Miata Mailing List: December 1996, Message #67
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   From: (none)

Subject: CA GAS AND DETONATION/KNOCK

   Date: (none)



>Hi all...



>Am I the ONLY person on the list who is having a problem with knocking & gas?

>Even if there *is* something weird about Shell (and now Chevron) gas, if Enzo

>is the only Miata out there which is having a problem then there is

>(obviously) something wrong. I can't keep trying different gas brands, hoping

>one will prevent the knock. That's just treating the symptom, not the

>problem.

>



>Happy Motoring!     -ZACK

>

>|\  Kerim Zackariah Broadbent         #176 CS

>| \  RacerZack@aol.com                 Cal Club &

>|  \  red '94 Miata, "Enzo, Jr."        San Diego

>|___\  PLAY CAR in Fullerton, CA         SDMC/SOCALM

> 1904   ============================      Team Voodoo

>         24 Units until I graduate from Cal Poly!!!!!!



HEY WHAT DO YOU KNOW, ANOTHER KNOCK CANIDATE!! WELCOME TO THE SCHOOL OF

HARD KNOCKS.



RZ:

LET IT BE KNOWN A LOT OF MIATA ARE KNOCKIN AWAY THIS PAST YEAR. MINE NEVER

DID ('91) UNTIL I SUPERCHARGED IT. I WENT NUTS. WIRED UP AN MSD UNIT,

RAN 108 OCTANE FUEL....UNTIL I DID SOME READING....CHECK OUT MIATA MAG TECH

ISSUE AND SPRING ISSUE, NOTICE THREE "HELP ME" LETTERS CONTAINING

INFO ABOUT THIER STOCK MIATA KNOCKIN'. I DID SOME I-NET RESEARCH AND FOUND

SOME OTHER MIATA OWNERS A KNOCKIN WITH SUPERCHARGED ENGINES.



SO YOU ARE NOT ALONE.



RUN 92 OCTANE FUEL. ONLY ANSWER. ITS OUR REFORMULATED GAS IN HERE IN CA.

ITS MADE TO RUN LEANER TO MORE COMPLETELY BURN OFF THE CO

(CARBON-MONOXIDE)...PROBLEM IS, IF ITS LEANER/EASIER TO BURN...WHAT HAPPENS

IN THE INTAKE TRACT?????



PING, PING, PING.



I SOLVED MY PING DILEMA IN MY S/C '91. TURNED BACK THE TIMING TO 8 DEGREES

WITH AN MSD CONTROLLER. THIS WINTER I GET A FEW STILL. WINTER THE GAS

COMPANIES RE-DO THE FUEL TO BURN LEANER ANYWAY TO HELP THE CARS START IN

THE AM AND SUCH...SO I'VE RUN 108 OCTANE IN THE TANK TO HELP QUIET IT DOWN.



SOUND OKAY. NO FIX SORRY. GOOD LUCK.



-PERCY

M.RODSTER PERFORMANCE