated solution?

 

[itzTang]

Thank you all for the feedback. Really appreciated!

That meansI'll have to look for a surge tank solution or somehow increase the capacity of the OEM LPFP bucket so it doesn't run out of fuel so fast.

Has someone ever considered just upgrading the Venturi Jet Valve instead of a more complicated solution?

or keep fuel level above half way?

 

[Oxxmox]

or keep fuel level above half way?

I'm mostly driving on the Nordschleife where the issue already occurs on the 2nd lap on an uphill right turn.
I want to drive 4-5 laps per session so fueling up after every lap would be annoying.

 

[razorlab]

I'm mostly driving on the Nordschleife where the issue already occurs on the 2nd lap on an uphill right turn.
I want to drive 4-5 laps per session so fueling up after every lap would be annoying.

It sounds like TBR has created a fuel starvation fix that doesn't have the crazy complexity and (maybe) cost of the external surge tank solutions currently on the market. I would contact them.

 

[cut 'n' shut]

Just got back from 2 days at VIR Full Course. Car has heavy aero, but the engine is completely stock, 93 pump gas, no tune.

I’m getting fuel starvation/cut after about 7 laps, right around half tank (even when starting sessions with a full tank). It happens right after the start/finish right kink. The car suddenly cuts power at 130 mph, sucks air, goes into limp mode, and keeps cutting even when I try to get back on throttle.

Pretty terrifying when it cuts at 130+mph though, It feels violent. I need a longer term solution.

 

[rwense]

Just got back from 2 days at VIR Full Course. Car has heavy aero, but the engine is completely stock, 93 pump gas, no tune.

I’m getting fuel starvation/cut after about 7 laps, right around half tank (even when starting sessions with a full tank). It happens right after the start/finish kink. The car suddenly cuts power at 130 mph, sucks air, goes into limp mode, and keeps cutting even when I try to get back on throttle.

Pretty terrifying when it cuts at 130+mph though, It feels violent. I need a longer term solution.

Unfortunately, sounds about right 🫤

Thunderbunny apparently has some sort of solution in testing but I havent heard a ton about it lately.

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