My 440 needs help!
01-05-2009, 02:12 PM
#1
Guest
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My 440 needs help!
I have a 67 Dodge Coronet R/T with a 440 and 727 tranny. I rebuilt the motor about 6 months ago and the car has about 900 miles on it. I didnt go crazy with it, it has a mopar 284/484 purple shaft cam with stock heads and a .30 over bore. I have an Edelbrock Performer intake and a Holley 770 cfm carb. It also has 3.91 gears in it. My problem is that I think that I have the wrong torque converter in the car, it has 2400 stall but I forgot what brand it is. There are times that when I give it about 3/4 throttle it will just boil the tires and then other times it will just down shift and sort of bog down and slowly get up and go. This same thing happens when I give it full throttle. I have one of those cable kickdown linkage systems from Mancinni on it that is supposed to auto adjust when you give it wide open throttle so I dont think that it is the kickdown linkage being adjusted improperly. I just dont know what would make it act SOO differently at times. Any help or advice would really be appreciated.
01-06-2009, 01:55 AM
#2
Mopar Lover
Sounds like a function of the timing and secondaries on the carb kicking in... just a few hundred rpm could make that difference, or a little faster slamming the pedal open.
01-06-2009, 02:14 AM
#3
Admin
stock torque convertors have a stall seed of about 500 to 700 RPM, I'm pretty sure. I propbably would have gone with a stall convertor more around 1800 to 2000 RPM but like Buck said, it sounds more like a timing and carb issue to me. I would play around with the timing a little bit and go from there. If you can play with the secondaries, do that as well, but only after you are 100% sure the timing is DOBA.
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