morph'n a 2.25 to a 2.5

[Tim Smith]

Propane isn't very useful on a NA diesel vs. a turbo...

Really? I thought propane was to diesel motors as Nitrus is to petrol motors.

[SafeAirOne]

parts are in!...a rebuilt 7:1 shaved to give a 8.5:1, a 2.5 cam and .060 over pistons...

Sounds like you'll be rovering in no time


BTW...I was just noticing your signature. Did you always have "(ret)" on there? I don't remember it... If that's new, then congratulations!

[scott]

nc rover, i took pics but with it out the linkage just ain't there. but basically what i did was mount my weber so that the linkage is to the left (i have a lhd). i had to mess with it for a while but finally got a real smooth movement through the full range of the throttle. when i get it all back in i'll try and do a movie clip for ya

mark, yes the (Ret) is new and feels great.

[greenmeanie]

Scott,
Do you still have your old head? If it is scap it would be fun to section it and take some pictures of the intake and exhaust ports. Not that it'll ever be a power house but a few pictures of these would be fun to duscuss in terms of flow improvements.

Cheers
Gregor

[scott]

Scott,
Do you still have your old head? If it is scap it would be fun to section it and take some pictures of the intake and exhaust ports. Not that it'll ever be a power house but a few pictures of these would be fun to duscuss in terms of flow improvements.

Cheers
Gregor

i still have it, was going to turn it into a lawn ornament. are you suggesting disecting it? that would be a heck of a saw job

[SafeAirOne]

i still have it, was going to turn it into a lawn ornament. are you suggesting disecting it? that would be a heck of a saw job

Naw...A hack saw and a couple of good blades and you'll be done in no time!

[greenmeanie]

i still have it, was going to turn it into a lawn ornament. are you suggesting disecting it? that would be a heck of a saw job

Yup, stick her on the bench, slice and dice. A sectioned head like the engines you see in those in museums would be a cool ornament.

I would probably use a grinder with a cut off blade and then clean it up with a file. It would be nice to see a cross section of the intake port and the exhaust port as it can tell you a lot about how these things flow.

Of course a few beers later a horizontal cross section through the remaining intake and exhaust port would be a nice little project but a lot more cutting.

Out of interest, does anyone know the intake and exhaust valve size on a 2 1/4. I'm not planning a hot rod but the power in an engine is in its ability to breathe.

[yorker]

Mmmm I'd love to see the head sectioned- someone have a good chop saw?

[scott]

have you chop happies ever looked at a stripped down head? the ports are pretty straight, you can see the valves and they're only in a couple of inches in. where would you cut to see what you want?

[greenmeanie]

Oh yes I've looked at them. It's the corner radii and the proximity of the water jacket that are the really interesting thing. A sharp corner results in a lot of shrouding regardless of valve size. It is usually the material thickness ovver the water jacket that limits your ability to blend the corner.

Quite frankly your right - I am chop happy. If its scrap its worth getting somethig useful out of it. If I was doing a cross section I would cut on a vertical plane through the center line of the valve guide parallel to the direction of the intake port.

There's some cool pictures on line of chevy stuff done like this and it is very useful in understanding the flow problems in that head. It is also useful to consider things like the throat diameter of the valve seat vs valve diameter.

Man, I sound like I'm going to hot rod a 2 1/4.

[badvibes]

you know I'm good at breaking things...

Mmmm I'd love to see the head sectioned- someone have a good chop saw?

Scott-
I have a 14" chop saw if you're really feeling this ambitious... But was there any damage to the head? Might be something someone could actually use still.