Most of this build drives people crazy. I hear "why?" more times than I can count. And to answer that, because I want to. Plenty of things in the world to waste money on. Why not waste it on something that makes you "little-kid-at-Christmas" happy.I would be happy to help you out. I can help you on here, or over a phone call (or both).
Street Strip / Track Only?
Mostly Street with track use. 1/4 mile and 1/8th mile.
best estimates for finished weight with me in it is 3100#
Shooting for 1500 at 12# boost
460 based 638ci BBF
Roots 10-71 from TBS
Full Moly Tube Chassis. 4-link Rear.
Hoosier Quick Time Pro DOT 33x22.5x15 rears.
I don't type as easily as I used to before I went turtle, so bare with me.
Thank you so much for that detailed explanation. I'm up in the air on whether or not I need a 4 or 5 speed. 4 seems to be enough but I'm wondering if a 5 speed would be beneficial enough during Drag Week to take on the extra expense.Are you going to want a 4 speed or 5 speed?
I would say as a "street/strip" application you will want to be a little on the under geared side. If you were looking at this as 100% track... I would start about here.
4.30 rear gear, 2.50 - 2.60 low gear. Now clutch selection will play a roll, as you will need something capable of holding the power and weight, but able to slip or be tuned on the track. I have several customers similar to your application.
So... as far as finding a trans, if your looking for a 4 speed or 5 speed will determine what "gear sets" you want.
How a Lenco works is simple. You simply multiply the gear sets together to get 1st gear,
(Back Case) 1.184
(3rd Case) 1.256
(2nd Case) 1.280
(Front Case) 1.31
1.184 = 1.184 Fourth Gear
1.184 x 1.256 = 1.487 Third Gear
1.184 x 1.256 x 1.28 = 1.903 Second Gear
1.184 x 1.256 x 1.28 x 1.34 = 2.55 First Gear
They are generally marked as %. 1.184% for example.
With the Lenco, you can switch the order of the gear sets and change gear splits.
USING SAME GEAR SETS Changing 2nd gear ratio...
1.256 = 1.256 Fourth
1.256 x 1.184 = 1.487 Third
1.256 x 1.184 x 1.34 = 1.992 Second
1.256 x 1.184 x 1.34 x 1.28 = 2.55 First
I hope this helps...
Where is the Like or Thumbs up button? Thank you for being so detailed in that. I will be getting with you about the clutch situation as the build progresses.Correct, back case is by the reverser... I would want to talk to you about clutch as usage amount and some other things will play into your choice.
I think what I would actually shoot for in a 5 speed would be what is below for a CS1 as the options aren't as open as a CS2 or CS3
1.256, 1.577, 2.01, 2.584
Splits look a little better.
1.256, 1.720, 2.546
CS1 Gears 1"
1.25% - Uses 34 tooth planet gears, a 23 tooth sun gear and a 91 tooth ring gear.
1.28% - Uses 32 tooth planet gears, a 25 tooth sun gear and a 89 tooth ring gear.
1.31% - Uses 27 tooth planet gears, a 25 tooth sun gear and a 80 tooth ring gear.
1.34% - Uses 24 tooth planet gears, a 25 tooth sun gear and a 74 tooth ring gear.
1.37% - Uses 26 tooth planet gears, a 31 tooth sun gear and a 83 tooth ring gear.
1.41% - Uses 24 tooth planet gears, a 34 tooth sun gear and a 83 tooth ring gear.
1.44% - Uses 20 tooth planet gears, a 32 tooth sun gear and a 73 tooth ring gear.
1.44% - Uses 22 tooth planet gears, a 35 tooth sun gear and a 79 tooth ring gear.
1.46% - Uses 22 tooth planet gears, a 37 tooth sun gear and a 80 tooth ring gear.
1.48% - Uses 22 tooth planet gears, a 40 tooth sun gear and an 83 tooth ring gear.
1.50% - Uses 17 tooth planet gears, a 34 tooth sun gear and a 68 tooth ring gear.
1.56% - Uses 16 tooth planet gears, a 41 tooth sun gear and a 73 tooth ring gear.
1.68% - Uses 15 tooth planet gears, a 62 tooth sun gear and a 91 tooth ring gear.
If I was buying new I would. I would like to buy a used trans, i'd rather not waste their time unless I plan on spending some money with them. Sooner or later, I will spend money with Lenco.Just contact lenco, they are very willing to offer up ratio choices for certain applications. They have helped me immensely. Great people to work with.