help with Hemi crank measurement.. - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech help with Hemi crank measurement..

Print Thread

Page 1 of 2

1

2

help with Hemi crank measurement.. #976730 04/20/11 03:53 AM 04/20/11 03:53 AM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	I'm about ready to order my crank from Crower (having figured out the final weights, etc., with the help of everyone here. Thanks! ) Does anyone have the measurement from the crankshaft-flywheel mating flange surface - to - the rear block surface that the bellhousing bolts to? Also, if anyone has the thickness of the crank flange that may be useful to have in considering my measurements. Assume it's a standard style 8-bolt 426 Hemi crank. I have to order the crank drilled for a manual trans pilot (I have a T56), so I need to triple check the measurements as I don't have a crank to work with. I also have to consider the clutch dimensions so best if I can get as many measurements as I can now. Any help greatly appreciated. If you come up with different measurements it will just help me get an idea of contingency I have to build in to the depth of the drilling. Trans shaft extends 0.850 in from block/bell mating surface at present. cheers -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976731 04/20/11 05:29 AM 04/20/11 05:29 AM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	you will find that area having a standard measurement .I am sure that Crower has the on hand. what they would need to know otherwise would be when the crank is used for applications in custom where special multi disc clutches used in fuel cars. home of the Sox and Martin Hemi Duster

Re: help with Hemi crank measurement.. [Re: HEMIFRED] #976732 04/20/11 05:31 PM 04/20/11 05:31 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	thanks Fred it'd would still be good to know the measurement if anyone has it handy, for my own piece of mind when ordering and cross-checking with crower. I don't have a reference crank unfortunately. * measurement from the crankshaft-flywheel mating flange surface - to - the rear block surface that the bellhousing bolts to. help greatly appreciated -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976733 04/20/11 06:24 PM 04/20/11 06:24 PM
Joined: Jan 2010 Posts: 588 Franklin, TN 23T Hemmee mopar
23T Hemmee mopar Joined: Jan 2010 Posts: 588 Franklin, TN	Darren, Not sure I can get that exact measurement with the engine in the car, may have to add/subtract distance from motor plate to flexplate and then add/subtract thickness of plate. I have my spare Crower 4.625" crank here at the office, but nothing to measure with right now, will bring calipers in tomorrow and get you whatever I can off of it, should be similar. Which crank did you decide on? Ronny 6.789 @ 198.63 .956 Brand New 60'* 4.17@ 169 1/8th mile John 14:6 https://www.youtube.com/watch?v=TUku_hjYRh8

Re: help with Hemi crank measurement.. [Re: 23T Hemmee] #976734 04/20/11 07:21 PM 04/20/11 07:21 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	Hi Ronny, thanks it'd be great if you could.. no rush.easter break this weekend & we're heading away,so next week is ok. Decided on the billet crank EN30B knife edged. May be overkill (but way better than underkill). I posted a reply to the last post with the crower feedback included (sorry it took a while). They more-or-less reckon the forged would be alright for my app, but i'll play it safe as I don't want to tear the motor down that frequently to check. Thanks to your advice/help- I looked further and the Lightweight & Ultralightweight probably wouldn't work as you pointed out. Reasons being not so much the strength of the crank -considering a blower would be driven off the front it'd still be more than strong enough - but more to do with the steel rods & bobweight - it seems, depending on my final piston weights (which I don't know yet) that the bobweight could be in excess of 2,300-2,400 so the crank would need weight added negating the whole point/cost of a lightweight assembly anyway. That's where I got to so I'll stick with a high grade/quality billet and hope it'll last forever. appreciate your help. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976735 04/20/11 09:06 PM 04/20/11 09:06 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: thanks Fred it'd would still be good to know the measurement if anyone has it handy, for my own piece of mind when ordering and cross-checking with crower. I don't have a reference crank unfortunately. * measurement from the crankshaft-flywheel mating flange surface - to - the rear block surface that the bellhousing bolts to. help greatly appreciated I am 100% sure that every crank company has the factory measurements on hand.They have to or there would be no way to fill an order.you could easily ask one or more what they have so you can learn what you seek from them. home of the Sox and Martin Hemi Duster

Re: help with Hemi crank measurement.. [Re: HEMIFRED] #976736 04/21/11 06:01 PM 04/21/11 06:01 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	thanks Fred i have checked with crower they only have the rear thrust face to flywheel flange face measurement. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976737 04/22/11 02:40 PM 04/22/11 02:40 PM
Joined: Jan 2003 Posts: 25,885 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,885 Rio Linda, CA	The measurement from the Hemi flywheel mating flange surface to the rear block surface will be the same as any '62-later Wedge or LA SB. The INTERNET, the MISinformation superhighway

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976738 04/22/11 05:14 PM 04/22/11 05:14 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: thanks Fred i have checked with crower they only have the rear thrust face to flywheel flange face measurement. so what would any more info be used to do ? home of the Sox and Martin Hemi Duster

Re: help with Hemi crank measurement.. [Re: HEMIFRED] #976739 04/22/11 07:17 PM 04/22/11 07:17 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	I'm running a T56 Magnum transmission, which has a non-mopar input shaft diameter & depth. I don't have a crank to baseline the measurements off. I was hoping someone would have a RB/Hemi where they could take a quick measurement so I can calculate the actual depth (from that surface) that I need to have the crank drilled to for the input shaft. I don't want the input shaft to interfere with the crank when it's all bolted up. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976740 04/22/11 07:26 PM 04/22/11 07:26 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	Fred, the only reference measurements I can take is from the rear engine/bell mating surface -where the transmission input shaft extends 0.850in. forward of this surface. This is only a block based measurement & I need a crank based measurement to spec/order the crank. the best measurement for me will be the flywheel flange to block/bell surface. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976741 04/23/11 10:57 AM 04/23/11 10:57 AM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	I don't know how accurate this is, but this is what I can measure on my spare engine. I don't know if I would use this for manufacturing, but only for comparison to what a crank manufacturer has on file. 6598682-Crank_to_block_440Source.jpg (59 downloads)

