Quick inline six head question???

How high would compression be if one were to put a 230 head on a 292 motor. I don't want that integrated head, but the only non-integrated that I have is from a 230. Does anyone see a problem with this??


Thanks in advance,
Zor

 

I (believe) the heads are the same.

 

I believe the hot set-up is the 194 head, but I don't know if it will work on the 292.

 

194 has a smaller combustion chamber 230 should be ok unless you have flat tops or popups.

 

If you have flat tops in the 292 you dont need the extra compression of the 194 head . The rest I was always led to believe are the same Ccs as the 292 if not even the same head. When using a smaller head sometimes the power doesnt come that one would hope. That is because there is not enough room around the valves for good flow. Some folks call that shrouding. What makes the biggest difference in port flow is getting air to flow all the way around the valve at higher lifts. Quite often it does not. For a real good visual on this problem pour an ordinary tea pot. In most cases they pour terrible because of the shape of the spout. A shoruded valve and a valve with a less than ideal valve pocket also flows air the same way especially at higher lift. You can easily see that if it would flow all around in a steady stream or flow volume delivered would be much much greater. In fact when i do Chev six heads I reduce the diameter of a 194 Chev v8 intake valve to 188 . I work the bowl to get it as deep as possible straight in so flow behind and up to the valve is as similar as possible. This boosts cfm greatly. Compression requirements are a function of what is needed for good power and camshaft intake closing. Longer the intake stays open the more compression ratio is neded to keep the compressed pressure in the zone since there is less distance (stroke) to do it in. So compression in ando f itself is not the ball game. In sync with what is going in the rest of the engine is the whole anchelotta.

 

The 230 can have anything from 72.38-75.5 CCs So can the 292 it all depends On the casting Number of the head/s So with a stock 292 piston It won't do much to the compression for you to notice.

 

Dolmetsch,
Thanks for the in depth info. this motor will be relatively stock/mild. I just wanted to make sure that the combustion chamber size wasn't going to up the compression ratio so much that I would need to up the octane.