I've heard people say as long as your Eprom timing is correct you don't need to adjust the disturbutor much.. Let me tell you, I had my Distubutor timing at -4 and my ePROM timing at +6 and it run like a crap. I did not know this until I deside checked it this past weekend. The disturbutor it must have move on me over the past year or so.... Was wondering if anyone could help me understand the best method of adjusting timing. What i did was I have my disturbutor manually turned to +10 Degress and my EPROM base timing to +10 dregess. My question is what is the correct method to adjust timing. What are the cause and effect of setting up timing like this VS setting up the distubutor to +6 Degress ( stock) and my Eprom base timing +10 degress ( 4 degress past stock)? My goal is to advance timing before knock. how are you all setup??

I've finally replaced all the parts causing my poor preformance and now i'm ready to adjust my chip again. So i've got all my tools this time i'm able to datelog, so i'm ready to nail down the tune.

Another question, how many people have ported there base, pleuim, runners and air box to free up air and found that there bottom end is not as agressive anymore. I used to be able to smoke tires just stompping it at a dead stop. Well this past weekend it was not the case, it moves but it will not smoke tire unless i hit it side ways. I mean it could have been 90+ degree heat will and the tires gripping into the hot pavment. It does pull hard in the upper rpm range then it use too.

 

Ideally you would want your base timing with the EST disconnected and your reference timing within the ecm to be the same value.

Anything else and you wind up with an offset between the ecm calculated advance and the real advance, which will soon become confusing, especially when scanning.

Set both to a convenient value that will allow the car to run well with the EST disconnected and that will orient the distributor in a position that is easy to identify, so that you can easily visually verify if it has slipped.

6 degrees should put the distributor pretty square to the engine, if the distributor is in the right position and should also allow the engine to run ok with the EST unplugged. Of course, use a timing light to verify.

If you have a bigger cam and need more advance to get it to idle, or have the distributor rotated at some strange angle, adjust them both to the same value that you can achieve both goals.

 

Well it doesn't answer my question, my main concern is, there are two differnet places to change timing, one on the disturbutor and the other in the chip... Do you make them match??? For example like 8 degress at the dissy and 8 in the chip instead of 6 and 6degres

 

Sorry we must have reply at the same time. Ok that makes sence so I'm going to match them up maybe bring it down to 8Degres on the dissy and 8 on the chip then datalog it... thanks man

Anyone out here have a good bin file for a pretty stock 88 vette. Something i can stare and compare?

 

if i make changes to the spark table am i going to have to adjust my dissy?

do you recommend that i set my dissy timing at +6* and my EPROM base timing +6*. And just add + a couple degres of timing to my spark table if needed?? rather then mes with the dissy and the base timing. is that how you all do it.

I really need to make sure i'm doing stuff right.