Re: help with Hemi crank measurement.. [Re: 440Jim] #976742 04/23/11 07:34 PM 04/23/11 07:34 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	Quote: I don't know how accurate this is, but this is what I can measure on my spare engine. I don't know if I would use this for manufacturing, but only for comparison to what a crank manufacturer has on file. Thank you !!! perfect. I can cross check it against other dimensions to arrive at a safe measurement. If anyone else has a measurement too it'd be greatly appreciated! -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976743 04/23/11 08:33 PM 04/23/11 08:33 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: I'm running a T56 Magnum transmission, which has a non-mopar input shaft diameter & depth. I don't have a crank to baseline the measurements off. I was hoping someone would have a RB/Hemi where they could take a quick measurement so I can calculate the actual depth (from that surface) that I need to have the crank drilled to for the input shaft. I don't want the input shaft to interfere with the crank when it's all bolted up. OK it's easier to understand now. If I were doing the same swap it would be treated exactly like when the Chevy pro stock boys like Jenkins used an 833 hemi box behind a big block. They did not change a thing on the cranks .What was done is to shortened the tip of the input shaft in order to make it fit.Plus used a bushing to marry the two parts. Inside the T56 outside Mopar. There's no way I would drill any deeper than required to use a Mopar transmission. Do you klnow how much longer the T-56 is than an 833 tip ? I saw where different applications of a T-56 used different lengths home of the Sox and Martin Hemi Duster

Re: help with Hemi crank measurement.. [Re: HEMIFRED] #976744 04/24/11 07:51 AM 04/24/11 07:51 AM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	Quote: ... There's no way I would drill any deeper than required to use a Mopar transmission. Do you klnow how much longer the T-56 is than an 833 tip ? I saw where different applications of a T-56 used different lengths Thanks again Fred. I actually don't know. It could very well be that the depth is no different at all, but I needed the measurement to check as I have to be sure. The T56 input shaft is .850in forward of the engine-block-bell-face. I'd need a manual trans original Hemi crank to compare apples to apples which I don't have. I have a feeling it may be .150 deeper but at this stage it's just a hunch. I really don't want to modify the trans input shaft in anyway. I also have to get the diameter right to use an appropriate bearing. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: 440Jim] #976745 04/25/11 12:01 PM 04/25/11 12:01 PM
Joined: Jan 2003 Posts: 16,928 NC 440Jim I Live Here
440Jim I Live Here Joined: Jan 2003 Posts: 16,928 NC	It would be nice if a couple other people could check this measurement for comparison. Crank variation, block variation, bearings, etc. Quote: I don't know how accurate this is, but this is what I can measure on my spare engine. I don't know if I would use this for manufacturing, but only for comparison to what a crank manufacturer has on file.

Re: help with Hemi crank measurement.. [Re: 440Jim] #976746 04/30/11 08:32 PM 04/30/11 08:32 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	hi does anyone else have a comparable measurement ..? help appreciated. -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976747 04/30/11 08:49 PM 04/30/11 08:49 PM
Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi rowin4 master
rowin4 master Joined: Jun 2005 Posts: 6,257 gulfport, ms, west mi	The cost of a new input shaft I would think would be cheeper than modifying the crank pilot depth and bushing/ bearing. Liberty Gears made a 23 spline input shaft out of M300 for $160. bucks for my Doug Nash transmission. it's ok to butt heads, just don't do it with a butthead

Re: help with Hemi crank measurement.. [Re: rowin4] #976748 04/30/11 08:52 PM 04/30/11 08:52 PM
Joined: Jun 2009 Posts: 1,212 QLD Australia Keith Black® OP pro stock
Keith Black® OP pro stock Joined: Jun 2009 Posts: 1,212 QLD Australia	the crank has to be made anyway (billet), so I may as well get the spec right to begin. I don't want to mess with the T56 as it is. It may well be that the crank doesn't need drilling any deeper than std, i just need reference measurements. thanks -------------------------------- Darren Beale Keith Black Racing Engines®

Re: help with Hemi crank measurement.. [Re: Keith Black®] #976749 04/30/11 09:28 PM 04/30/11 09:28 PM
Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY HEMIFRED master
HEMIFRED master Joined: Jul 2010 Posts: 3,502 SOUTH JERSEY	Quote: the crank has to be made anyway (billet), so I may as well get the spec right to begin. I don't want to mess with the T56 as it is. It may well be that the crank doesn't need drilling any deeper than std, i just need reference measurements. thanks Why you want to alter the crank in any way is beyond me. if in the future for some unknown reason the T-56 doesn't work out and you need to change to another trans then what? or maybe you try to sell it or decide to build with major power .then what? Quote: thanks Fred it'd would still be good to know the measurement if anyone has it handy, for my own piece of mind when ordering and cross-checking with crower. I don't have a reference crank unfortunately. Why you even would consider usiong or even for reference any specs posted here puzzles me immensley. No disrepect to fellow board memebers. You have more faith than I in them being used for my motor. . If you supply the specs and they have even the slightest difference than Crower uses then not only is something wrong with your numbers but you eat the crank should it not fit. home of the Sox and Martin Hemi Duster

Page 1 of 2

1

2

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1