What a difference 93 to 110 octane

[Moparal]

With the stations running out of fuel around here, I had to wait for chevron to get some 93 premium . When they got it. It cant be 93 this time cause my car pinged real bad like it was a lower octane. It will ping on 92 and this time it was worse

I drove to a station 8 miles away, they sell 110 racing gas at the pump for 6.45 a gallon. I had around 8 gallons in my car and put 7 more of 110 into the tank to fill it up.

The gas seems to mix right away. Even in the bowels and lines somehow. Because after 3 or 4 minutes, I could romp on it and no pinging anywhere. Even in 4th at 45 mph. Makes me want to bump the timong up some more. Starts better and seemed to idle higher to.

[DoNotChallengeHer]

With the stations running out of fuel around here, I had to wait for chevron to get some 93 premium . When they got it. It cant be 93 this time cause my car pinged real bad like it was a lower octane. It will ping on 92 and this time it was worse

I drove to a station 8 miles away, they sell 110 racing gas at the pump for 6.45 a gallon. I had around 8 gallons in my car and put 7 more of 110 into the tank to fill it up.

The gas seems to mix right away. Even in the bowels and lines somehow. Because after 3 or 4 minutes, I could romp on it and no pinging anywhere. Even in 4th at 45 mph. Makes me want to bump the timong up some more. Starts better and seemed to idle higher to.

You shouldn't be running that in the mini bike. No wonder it got away from you.

[Moparal]

You shouldn't be running that in the mini bike. No wonder it got away from you.

There's a gremlin following me around.   Ahhh  she can tag along, I like being cheered up

Mini bike with 440-6 installed

[MEK-Dangerfield]

If your engine isn't too radically modified, then 93 octane should do. Being in your area though, given the hurricane... who knows what they are throwing at you.   

[Moparal]

Compression is up there pretty good on mine.
10 in the hole
steel hg
shaved heads with bigger valves

[Supercuda]

Al, is E-85 available in your area? It would be worth the minor modifications involved, to run 110-115 octane for about $3.00/gallon. I know this, because I run E-85. High-octane fuel here is also at least $6.00/gallon, and I decided to try it after the pump premium fuel I was running, climbed to over $3.50/gallon, with no end in sight. I will not go back to gasoline. Corn likker is much more fun. As for the immediate change in performance, yes, it does mix right away. Fuel pouring into a confined space through a small opening tends to do that. I was able to increase my initial timing from 14 degrees to 20 degrees, with just the change that you have done to yours, in the fuel department. Switching to E-85, I found that I can run 18 degrees initial, with a huge gain in performance, akin to the 20 degrees and 50/50 premium and 110 octane fuel. Just a few thoughts to get your brain wondering.

[Moparal]

Thanks supercuda. I am growing tired of this little engine already. Im thinking about passing it on now. Im planning on building a 13.5/1 indy head engine very soon. This engine isnt but around 425 hp or so I would imagine. I could squeeze more out by adding headers,a bigger exhaust and what not, but dont really want to go that route. I dont see e85 in our area. I did see 1 station saying 10% methanol.

I got this shelby daytona here I am planning on doing something with very soon.  Basicly, this car I have now is going to be for touring . I keep getting wild ideas on what I want to do, then change my mind. I should just do another car and leave this one as it is.  It will do 6k in fourth gear and gets around 15mpg if I just go easy on it and use the 2bbl. I was gonna drive it to carlyle or how ever you spell it.

[71chally416]

What year is your Daytona? They are cool cars. I drive mine daily and it's good on gas, even with the 3L Mitsu V-6. Not as good as my old Turbo Z with the 2.2 Turbo though.

[Moparal]

the one in my shop now is an 89. I have 3 shelbies

[Marquis_Rex]

I bought my car a couple of months ago- except the guy who sold it to me didnt know the exact specs of the engine.
His employed mechanic took a guess that it runs a 750 CFM Holley and about an 11:1 CR.
The way the car idles- its pretty obvious its a very agressive cam- probably as agressive as one could go with a hydraulic lifter cam (292-296 duration 0.55 lift?).

Since then I've had the valve covers off and various parts out, done my ressearch and found I infact have a Holley 3310-4160 750 CFM carb, Mopar single plain inlet manifold with air gap, ductile cast iron 1.6 ratio rockers, 915 closed chamber heads (78.3 ccs I think) and when I took the oil pan off I could definately see TRW forged pistons. Looking up the catalogue website specs I reckon its running 11.3:1 (it could also be 10.3:1) as the car knocks quite badly in the summer heat even with the agressive camshaft its running, at low engine speeds when pulling away.
I mix 110 octane leaded with 93 octane. I've managed to get the mix down to about 5 gallons of 110 octane and the rest as 93 octane and there's no knock.
I'll have to get the strobe out and start 'bumping the ignition curve' next....

[Oldschool]

Hey Al,   this stuff works awesome.  I have run it in my little "A" body many times.  It is cheaper than race fuel and it flat works.  I think MEK has also used it and he agrees that it works.  It contains tetraethyl lead, so it is the real deal.  You simply follow the chart to get whatever octane you desire.     

http://www.kemcooil.com/products.php?cId=4 

[DoNotChallengeHer]

the one in my shop now is an 89. I have 3 shelbies

I have 1 Shelby............................and she owns a Daytona. 

[Oldschool]

I have 1 Shelby............................and she owns a Daytona. 

Good one..       It also happens to be true....           

[Moparal]

Good one..       It also happens to be true....           

Jackies is a 1 of 1. 

[Supercuda]

Al, never run methanol in your car. That crap will poison you, and eat every component it touches. Use high-octane gasoline, or E-85. If we are lucky, more E-85 will become available soon, nationwide. Marquis, it sounds like you have a fun ride, too. I am a fan of high cylinder pressures, and compression is our friend. It has taken the manufacturers a long time to grasp this particular concept, and it seems to have taken the performance aftermarket even longer to get on board. Guys, it is also important to remember that aluminum heads aren't as thermally efficient as iron, and thus require at least an additional point of compression to run with comparable iron head engines.