Dear All
Anybody have any experience with the 3V Aussie Heads and what kind of manifold intakes actually fit with these.
I know the intakes are smaller in height and width.
Thanks.
Tom
Original Post
I have those heads. Ive noted improvement through all RPM ranges but especially noticeable in the low and midrange. Throttle response improved and more vacuum with bigger cam. The intake is a TFC single plane that was port matched and a "Mighty Demon" 750 carb. I have more low end now than with my old Ford aluminum dual plane with 670 Holley.
There are some things (headaches) that are not mentioned in the sales brochures. 1.They recommend head studs. Its easier to do this when engine out of the car.
2. you have to elongate the intake bolt holes to line up with the heads (unless they fixed that)and use a big gob of silicone at the end rails. They now have a end rail adapter piece to help with that.
3. If you have open chamber heads now with a domed piston you will need new pistons. Need flat top, dished or custom pistons. The CHI combustion chamber is smaller than the Ford 4V quench head.
4. I used REV valves, 2.15 intake with 1.65 exhaust. The exhaust valves had to be cut by REV from a standard 1.71 cleveland valve.
The rest is all Crane valve train.
I use PI Big throat headers.
There is another person building a CHI 3V head motor with 180 degree headers.
There are some things (headaches) that are not mentioned in the sales brochures. 1.They recommend head studs. Its easier to do this when engine out of the car.
2. you have to elongate the intake bolt holes to line up with the heads (unless they fixed that)and use a big gob of silicone at the end rails. They now have a end rail adapter piece to help with that.
3. If you have open chamber heads now with a domed piston you will need new pistons. Need flat top, dished or custom pistons. The CHI combustion chamber is smaller than the Ford 4V quench head.
4. I used REV valves, 2.15 intake with 1.65 exhaust. The exhaust valves had to be cut by REV from a standard 1.71 cleveland valve.
The rest is all Crane valve train.
I use PI Big throat headers.
There is another person building a CHI 3V head motor with 180 degree headers.