Octane vs E-85 content

[49-blues]

Is there anyway of telling what octane you have according to what the % of E-85 is in the tank?

 

[Rafs-T-Type]

Nobody seems to be able to agree on the octane of E-85 itself, so I have my doubts. There's more then one method of determining the octane which adds to the confusion.

 

[49-blues]

It would be great if we could get an accurate octane reading from the percentage of E-85 content in the fuel- even if there were a chart to go by .

 

[626gn]

I use this http://www.intercepteft.com/calc.html

The problem is finding out exactly how much Ethanol (and octane) is actually in the fuel at any given time. For that you need to manually test with something like this http://www.summitracing.com/parts/qft-36-e85

 

[626gn]

Forgot to add that you can use a Hydrometer to check octane numbers.

 

[Rafs-T-Type]

Forgot to add that you can use a Hydrometer to check octane numbers.

Say what? Care to elaborate?

 

[49-blues]

A hydrometer? What's the procedure? Very interested!

 

[49-blues]

Thanks for all the info.

 

[626gn]

Never done it myself but we have a local racer here (when we had a track) that goes out and checks octane levels with a Hydrometer and reports it on his weekly automotive radio show. How accurate these types of tests are can be argued, I suppose. An internet search on the subject should shed some light.

 

[49-blues]

I ll have to check this out!

 

[Rafs-T-Type]

I ll have to check this out!

Here's one...with a link to the instructions - http://www.goodvibesracing.com/moreinfo.php

 

[49-blues]

I could not anything on their great site about E-85 or octane

 

[Rafs-T-Type]

I could not anything on their great site about E-85 or octane

Oops...something is screwy and I can't link the page I was on. Here's a link to the hyrometers - http://www.goodvibesracing.com/hydrometers.htm. Not too much info on it though.

 

[49-blues]

I m not sure how these readings can translate into octane readings but I bought one anyway, I ll let you know if I figure out how to get octane readings from this- thanks for your help!

 

[626gn]

I've been invited to see a demonstration on how to use the Hydrometer and how to get octane readings from it. Problem is finding the time. I'll post here if I ever go.

I was given the source of the Hydrometer they use here. Attached is their catalog. See pages 196 to 201. Can't find any info on how they translate readings into octane numbers though but I guess I'll find out if I ever go to that demonstration...We'll see...

 

[49-blues]

Incredible amount of information- thanks, I would to go to that demo but I'm about 1000 miles away!

 

[626gn]

Incredible amount of information- thanks, I would to go to that demo but I'm about 1000 miles away!

Think I may have gotten a C in science class so I'll have to try real hard to digest that info myself. Lol.

Everyone can use a vacation to Hawaii... Let me know.