1983 camaro

35

Asked by Jul 23, 2008 at 10:45 PM about the 1983 Chevrolet Camaro

Question type: General

with 13:1 compression, how hign should i run high octane?

7 Answers

9,755

93 octane or higher. Running 305 heads??

1 out of 1 people think this is helpful.
70

if you want to make the good power your gonna have to run race fuel, like at least 110. dont think i'd even try it on 93 even if you back the timing off

1 out of 1 people think this is helpful.
35

thanks

35

thank u

175

agreed, with 13:1 yer gonna need some serious octane if running any sort of advanced timing. My 8.5:1 compression ratio needs 91 with 12 BTDC

9,755

All right guys. I built a 355 sbc with 13.5:1 compression. It was built for 100 octane race fuel. A 12:1 High performance SBC only requires 91 octane. A stock SBC runs between 8:1 and 9:1 and uses 87 octane. If anyone needs more info on how octane works, I can let you know. Higher octane does not always equal more horsepower. It has to be balanced with the build of the engine. He can run 93 octane along with slightly turning back the timing. That is all I did for mine for street use. Entirely different story at the track. It would be happy at 100 octane.

175

It all depends on timing and fuel mixture dude, my pontiac won't run 89 or 87 without pinging at full throttle, and I'm running 8.5:1. If I back off the timing to 10 or 8 BTDC, then yes, I can run lower octanes. 13:1 at 12 degs is going to ping/detonate on lower octane fuels (93 or lower). going to 6 or 4 would alleviate it but not take it all out necessarily. Octane will not necessarily give you more horsepower, but it'll certainly keep an high compression engine from spitting out a headgasket or melting a piston. If you richen the mixture, that will also quench the heat and therefore detonation, but again, power will be down as a result. A properly tuned engine at 13:1 at 10-12 degs is going to need more than 93.

Your Answer

Add photo

Related Questions

Camaro

Looking for a Used Camaro in your area?

CarGurus has 38,867 nationwide Camaro listings starting at $1,250.

ZIP:

Search Chevrolet Camaro Questions

Chevrolet Camaro Experts

#1 dandyoun
dandyoun
Reputation 1,720
#2 carGrrl
carGrrl
Reputation 1,130
#3 Tom Demyan
Tom Demyan
Reputation 1,030
View All

Related Models For Sale

Used Ford Mustang
396 Great Deals out of 44,403 listings starting at $1,000
Used Dodge Challenger
233 Great Deals out of 24,977 listings starting at $7,988
Used Dodge Charger
392 Great Deals out of 30,065 listings starting at $2,343
Used Chevrolet Corvette
202 Great Deals out of 20,888 listings starting at $4,993
Used BMW 3 Series
1,461 Great Deals out of 38,438 listings starting at $1,700
Used Chevrolet Impala
798 Great Deals out of 34,708 listings starting at $799
Used Ford F-150
2,876 Great Deals out of 212,656 listings starting at $1,000
Used Pontiac Firebird
13 Great Deals out of 797 listings starting at $2,991

Used Cars For Sale

2017 Chevrolet Camaro For Sale
24,702 listings starting at $19,800
2016 Chevrolet Camaro For Sale
17 Great Deals out of 2,097 listings starting at $17,999
2015 Chevrolet Camaro For Sale
68 Great Deals out of 2,736 listings starting at $12,950
2014 Chevrolet Camaro For Sale
65 Great Deals out of 2,025 listings starting at $11,995
2013 Chevrolet Camaro For Sale
49 Great Deals out of 1,549 listings starting at $10,895