I was thinking along the lines of frictional losses because there is more mass to turn with the overdrive unit.. Just like a 904 is faster than the 727 because there’s less mass to turn. But I could be wrongI do not;
but since you are already on page 9, at this moment,
I just want to ask this;
you know an A518 is just a 727 with an od box added,right? Ima guessing the OD only weighs 20/25 pounds or so.
But I also don't know how much power you can fire into the loc-up convertor.
But
You can run just about any rear gear that you have a mind to, and if you are able to take advantage of that, you may actually pick-up performance.
same ratios. That’s the Way I am thinking about it. that it’s just more mass to turn.I thought I read somewhere a 518 has more loss because, of course, of the od unit. But aren't they different ratios as well? Don't remember offhand
More stuff in the transmission to turn. More mass. Like going from a 904 to 727. But I’m just speculatingWhy do u think ur car will slow down? Kim
I was thinking along the lines of frictional losses because there is more mass to turn with the overdrive unit.. Just like a 904 is faster than the 727 because there’s less mass to turn. But I could be wrong
Same. Something like 2.45, 1.45, 1, .69The real question might be- are the first and second gear ratios the same?
My one buddy will only run a 3 clutch front drum with 3 regular clutches behind his low 11 second duster. Says it’s over a tenth faster. Less rotating weight. KimI was thinking along the lines of frictional losses because there is more mass to turn with the overdrive unit.. Just like a 904 is faster than the 727 because there’s less mass to turn. But I could be wrong
Same pump but pumps more to feed od.
Right?
Eats more power
Hope you’re rightSplittin hairs.
Hope you’re right
That’s kind of the direction I’m looking at. I could probably lighten some of the stuff in the transmission and make up any loss there would be if there is any. I’m never going to drive this thing 1500miles in one trip. I always like the lower gears definitely helps the acceleration. Looking for the overdrive to basically calm down a borderline streetcarDoes it matter ? If your car is a dedicated race car there is no need for the OD.
if its a street car that gets raced occasionally its worth the small performance loss . You might actually pickup speed because you can now run 3.91s or 4.10s instead of 3.21/2.76s
i’m just about 100% sure I’m going to do it. I’m going to pick some brains at the Mopar weekend coming up and the Mopar nationals. So unless somebody give me a good reason not to I’m going toI'd make the swap and not even think about it. Any loss will be WALL worth the effort. It's not gonna make a slug out of it and it may even pick up some. You won't know until you do it.
Does it matter ? If your car is a dedicated race car there is no need for the OD.
if its a street car that gets raced occasionally its worth the small performance loss . You might actually pickup speed because you can now run 3.91s or 4.10s instead of 3.21/2.76s
Separate the two. No one is arguing whether the parasitic loss is compensated with increased mpg of OD/lower from cruise. Loss is loss. He asked. Could be 20hp @6000 and only 2hp at 2000.I'd make the swap and not even think about it. Any loss will be WELL worth the effort. It's not gonna make a slug out of it and it may even pick up some. You won't know until you do it.
Separate the two. No one is arguing whether the parasitic loss is compensated with increased mpg of OD/lower from cruise. Loss is loss. He asked. Could be 20hp @6000 and only 2hp at 2000.
I think its talked about on mofarts, like 15 yrs or more ago. If it were a major deal it would be often reiterated, but it's small and no one cares.
Now that's where you trip over yourself...Exactly my point. It's not worth writin a book about, AJ Jr.