I'm starting something I wanted to do for 10 years which has been stopped because of money and getting parts. 75 455 Block cleaned at Schmitts. Just getting it on the stand.
I took the rusted crank and sanded off the journals to plastigage the mains. I used the old stock main bearings that I saved and they came out close to .002 on all but #1. I miced the mains and that front one was a little less than 3.250. This 75 block is looking good to me.
Mike at AMP said 2 weeks so no. I was going to buy Pontiac rods and have them done to fit but after buying them and having them worked it was cheaper with Mike at AMP. I'm in no hurry so what do you have to offer? Any help from all Buick people is greatly appreciated. I live from paycheck to paycheck but want to go fast in a Buick before I die. I have a set of 430 heads I need to go through so without Stage 2 this would be the best option.
These are the pistons I'm going to use. Ross .030 they was in an engine for 18 passes with a KB 118 cam. They were on pressed rods so I am paying Mike at TA to sell me some wrist pins and cut them to fit to the locks. It is still cheaper than buying new pistons. My thought is I have these pistons so why not use them instead of throwing them in the trash. They are Flat tops. The valve reliefs are not big enough but I have grinders. If this works I'm an engineer right? I hate throwing Buick parts in the trash.
We have a set of BME 426 forging aluminum rods. They are 6.60" BBC with a .990" pin. The pin bore could be honed out to 1.00" for a floater pin. They where in a vintage Hydroplane 7.0 liter engine mostly 5000 to 6500 rpm test runs with occasional 7500 rpm peaks. No drag racing or dyno runs. Engine has a 3.4" stroke. Took the engine down for initial inspection and decided to go to the Callies Ultra steel rods. Would need to check with the owner to see if he would sell at a cheap price if you are interested. This was just a thought that just hit me. Paul
Richards wanted 250 and AMP wanted 200 so go with Buick machine guys cause they do it all the time is my guess. I had to explain to Richards about the resizing of the rods and then they come up with that price.
Paul, what is the big end id size and the width of the big end side to side? You know bbc has to be smaller than a Buick on the big end. I pretty sure but may be wrong.
BBC rods are .990" wide at the big end. I believe these rods measured at .987" The BBB rod journals would need to be widened close to 2.00" The big ends are set up for a 2.200" rod journal. paul
I'm assuming you are building this engine mainly for racing since the flat top pistons give you around 12:1 compression? I asked Jim Weise about the BBC rods on the Buick crank. He widens the BBB crank journals to fit the BBC rod width. Since the BBC standard crank rod journal is 2.200" and the BBB is 2.250" he offset grinds the Buick rod journals to increase the crank stroke. What is the piston pin compression height on the Ross pistons?
I have to check that I didn't use it but I think I still have a crank the is cut down to Pontiac bearing and widened with rolled filets. Then only the small end has to be honed. If interested I'll look tomorrow.
Check it to see how much it's been turned down on mains and rods and have you ever had it in a stock block before line hone and plastigaged it for clearance? The other guys said they would machine and sell me the rods for a great price but would like to try the other way also if the price of the crank is a good deal. I could also trade a core to offset the price if you need another one.
