What are your thoughts on mixing 110 and 93 unleaded at a 50/50 ratio,for a 10.25,Eddy headed 448? Any benefits at all? Thanks for your opinions and/or experiences with trying this! Randy B.

Probably overkill.
I think that with aluminum heads and 10.25:1 , pump gas would be O.K.
I don't know that there is any more power to be had by using more octane than you need to avoid detonation.
You could throw a little more timing at it if it likes it , but unless you are near detonation , I bet 93 would be fine.

I run 10.15 to 1, .050 quench, 440-1 heads, timing at 36. I tried 50/50 92 with C12, Tried 2/3 92 with 1/3 C12. Mine runs better on just 92. And a lot cheaper.

I agree with most that you should not need anything more than 93 octane pump at that CR. It should be faster on that octane too. Especially if you have a quench distance of .055" or less.

no gain. my 11.2 hemi only gets a little splash of 110 and dont even think i need it but afraid of detonation .its a full race application.i think your safe with 93 octane.

Why not just use E85?

I agree with the E85 makes it more economical to race and will have my car burning corn again soon.

However if E85 is not available around you or you do not want to convert your carb you will be fine with 92-93. I have about the same setup as you 11.1:1 comp ratio 440 with eddys. I run strait 110 when I race but see no gain. My main reason for running it is consistency of the fuel. You dont always know what is coming out of the pump.

If the car is going to be a driver and an occasional racer I would run 92-93. If shes not running as consistent as you would like her too dump 5 gallon of 110 in when you get to the track.

I have raced my 10.? to 1 (supposidly)408 on pump 93 ,87 with 104 added ,and 110 Sunoco.It runs the same ET's on all three.I use 110 Sunoco now mainly because i like the way it smells over pump gas ,and like was said earlier i dont worry about consistancy of fuel or detonation.Mine is a drag only car that i dont race much and i dont use enough to make much difference in $$.I found a local station here in my town that sells it to the dirt track guys .Its 5.99 a gallon at the station ,lots cheaper than buying it at the track.I dont think you will notice a gain with your compression level either ,but thats not the only reason to run it IMO...

dont think you will need a 50/50 ratio but splashing it never hurts. Detonation is one of the worst things to do to a race motor, so a little splash of the good stuff for added insurance never hurts.

There are a few of us here that run similar combos.10.3 to 10.7 to 1 440's with Edelbrock heads and run on pump premium.
Back to back tests against 110 show no difference.
As far as being consistent,some of the winningest cars out here run pump premium,I wouldn't worry about it.Just buy from a reputable station.

Wallace Racing has a calculator that will calculate your octane rating for a particular mix. I am currently running 110, on a 11:1 iron head 451, but at $8.50/gallon I am going to investigate trying a mixture which produces a 100-105 finished product. At 50/50 110 to 93 I can get around 102, which I am hoping will suffice. My effective compression is only 9.50, so I am think I should be ok.

Thanks everybody! Mike,I distinctly remember that my cranking pressure was right at 185,last spring when I checked it! Even though it runs great on the 92-93 octane,even with 38-40* total timing,I might just "splash" a little 110 in at the track, like Matt suggested. Maybe 1 gal. 110 and 4 gal. 92-93. Just for the track. I usually run the timing around 35-36 on the street,and never notice any detonation whatsoever! Thanks again Guys! Randy B.

Only one mention so far ........ but I have to admit , I love the smell of burning race gas too.
It would be worth a splash just for that.

10.75:1 in the Charger , E heads, solid cam, etc,,,and i just run pump gas......

I'd think for the stret especially w/ the aluminum heads 93 is fine. At the track you could maybe get 3 gallons mix w/ 5 of 93 and blast it. I was running 93 in my 440-6 w/ 10.7:1 (iron heads) with no problems. That was 36*. I was going to get a few gallons of 110 at the track and bump it to 38*

If its the smell your after they sell that great smelling "groovy grape" that you can dump inthere but then everybody follows you through the pits sniffing your pipes! LOL.I used to run that in the bee and the dart just to make people wonder.they have all different flavors too. I love your GTX BTW,have a soft spot for those.Good luck!

this is the stuff...

Thanks,Chris! I do LOVE the smell of "race gas" but I was looking for power enhancement possibilities with the x-tra octane! BTW...out of curiousity,where did you purchase the Groovy Grape?