Hello all. I'm glad to join. I have lots of questions...hopefully not all stupid.
My first question involves the torque converter. I need one. I have yet to order a torque converter or rear gears for my project. I used the search tool to look thru the forums to see if anyone had asked my particular questions to no avail. So here goes.
I know there is a direct relationship between the cam and the converter, so I'll try to provide as many details as possible.
My build is a Spirit Cars '23 t-bucket
Turbo 400 tranny
Olds 400 big block bored .125 over to a 427 (4.0"bore x 4.25"stroke)
Compression 10.25:1
Edelbrock heads: heart shaped chambers, 2.072" intake/1.68" exhaust valve sizes
Offenhauser dual quad tunnel ram with a pair of Holley 4160 600cfm carbs.
Cam specs: Crower flat tappet .464/.485 lift 108lsa with 228 intake/238 exhaust durations. Powerband begins at 2500rpm.
Rear tires are Mickey Thompson 29"x18".
I have yet to determine a rear gear ratio.
Does anyone have any advice or recommendation for a torque converter? When I called different manufacturers such as TCI and B&M they recommend similiar 2200-2600 converters. However, when I called Boss Hog I actually ended up talking to the owner of the company. He gave me a recommendation (Boss Hog Bandit 47015) after asking lots of detailed questions that the others didn't ask, but more importantly he recommended going down a rear gear size for every 1.5 inches of tire diameter over 26". So in my case with my setup a 29" tire at 60mph would get me 2579rpm with a 3.71 rear gear. Keep in mind that my powerband begins at 2500rpm. So he recommended dropping two gear sizes going from a 3.73 or 3.9x to a 3.4x-3.5x rear gear. But with those ratios the rpms are slighly below my powerband. Can anyone validate or refute this info?
A proven converter/rear gear ratio with a similiar setup would be a big help.
Also, would anyone care to venture a guess about the weight of the vehicle?
Thanks in advance.
-Daniel
My first question involves the torque converter. I need one. I have yet to order a torque converter or rear gears for my project. I used the search tool to look thru the forums to see if anyone had asked my particular questions to no avail. So here goes.
I know there is a direct relationship between the cam and the converter, so I'll try to provide as many details as possible.
My build is a Spirit Cars '23 t-bucket
Turbo 400 tranny
Olds 400 big block bored .125 over to a 427 (4.0"bore x 4.25"stroke)
Compression 10.25:1
Edelbrock heads: heart shaped chambers, 2.072" intake/1.68" exhaust valve sizes
Offenhauser dual quad tunnel ram with a pair of Holley 4160 600cfm carbs.
Cam specs: Crower flat tappet .464/.485 lift 108lsa with 228 intake/238 exhaust durations. Powerband begins at 2500rpm.
Rear tires are Mickey Thompson 29"x18".
I have yet to determine a rear gear ratio.
Does anyone have any advice or recommendation for a torque converter? When I called different manufacturers such as TCI and B&M they recommend similiar 2200-2600 converters. However, when I called Boss Hog I actually ended up talking to the owner of the company. He gave me a recommendation (Boss Hog Bandit 47015) after asking lots of detailed questions that the others didn't ask, but more importantly he recommended going down a rear gear size for every 1.5 inches of tire diameter over 26". So in my case with my setup a 29" tire at 60mph would get me 2579rpm with a 3.71 rear gear. Keep in mind that my powerband begins at 2500rpm. So he recommended dropping two gear sizes going from a 3.73 or 3.9x to a 3.4x-3.5x rear gear. But with those ratios the rpms are slighly below my powerband. Can anyone validate or refute this info?
A proven converter/rear gear ratio with a similiar setup would be a big help.
Also, would anyone care to venture a guess about the weight of the vehicle?
Thanks in advance.
-Daniel