How Much Can Heads Improve Compression???
I have a "rainbow" of different small block heads on the shelf ready to go from my head guy.
I have heads for the 340/360 ranging from 68 - 80... (and a few in-between...)
But I did also find two series of 273/318 heads that look interesting....
One set is from 68-72 casting and has 1.88" intakes, 1.6" exhaust, and ported.
then I also found a set of 67 273 castings, also gone through by the head guy with 1.88" intake and 1.6" exhaust valves, and ported...
Now I don't have a flow bench, or access to one, but I think the 273/318 heads with the porting and 1.88"/1.60" valves will be just fine on the engine, and also be able to get us better compression numbers. We are going to cc the heads in the next week, and I will post the results when I can get them and analyze them. My head guy is pretty good at porting, so I think the "smaller" heads will be close to a stock 360 1.88" head for flow or maybe a little better, so I don't think that I need to run 360 heads with 2.02" intakes - I'll save them for a future 360 build...
So here are some pictures of "Option A" - 68-72 318 heads, ported, with 1.88" intake and 1.60" exhaust - black heads:
Here's "Option B" - 67 273 heads, ported, with 1.88" intakes and 1.60" exhaust valves - "red heads" - gigity, gigity...
I have a "rainbow" of different small block heads on the shelf ready to go from my head guy.
I have heads for the 340/360 ranging from 68 - 80... (and a few in-between...)
But I did also find two series of 273/318 heads that look interesting....
One set is from 68-72 casting and has 1.88" intakes, 1.6" exhaust, and ported.
then I also found a set of 67 273 castings, also gone through by the head guy with 1.88" intake and 1.6" exhaust valves, and ported...
Now I don't have a flow bench, or access to one, but I think the 273/318 heads with the porting and 1.88"/1.60" valves will be just fine on the engine, and also be able to get us better compression numbers. We are going to cc the heads in the next week, and I will post the results when I can get them and analyze them. My head guy is pretty good at porting, so I think the "smaller" heads will be close to a stock 360 1.88" head for flow or maybe a little better, so I don't think that I need to run 360 heads with 2.02" intakes - I'll save them for a future 360 build...
So here are some pictures of "Option A" - 68-72 318 heads, ported, with 1.88" intake and 1.60" exhaust - black heads:
Here's "Option B" - 67 273 heads, ported, with 1.88" intakes and 1.60" exhaust valves - "red heads" - gigity, gigity...
