2056 Timing, Looking for Analysis Of New Timing Values Options

[Mblizzard]

I have converted my 2.0 to a 2056 and added Micro Squirt fuel injection.

Ever since I did the 2056 conversion I have seen higher than norm cylinder head temperatures. In fact I cracked a set of heads from getting them too hot.

I played around with the timing with in the suggested 2.0 limits of around 27 degrees. but was really never able to influence the CHTs that much with changes in the timing. Adding more fuel at the right times with the Micro Squirt certainly allowed me to control the CHT much better but I always felt it was still getting too high.

Then I ran across this.



This is certainly a lot more advance than I ever added to the engine. So based on that I revised my timing table to:



Just love how easy it is to make changes with Micro Squirt.

So I am looking to see what the thoughts are on 35 degrees of advance and what impacts it may have on CHT. I am going to load this and test tomorrow.

[JamesM]

This is the table I run on my 2056. It gives very snappy response and even on a hot Utah day the heads are usually under 350 deg. I setup a similar table with a slightly less aggressive ramp up before 3000 rpm (as its not my motor to blow up) on my buddies monster 2270 and it runs just as cool at the heads. Bottom line the majority of your driving time is going to be spent between 3000 and 5000 rpm and that range should always be 27-28 deg advance and somewhere in the 13s afr on cruise and 12 on load. If you are hitting those numbers and still running hot you probably need to look elsewhere to run cooler.