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

10,665

93 octane or higher. Running 305 heads??

1 of 1 people found this helpful.
80

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 of 1 people found this helpful.
35

thanks

35

thank u

185

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

10,665

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.

185

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

Camaro

Looking for a Used Camaro in your area?

CarGurus has 31,253 nationwide Camaro listings starting at $1,450.

ZIP:

Chevrolet Camaro Experts

  • #1
    dandyoun
    Reputation
    1,760
  • #2
    carGrrl
    Reputation
    1,200
  • #3
    Tom Demyan
    Reputation
    1,090
View All

Related Models For Sale

Used Ford Mustang
573 Great Deals out of 38,832 listings starting at $1,895
Used Dodge Challenger
244 Great Deals out of 24,930 listings starting at $7,750
Used Chevrolet Corvette
168 Great Deals out of 17,406 listings starting at $3,000
Used Dodge Charger
444 Great Deals out of 33,205 listings starting at $1,999
Used Ford F-150
3,124 Great Deals out of 219,053 listings starting at $1,200
Used BMW 3 Series
1,072 Great Deals out of 32,576 listings starting at $1,200
Used Chevrolet Impala
570 Great Deals out of 34,332 listings starting at $900
Used Pontiac Firebird
9 Great Deals out of 763 listings starting at $3,500
Used Honda Accord
1,101 Great Deals out of 71,974 listings starting at $1,100

Used Cars For Sale

2018 Chevrolet Camaro For Sale
9,985 listings starting at $19,699
2017 Chevrolet Camaro For Sale
107 Great Deals out of 8,514 listings starting at $17,599
2016 Chevrolet Camaro For Sale
45 Great Deals out of 1,268 listings starting at $16,990
2015 Chevrolet Camaro For Sale
93 Great Deals out of 2,607 listings starting at $11,891
2014 Chevrolet Camaro For Sale
63 Great Deals out of 2,256 listings starting at $10,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.