I am stroking a 455. Does anyone know what kind of rods I should go for? I am trying to stay under 11:1 compression, and I am also trying to avoid going through dick miller, or mondello. I am not cheaping out I just don't want to buy a kit if I don't have to. Any info or help would be greatly appreciated. I am going off a 68 455 with a C heads and a nodular crank I will be having offset ground. Any info would be great

 

Pretty much doing the same here in Maplewood but with a sbo. Ask Cutlassefi on here, he is helping me.

 

Hey if your interested I have a clean 73 350, and th350 trans. 59k original miles.. looking to pull and sell lemme know.. runs and shifts like new

 

I assume you will be stroking it to 4.500 which is most common. In this case you will want to use a 7.100" rod designed for a BBC. The rods will need to be narrowed a bit on the big ends but that is no big deal for any machine shop. Both CP and Mahle make pistons designed for this application that are the correct compression height and have the correct pin bore for the .990 BBC pin size. The Mahle pistons are available in a 4.155 or a 4.185 bore with 22cc dish. The CP's are only available in a 4.185 bore and have an 18cc dish. Hope this helps.

 

Thanks but I am all set, block back from the machinest and a brand new Monster th350 in the garage......do you have a crank grinder picked yet? That is my next step, if you have any experience with shops here in the TC area let me know.

 

Crank shaft supply. It's in north mpls.. really good shop and also very knowledgeable.. google em

 

Thank you! This is the type of info I need!! Yes I was planning on the 4.5" stroke. I am a noob to strokers. Wouldn't I be better off woth the 22cc dish?

 

Depends. What are you going to use for heads? Pump gas I assume?

 

@ chadman. Yes pump or 108 octane. C heads small intake valve tho 1.998 talking to the shop to grind em to 2.11 should I grind the exhaust aswell? Getting s.s. valves too

 

pump or 108 octane...well which is it?

most pump gas premium is 91 octane, occassionally 92 or 93 & some places 94 is avaialbe. There is a big difference in 91-94 octane friendly & 108 friendly.

My 524 stroker has 11.2:1 compression with aluminum heads. I run 34 deg of timing with 94 octane @ 4000-6500' corrected elevation with no detonation issues. Many of the Husky & Petro Canada gas stations in Alberta have 94 Octane avaialbe as well as the 87-89-91 blends.

 

If you are going to run pump gas I would keep it around 10:1 or a little below on compression depending on how much cam it's going to get. In either case I would say yes you would be better off with the 22cc pistons. I just ran the calculations and it would be 10.04:1 with the 22cc pistons,.040 head gasket and .005 piston to deck clearance. If you pair this with the right cam it will run fine on premium pump gas. I currently run 10.2:1 in my '65 and it runs fine on pump gas but you have to have your tune spot on.

As far as the heads go a 2.07 intake and a 1.65 exhaust would be good and are common Olds sizes. I would also redcommend some port work to take advantage of the extra cubes and compression.

 

Any suggestions on where I should get the rods and pistons? Other than DMR or Mondello. I have looked into summit but they don't have much olds stuff :/

 

Call Bill Travato,he should have the rods and bearings in stock.He also has an awesome crank grinder.

 

Checked them out and talked to a person that was kind of rude and short with info. They also do not balance crankshafts.....anyone else you know of?

 

Good info Chadman.

The rods aren't for an Olds, they're longer than stock BBC, 7.100. Don't widen the rod journals more than necessary when grinding, take the extra width off the chamfer side of the rods, not the crank. Otherwise the grinding wheel on your crank grinder will start touching the inside of the counterweight. Not good when you go to balance it. Then use BBC Clevite HN series rod bearings.

I can probably get you a good deal on the pistons, and just do a Google search for the BB rods, mostly from Eagle.
You'll have to grind rod bolt reliefs in the block so be ready to assemble then disassemble it at least once.
I'd do the 22cc as well, especially with iron heads. If you want off the shelf valves that are bigger than the standard Olds sizes then use the Pontiac ones, 2.11/1.66. You can get them in lengths that are about .150 longer than a stock Olds valve. You will have to recheck your geometry though. Or SI valves makes a .100 long 2.125 intake for the Olds as well.

Good luck and keep us posted.

By the way, need a cam?

 

@ cutlassefi yea I am looking for a cam/lifter kit and pistons pm me.. so if I went with the bore @.o6o , stroked it, and did the exhaust valve stock(small valve C heads) and go for the bigger intake(2.o72, or bigger) what kind of lift/duration should I look for in a cam?

 

Talk to Justin Ford at Cylinder Head Express LLC. (763 783 1300) He is who I am having most of my work done through. But I am pretty sure crank shaft supply can do it.. I am going to both places tomorrow so I will ask more questions in person. I will let you know

 

I'd do the 2.125/1.68 valve combo along with at least some mild porting and bowl blending.
Pm'd you.

 

Thank You!! Just got off phone w bill himself. Very helpful I am definitely going to use this man as a contact for my project

His crank grinder quit on him and he no longer does in house crank grinds :'(

 

Just got back from crankshaft supply. They do and will offset and grind your crank aslong as they do not need to weld anything(add metal to grind) I just got my crank back from em and it looks beautiful! I also sold them my other N crank. I guess you just need to talk to the right person..idk..