C1 Fuel Injection Octane needs.

[Richard S.]

I have 3 options for fuel for a Fuel Injected 60 and need to know the differences and which will work best with my FI unit.
Option #1) Have 55 gallon drum of 110 or 114 octane with lead delivered to my home.
Option #2) Drive 30 minutes to the nearest Service Station that sell 100 Octane.
Option #3) Order Max Lead 2000 with Tetraethyl Lead and add to 93 octane Ethanol.

Again I know that option #1 will cost a lot more however, the question is which will provide the best results- or are they all about the same?

[Edward J.]

Re: C1 Fuel Injection Octane needs.

Richard, Its not good idea to store a 55 gallon drum of fuel a home. I would think driving to a gas station that has the 100 octane fuel. and maybe buy a few bottles of lead, All though not necessary.

[Duke W.]

Re: C1 Fuel Injection Octane needs.

I have 3 options for fuel for a Fuel Injected 60 and need to know the differences and which will work best with my FI unit.
Option #1) Have 55 gallon drum of 110 or 114 octane with lead delivered to my home.
Option #2) Drive 30 minutes to the nearest Service Station that sell 100 Octane.
Option #3) Order Max Lead 2000 with Tetraethyl Lead and add to 93 octane Ethanol.

Again I know that option #1 will cost a lot more however, the question is which will provide the best results- or are they all about the same?

There is absolutely no need to use anything other than the highest available pump premium if the engine still has the OE pistons or something close. If it has head gaskets thicker than .018", which is typical if the engine has ever been rebuilt then it may not even need premium.

The answers and reasons why are in this pdf:

http://stlouisncrs.org/news_files/DukeWilliamsEngineTuningPerformance&EconomySeminar.pdf

Duke

[John D.]

Re: C1 Fuel Injection Octane needs.

Richard, Other options: Google Pure Gas.com to find a station near you that sells pure gas.
You mentioned 100 octane. Try 100LL aviation.
Or have your fuel injection, etc rebuilt for ethanol like a lot are doing.
Then just run the highest octane crap gas you can find. John

[Don H.]

Re: C1 Fuel Injection Octane needs.

Richard, I have ran aviation fuel (100LL) for about 30 years in my '60 and it works great. You can't pump it directly into the car so I have two 5 gallon cans. I do run pump gas when I have to (traveling) and as stated, use the best you can find. Hot weather re-starts are where you will notice the biggest difference. When any O-rings are replaced or it is rebuilt, be sure to use Viton O-rings (for ethanol fuel). John is the expert so he can help you if needed. Good luck, Don H.

[Richard S.]

Re: C1 Fuel Injection Octane needs.

The Genesis of my orgional question was based upon a statement by Jerry
Bramlett: "WARNING: a 1957-1965 Rochester fuel injection system will NOT always work properly on a stock engine using modern pump gasoline. You must use UNDILUTED 108 or 110 octane racing gasoline in your car after I calibrate your FI unit to get its best preformance. If you're unable or unwilling to buy racing gas, please don't ask me to work on your FI systems"

This would seem to say to me that 100 octane Aviation fuel and 100 octane pump Racing fuel are better than ethanol but fall short or 110 octane Racing fuel. And, I am still not clear as to any advantage of a TetraEthyl Lead additive-if any.

Again, I have a source for 110 Octane Racing fuel but not 100 octane Aviation fuel and if 110 octane is superior to 100 for FI units, this this would be my first choice.

[Michael W.]

Re: C1 Fuel Injection Octane needs.

So someone please explain the hundreds if not thousands of FI owners that use straight pump gas without issue.

[Michael G.]

[Bob J.]

Re: C1 Fuel Injection Octane needs.

So someone please explain the hundreds if not thousands of FI owners that use straight pump gas without issue.

I'd say few are "without issue" if living in Fla. and driving in summers or storing their cars over long periods of time.

[Jim L.]

Re: C1 Fuel Injection Octane needs.

So someone please explain the hundreds if not thousands of FI owners that use straight pump gas without issue.

