Highest Octane?
Depending on what DCR you're getting from your cam, I'd say 95-98. You might even get by with less octane if you have a really late closing intake valve. For comparison, I was running 11.1:1 and had a DCR of 8.25:1 and didnt have any ping with 90 octane. Water temps were 180deg. and I think the air temps were about 70's. Hotter weather I was running 92 and 93 octane.
formerly silverbrick (changed 02/17/2013)
iTrader: (5)
Joined: Mar 2006
Posts: 4,523
Likes: 0
From: Pasadena, Tx
umm, depending on the densities of the two fuels, one might float on top of the other. i would say no to mixing the fuels because you would probably end up using the leaded up then using the 93 cuz the leaded sink to the bottom of the tank. i think it would be ok to mix 2 different types of unleaded fuels though if you mixed 2 gals of 93 then 1.5 of some 105 unleaded or something
Trending Topics
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Running unnecessary high octane could have adverse effect and lower performance.
What is your DCR?
I run 94 Octane on 8.65 DCR and 11.75 SCR with no issues, and believe me 90* would be cool here.
Also running 1 step colder plug helps a lot.
What is your DCR?
I run 94 Octane on 8.65 DCR and 11.75 SCR with no issues, and believe me 90* would be cool here.
Also running 1 step colder plug helps a lot.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
