Re: 2017 Winter Upgrade/Update thread |
Subject: Re: 2017 Winter Upgrade/Update thread by rklessdriver on 2017/9/16 12:38:53 Quote:
Matt, While I did have one issue year before last, where moisture and evaporated fuel messed up one of my carbs.... I actually figured out the problem that I was having, right before the last race of last season. Sucks because I chased it all season and learned almost nothing about tuning the car. Turned out to be a problem with the MSD distributor. The top plate for the advance had worked itself loose.... In a race car you remove the weights and springs, and use a little stud/nut to lock the advance out.... Well over time the vibration had loosened it up enough so that when I had the car on the 2 step it would back the timing up causing the car to stumble or backfire when I let go of the 2 step/trans brake.... or worse the car would leave on no power and then do a huge wheel stand the very next pass when I changed the tune up to compensate.... It was a seriously tough problem to find because it was so inconsistant. Sometimes the car would make a decent pass and then go to crap.... when I checked the timing it would be off in left field and othertimes it would actually move back to where I set it.... The plate was loose enough to move when up on the 2 step.... but it took alot of effort to move it by hand and even thou I checked by twisted on it and the rotor a few times I never felt it move until right before the last race. I tightened it up, reset the timing and it was a totally new car the last time I raced it. Will |