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I need to switch from race gas to E-85 and was wandering what else needs to change besides the carbs? The motor is 525 inch chrysler with 13 -1/2 to 1 and a tunnel ram with two 750's. I know all the fuel consumption difference and the back and forth on corrosion etc. Im just looking at what other hard parts I need to change. Also it looks like about $600 difference between converting the existing carbs and buying to E-85 ready carbs but do the converters do anything that the carb manufacturers dont? I was thinking about keeping the current carbs in case the availability of E-85 changes or the price changes to not make it feasible to use. Thanks in advance.
 

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Were there things done to carbs to trick them out or were they modified just to get to what a holley or quickfuel would be? Did you need to change anything else to convert? I'm looking at E-85 at $3.29 AND 110 AT 7.89. if its little more than a carb change they should be paid for before summers done. What kind of time did they have your carbs for the conversion? Summit has them from quickfuel that I can have tomorrow and since boat weather in Pa. is not what it is out west I may be balancing my patience and my money. guess which way that scales will tip? I think I've seen you say on here you are happy with the change, does that still stand?
 

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If you talk to ANYONE that has actually made the change to e85, you will always hear how awesome the stuff is. The negativity come from the inexperienced and uniformed. As long as you have the fuel volume increase covered, you are good to go. What filters, pump and size lines are you currently running?


AP
 

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I ve been checking out all the posts on here about and it really seems that is the case, some just have to much RC factor (resistance to change). I'm redoing all the fuel system thats why I thought now is the time to change over. Had -6 to carbs and -10 to fuel block. filters were billet aluminum in line with paper elements pump was holley marine pump. I'm not where i can look at it now but dont think there are any fittings used to step up or down in size.
 

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Is the main body the same , the paasages flow enough for the increased fuel demand? Please keep the info coming, work calls.
 

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I don't know anything about whether Quickfuel has good e85 carbs or not, and really I don't care, but I definitely don't agree about the paper filters. There is absolutely nothing wrong with paper filters in e85 system. Seen quite a few that don't believe they are, but have never seen a problem with them.


AP
 

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I don't know anything about whether Quickfuel has good e85 carbs or not, and really I don't care, but I definitely don't agree about the paper filters. There is absolutely nothing wrong with paper filters in e85 system. Seen quite a few that don't believe they are, but have never seen a problem with them.


AP
The problem with paper filters is that they absorb water. And we all know alcohol is hydroscopic and absorbs water from the air. Too much water and the filter will become a major restriction because it has been absorbed by the paper filter. I burned up a perfectly good Weldon electric fuel pump before I realized what was going on. The pump was working over time to overcome the restriction in the filter before it gave up.
 

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The problem with paper filters is that they absorb water. And we all know alcohol is hydroscopic and absorbs water from the air. Too much water and the filter will become a major restriction because it has been absorbed by the paper filter. I burned up a perfectly good Weldon electric fuel pump before I realized what was going on. The pump was working over time to overcome the restriction in the filter before it gave up.

I'm curious how long you had the filter in use? I tell my customers that the life of the fuel filter with E85 is NOT the same as a gas engine. If for no other reason, this is true because of how much more fuel it will have flow through it in the same amount of time. The fact that E85 will absorb some water is another factor. Another aspect I was reading in some SAE tech articles is that ethanol disperses dust to a greater degree which inevitably also causes reduced filter life. All of this has to do with the LIFE of the filter, not that you cannot run one because it will destroy the filter.

I would still rather have a 6 month service interval for a 10 micron paper fuel filter, than to run a SS 40-60 micron post pump filter. Replacement paper filters are cheap. I'd take improved filtering over less maintenance ANY day.

Also, correct information about why there may be added maintenance when running a paper filter with E85 is much better than "E85 will destroy your fuel system!"





Andrew
 

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Andrew, I have not experienced the paper filter issue myself, but a number of people on the raceone85.com board have had problems with the glue in the filter coming apart. The paper was not a problem, but just the glue. When it did the paper would separate from the ends and the glue (now in a gel form) would migrate to the needle and seats and gum up the carb. That was over an extended period of time, but it still happened to a number of people. Like I said, not personal experience. Other than that, fill R' up.

Also, if the price of new carbs in not a major issue for you and you want to be able to go back if necessary, I would do new. When done right, the builder will usually put in new boosters also for the added fuel requirements and that might mess up your gas tune if you try to go back. Then again, if funds are tight converting them is a great way if done by a reputable shop.

Paul
 

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I have read about a couple cases of that, however they were all filters that had over 2 yrs of service. This is much longer than I would ever leave a 10 micron paper filter in a high HP E85 engine. do you happen to know the time frame that caused the glue to break down? Also is there a specific manufacture that was a common glue failure? I know that the OEM's do not have this issue, or at least have not seen any that have.

I would also say that if building a fuel system for carbs, I would run the SS 25-40 micron post filter since having filtration down to 10 micron is far less critical than on EFI.


Andrew
 

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when someone invents a paper filter that will pull the water out of alcohol, the distillers will beat a path to their door. Why distill water out of alcohol when you can just filter it out? :)sphss

Just a teeny tiny difference between seperating water from gasoline and oil and seperating it from alcohol. The paper filter rumor is bullshit. It MAY be something to the glue failure, but not because the filter was made of paper.
BUT!!!!, there is a possibilty that what is being discribed as a "paper" filter is in reality a cellulose filter, like most oil filters, and those cellulose fibers are held together with a "glue" But 99% of the oil filters out there won't failure if your ran methanol thru them. Fram with their glued on cardboard end caps might fail, but only brain damaged people are still running those now that EVERYBODY ELSE knows better. If the paper/cellulose filter failed, it was a POS before it was but into service. There is no end what people will buy to save a buck. ProComp's very existence is proof of that.



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Is the main body the same , the paasages flow enough for the increased fuel demand? Please keep the info coming, work calls.
I am currently switching my 19' Schiada Race Arrow E-85 setup to EFI. I have 2 950 Quickfuel carbs modified by Mark Sullens with Holley metering blocks for sale @ 1300.00 OBO. They support a 496 BBC @ 17# boost. I would send them to Mark for a recalibrabration for your setup per engine build specs for a modest fee. Bolt on, set idle and GO!
 

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I would consider running E-85 in my boat, but isn't it tough to find? There's only one station I know of around here that carries it.
 

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Andrew and Bob, yes the filters had been in for a long time (around two plus years in the three instances I know of). These were in basic bracket motors that were not your "max effort" race engines as some see it. Hence the reason for a filter to be in for a longer period of time. If it ain't broke don't fix it. My point for even bringing it up is I know some here do not have a specific service schedule like some do and so I wanted to bring the point up that it "can" happen. Like you said it took time, but if it can be avoided then why not look into it. I am just as bad as anyone else about that. Our Funnycars got much different treatment than our play boats do. I just wanted to clarify that the issues that I know of had nothing to do with the paper itself.

Paul
 
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