Manual trans swaps: Cheapest vs Easiest vs Best Performing vs Best Driving Experience
Anyway- your opinions are welcome.
IMO,on the street, it's hard to beat an automatic with a high stall and a lock up, and geared to put second gear where you want it.
If you study this out, it actually performs like a 4.5 speed, with a "deep-low" being inside the TC; and the lock-up is a half-gear.
Let's say;
your TC has a deep low ratio of 1.8 and a minimum of 1.1, just saying,
this is a split of 1.1/1.8=.61 ; That's a heck of a deal.
Let's say you had an A999 with a loc-up and ratios of
2.74-1.54-1.00. And let's say 3.55s were your rear gear of choice, and had 27" tires. Then your ratios to the rear axle would be
9.73-5.47-3.55 ; Now let's add the TC into the mix. I will add 1.8 for Zero mph, and 1.1 for the rest, then add the loc-up so first gear looks like;
17.51 at zero mph, diminishing to 10.70,
and the others; 6.01- 3.91,
and the loc-up of; 3.55,
so stringing them together we get
17.51-10.70-6.01-3.91-3.55 with splits of.
.61-.56-.65-.91
On the street; 2nd will get you 68mph @5000@8% slip,
At the track; direct will get you 105@ 5000@ 8% slip
and loc-up is 65=2870
Those are some nice numbers. Compare them to the Standard A833. The ratios are
2.66-1.92-1.40-1.00, and splits of
.72-.73-.72
again with 3.55s to the rear axle;
.......(nothing going on here).......
9.44-6.82-4.97-3.55
compared to the A999....
17.51-10.70-6.01-3.91-3.55
What does it all mean?
If you can make the automatic hook at those number, it will blow the 4 gear away, until he hits 3rd gear. Then he will start to reel you in. Will he catch you? IDK; but it's third gear, and going back to my first statement;
"IMO,on the street, it's hard to beat an automatic".
With street in mind then,
lets put top of second gear at 60 mph.
for the A999, I get 4.10s=5080@8% slip. the new ratios are;
20.22-12.36-6.95-4.51-4.10
And for the A833, I get 3.55s=5085, and the new ratios are ;
........... 9.55-6.82-4.97-3.55.. compared to
20.22-12.36-6.95-4.51-4.10
Suddenly the A999 has three ratios to top of second@60, versus just two for the A833.
Yeah, I know, cruising 65=3313@zero slip with 4.10s will suck; the A999 needs an overdrive.
Do you need 20.22 for to take off with? Maybe if you had a slanty,lol. What this really means is that you cannot floor it in first gear @ zero mph, without tirespin.lol.
I just wanted to give you some food for thought.
I know whatchurthinking,lol. What if you just first gear all the way to 60 topping at ~5080 as before.
Can't be done with a 2.74 low gear.
With a 2.74x2.76 rear gears 60=6100@8% slip.
With a 2.45x2.76, however 60=5440@8%slip
So with a 998Loc-up and 2.76s your new numbers are
12.17 >7.44,1st-4.40,2nd---3.04--2.76 A998
..........8.59-6.20-4.52 3rd-3.23 Standard A833
.....9.98-----6.20-4.52 3rd-3.23 Commando A833
12.13-8.86-6.38-4.56 4th ............Standard A833
Now we're talking!
BTW,
I have run that Commando/3.23 and I really really liked it.
I switched to 3.55s when I installed the GVod. Now I hit 60 in first over at 6380; zoom-zoom, and 93 in second over @6140 heehee.
