octane question

[Mihnea Cotet]

AFAIK those engines run a low CR (8.5:1, correct me if I'm wrong) so I 
think 91 is enough with factory timing advance settings. However, you can 
get a bit more out of the engine by dialing more advance in and running a 
higher octane fuel. 93 or 94 R+M/2 with 6 more degrees advance should make 
a pretty noticeable difference in engine behavior IMHO.


HTH,

Mihnea

At 17:56 7/01/2004 -0800, Tom Love wrote:
>I have a question as to what US octane is preferred for our 4kq jt engines
>(or in that case any 2.1, 2.2 stock 5 cyl NA motors).
>
>  This is a issue floating around on the quantum syncro list and since I
>drive both jt code cars I thought I would throw this question to this list
>for comments and suggestions.
>
>Any input is appreciated.
>
>btw I use 91 for what it's worth
>
>
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