Your donations help keep this valuable resource free and growing. Thank you.
|
Largest Billet crank |
Post Reply | Page 12> |
Author | |
Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1033 |
Post Options
Thanks(0)
Posted: Sep/19/2017 at 11:27pm |
What is the largest stroke that can be used in an Indy Block. I believe I have heard of 4.250. Correct me if I am wrong.
Thanks, Allan
|
|
69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
|
|
Lenni AMC
AMC Nut Joined: Jun/05/2011 Location: Iceland Status: Online Points: 420 |
Post Options
Thanks(0)
|
Longest stroke is 4.250"
|
|
AMC Gremlin w/401
6.212 @ 117.01 - 1/8 Mile 9.785 @ 133.11 - 1/4 Mile https://www.youtube.com/channel/UCikyNqrfpMB8VzLd910Hkhg https://rbjracing1.wixsite.com/website |
|
Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1033 |
Post Options
Thanks(0)
|
I wonder if there is a reason why not longer. Pan rail interference, cam interference? Aluminum rods vs steel rods when it comes to clearances of the cam and rails?
Just wonder if anyone has checked this out. Thanks Allan
|
|
69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
|
|
Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
Post Options
Thanks(0)
|
You run out of room, rod length becomes critical and the crank diameter will not support it. |
|
Gremlin Dreams
|
|
stickshifter
AMC Addicted Joined: Jan/17/2008 Location: Bed Rock Status: Offline Points: 573 |
Post Options
Thanks(0)
|
I run 4.150" with aluminum rods. I do not believe 4.250 would be easy to do unless using steel rods. Beyond that, the overall package is too small for anything longer.
|
|
7.03 @ 196 mph
|
|
Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1033 |
Post Options
Thanks(0)
|
Very Cool. Thanks for the response Kevin. That's the kinda info that I needed to know.
|
|
69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
|
|
DaemonForce
AMC Addicted Joined: Jul/05/2012 Location: Olympia, WA Status: Offline Points: 1070 |
Post Options
Thanks(0)
|
This is likely the most engineering safe combination in a 401 crankcase. I would not dare go further than the 4.150" unless a taller deck option were there. |
|
1971 Javelin SST
American 304 2v | FMX | AM20-3.31 1983 American Limited Jeep 4(.7)L S-MPFI | 1982 NWC T-5M (4.03/.76) | Dana30IFS/35-2.72 |
|
Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
Post Options
Thanks(0)
|
I do not believe that even with a taller deck you
can go much more. Even with steel rods Your outta room. Taller deck would help the rod ratio and ring package crunch. |
|
Gremlin Dreams
|
|
Aljav
AMC Addicted Joined: Jul/18/2007 Location: Wisconsin Status: Offline Points: 1033 |
Post Options
Thanks(0)
|
When dealing with Chevrolet Big Blocks you often hear that the limitations are the rails and the cam location, Thus Aftermarket Big Blocks with raised cam locations and grinding or even wider rails.
I know AMC Architecture falls between small and big block Dimensions, so the curiosity of limitations come into play. Helping my friend investigate possibilities before we persue this project. Like Wally Booth told me one time.. Build it bigger and Rev it higher!! Thanks. Allan
|
|
69 AMX 9.86 132 mph 71 JAV/AMX and 69 Javelin, .. NAMDRA member #1106
|
|
garland performce
AMC Apprentice Joined: Nov/19/2013 Location: sibley mo Status: Offline Points: 172 |
Post Options
Thanks(0)
|
My 4.00 stroke with steel rods has a lot of room
6.00 inch rods gave me a 1.240 comp height moved the ring pack down |
|
Post Reply | Page 12> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |