jrm81bu wrote:Chris Van wrote:Well my car ran worse with a mixture of 93 and E85. I have no scientific formula for coming to this conclusion but what I do have are the time slips to prove it.
What did you do to your set up to take advantage of the change? If you're not pushing detonation with you're set-up there isn't a lot to gain.Bonnewagon wrote:OK well I'm no genius nor an engineer nor a chemist. I'm just a guy who likes to play with Q-jets. So someone tell me why a bone stock motor with a stock 1980 TA 301 Q-jet set up to a much richer 1979 TA 301 specs detonated all the time and then richening up the jets by 3 more numbers cured it. No other changes were made to anything and there were no vacuum leaks. I was tempted to fool with the vacuum advance first, but to prove a point to myself, I didn't. And how stock is this 33 year old carb? It still has rivets on the choke housing. I'm pretty sure I didn't accidentally "fix" something else during the rebuild.
I have every bit of faith that you know what your doing. I have no reason why anything you did fixed anything you had a problem with, but i'm guessing you are inlcined to believe you think your need for running pig rich is because of a tiny % of thermal output? Your comparison of the alcohol(methanol) drag racers needing to double up has nothing to do with the alcohol(ethanol) in your pump gas. They are two very different creatures.79wagonator wrote:Well.. being the gas alcohol mixture has less thermal energy even by just a small amount
Being jetted the same as for running pure gas it would run slightly lean thereby causing more heat
which in turn = Detonation!
Makes perfect sense to me..
Good call Bonnewagon..
Everybody knows your gas mileage sucks with E10 as compared to straight gas..
Not a problem with newer injected motors as fuel, air and timing is automatically adjusted to compensate.
Sucks for older cars like ours..
E10 is even worse for boats with constant loads on motor and fuel sitting for longer periods evaporating and absorbing moisture from the air with vented fuel systems.
Now there pushing for e15 in some states... F&*k That!!
Is it really helping in any way? I don't think so..
You need to do more research. On e10 not changing your jetting would have almost no effect on you mixture let alone enough to go lean enough to cause a pinging issue. Your mileage shouldn't see any more of change than any other naturally occurring events would make it vary(wind, other drivers, your mood). Why would the "newer injected motors" not see a drop in mileage? They are programmed to target a certain mixture ratio, and if by your reasoning it would take more gas with ethanol in it to make that same ratio then they would lose the same mileage that any other vehicle would. Why would it be worse for an engine that sees constant loads? Yes ethanol absorbs moisture, it also hols it in suspension. The only time that causes a problem is when it gets more moisture than it can hold then it drops out. However the more alcohol, the more moisture it can actually hold, so a higher level is actually better in that respect.
And yes if it's handled correctly it can definitely help, however there is way too much politics involved in that for discussion here.
I guess I wrote it wrong, newer motors see a drop in mpg also is what I've heard from people in areas where pure gas and e10 is available
On LI only e10 is available.
As far as the high performance boating community, nobody likes the e10 which in my area is whats sold at the docks also.
And being able to absorb more moisture cant be a good thing..
I'm no scientist but Last I checked, water doesn't burn
I drain the fuel tank in the boat at the end of every season and burn it in my truck.