for anyone who is considering 4.10s
#22
Legacy TMS Member
Not to be **** but you're math is wrong; LBJay is right. We used to call percentage multiplication by 1 "easy math" because it saves the one step of figuring the multiple by subtracting the desired percentage from one. Instead of 322 X 1.15 it should be 322 / (1-.15) or 322/.85 which equals 378.8 at the crank. Either way, it is what it is........ good power numbers!
#23
Cobra R Member
Join Date: April 22, 2005
Location: Lost Angels
Posts: 1,898
Likes: 0
Received 0 Likes
on
0 Posts
this is one case where I wouldn't mind being wrong..
so can anyone give me a ballpark on my crank hp with my listed mods?
#26
Not to be **** but you're math is wrong; LBJay is right. We used to call percentage multiplication by 1 "easy math" because it saves the one step of figuring the multiple by subtracting the desired percentage from one. Instead of 322 X 1.15 it should be 322 / (1-.15) or 322/.85 which equals 378.8 at the crank. Either way, it is what it is........ good power numbers!
Tons of people get this wrong so don't sweat it if you make the mistake of multiplying by 1.xx where xx are the losses.
Plus, we don't know the losses to an exact percentage anyway unless you dyno the engine and then the car and figure out the loss this way. Its somewhere near 15% for manuals.
#27
Go with Ford Racing.
#31
I went with 3:73's,either way you get the benefit of some that torque from the engine.I wish I had gone with the 4:10's now but oh well,it is what it is.Maybe next year...
#34
Uh - that would be correct. 25% for C4's and AOD's...don't know about the math though...lol
#36
If you want to see the numbers for different gearing you can change the [3.55] [4.10] [4.30] to different numbers, although I'd keep the 3.55s there for comparison sake. In your case you can change the 3.55 to 3.31 and the 4.1 to 3.73 as that should be about what you're looking for. You can change tire size as well for those running 235/50-18s instead of the 235/55-17s. I also included the gearing ratios for the 3 transmissions and you can put those in under the "1st 2nd 3rd 4th 5th" line.
#37
Mach 1 Member
Join Date: July 8, 2005
Location: Northern BC, Canada
Posts: 525
Likes: 0
Received 0 Likes
on
0 Posts
might be a bit off topic, but does anyone know if going from stock gears to 4.10's actually make the car faster in the 1/8 mile, or 1/4 mile, or 0-60? My car sure feels like it has alot more pep now, but I wonder if it's actually much quicker? I don't race or drag race, so I don't really know.
#39
Legacy TMS Member
Well they don't seem to help my times on the factory Pirellis, being as I can't go WOT until after after getting into 3rd gear. Anymore than that, and I just spin thru 1st, 2nd, and into 3rd.
17" ET streets coming this spring....... YES!
17" ET streets coming this spring....... YES!