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anyone stroke a hemi crank. DELETED #869218 12/02/10 12:25 AM 12/02/10 12:25 AM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	Post deleted by johnzgarage

Re: anyone stroke a hemi crank. [Re: johnzgarage] #869219 12/02/10 12:43 AM 12/02/10 12:43 AM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	I doubt you will get that much out of it. If your lucky you might see .08"-.085" gain, but your also working with a damaged crank, so it could less than that. Your wanting to use the longer 7.1 rods in this engine also. This would require custom pistons. Your talking $300-$500 worth of machine work counting re balancing. In the end you still have a stock crank that has seen major abuse. Just to save a few hundred dollars. You can find cranks out there in the $500-$600 range if you shop around some. Those engines in my eyes are just to expensive to take chances on band-aid fixes. I have NOT had any problems with the cheaper off shore cranks, and I have run them all. Eagle,440 Source,RPM etc. They just need checked. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: anyone stroke a hemi crank. [Re: Bob_Coomer] #869220 12/02/10 12:57 AM 12/02/10 12:57 AM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	Ya, I know I can buy a good 4.15 crank.... just hate to not use it.

Re: anyone stroke a hemi crank. [Re: johnzgarage] #869221 12/02/10 01:01 AM 12/02/10 01:01 AM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	If your going to use it, have it welded up, I have some experience with welded up stock cranks. They can also be machined down getting rid of the undercut fillet next to the counter weights. [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: anyone stroke a hemi crank. [Re: Bob_Coomer] #869222 12/02/10 01:07 AM 12/02/10 01:07 AM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	I might just go with 4.15 crank and make a low deck crank out of the spun 3.75 8 bolt crank........

Re: anyone stroke a hemi crank. [Re: johnzgarage] #869223 12/02/10 11:26 AM 12/02/10 11:26 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	I would think it could be offset ground to 4.00 easy enough when going to a Chevy 2.2 rod.

Re: anyone stroke a hemi crank. [Re: Dodgem] #869224 12/02/10 11:49 AM 12/02/10 11:49 AM
Joined: Jan 2003 Posts: 75,060 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,060 U.S.S.A.	Quote: I would think it could be offset ground to 4.00 easy enough when going to a Chevy 2.2 rod. the Eagle crank I have fitted for a low deck started out as a .010 undersize on the rods and easily went out to 3.895 , used that stroke because of a miscommunication in piston CH.

Re: anyone stroke a hemi crank. [Re: Dodgem] #869225 12/02/10 12:27 PM 12/02/10 12:27 PM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	I dont think a 3.75 crank will stroke to 4.0. All the rod journals would have to be welded to go that far for a 2.2 chev rod........could be done , but why use a welded stroker crank ??? I think I might just turn the crank ( clean it up ) and sell it.

Re: anyone stroke a hemi crank. [Re: johnzgarage] #869226 12/02/10 12:54 PM 12/02/10 12:54 PM
Joined: Jan 2003 Posts: 9,876 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,876 Weddington, N.C.	Dan (Performance Only) took an MP 8 bolt Hemi/RB crank up from 4.15/2.375 to 4.30/2.200 for my 517 stroker, I'd highly recommend you contact him for his opinion. You can get 3.91 or 3.915 but really no bigger on a 2.200 journal....unless you weld it up and then you can go to at least 4.25" no problem. I had Paul Savadin (RIP) of Big Daddy fame weld me one up several years ago, said it was good for at least 700 or (to put it another way) stronger than the block it was going in. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: anyone stroke a hemi crank. [Re: Streetwize] #869227 12/02/10 02:12 PM 12/02/10 02:12 PM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	Im still thinking......maybe turn crank to 3.91 and use a light 6.8 chev rod with .990 pin and custom piston's . Might rev nice.

Re: anyone stroke a hemi crank. [Re: Streetwize] #869228 12/02/10 02:13 PM 12/02/10 02:13 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	well BB mopar is 2.375 journal and the Chevy is 2.20 so you have .175 to work with offset it .125 with 95% of the cut off the inside should be no problem .125 X 2 will increase the effective stroke .250 .250 + 3.750 = 4.00 I could see getting 4.050 stroke.

