clearancing a 400

[highflyer924]

Was wondering about how much material is need to be removed to clearance a sbc 400 to use a 3.875 stroke crank with 6.0 H beam rods

[Nobody]

Going to depend on rod and crank choice mostly as well as block. Cam to rod clearance is also going to be an issue so choose wisely on rods.

[runyou-2]

I built a 434 (4" stroke)in 2010 using all Callies and a SHP block.THEY claimed the rods would clear the cam,but i had to grind on the rods because they HIT the cam lobes.Race it for 3 years.I know for sure you won't have a problem clearing the cam using Callies Rods with a 3.875 crank,but you will have to have the block machined along the pan rails a little bit.If using a SHP block,they come clearanced at the rails. Badazz engine for sure with that stroke.

[Necrosis]

You can use Honda or even a BMW journal depending on the application to help with clearance. Find some used Plankl or Lentz rods with 5/16 bolts and you will have a good start, and probably save some money.

[Necrosis]

Small base circle cams kill parts. Get the biggest base circle you can.

[dave41]

does the 4--7 swap solve clearance problem on cam

[kydirt]

Use a small base circle cam and callies has a new rod for this application ultra hd.

[runyou-2]

does the 4--7 swap solve clearance problem on cam

Didn't with me! And YES we used a Comp small base circle roller cam with the 4/7 swap.I about came unglued when building this 434 in 2010 when the Callies rods HIT the cam lobes.Literally stopped me from rolling over the crank.We had talked to Professional builders,Callies,and a Comp HEAD.They said you will be fine,everything should clear.Well,it didn't.It took me probably 12 hours to gently grind then feather polish every rod until i got 0.45 clearance between cap and lobe.Take apart,grind,clean,install SEVERAL times on each one of them.It worked.Ran like a monster for three years,along with RHS 235 runners 49cc 14* iron heads,using a 5/8" alum spacer under the intake all around so the intake reached the heads.LoL Looks just like a BB on top. MONSTER!!! They didn't even make an intake for those heads at the time, and had to beg Shoenfield to die-up and make me headers with an 18* plate on them. Pushrods are over 9"s long too.Still running it all though!

Yes,NOW they have Rods that will clear,but at that time i think they were experimenting with BB strokes vs. rods, and we were one of their Guinea pigs.