C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Fuel, Emission Control, and Exhaust Systems
Not Logged In! Login or Register!  Users Online: 13 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
Bair's Corvettes
VetteBookStore.com
CorvetteClothing.com
Volunteer Vette Products
Mid America Motorworks

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
71SHARK
71Shark
Featured Links

Buy Now
Corvette by the Numbers
Corvette by the Numbers


Collector's Originality Guide Corvette 1968-1982 (Paperback)
Collector's Originality Guide Corvette 1968-1982 (Paperback)


The Corvette Dynasty (Hardcover)
The Corvette Dynasty (Hardcover)


How To Rebuild Corvette Rolling Chassis 1963-1982
How To Rebuild Corvette Rolling Chassis 1963-1982



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
2/20/14 10:34pm - Original Message: '100 octane fuel'
rep69
Limited Member
- Send Private Message


Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
I discovered that I can buy 100 octane unleaded fuel at a local sunoco gas station. You can directly fill your car with this fuel. They also sell 110 octane leaded gas, but you have to use a gas can. I am curious if adding some to my tank will help the overall performance of my 1969 427 390 hp.  I have always burned 93 octane. The 100 ocatane is not cheap, around $7.00/gal.  Is it really worth the extra cost?  Thanks, Bob
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
2/21/14 12:34am - Reply: 'Re: 100 octane fuel'
F4Gary Gold Member
Gold Member
- Send Private Message


Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.

Joined: 8/26/2006
Posts: 869
My guess is it's not worth it unless it's a high compression engine that you race.

____________________________________
 Reply Reply  Quote Reply w/Quote
2/21/14 1:29am - Reply: 'Re: 100 octane fuel'
HighDesertDave
Former Member
- Send Private Message


Carson City, NV - USA

Vette(s):
Numbers matching 1972 350 4 speed, silver pewter body with blue interior

Joined: 12/4/2013
Posts: 239
The higher the octane rating the slower the fuel burns or resists ignition....thus reducing pre-ignition (pinging). If your not pinging you don't need it. So in the big pic, higher octane fuel does not increase HP. It does allow you to make modifications that do increase HP that bring along per-ignition tendencies. The higher the compression ratio the greater the tendency to ping...you will always see the hotted up factory muscle car engines have a higher octane fuel requirement.
Hope that helps you decide if its a good thing for you or not. You can also always blend the stuff down a bit too.
Dave

____________________________________
My Christmas present to ME! Bought Sat 11-30-2013. 72, 350 4 spd, Silver with blue interior...Can't you just hear Pablo Cruz playing in the background?

 Reply Reply  Quote Reply w/Quote
2/21/14 1:25pm - Reply: 'Re: 100 octane fuel'
rep69
Limited Member
- Send Private Message


Chesapeake, VA - USA

Vette(s):
1969 convertible 427 4speed

Joined: 7/24/2012
Posts: 130
Thanks for the info. I can always count on getting some good answers from the group
 Reply Reply  Quote Reply w/Quote
2/22/14 11:13am - Reply: 'Re: 100 octane fuel'
ARGYLE
Former Member
- Send Private Message


Cary, NC - USA

Vette(s):
1972 LT-1 Sunflower coupe 2004 Z06 Machine Silver

Joined: 12/15/2013
Posts: 8
Another plus for the 100 Octane is that it contains NO ethanol. Ethanol if stored in the fuel system over time is destructive on our older cars. Attacks rubber and holds moisture.
 
 


____________________________________

 Reply Reply  Quote Reply w/Quote
2/23/14 1:45am - Reply: 'Re: 100 octane fuel'
HighDesertDave
Former Member
- Send Private Message


Carson City, NV - USA

Vette(s):
Numbers matching 1972 350 4 speed, silver pewter body with blue interior

Joined: 12/4/2013
Posts: 239
I didn't know that about the 100 octane having no ethanol. I kinda have to recant a bit....ethanol make less power...also reduces your fuel mileage. We have it up here at 4800 feet...used to be winter only blend, now its 24/7/365. You can feel the lack of zip compared to 100% gasoline. So you potentially would feel a bit more "zip" with the 100 octane depending on the percent of your blend. You can also dial up a bit more initial timing advance. 14-15 degrees should be no prob for 100 octane. But if you took a trip and could only find 91 octane better carry your timing light.

____________________________________
My Christmas present to ME! Bought Sat 11-30-2013. 72, 350 4 spd, Silver with blue interior...Can't you just hear Pablo Cruz playing in the background?

 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Fuel, Emission Control, and Exhaust Systems
(Moderator: Adam Wartell, Norsky, Adams' Apple, kstyer)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30