timming

[slyfox]

Hi, I own a 76 Cordoba with a 400, without the lean burn system on it, I installed a Edelbrock 4 barrel intake, edelbrock 600 cfm carb., dual exhaught, with Hemi mufflers only, what's degree should the timming be set on it, Thanks

[myk]

Whatever the engine likes.  Your engine is far from stock, so any factory based recommendations on timing are worthless.  Do you have a timing light and/or a vacuum gauge?  The idea is to get the most vacuum at idle as you adjust the timing, while simultaneously listening to how your engine is responding to your manipulations.

Personally, I have 20* of initial, with 36* total @ 2500 RPM....

[slyfox]

Thanks for the info. Good starting point.

[slyfox]

I'm using regular gas in it, 87 octane, I would like to know if 91 octane would make a difference in performance, since it a low compression engine, I know that 87 octane as 15% ethonal in it, I heard that 91 octane doesn't and that ethonal is not good for fuel systems. thanks  Sly