Looking for some slant six numbers stock cam and CFM

[65V200Valiant]

Hello all, first post on the forums. Making a big road-trip out west in my 1965 Valiant V200 Convert. "Valerie" Looking to get a DUI Tri-Power distributor ordered before this happens so I get better mileage and better highway performance. The problem is I'm missing some important numbers before I can order. (I'm out west the car's back east). I was wondering if anyone knows the "Advertised" Cam Duration, Cam Duration (@.050) and CFM for a stock 1970 225ci slant? I think I've figured out the rest of the numbers using online research.

 

[KosmicKuda]

First, welcome to the camp.
If Slant Six Dan hadn't retired he'd for sure say convert to a GM HEI module with a Mopar factory electronic distributor. Search this section as this has been covered a lot. The /6 cam specs are dismal. My stock 64 cam had .375 lift.

There are a lot of people here that know far more than me but I don't think its necessary to spend big bucks on things that aren't broken. I will probably go the electronic route but for right now I'm running points with quality parts recommended by SSD. 4000 miles and everything is good. I'm convinced the biggest increase in mileage would be an OD but in the mean time my 1964 225, 3.23 rear, and 3 speed manual got 24 mpg going the 320 miles to Carlisle last year.

 

[dart19666]

You know I just wrote about this very thing. Here is a copy and paste of what I found.

Ok Cam talk time. So as we know I am new to these leaning towers of ok power. I have always wondered why the stock valve setting are what they are 0.010"/0.020" and now I have my answer and a very good reason why you NEVER pick a cam based on advertised duration. So I pulled out a few 100% stock cams 1968 and 2 1969 cams and they have the exact same specs so we are good on that. Duration at 0.050" 175/184 on a 110 lsa with a lobe lift of 0.217"/0.231" but here is where the funny business comes in. The ramp rates now let look at the intake first, duration at 0.005" 229, 0.010" 217, 0.020" 201, 0.050" 175, 0.100" 141, and 0.200"72. I design cam profiles for a living and these are more in line with modern Hydraulic flat tappet profiles hence the reason for the 0.010" lash. Now the exhaust is 100% like a solid flat tappet should be for that time. Duration 0.005" 326, 0.010" 271, 0.020" 223, 0.050" 184, 0.100" 148, and 0.200" 71. Now this is why the the lash on the exhaust is set at 0.020" because that is when the ramp rate really starts to move fast. The cam that I am doing for my new slant six is going to be a duration at 0.050" 204/208 on a 110lsa with a 0.299" lobe lift. These masters are true solid profiles so the lash will be 0.020" intake and 0.022" exhaust when done. So for me the age old mystery of this lash has been solved.

 

[AJ/FormS]

That's some good homework,right there,
I snagged the.010/.020 numbers and plugged them into the Wallace with an install of 108.5 for an ICA of 37*,and at sealevel, for a 225,this is what it spit out;

Static compression ratio of 8.0:1.
Effective stroke is 3.83 inches.
Your dynamic compression ratio is 7.50:1 .
Your dynamic cranking pressure is 150.26 PSI.
V/P (Volume to Pressure Index) is 94 .
And that 94 is what makes the 225 legendary

BTW; zero overlap,lol.

 

[RustyRatRod]

One of the stock mechanical cams had .414 lift. That's the one I would use.

 

[dart19666]

Ok I found my cylinder head flow sheet for you. This was before any work was done. Just right off the engine right to the flow bench.
In Ex
0.100" 49 32
0.200" 97 53
0.300" 128 67
0.400" 139 110
0.450" 144 114
0.500" 145 114

 

[Charrlie_S]

Hello all, first post on the forums. Making a big road-trip out west in my 1965 Valiant V200 Convert. "Valerie" Looking to get a DUI Tri-Power distributor ordered before this happens so I get better mileage and better highway performance..

If that is the distributer I'm thinking of, I doubt you will get better fuel mileage. It does not have vacuum advance. Before ordering ask if it has vacuum advance.