It's about 70 today in my part of the People's Republik of Kalifornia and we're still getting winter fuel. I defy anyone to drive their early fuelie in traffic with this combination without experiencing a fuel perc issue.

And, yes, I have just returned from such a drive with my '60 fuelie.

Jim

[Michael W.]

Re: C1 Fuel Injection Octane needs.

It's about 70 today in my part of the People's Republik of Kalifornia and we're still getting winter fuel. I defy anyone to drive their early fuelie in traffic with this combination without experiencing a fuel perc issue.

And, yes, I have just returned from such a drive with my '60 fuelie.

Jim

This problem, as well as Bob J's has nothing to do with octane levels but with RVP (Reid Vapour Pressure). The OP asked about octane. While it's true that some have percolation/vapour lock problems, not all do. I'll go out on a limb and say none have an issue with detonation.

[Jim L.]

Re: C1 Fuel Injection Octane needs.

This problem, as well as Bob J's has nothing to do with octane levels but with RVP (Reid Vapour Pressure). The OP asked about octane. While it's true that some have percolation/vapour lock problems, not all do. I'll go out on a limb and say none have an issue with detonation.

I understand RVP, but the OP asked:

the question is which will provide the best results

Your answer was non-specific:

So someone please explain the hundreds if not thousands of FI owners [ who] use straight pump gas without issue.

And I assert, with plenty of available proof, that it's not possible to use modern motor fuel in an early FI engine "without issue".

I'd be glad to hear from even one individual who can prove that I'm wrong.

[Michael H.]

Re: C1 Fuel Injection Octane needs.

This problem, as well as Bob J's has nothing to do with octane levels but with RVP (Reid Vapour Pressure). The OP asked about octane. While it's true that some have percolation/vapour lock problems, not all do. I'll go out on a limb and say none have an issue with detonation.

So Mikey.....

Does this mean that you are finally admitting that there are issues with E10 for those of us that live south of the border?

I thought you told me it was mostly in my imagination.

Lockwood is spot on.

[Michael W.]

Re: C1 Fuel Injection Octane needs.

So Mikey.....

Does this mean that you are finally admitting that there are issues with E10 for those of us that live south of the border?

I thought you told me it was mostly in my imagination.

Lockwood is spot on.

Who mentioned E10? Your memory is short- I refer you to our 'evaporation experiment' conducted how X number of years ago where we found differences in yours, mine and Mike McK's fuel. Your swamp gas was by far the worst. I'm not sayng that nobody has problems with fuel I'm making the point that not everybody does and it's not down to octane rating.

Are you saying now that you can't use pump gas? That differs from previous discussions.

[Michael H.]

Re: C1 Fuel Injection Octane needs.

Who mentioned E10? Your memory is short- I refer you to our 'evaporation experiment' conducted how X number of years ago where we found differences in yours, mine and Mike McK's fuel. Your swamp gas was by far the worst. I'm not sayng that nobody has problems with fuel I'm making the point that not everybody does and it's not down to octane rating.

Are you saying now that you can't use pump gas? That differs from previous discussions.

No, that's not what I'm saying. In some of our previous discussions on this topic, I said that I could no longer use E10. I use ethanol free 92 octane in the 425 HP and the FI 63. Made all the difference in the world.

While using E10, I experienced erratic idle when at op temp. When shut off hot when arriving at a cruise-in, fuel boiled/bubbled out of both carburetor vents. Also from the bowl vent of the FI.

When home from the cruise, my garage would smell like fuel as the fuel in the bowl boiled off and after just a few hours, the bowl would be empty.

You suggested that I must have some other problem because that never happened to you. Could be right because I am kinda new at this mechanical stuff. You also mentioned that your carburetor would remain full throughout the long winter storage and if mine didn't, something else was wrong.

I agree, not everyone is reporting issues with FI units but that may very well be because of different blends of fuel around the country. We know it's not the same from region to region.

I once mentioned here, years ago, that E10 had a lower boiling point than pure gas but I was told by one of the experts here that it was just the opposite. I didn't argue. I've learned to ignore a lot here.

I just find it a bit humorous that some folks that have never owned a car with a Rochester FI unit seem to have all the answers.