Xtnct00WS6

iTrader: (8)

I'm trying to figure out how much is a good amount to mill some 243's.

I'm trying to figure out how much would be good while keeping a few things in mind. I want to have the the ability to get a 230/230ish cam in there with no problem. Push rod length is also a consideration. I'd prefer it to be easy to pick the length and not have it end up in between the push rod lenghts (7.4 and 7.375 for example).

I don't know what the base circle of my cam is so if someone could chime in on that, I'd appreciate it. I don't even know what that measurement is. It's the TR 224 I have in there now though.

I'm thinking .015 mill would be good to bring my total "mill" to ~.025 since I'll be using a cometic gasket of .045. Here are my measurements:

stock gasket = .054 - .045 (cometic) = .009
.009 + .015 (mill) = .024

.024 - 7.4 = 7.376 (or close enough to 7.375 that I wouldn't worry about it)

.015 mill good? What do you think?

Thanks guys!

P.S. Search isn't being friendly so please don't refer me to it.

PREDATOR-Z

You have to take into account the (base circle difference)/2 on the longer side.

Xtnct00WS6

iTrader: (8)

Ok...I just called TR and they said the base circle of my cam is about .030 smaller than stock. How does that factor in to my measurements?

Xtnct00WS6

iTrader: (8)

Ok...I think I figured it out. Let me know what you guys think:

stock gasket = .054 - .045 (cometic) = .009
.009 + .021 (mill) = .030

.030 - 7.4 = 7.370

7.370 + .030 (b/c of the smaller base circle of the cam) = 7.400

I guess my answer is a .021 mill?

One other question is, would it be better to have slightly longer or shorter pushrods?

BADFNZ

iTrader: (19)

I believe base circle is measured as a diameter, not a radius, so you should add .015, not .030. Someone will have to double check me.

NoGamesLS1

iTrader: (16)

http://www.diamondracing.net/cocalc.htm