Posted By: theman440
What octane really needed ? - 03/31/11 12:39 AM
11.1 CR w/aluminum head (track only car)
What octane really needed ?
Posted By: bonefish
Re: What octane really needed ? - 03/31/11 01:51 AM
id say 110 is more than good,mabey even 93 pump gas. 
Posted By: MR_P_BODY
Re: What octane really needed ? - 03/31/11 02:18 AM
Quote:
11.1 CR w/aluminum head (track only car)
Whats the cam... when the intake closes it starts the
compression cycle
Posted By: Anonymous
Re: What octane really needed ? - 03/31/11 02:48 AM
50/50 with 110 and sunoco 93 will be perfect.
Posted By: Jeepmon
Re: What octane really needed ? - 03/31/11 05:04 AM
In my 73 small block stroker.. 11:1 with Aluminum heads.. its 91 octane for the street.. 98-100-104 at the track...
260=ish duration, 108 LSA, 36 degrees timing, all in at 3000 rpm..
260=ish duration, 108 LSA, 36 degrees timing, all in at 3000 rpm..
Posted By: qwkmopardan
Re: What octane really needed ? - 03/31/11 06:28 AM
mix 4 gallons of 93 with 1 gallon of 110.
Posted By: MR_P_BODY
Re: What octane really needed ? - 03/31/11 07:12 AM
I dont know how you guys can suggest a certain octane
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
Posted By: 383man
Re: What octane really needed ? - 03/31/11 07:17 AM
Quote:
I dont know how you guys can suggest a certain octane
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
Ron
Posted By: qwkmopardan
Re: What octane really needed ? - 03/31/11 08:11 AM
Quote:
I dont know how you guys can suggest a certain octane
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
A new grade of gas. pee85. He offered little info and what he told us: 11 to 1, aluminum heads and track only. You can bet it has a long dur. cam and intake is'nt closed 20deg A.B.C. It will probably run fine on 93 oct. but being at the track and 110 gas will be avail I suggest adding 20% 110 to be sure. If it detonates and pushes out the head gaskets try higher octane next time.
Posted By: therocks
Re: What octane really needed ? - 03/31/11 01:44 PM
I run 93 on the street in my 440 with 12.5 domes and aluminum heads.Just cant really lay into it or it gets ping.If I mix 110 at about 50/50 its perfect.At the track I run mostly 110.Rocky
Posted By: MR_P_BODY
Re: What octane really needed ? - 03/31/11 02:20 PM
The reason I said is I use to run 112 and dropped down
the octane and picked up ET... just by lowering the
octane... nothing else... and my cam is big duration
but a wide LSA
the octane and picked up ET... just by lowering the
octane... nothing else... and my cam is big duration
but a wide LSA
Posted By: emarine01
Re: What octane really needed ? - 03/31/11 03:30 PM
Quote:A Mod with humor
I dont know how you guys can suggest a certain octane
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
Anyhow... ya gota know where your intake closes to answer your question otherwise its like Mike said 
Posted By: Crizila
Re: What octane really needed ? - 03/31/11 03:35 PM
Quote:
I dont know how you guys can suggest a certain octane
without knowing when the intake closes... hell if the
intake closes with the piston half way up the cylinder
he could pee in the tank and it would be fine....JMO
and thats not the only consideration, although pretty high on the list.
Posted By: MR_P_BODY
Re: What octane really needed ? - 03/31/11 03:38 PM
A Mod with humor Anyhow... ya gota know where your intake closes to answer your question otherwise its like Mike said
EX-mod
Anyhow... ya gota know where your intake closes to answer your question otherwise its like Mike said EX-mod
Posted By: emarine01
Re: What octane really needed ? - 03/31/11 04:22 PM
Quote:
A Mod with humor
EX-mod
Well that would explain the humor
Oh... if ya dont know your cam specs, compression test and post the results
Posted By: fishy340
Re: What octane really needed ? - 03/31/11 08:46 PM
Quote:
mix 4 gallons of 93 with 1 gallon of 110.
thats what i do.