[ antrx.com ]

U12 Bluebird, Pintara & Stanza => performance and handling => Topic started by: Yaaar on May 28, 2010, 10:55AM

Title: Walbro 255hp + stock reg?
Post by: Yaaar on May 28, 2010, 10:55AM


  Title says it. Are there any known issues using the stock fuel pressure regulator with the Walbro high pressure?
Title: Re: Walbro 255hp + stock reg?
Post by: pedro666 on May 28, 2010, 11:00AM
there's no problem doing the fuel pump swap. well i haven't had any yet.
Title: Re: Walbro 255hp + stock reg?
Post by: SSS on May 28, 2010, 07:30PM
I've had no issues....
Title: Re: Walbro 255hp + stock reg?
Post by: KA24ET on May 28, 2010, 11:36PM
all good here too
Title: Re: Walbro 255hp + stock reg?
Post by: Luke on May 29, 2010, 10:04AM
I concur
Title: Re: Walbro 255hp + stock reg?
Post by: lgee on May 30, 2010, 02:13PM
i have fuel surge since i put the walbro 255 in my car, where i didnt have it before, when i goto the track that is on the street it seems not bad, i have a surge tank / swirl pot now so all is good again.
Title: Re: Walbro 255hp + stock reg?
Post by: SSS on May 31, 2010, 09:17AM
Sounds strange mate...i'm going to use my walbro as a lift pump then a couple of big pumps for feeding the rail when it's running E85.
Title: Re: Walbro 255hp + stock reg?
Post by: lgee on May 31, 2010, 11:00AM
Sounds strange mate...i'm going to use my walbro as a lift pump then a couple of big pumps for feeding the rail when it's running E85.

were you going to use a couple of 909's ? cause 2x 044 is a lot of fuel its 2x300 lph, the 909 will give you 2x165 lph one is about 180 and the other is 270 seems like a lot of cost for what you needs 1 x 044 will feed a 600 hp V8
Title: Re: Walbro 255hp + stock reg?
Post by: SSS on May 31, 2010, 01:30PM
E85 needs to 30% more fuel volume mate, remeber when this is done the car will be running 4 x 1000cc/min injectors, potentially with two stage injection later on (350cc/min primaries and the 1000's as secondaries).
Return will go back to the surge tank and overflow from that back into the stock tank. The surge tank should never be empty! (I can work out the mass flow rates, but I CBF'd at the moment)
I will probably run 1 044 to start, but i'll be fabricating the surge tank, mounts and plumbing to run 2.
Title: Re: Walbro 255hp + stock reg?
Post by: chr1S on May 31, 2010, 03:31PM
E85 is actually closer  to 40% according to our dyno tests here at uni, so more flow the merrier Adam  ;D

FSAE rules dictate that E85 attracts a 40% offset due to the increased fuel use anyway!
Title: Re: Walbro 255hp + stock reg?
Post by: lgee on May 31, 2010, 05:08PM
yeah, i went for a 2 litre swirl pot just to make sure, its a big fkr.
Title: Re: Walbro 255hp + stock reg?
Post by: pedro666 on Jun 2, 2010, 10:53AM
so does that mean that 40% more fuel would be used with E85?
Title: Re: Walbro 255hp + stock reg?
Post by: SSS on Jun 2, 2010, 11:27AM
yes