Brettspeed Fuel Pump Solution - FI on high speed corners
01-30-2015, 07:35 AM
#127
SPOOLN8
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Team, when you premix your premix how much fuel are you using? Small amount to get it started or are you filling like a whole gerry can?
I like to stop halfway while filling and dump my premix into the tank then continue filling
I like to stop halfway while filling and dump my premix into the tank then continue filling
01-30-2015, 11:57 AM
#128
Note : the issue didn't start at all till after about 3/4 hr of normal driving followed by 30mins of track speed driving . And then got steadily worse as I used up the entire tank of gas .
Last edited by Brettus; 01-30-2015 at 12:11 PM.
01-30-2015, 12:22 PM
#129
seeing as you are convinced that caused the issue .... how about trying to explain why ..............
Note : the issue didn't start at all till after about 3/4 hr of normal driving followed by 30mins of track speed driving . And then got steadily worse as I used up the entire tank of gas .
Note : the issue didn't start at all till after about 3/4 hr of normal driving followed by 30mins of track speed driving . And then got steadily worse as I used up the entire tank of gas .
I don't know...I have never had that issue either..I usually put in 20L or so...add the premix and then fill it up.
When I add gas at the track it is usually pre-mixed in gascans that I make sure are mixed up...
Are you sure that the filter wasn't just plugged up before and you never noticed it?
01-30-2015, 12:52 PM
#130
I don't know...I have never had that issue either..I usually put in 20L or so...add the premix and then fill it up.
When I add gas at the track it is usually pre-mixed in gascans that I make sure are mixed up...
Are you sure that the filter wasn't just plugged up before and you never noticed it?
When I add gas at the track it is usually pre-mixed in gascans that I make sure are mixed up...
Are you sure that the filter wasn't just plugged up before and you never noticed it?
The filter was one that came out of a second hand pump that did have about 60000 kms on it . It "looked" clean when I put it in .
I had already done a track day and quite a few thousand kms with that filter and it was fine.
When I pulled it out it after this issue it actually looked fine .... it wasn't till i blew through it that i realised it was restricting flow when compared to another clean filter i had .
I'm convinced it was due to the age of the (1/2 used) bottle of premix.... unless Team can give me reason to think otherwise.
Last edited by Brettus; 01-30-2015 at 12:55 PM.
01-30-2015, 01:32 PM
#131
SARX Legend
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I don't see how adding it and then filling up would not mix it up. And I don't see how it sitting would cause it to go bad after 2 years. I have had Idemitsu that has sat that long and it looks just fine, it has not separated or anything. Unless it is open or contaminated or something i just don't see it going bad. The shelf life should be similar to engine oil which is like 5 years.
01-30-2015, 01:40 PM
#132
I don't see how adding it and then filling up would not mix it up. And I don't see how it sitting would cause it to go bad after 2 years. I have had Idemitsu that has sat that long and it looks just fine, it has not separated or anything. Unless it is open or contaminated or something i just don't see it going bad. The shelf life should be similar to engine oil which is like 5 years.
IDK ... it's the most plausible explanation that I can think of ...............
01-31-2015, 02:49 PM
#134
Sitting at a computer half-way across the planet means that there's no way possible for me to know what the cause is. Further, I never said it was the cause. In general it's not considered good practice to pour the oil in and then fill it up. The philosophy goes back decades ago with outboard boat engines etc.
There are a lot of factors involved; tank configuration, starting fuel level, etc. for starters, with a dual saddlebag tank there's no way you have equal oil percentage distribution on each side after fillup. If the tank is low/near empty where does the oil go when you first pour it in? Probably straight down to where the fuel pump is.
Is bad premix oil a possibility? Sure, I don't dispute that at all, but it doesn't change my opionion about pouring oil directly into the tank rather than in whole or at least partially using a separate 5 gallon container to actually pre-mix it prior to going in the fuel tank.
There are a lot of factors involved; tank configuration, starting fuel level, etc. for starters, with a dual saddlebag tank there's no way you have equal oil percentage distribution on each side after fillup. If the tank is low/near empty where does the oil go when you first pour it in? Probably straight down to where the fuel pump is.
Is bad premix oil a possibility? Sure, I don't dispute that at all, but it doesn't change my opionion about pouring oil directly into the tank rather than in whole or at least partially using a separate 5 gallon container to actually pre-mix it prior to going in the fuel tank.
02-01-2015, 12:49 AM
#135
Sitting at a computer half-way across the planet means that there's no way possible for me to know what the cause is. Further, I never said it was the cause. In general it's not considered good practice to pour the oil in and then fill it up. The philosophy goes back decades ago with outboard boat engines etc.
There are a lot of factors involved; tank configuration, starting fuel level, etc. for starters, with a dual saddlebag tank there's no way you have equal oil percentage distribution on each side after fillup. If the tank is low/near empty where does the oil go when you first pour it in? Probably straight down to where the fuel pump is.
Is bad premix oil a possibility? Sure, I don't dispute that at all, but it doesn't change my opionion about pouring oil directly into the tank rather than in whole or at least partially using a separate 5 gallon container to actually pre-mix it prior to going in the fuel tank.