Re: anyone stroke a hemi crank. [Re: Dodgem] #869229 12/02/10 02:46 PM 12/02/10 02:46 PM
Joined: Jan 2003 Posts: 9,876 Weddington, N.C. Streetwize master
Streetwize master Joined: Jan 2003 Posts: 9,876 Weddington, N.C.	Dodgem, no not really because you have to work from the journal centerline so the net is 1/2...like the difference between using the diameter and the raduis. 2.375/2 = 1.1875 2.2/2 =1.1 "gross" difference is .0875" x 2 =.175", by the time you allow for clean-up you typically "net" =.075-ish x 2 = .15 added to the stroke. Last edited by Streetwize; 12/02/10 02:49 PM. WIZE World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker! https://www.youtube.com/watch?v=-mWzLma3YGI In Car: https://www.youtube.com/watch?v=PjXcf95e6v0

Re: anyone stroke a hemi crank. [Re: Streetwize] #869230 12/02/10 03:41 PM 12/02/10 03:41 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	Quote: Dodgem, no not really because you have to work from the journal centerline so the net is 1/2...like the difference between using the diameter and the raduis. 2.375/2 = 1.1875 2.2/2 =1.1 "gross" difference is .0875" x 2 =.175", by the time you allow for clean-up you typically "net" =.075-ish x 2 = .15 added to the stroke. Exactly Its not just simple math. Too many variables, and with the damaged journal and all. It be worth checking into, might be able to get a set of stroker pistons, and choose a rod length that will work out great. Its conman for hemi pistons to be down in the bore .050+ [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: anyone stroke a hemi crank. [Re: Bob_Coomer] #869231 12/02/10 03:46 PM 12/02/10 03:46 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	this is what I think 6333342-offsetgrind.gif (33 downloads) Last edited by Dodgem; 12/02/10 03:47 PM.

Re: anyone stroke a hemi crank. [Re: Dodgem] #869232 12/02/10 03:59 PM 12/02/10 03:59 PM
Joined: Jun 2006 Posts: 427 saint paul mn. J johnzgarage OP mopar
johnzgarage OP mopar J Joined: Jun 2006 Posts: 427 saint paul mn.	Or destroke the crank and use a 7.1 c to c chev 2.20 rod . Now that would be differnt. Some of the old pro stocks used short stroke cranks to spin some high 10g r's .

Re: anyone stroke a hemi crank. [Re: johnzgarage] #869233 12/02/10 04:09 PM 12/02/10 04:09 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Friend of mine has a 410 Cube hemi in his 69 Super bee was built for a SS/TA truck think they used a 3.50 stroke not sure how they got there.

Re: anyone stroke a hemi crank. [Re: Streetwize] #869234 12/02/10 05:04 PM 12/02/10 05:04 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	Quote: Dodgem, no not really because you have to work from the journal centerline so the net is 1/2...like the difference between using the diameter and the raduis. 2.375/2 = 1.1875 2.2/2 =1.1 "gross" difference is .0875" x 2 =.175", by the time you allow for clean-up you typically "net" =.075-ish x 2 = .15 added to the stroke. that's exactly right. we have one in the grinder right now going to 3.915 the only way to get that is to start with standard journals that are in good shape. anything less than that and you'd need to go .010 or more undersize on the journals. Wize, the guy that did that crank for you (Mark) works for me. i'm glad you liked it. machine shop owner and engine builder

Re: anyone stroke a hemi crank. [Re: Performance Only] #869235 12/02/10 05:52 PM 12/02/10 05:52 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Guess I had it wrong in my head. live and learn.

Re: anyone stroke a hemi crank. [Re: Dodgem] #869236 12/02/10 06:33 PM 12/02/10 06:33 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Quote: Guess I had it wrong in my head. live and learn. Just shows were only human @ the end of day , imagine being right all the time , although some guys on here are always right.

Re: anyone stroke a hemi crank. [Re: 602heavy] #869237 12/02/10 09:07 PM 12/02/10 09:07 PM
Joined: Jan 2008 Posts: 622 sing sing U unknown mopar
unknown mopar U Joined: Jan 2008 Posts: 622 sing sing	Well i can tell you for sure a stock hemi crank can be offset ground to a four inch stroke with out welding. I had one in my hemi years ago. The only catch is the journal size was 2.1 , the same size as chevy 400 small block. No need for stuff like that with all the cranks out there now.

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