Lock the converter for less RPM at traps, or leave unlocked??
#1
Lock the converter for less RPM at traps, or leave unlocked??
So, I have been watching my videos of running Matt's Fairmont and I noticed that the converter was locking later in 3rd than anticipated. I also noticed that it drags the rpm level down to about 6,000 at the traps. Matt was going through higher, because he was spraying the car on most passes. He also thinks the motor makes peak power at roughly 6400 rpm. I figure if I don't lock the converter on the race tune, I could pull it higher into the powerband in 3rd. Or, do you think the direct drive of a locked converter is more beneficial? If that is the case, I would lock it as soon as I went into 3rd.
Ideas?
Mike
Ideas?
Mike
#4
TECH Apprentice
I lock the convertor, around 6100 rpm in third(about 112 mph), you don't want to lock it too soon, as said it won't make it quicker.
I had to experiment to get the right balance of drop in rpm,and loading.
#5
Ok, well the lockup drags the rpm down by 500. It is clearly seen on the tach during a pass. I was thinking of locking it at around 80, when it hits third. That would probably drag it down to 5200 or so. I was also thinking of upping the shift points from 6200-6400. Right now it is supposed to lock at 110, but does not lock until around 120. It seems to lock around the 1,000 foot mark. To me, that is not enough time in lockup. But, by the same token I don't want to lug it down too much.
#6
9 Second Club
iTrader: (34)
Ok, well the lockup drags the rpm down by 500. It is clearly seen on the tach during a pass. I was thinking of locking it at around 80, when it hits third. That would probably drag it down to 5200 or so. I was also thinking of upping the shift points from 6200-6400. Right now it is supposed to lock at 110, but does not lock until around 120. It seems to lock around the 1,000 foot mark. To me, that is not enough time in lockup. But, by the same token I don't want to lug it down too much.
#7
Mike