There are a lot of factors involved; tank configuration, starting fuel level, etc. for starters, with a dual saddlebag tank there's no way you have equal oil percentage distribution on each side after fillup. If the tank is low/near empty where does the oil go when you first pour it in? Probably straight down to where the fuel pump is.
Is bad premix oil a possibility? Sure, I don't dispute that at all, but it doesn't change my opionion about pouring oil directly into the tank rather than in whole or at least partially using a separate 5 gallon container to actually pre-mix it prior to going in the fuel tank.
02-01-2015, 01:45 AM
#136
What's obvious is you making assumptions, no different than assuming pouring the oil in first and then pumping gas results in a homogenous mixture.
The truth is you have no firm proof of what actually happened. In that situation the smart course of action is to implement whatever good common sense practices and strategies are possible.
If you had a clear 5 gallon race jug you might have noticed something wasn't right if indeed it was bad oil, but now you can only guess. Making a concentrated premix blend and shaking it up good makes more sense than just dumping oil in the tank. I realize premixing to spec in 5 gallon jugs, 55 gallon drums, etc. isn't convenient for the street, but for racing I wouldn't do it any other way.
.
The truth is you have no firm proof of what actually happened. In that situation the smart course of action is to implement whatever good common sense practices and strategies are possible.
If you had a clear 5 gallon race jug you might have noticed something wasn't right if indeed it was bad oil, but now you can only guess. Making a concentrated premix blend and shaking it up good makes more sense than just dumping oil in the tank. I realize premixing to spec in 5 gallon jugs, 55 gallon drums, etc. isn't convenient for the street, but for racing I wouldn't do it any other way.
.
02-01-2015, 01:07 PM
#137
I must remember to make an extra effort to try understand you better next time.
I still doubt it makes any difference but ..............I do take your point.
no different than assuming pouring the oil in first and then pumping gas results in a homogenous mixture.
The truth is you have no firm proof of what actually happened. In that situation the smart course of action is to implement whatever good common sense practices and strategies are possible.
If you had a clear 5 gallon race jug you might have noticed something wasn't right if indeed it was bad oil, but now you can only guess. Making a concentrated premix blend and shaking it up good makes more sense than just dumping oil in the tank. I realize premixing to spec in 5 gallon jugs, 55 gallon drums, etc. isn't convenient for the street, but for racing I wouldn't do it any other way.
.
The truth is you have no firm proof of what actually happened. In that situation the smart course of action is to implement whatever good common sense practices and strategies are possible.
If you had a clear 5 gallon race jug you might have noticed something wasn't right if indeed it was bad oil, but now you can only guess. Making a concentrated premix blend and shaking it up good makes more sense than just dumping oil in the tank. I realize premixing to spec in 5 gallon jugs, 55 gallon drums, etc. isn't convenient for the street, but for racing I wouldn't do it any other way.
.
02-04-2015, 08:07 AM
#138
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Premix clogged filter?
this had me wondering... does premix clogs up the fuel pump filter?
I only premix when tracking and I noticed that my fuel pressure would be lower after that track session. only after I cleaned the filter then the pressure goes back to what it was before the track session.
I only premix when tracking and I noticed that my fuel pressure would be lower after that track session. only after I cleaned the filter then the pressure goes back to what it was before the track session.
02-04-2015, 10:05 AM
#139
SARX Legend
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This was mine (120,000+ miles on it in almost ten years) after years of premixing. It looks clogged right? Well it functioned perfectly. It only got pulled and replaced because I put a new pump assembly with the Walbro in as a preventive measure before going turbo.
Last edited by 9krpmrx8; 02-04-2015 at 12:00 PM.
02-04-2015, 11:58 AM
#140
Mine after 1.5 yrs premixing 1/2 oz per gallon. Cleans as a whistle! What's your ratio and how many years specifically?
FWIW good or bad I do the dump and pump method.
FWIW good or bad I do the dump and pump method.
Last edited by slash128; 02-04-2015 at 12:29 PM.
02-04-2015, 01:22 PM
#141
I think the problem I had was made much worse by the 320lph pump i have installed . I have a feeling the filter is too small for the flow it needs to handle now and the slightest restriction causes the mesh to be sucked in on itself.
Last edited by Brettus; 02-04-2015 at 01:31 PM.
02-05-2015, 02:43 AM
#145
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9k, talking about walbro...in addition to the pressure difference:
my walbro would start the whine louder after my track session with premix. after i cleaned the filter, the whine becomes softer. coincidence?
my walbro would start the whine louder after my track session with premix. after i cleaned the filter, the whine becomes softer. coincidence?
02-06-2015, 07:16 AM
#148
.
Last edited by TeamRX8; 02-06-2015 at 07:21 AM.
02-06-2015, 11:43 AM
#150
Well it's a Denso with a higher flow rating than the S1 Aram pump.
Typically it will one of several standard configurations that most high flow pumps are offered in, but I suppose it could be unique in some way.
Like yourself I don't really know. I'll disassemble it, if not this evening then over the weekend, and document what I find.
Typically it will one of several standard configurations that most high flow pumps are offered in, but I suppose it could be unique in some way.
Like yourself I don't really know. I'll disassemble it, if not this evening then over the weekend, and document what I find.