LauraJ (Veteran)  |
| Thu Apr 19, 2007 10:13 pm |
| I trust the engineers (particularly filtered through lawyers) |
The engineers or tech writers who wrote the MOM said 87 octane, and that even passed the lawyers without comment. You know, if it gets to you, it's going to be a safe choice.
So, that aside....
My (very limited) understanding is that high compression is not the only factor in preignition -- displacement is also very important. I had the exact same reaction the first time I put the compression ratio and recommended octane facts next to each other in my brain. Perhaps there's some critical mass which is reached in a bigger piston, or it's a heat thing, or who knows what.
What I do know is that I've successfully run 87 octane in a Ninja 250 for about 30,000 miles. No pinging, no knocking, despite my portly weight and running in hilly country.
|
|
|
Maybe I get this. — DKspokane, Fri Apr 20, 2007 12:50 am -
Re: Right here is your problem... — DKspokane, Thu Apr 19, 2007 9:57 pm
-
I trust the engineers (particularly filtered through lawyers) — LauraJ, Thu Apr 19, 2007 10:13 pm
-
Re: I trust the engineers (particularly filtered through lawyers) — DKspokane, Thu Apr 19, 2007 10:25 pm
-
Re: Have any 87 vs premium dyno charts? (n/t) — ck85abc3, Thu Apr 19, 2007 8:42 pm
-
I do, and have been looking for them........ — BrianM, Thu Apr 19, 2007 8:50 pm
-
lol!;
(n/t) — Phrack, Thu Apr 19, 2007 7:56 pm