1972 Dodge Colt

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Hyper_pak said:
A few interesting discoveries working on the engine.

I put a dial indicator on my Cox/RAS? Roller rockers.
Marked with a 1.5 under roller tip.
They were purchased as 1.5 rockers.
They measure as 1.6 rockers!

I wanted to check the spec on a Roller Cam I purchased from Cox Brothers a few years ago.
No cam card furnished.
Now that I have some roller rockers I can run the numbers.
Problem, It won't clear the cam bearings as it goes in half way.
Now I know it has never been ground.

I used 3 copper gaskets to add deck height so I could check piston to valve clearance.
I got a measurement Saturday after I got some Manley 7 deg. retainers to fit the valves.
What I measured was what I expected with this big head cut.

Now I need some springs.

I made many trips to my machine shop today on cutting the pistons.
He could not use the direct connection instruction for valve notches.
He let me borrow a transfer punch to center punch the I and E centers.
View attachment 1716209513



_________________
Click to expand...
Those RAS Rocker shafts can be thin/ soft - Don't tighten them too much as they will squash out and bind. I used less torque and some red loctite on the RAS unit I have n my '69 Dart. They have worked fine since ~2006. and ~30,000 Miles.
 
Hyper_pak said:
A few interesting discoveries working on the engine.

I put a dial indicator on my Cox/RAS? Roller rockers.
Marked with a 1.5 under roller tip.
They were purchased as 1.5 rockers.
They measure as 1.6 rockers!

I wanted to check the spec on a Roller Cam I purchased from Cox Brothers a few years ago.
No cam card furnished.
Now that I have some roller rockers I can run the numbers.
Problem, It won't clear the cam bearings as it goes in half way.
Now I know it has never been ground.

I used 3 copper gaskets to add deck height so I could check piston to valve clearance.
I got a measurement Saturday after I got some Manley 7 deg. retainers to fit the valves.
What I measured was what I expected with this big head cut.

Now I need some springs.

I made many trips to my machine shop today on cutting the pistons.
He could not use the direct connection instruction for valve notches.
He let me borrow a transfer punch to center punch the I and E centers.
View attachment 1716209513



_________________
Click to expand...
Stan, what size valves are those?
 
Im jealous of slant 6 milling, 1 head ...no surfacing intake manifold. That's a lot to cut lol.
I took .080 off of my heads and a lot more than that off of the intake manifold, it was pure pain in butt
 
MOPARMAGA said:
Im jealous of slant 6 milling, 1 head ...no surfacing intake manifold. That's a lot to cut lol.
I took .080 off of my heads and a lot more than that off of the intake manifold, it was pure pain in butt
Click to expand...
Yea, it's got some advantages.
But hard to make HP, at least for me it is.
I helped a guy with a max wedge years ago.
He had a shop in Richmond VA do the machining on a stage II engine.
We could not get the intake to fit, called the shop, they had milled the heads and did not record the cut!
And they did not cut the intake side.
Somehow we had another crossram that had been cut and it FIT!
What are the odds of that.
62 Dodge Polara 500, a heavy boat, went 9.90 back in the 90's.
Dons Demon Dodge s.JPG
 
Hyper_pak said:
Yea, it's got some advantages.
But hard to make HP, at least for me it is.
I helped a guy with a max wedge years ago.
He had a shop in Richmond VA do the machining on a stage II engine.
We could not get the intake to fit, called the shop, they had milled the heads and did not record the cut!
And they did not cut the intake side.
Somehow we had another crossram that had been cut and it FIT!
What are the odds of that.
62 Dodge Polara 500, a heavy boat, went 9.90 back in the 90's.
View attachment 1716209574
Click to expand...
That's an awesome car. I think I had to take .160 off of the intake faces and .060 on the plenum base. I really warped the tunnel ram when I welded the runners.
 
slant six said:
Those RAS Rocker shafts can be thin/ soft - Don't tighten them too much as they will squash out and bind. I used less torque and some red loctite on the RAS unit I have n my '69 Dart. They have worked fine since ~2006. and ~30,000 Miles.
Click to expand...
I never had any problems with the shafts. The torque is pretty low if I remember. Like 35 lbs/ft?
 
Hyper_pak said:
Hey Rusty, Manley 11/32 stems, 1.78 ish, 1.50.
Corse my bore is only 3.46, not like some 3.54 bores the other guys are running.
Click to expand...
Almost seems like a /6 is a good candidate for big sleeves maybe a 4 inch bore and a deep fill of hard blok, I'm not sure I've never had one on the boring bar yet, so if it's even possible I'm sure someone would have done it
 
Hyper_pak said:
Hey Rusty, Manley 11/32 stems, 1.78 ish, 1.50.
Corse my bore is only 3.46, not like some 3.54 bores the other guys are running.
Click to expand...
Mine is only 3.445. I'll be running the same size valves.
 
MOPARMAGA said:
Almost seems like a /6 is a good candidate for big sleeves maybe a 4 inch bore and a deep fill of hard blok, I'm not sure I've never had one on the boring bar yet, so if it's even possible I'm sure someone would have done it
Click to expand...
Not enough engine there. @805moparkid and I have researched it pretty well. We had hoped early hemi heads were close with the bore centers and head bolt pattern. Nope.
 
RustyRatRod said:
Mine is only 3.445. I'll be running the same size valves.
Click to expand...
I had ground small notches at the top of the bore on the intake side.
Corse my pistons are down .085 with low old school ring packages.
The more I work with mine and talk with the machine shop, this is an old school combination.
Could be a lot better. A LOT.
I need to stay on track and get this engine back together and running.
I have a $300 grudge race at MOKAN to get ready for.
Public Enemy #1
buzzinhalfdozen.jpg
 
Hyper_pak said:
I had ground small notches at the top of the bore on the intake side.
Corse my pistons are down .085 with low old school ring packages.
The more I work with mine and talk with the machine shop, this is an old school combination.
Could be a lot better. A LOT.
I need to stay on track and get this engine back together and running.
I have a $300 grudge race at MOKAN to get ready for.
Public Enemy #1
View attachment 1716209797
Click to expand...
Get crackin buddy. Keep us posted!
 
This is what it looks like when it gets done.
They didn't care very much for my pressed pistons.
But it is a race shop so I understand.
They did hone my pistons pin bosses and they are a lot better.
Resized_20240223_172134_1708736878744.jpeg
 
Got all the parts for the valve train.
Cleaned the block again.
Checked the rings for ring gaps.
Cleaned all the pistons and rods.
Have the crank ready to drop in tomorrow.
I added up all the weights and it looks like I have lost 24 lbs. between the crank and head.
I like that number!
 
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