E85 FAQ/sticky?
09-29-2012, 08:09 AM
#55
my injections go static at 7500.
there is nothing wrong with using 60# yes Im pushing them a hard but that not all the time. the engine dosnt really care wat size injector it has in it as long as it can keep up and the 60# do fine...
wat is safer about using 80s a fuel ratio is a fuel ratio.
there is nothing wrong with using 60# yes Im pushing them a hard but that not all the time. the engine dosnt really care wat size injector it has in it as long as it can keep up and the 60# do fine...
wat is safer about using 80s a fuel ratio is a fuel ratio.
09-29-2012, 05:23 PM
#60
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The cold start thing seems to give me problems when it gets cold, takes about 2 times to get her running after a cold morning and the car sitting. Other than that e85 is great I love it and I agree that 80#s should be used
09-29-2012, 06:17 PM
#61
sorry for being a ***** about it but I've had so many ppl tell me that 80s r required...but they r not its all in the tune. my 60# hold 11.7afr all the way to 7500rpm before it start to lean out to 12. i have a built engine cnc ported head and a m62 that has had a very extensive port and polish job done on it..my intake manifold has been cut apart and ported and polished. Im running a 2.8 on my m62 and get 18.5 psi by 7200 rpm..Im just trying to make a point here
10-02-2012, 03:30 PM
#66
what kind of power increase could one really expect switcing to this? i'm on 60#'s and 2.8" now, if i went to 80's e85 and a good (safe, very safe) tune, how much power/torque am i looking at? roughly ofcourse
10-02-2012, 03:39 PM
#69
You could make 290whp on that pulley and E85. Also, a good tune on E85 while being much more aggressvie than 91 (timing wise) will be much safer to run than even a somewhat aggressive tune on 91. The fuel just has such a greater margin of error, as the motor becomes much more forgiving when its happier (lower egts, more knock resistance).
Edit: I am going to add that I say that for the scenario above, E85 is the safer route, and for most setups on our platform. On our cars it seems to be the ringlands that break, due to knock, excessive EGT's, etc. The next thing is usually the sleeves. And again, with E85 the EGT's will be cooler resulting in a much "happier" engine. On many other platforms, where rods or bearings may be the weak point, E85 will not let you really push the envelope much safer than any other fuel. I say this because when you run E85 it is to take advantage of the cooling effetcs and the timing advance, and with timing advance comes more cylinder pressure, and cylinder pressure is what will kill rods in most cases. The integrity of the sleeve and piston will benefit greatly from cooler combustion temps, but the effect the temps have on the rods is much more minimal since they are not so much in the "line of fire" if you will. Basically, if you are tuned near the engines maximum safety threshhold, and you want to switch to E85, turn the boost down a little bit and get more aggressive with the tune to make the same power.
That doesn't all pertain to our platform, as 95% of people in here don't really ever have to worry about too much cylinder pressure for the LSJ/LNF, but it is still some food for thought for other platforms or the 2.2 guys.
Edit: I am going to add that I say that for the scenario above, E85 is the safer route, and for most setups on our platform. On our cars it seems to be the ringlands that break, due to knock, excessive EGT's, etc. The next thing is usually the sleeves. And again, with E85 the EGT's will be cooler resulting in a much "happier" engine. On many other platforms, where rods or bearings may be the weak point, E85 will not let you really push the envelope much safer than any other fuel. I say this because when you run E85 it is to take advantage of the cooling effetcs and the timing advance, and with timing advance comes more cylinder pressure, and cylinder pressure is what will kill rods in most cases. The integrity of the sleeve and piston will benefit greatly from cooler combustion temps, but the effect the temps have on the rods is much more minimal since they are not so much in the "line of fire" if you will. Basically, if you are tuned near the engines maximum safety threshhold, and you want to switch to E85, turn the boost down a little bit and get more aggressive with the tune to make the same power.
That doesn't all pertain to our platform, as 95% of people in here don't really ever have to worry about too much cylinder pressure for the LSJ/LNF, but it is still some food for thought for other platforms or the 2.2 guys.
Last edited by InfraRedline; 10-04-2012 at 02:27 AM.
10-04-2012, 02:05 PM
#73
I get anywhere from 18-21mpg in town depending on where and how I drive. Ive seen as low as 17 and as high as 22 a few times. On the interstate its usually around 22-23, although I did get 27 mpg crusing at about 72 mph for a tank one time. I don't do much interstate driving though.
10-04-2012, 02:07 PM
#74
me neither. 18-22 sounds fair to me. right now (running pig rich bad tune) im getting like 21. used to get 24 
i'm very excited to do this, its gonna be great making another 20ish horsepower, not to mention just having a good tune on the car finally should free up even more
BTW i'm lovin ur sig
i'm very excited to do this, its gonna be great making another 20ish horsepower, not to mention just having a good tune on the car finally should free up even more
BTW i'm lovin ur sig
Last edited by riceburner; 10-04-2012 at 02:07 PM. Reason: Automerged Doublepost