Well done, man.
I need to chew on the info a bit but your points about the ratios are spot on. That definitely makes sense and it’s making me wish I had the budget/time for the T56 swap already.
So this may be obvious to everyone but me but aside from the governor weight, what Needs to be done to hold off that shift for 400 more rpm? have you tried manually shifting it..... Aside from the Dart, I drive nothing but manuals...I always thought the biggest benefit for the slush pump was that you set it and forget it. :D When the 4.10s went in, the old governor shoulda been swapped out.
You can try adjusting the KD mech. But if it is already maxed out, you will need a different lighter flyweight. You can lathe some off the one you have or just order up one from a supplier, A&A I think has them.
Alternatively, you might get away with cranking up the line pressure a tad.
But 4.10s do normally require a different governor package. Arbitrarily messing with the line-pressure, with a maxed out KD mech, can introduce other driveability issues.
Well, traction isn’t that big of an impediment so far. Launching around 2500, it burns the tires for ~15 feet and hooks...I tried rolling into the throttle less abruptly to spin less and the times were significantly slower. So...compression test may be necessary? The motor doesn’t smoke so I’m hoping that the tuning may be more relevant.
If you can't sustain the spin, I would suspect the secondaries are not opening, or that 2600 is about to receive the heave-ho. But I would still do a compression test.
The loss of secondaries might be good for 10 hp at 2600
The TC could be 130 or more for a 3500 versus your 2600
The powerloss from poor compression is tricky to estimate, but could be more than 10, and waaaay less than 130,lol.
It should be obvious that the TC would be the biggest performance contributor........ on the start line.
Yeah the Mustang is a 3600lb landwhale but it has a motor that pulls from 2k straight through 7300, 285 wide W-rated tires and six gears. It’s not a fair fight. I opted for the 3.55s over the 3.73s because it would trap in 3rd rather than 4th. Just curious, do you know the ratios in that box?
Someday, it’ll make it to the drag strip. Lol Trust me, if Dodge offered a sub 4000lb muscle car that was smaller than a Country Squire I would have bought it.
