Rb20 On 91 Fuel

[GH05T]

Just wondering if a stock rb20det will be fine as a daily on 91 fuel?

[Bsa]

I accidently put it I'm my 32 once and it ran like total crap. Why wouldn't you just use 98

Edited October 12, 2011 by Bsa

[GH05T]

Conpany payes for my fuel but they don't want to go for premium. I'm working on it but I just wanted to ask the question.

[GTSBoy]

Basic map of RB20 is tuned for Jap fuel which was pretty much always better than 95 RON. Running on local 91 will almost certainly see you running on the knock maps, which are quite a bit richer and retarded than the normal map, and it will be a slug. And it will probably still ping, especially in summer.

[Moodles2]

It might be possible it will chew through more fuel when running 91 running on those said knock maps, than 98.. even on 91 I wouldn't dare go up a hill or put any kind of load whatsoever on the engine (even beyond 4000rpm on a level road)

[XRATED]

Just don't do it...

[Room42]

I have run 91,95,98 and some other crap with 98 to make it higher octane. At the time I had a stock turbo and a power fc. Basically with running 91 I had to take out about 6 degrees from memory so it wouldn't knock. It wasn't a hell of a lot slower but it was still fairly noticeable. Considering there is only a 5 dollar a tank difference between 91 and 98 when you fill up, you should use the good stuff.

If you have a stock computer definitely use 98 or better.

[Crans]

Tune it for 91 and you will be fine otherwise 95 is a minimum

[paulr33]

yep, if you tune for it (or remap for it) its fine

but it will be sluggish and youll be limited to a low amount of boost

so if you are ok with that, go for it

but imho it would be pretty dull and sluggish