Mopar 350 Stroker

[Max1196]

https://www.forabodiesonly.com/mopar/threads/360-crank-in-318-block.425454/#post-197235280

 

[92b]

That is correct

Are you adding 1/2 the pins diameter to your measurement?

 

[B3422w5]

If a crank could be offset ground to increase stroke hence cubic inches someone has done it.

The attached article is not a stroker, but it will give you a good idea of what camshaft specs and valve diameter will really wake up a small bore build. It’s a very good read.

View attachment 1716488901

My old motor I ran!

 

[Racingcowboy89]

Are you adding 1/2 the pins diameter to your measurement?

From the top of the pin to the top of the piston is 1.387

 

[92b]

That is correct

If you didn't add in 1/2 the pins diameter you have a setup for a stock stroke 318. with a 9.6 deck it will be .0295 in the hole.

 

[ch1ll]

That is correct

What's the diameter of the wrist pin?

 

[92b]

From the top of the pin to the top of the piston is 1.387

in your first post your measurement is 1.327". Where did that come from?

 

[Mean416]

It would be neat to find and oddball old school stroker setup, but I couldn't imagine spending money to offset grind a crank these days, with how cheaply you can get an off the shelf stroker assembly.

 

[Racingcowboy89]

in your first post your measurement is 1.327". Where did that come from?

1.327 is was without the pin in

 

[Max1196]

Top of pin plus 1/2 of a chev pin diameter (.927") is, 1.327+ .4635 = 1.7905 for piston height. 1/2 (318 stroke is 1.655). 1.655 + 1.7905 + 6.125= 9.570 assuming no crank off-set going to the chev journal size, this puts the combo about 30 thou below unshaven stock deck height.

 

[Racingcowboy89]

It would be neat to find and oddball old school stroker setup, but I couldn't imagine spending money to offset grind a crank these days, with how cheaply you can get an off the shelf stroker assembly.

Well the guy I bought the engine from was in his mid 70's.

 

[Racingcowboy89]

Top of pin plus 1/2 of a chev pin diameter (.927") is, 1.327+ .4635 = 1.7905 for piston height. 1/2 (318 stroke is 1.655). 1.655 + 1.7905 + 6.125= 9.570 assuming no crank off-set going to the chev journal size, this puts the combo about 30 thou below unshaven stock deck height.

Add 360 crank or 4.000 Stroker crank what numbers would you have?

 

[92b]

This is based on your measurement from the first post 1.327. In post 29 you said 1.387. was that a mistyped?

 

[92b]

Add 360 crank or 4.000 Stroker crank what numbers would you have?

Something you won't be able to bolt a head to with that rod and piston.

 

[Racingcowboy89]

This is based on your measurement from the first post 1.327. In post 29 you said 1.387. was that a mistyped?

View attachment 1716488956

1.327 is what the neighbor had measured with the digital caliper and with the pin in I got 1.387 that is from the top of the pin to the top of the piston? You measure the inside of the top of the piston pin to the top of the piston if that is correct?

 

[Racingcowboy89]

Something you won't be able to bolt a head to with that rod and piston.

Then I would have to find different pistons cause Ross was the company who made them?

 

[Racingcowboy89]

Something you won't be able to bolt a head to with that rod and piston.

With a 3.31 crank from 318 wouldn't handle up to 6500 rpm's I don't think.

 

[Max1196]

Are the pistons stamped as .060 over OR is the actually 3.910 + .060 measured? If your going by a piston stamped as .060 AND it's a chevy piston on a chevy con-rod combo, this is starting to smell like the chevy 283 piston @ 3.875 + .060 = 3.935 bore instead, which is only a .025 overbore. FYI the 283 piston is about 1.790 comp distance.

 

[Racingcowboy89]

Are the pistons stamped as .060 over OR is the actually 3.910 + .060 measured? If your going by a piston stamped as .060 AND it's a chevy piston on a chevy con-rod combo, this is starting to smell like the chevy 283 piston @ 3.875 + .060 = 3.935 bore instead, which is only a .025 overbore. FYI the 283 piston is about 1.790 comp distance.

I have bore measurement in all eight cylinders 3.97

 

[92b]

1.327 is what the neighbor had measured with the digital caliper and with the pin in I got 1.387 that is from the top of the pin to the top of the piston? You measure the inside of the top of the piston pin to the top of the piston if that is correct?

What are these these three measurments?

 

[ch1ll]

It was pretty common then to have a Mopar 350 stroker?

I would say no.

 

[Racingcowboy89]

What are these these three measurments?

View attachment 1716488963

Something not adding up unless I doing something wrong.

 

[RustyRatRod]

Yall are just thinkin too hard. Here's your huckleberry. lol

 

[Racingcowboy89]

What are these these three measurments?

View attachment 1716488963

Something not adding up here.

 

[Racingcowboy89]

I think Ross sent the wrong pistons to the last owner???