I know it is commonly recommended to put in 92 octane and dial in 17-19 degrees of timing, but with our sunoco 94, how much do you think is safe? Think we could go 20, 21 degrees safely? maybe this will give us a slight edge over the yanks
Hell, let's get JWT to make a canadian edition ECU upgrade LOL.

mines at 17* and i run 92 or 94 if i see it at the pump. 94 runs a little smoother i found.

I keep my timing at 21 degrees and I only use 92 octane. I've run as low as 91 octane and I've never had any detonation or any problems at all. Of course this is on my car, so if you try it and blow your car up you can't blame me :)

I've done some "midnight test and tune" runs with my buddy's NX. Experimenting with timing with both cars to compare, we found that 21 degrees vs 18 degrees was good for about 2 carlengths at the end of the 1/4 mile. (We both ran 18 degrees and were dead even, then we bumped my timing up to 21 and I pulled 2 carlengths, I dialed mine back to 18 and he bumped it to 21 and he pulled on me by about 2 carlengths.) Of course we never got any real dyno numbers..but whatever. My car runs great!

Son of skyline, are you serious?? That's sweet!

When I did my timing, I bumped it to 19 from a pathetic 5!

I shaved more than a second off my 1/4 mile time.

By the way, I use 94 always!

What do you think would be SAFE for the B15's?

They come with 15* stock so i was thinking 17ish...is that low? Could i go more safely?

Thanks

I say go to 19, but always use Sunoco Ultra 94, ALWAYS! Last week I put in '93 and the car ran like shit.

petro can is now selling 94 and it seems to make my car run as smooth as the sunoco 94. however that may be all in my head :confused:

Originally posted by 1dabred
petro can is now selling 94 and it seems to make my car run as smooth as the sunoco 94. however that may be all in my head :confused:

Probably not. It's good gas.

Sunoco and Petro-Can are the two cleanest gasolines in Canada. If I can't find Sunoco, I use P-Can.

Shell and Esso are the dirtiest. I never use them at all anymore.

My car always seems to run the best on Chevron 92 octane. I used to use Chevron 94 octane, but my car just seemed happier with the 92.

No Chevron out here in Ontario. Never tried it.

BTW, the test I refer to was conducted on Ontario refinaries.

so 19* would be safe with HIGH OCTANE?

Would it give a noticable difference like if you compared the following:

15* to 17*
15* to 19*
and
17*to 19*

how much, i guess "gain" would i get from this?

GRM did an article a while back about dicking with timing.

Like many things - more is not always better - and the limiting factor is not necessarily pre-detonation.

They tested their results on a dyno in order to find the optimum amount of advance - when they went over that level, peak HP fell off and both the HP and Torque curves became jittery - all w/o any pre-detonation.

I think that it's a matter of optimizing rather than maximizing - often 2 or 3 relatively useless peak hp can come at the expense of mid-range.

Robin

Originally posted by Cdn_sentra_se
so 19* would be safe with HIGH OCTANE?

Would it give a noticable difference like if you compared the following:

15* to 17*
15* to 19*
and
17*to 19*

how much, i guess "gain" would i get from this?

I don't think you'd feel much of a difference going from 15 to 17, but you'd feel it going from 15 to 19, or even 20 (I keep mine at 21 degrees).

This is probably a stupid question to ask but I'm gonna ask it anywayz, how do you check what the timing is set at? And how do advance the ignition timing?

Stupid questions, I know but I'm new and learnin' as I go :(

Thanx for any help

Check SE-R.net, they give you step by steps on how to do it.