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4.25 stroke small block. Experience? #2712232 11/02/19 09:28 PM 11/02/19 09:28 PM
Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place C cudadoug OP master
cudadoug OP master C Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place	Anyone have the good, bad or ugly with a 4.25” crank in a small block?? Seems like ALOT of crank in a small space. Any excessive side loading anyone have an opinion on? Bloomer, you out there somewhere??? Thanks in advance.

Re: 4.25 stroke small block. Experience? [Re: cudadoug] #2712275 11/02/19 11:03 PM 11/02/19 11:03 PM
Joined: May 2003 Posts: 13,189 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,189 aZLiViN	Moparbilly’s IMM built small block mill was a 4.25 piece. Couple of drag weeks, nos assisted quarter passes, drove it around metro Phoenix... pretty stout well thought out combo. *my bad.... I believe that was a 4.125 stroke in moparbilly’s Last edited by J_BODY; 11/02/19 11:55 PM.

Re: 4.25 stroke small block. Experience? [Re: cudadoug] #2712283 11/02/19 11:38 PM 11/02/19 11:38 PM
Joined: Jan 2003 Posts: 31,030 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,030 Oregon	I did a 427 inch SB once using a 4.125 crank with small journal chevy rods. Things were very close. The windage tray had to be modified, we tried several different oil pickup tubes before finding one that worked, etc. Hughes might still sell their stroker kit with the 4.180 stroke and Honda journals. That combo might clear things a little better. I'm not so sure I'd try the 4.250 combo unless I had a lot of time and patience.

Re: 4.25 stroke small block. Experience? [Re: AndyF] #2712284 11/02/19 11:41 PM 11/02/19 11:41 PM
Joined: Jan 2003 Posts: 9,997 Frostbitefalls MN (Rocky&Bullw... gregsdart master
gregsdart master Joined: Jan 2003 Posts: 9,997 Frostbitefalls MN (Rocky&Bullw...	Was it Ron Silva that built a 501 cube smallblock, posted here? Google Silvaliant Last edited by gregsdart; 11/02/19 11:44 PM. 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

Re: 4.25 stroke small block. Experience? [Re: gregsdart] #2712450 11/03/19 03:14 PM 11/03/19 03:14 PM
Joined: Dec 2003 Posts: 22,696 Bitopia J jcc If you can't dazzle em with diamonds..
jcc If you can't dazzle em with diamonds.. J Joined: Dec 2003 Posts: 22,696 Bitopia	I got 2 4.25"/2.0" cranks, a 340 & 360. the 340 is supposed to be in a deep skirt A8 alum dry sump block. As we all know, both Rome and A8's aren't built in a day. Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.

Re: 4.25 stroke small block. Experience? [Re: jcc] #2712502 11/03/19 06:21 PM 11/03/19 06:21 PM
Joined: Mar 2003 Posts: 1,632 Lubbock,TX D DavidDean top fuel
DavidDean top fuel D Joined: Mar 2003 Posts: 1,632 Lubbock,TX	I use a Rod Bloomer 4.250 crank in my old x block. Its worked well. I dont use a standard style pick up.Thats where a big problem is. I have a Kevco pan with arear pick up.It cleared everything with minimal work. On my Molnar 4.125 crank it helped to cut the front and rear counter weight about .300. Using comp star rods and JE pistons it balanced very easy. The 4.250 x 4.125 x block has been 5.66 at about 121. I dont spin it very high, I shiift it about 65-6600 If this web site werent so difficult some older members might stop in more often. I havent been here in quite some time.

Re: 4.25 stroke small block. Experience? [Re: DavidDean] #2712666 11/04/19 12:57 PM 11/04/19 12:57 PM
Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place C cudadoug OP master
cudadoug OP master C Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place	Thanks all! I have access to a 4.25" crank motor, in an R3 block (with the Bloomer kit) and by biggest concern was excess side loading of the cylinder walls. So I text Bloomer Saturday and he responds. Not only did he respond, but he was on a break during a bow hunting trip. Now, THAT is service after the sale!

Re: 4.25 stroke small block. Experience? [Re: cudadoug] #2712683 11/04/19 01:44 PM 11/04/19 01:44 PM
Joined: Dec 2018 Posts: 53 Northern Bavaria / Germany MichaelF member
MichaelF member Joined: Dec 2018 Posts: 53 Northern Bavaria / Germany	you mind sharing what he had to say? interested in this stuff also....Thanks! Michael

Re: 4.25 stroke small block. Experience? [Re: J_BODY] #2712711 11/04/19 03:20 PM 11/04/19 03:20 PM
Joined: Jan 2003 Posts: 2,077 Oklahoma City Jwilli500 top fuel
Jwilli500 top fuel Joined: Jan 2003 Posts: 2,077 Oklahoma City	You're right Billy's was a 4.125 stroke. I still have a copy of the receipt with the specs that Billy posted on here once. I believe Streetwise did a 4.25 stroke on the relatively cheap though. Originally Posted by J_BODY Moparbilly’s IMM built small block mill was a 4.25 piece. Couple of drag weeks, nos assisted quarter passes, drove it around metro Phoenix... pretty stout well thought out combo. *my bad.... I believe that was a 4.125 stroke in moparbilly’s Last edited by Jwilli500; 11/04/19 03:20 PM.

Re: 4.25 stroke small block. Experience? [Re: MichaelF] #2712982 11/05/19 12:23 PM 11/05/19 12:23 PM
Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place C cudadoug OP master
cudadoug OP master C Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place	Originally Posted by MichaelF you mind sharing what he had to say? interested in this stuff also....Thanks! Michael Just that in a nutshell, the excess side loading deal is all talk. His piston called for a .003 piston to wall clearance to minimize piston rock to further help the situation. He claims many 4.25" crank combos in service with thousands of runs/miles, with no issues that he has been aware of. I must say again, Bloomer was great about my questions. We left our conversation with him wishing me luck if I bought this motor and if I had any more questions to reach out to him. Class guy! .

Re: 4.25 stroke small block. Experience? [Re: DavidDean] #2712985 11/05/19 12:26 PM 11/05/19 12:26 PM
Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place C cudadoug OP master
cudadoug OP master C Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place	Originally Posted by DavidDean I use a Rod Bloomer 4.250 crank in my old x block. Its worked well. I dont use a standard style pick up.Thats where a big problem is. I have a Kevco pan with arear pick up.It cleared everything with minimal work. On my Molnar 4.125 crank it helped to cut the front and rear counter weight about .300. Using comp star rods and JE pistons it balanced very easy. The 4.250 x 4.125 x block has been 5.66 at about 121. I dont spin it very high, I shiift it about 65-6600 If this web site werent so difficult some older members might stop in more often. I havent been here in quite some time. has been 5.66 at about 121.

Re: 4.25 stroke small block. Experience? [Re: cudadoug] #2713018 11/05/19 02:21 PM 11/05/19 02:21 PM
Joined: Dec 2018 Posts: 53 Northern Bavaria / Germany MichaelF member
MichaelF member Joined: Dec 2018 Posts: 53 Northern Bavaria / Germany	Originally Posted by cudadoug Originally Posted by MichaelF you mind sharing what he had to say? interested in this stuff also....Thanks! Michael Just that in a nutshell, the excess side loading deal is all talk. His piston called for a .003 piston to wall clearance to minimize piston rock to further help the situation. He claims many 4.25" crank combos in service with thousands of runs/miles, with no issues that he has been aware of. I must say again, Bloomer was great about my questions. We left our conversation with him wishing me luck if I bought this motor and if I had any more questions to reach out to him. Class guy! . Thanks a lot! Michael

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