boosted hybrid

Most every wideband reads in lambda, and converts to an "a/f" output. That is why you tune the same "a/f" for methanol, ethanol, gas, etc with most conventional widebands, its just a converted reading. The n/a engines that are high compression running e85 that i tune are all running in the 12-12.5:1 a/f range, they seem to pick up mph at the track running that fat. They are in the 14-15:1 comp range, not your average shelf part builds.

I have noticed little to no gain running e85 on all motor engines. I have done a back to back with a 93 octane engine, switching to e85 on the dyno and not losing or gaining power anywhere. Turbo/supercharger engines are a completely different story, i have seen 30-50whp gains over c16 from switching at high boost levels.

BearsEK-KMSU

Agreed, My motor wasn't shelf parts it had 14.6:1 compression and I never got to test the MPH thing. I understand your point I don't think it was worth any power either just broken parts even with careful plug reading.

bluedlude

stoich for E85 is 9.765. so running in the 12 AFR's is definately dangerous. no one uses thermocouples to measure EGT's? Theres a guy on here somewhere making over 600whp in his prelude running E85 and he was tuning to 10.5 IIRC. The corrosion is caused by the ethanol being oxegenated. anything other than stainless will rust really fast. its easy enough to check if its going to harm the stuff in your fuel system, fill a cup with the fuel and place samples into it. see what happens

BIGTUNA

Edit; BoostedHybrid already made the point too

Lol i cant believe what I am reading. Your A/F gauge has a conversion built into it, converting Lamba to A/F. 99 percent of A/F gauges are setup for gasoline or can read lamba. If you tune a ethanol E85 car using a gas A/F gauge then tune it to the same A/F's as u would for gas. I can change the fuel usage on my wideband from E85 to Methanol to Gasoline, but my motor ran the best at 13.1 if I left the setting on gas, switch it to E85 setting and it changes the log numbers to 9's A/F but in the in end its the exact same lamba reading. So if you wideband is meant to be used with gas, and the conversion from lamba to A/F is for gasoline then the A/F's you should see your gauge are the same you would shoot for if the car was on gasoline since the motor will run best at the same lamba.

Just my 2 cents and my experiences

PS went from E85 to cam2 and made the exact same power.

bluedlude

but for whatever reason no one wants to tune using lambda?

and i take it back, it was 512 whp

https://honda-tech.com/zerothread/1821413


Modified by bluedlude at 4:22 PM 6/4/2008

91civicDXdude

i've been running e85 for 8 months on stock fuel system with zero problems. I changed out my fuel pump for a walbro 255 about a month and a half ago and the factory (180,000 mile) fuel pump looked good as new. I haven't had a single problem with pump, filter, lines, valves, or any other non sense urban legends floating around.

If you are getting by on pump gas, you probably won't see much benefit from running e85, but e85 is higher octane than pump gas, burns cooler, plus the higher volume needed cools the cylinder even further, allowing for even higher compression/more boost.

Remember that it is a different fuel than gasoline and so requires a completely different tune. If you ran e85 on a pump gas tune i wouldn't expect it to gain any power, but tune it specifically for e85 and you should see some nice gains.

What really shines is when you compare e85 to race gas.. $2.50-$3.00 a gallon vs $6.00 a gallon is quite a difference.

BIGTUNA

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">
What really shines is when you compare e85 to race gas.. $2.50-$3.00 a gallon vs $6.00 a gallon is quite a difference.</TD></TR></TABLE>

Except for the fact you burn through the stuff fast.... so your really paying around 5 dollars in fuel to travel the same distance.

98vtec

e85 is almost the same price as gasoline where i live

91civicDXdude

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BIGTUNA &raquo;</TD></TR><TR><TD CLASS="quote">

Except for the fact you burn through the stuff fast.... so your really paying around 5 dollars in fuel to travel the same distance.</TD></TR></TABLE>

I use roughly 30% more fuel in a boosted application on e85 than on gasoline so assuming $3.90 a gallon... $3.90 &gt; $6.00

even $5.00 &gt; $6.00, and i'm not sure about all motor applications, but people have logged 20-30hp gain over c16 by using e85 in boosted applications.

DOHCter

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">

I use roughly 30% more fuel in a boosted application on e85 than on gasoline so assuming $3.90 a gallon... $3.90 &gt; $6.00

even $5.00 &gt; $6.00, and i'm not sure about all motor applications, but people have logged 20-30hp gain over c16 by using e85 in boosted applications.</TD></TR></TABLE>
you use approx %30 more at full load, but in cruising, and part throttle situations, you should be able to lean it out more than you would gas, and give it more timing, and get almost the same mileage as gas. so you have to look at the whole picture, not just the WOT/full load setup.