Fuel Pump Solution - All Failure Modes
#376
Registered
iTrader: (4)
I continue to suffer from fuel starvation even after imstalling the Walbro fix so I am planning to add a 2nd fuel canister/pump assembly into the passenger side of the stock tank. The cross tank line would be disabled and the outflow lines would be 'Y'd to a single line to the fuel rail.
Has anyone tried this or have comments?
Thanks.
Has anyone tried this or have comments?
Thanks.
#379
I met with a principal technical rep from Walbro at SEMA last year. He claimed that he had not ever seen one of their pumps fail, other than when contaminated. I pointed out that I had, in fact seen several fail that were most definitely not contaminated.
He said I should send a few samples of this failure to him. I sent him a rather large bag full of failed Walbros.
He suddenly became completely unavailable and unresponsive to further queries.
He said I should send a few samples of this failure to him. I sent him a rather large bag full of failed Walbros.
He suddenly became completely unavailable and unresponsive to further queries.
#382
Registered
#386
Walbro was for a long time the go-to choice for in-tank pumps (if you didn't want a big dinosaur like the Bosch).
These days, all I hear from guys I track with are stories of fried Walbros. This is all very recent, so I can't help but think that Walbro took a "if you can't beat 'em, join 'em" attitude with regards to the sudden influx of Chinese knock-offs.
98% of the time, a cheap pump will be just fine. But, in the case of an FI Renesis, that 2% is a big problem.
#392
Registered
iTrader: (3)
it has been doing ok for me for over a year now. No starvation issues at all and supplies enough fuel to run mine at unscaled maf reading of 365 grams second and a/f's in high 10's? Thats good enough for me?
You are right it is not a plug and play. you have to change one connector and you have to fab up a siphon tube hook up ( 2 worms clamps and a fuel resistant piece of hose).
It is not as powerful as the aftermarket set up, but until the aftermarket pump is finalized its better than the S1 model. So if anyone is caught in be tween a rock and a hard place --it is an option.
OD
You are right it is not a plug and play. you have to change one connector and you have to fab up a siphon tube hook up ( 2 worms clamps and a fuel resistant piece of hose).
It is not as powerful as the aftermarket set up, but until the aftermarket pump is finalized its better than the S1 model. So if anyone is caught in be tween a rock and a hard place --it is an option.
OD
#394
Registered
iTrader: (3)
for now I am. I discovered my timing is higher than I thought in 3-4 gear and before my new engine install i had added bigger p2 injectors (blues)to increase my fuel. Not the best way of handling things but better than nothing. My a/f's changed from around 11:1 to 10:5 or so when the P2's came on board.
I did that only for a track event and was running really strong until my ssv vacuum line popped off and it closed. Thats not a good thing.
As soon as I can get on the dyno with this new engine a new tune will be done. Gas is not as good as it used to be just 3 years ago.
S2 model pump is a better pump--this one is made by denso. IMHO its a better cup/filter/siphon set up also.
If an aftermarket pump could be done to the S2 assembly that would be the best?
OD
I did that only for a track event and was running really strong until my ssv vacuum line popped off and it closed. Thats not a good thing.
As soon as I can get on the dyno with this new engine a new tune will be done. Gas is not as good as it used to be just 3 years ago.
S2 model pump is a better pump--this one is made by denso. IMHO its a better cup/filter/siphon set up also.
If an aftermarket pump could be done to the S2 assembly that would be the best?
OD
#396
It is made by Denso, but it is actually no better with regards to total flow at nominal pressure.
True.
Were I to go beyond the S1 assembly, I would build an entirely different setup with an active pickup and a return regulation system.
Last edited by MazdaManiac; 05-16-2011 at 01:23 AM.
#397
Rotorhead
![EU](https://www.rx8club.com/images/icons/eu.jpg)
I've just discovered that the BHR store offers the upgraded pumps again -- so has the (suspected) issue with Walbro pump quality been resolved? Or has it never been an issue? I do recall that for a time the upgraded pump was not listed/available at the BHR store, but that could have been just a web content problem...