79 Camaro Project
#551
It may have somethig to due with the design. Vortecs use the heart shaped chamber to create tumble in the air flow. If you open the gap I could see it slowing the fuel charge down. Vortecs rely heavily on the tumble phenominon. The 305 heads I have actually have a bump in the chamber to induce the tumble. I think 350's have the bump in the runner. I could be wrong.
Anyhow regardless of the engine I would shoot for .040" squish. My stroker is right there. Pistons are .005" in the hole with a 0.039" gasket. The tight squish or quench area creates higher velocity in the a/f mix. This makes the engine less prone to detonation. Timiing can also be advanced slightly more too. Although I have read Dirt's sticky and it states they almost always like 32*.
Anyhow regardless of the engine I would shoot for .040" squish. My stroker is right there. Pistons are .005" in the hole with a 0.039" gasket. The tight squish or quench area creates higher velocity in the a/f mix. This makes the engine less prone to detonation. Timiing can also be advanced slightly more too. Although I have read Dirt's sticky and it states they almost always like 32*.
#552
BTW Steve did you get gaskets for the older block or the newer heads? I can't seem to find an answer. Maybe it doesn't matter, I just want to be safe. I'm using 305 Vortecs on my 305 powered truck. Also a link to you intake gaskets too. Thanks in advance.
Damon
Damon
#553
The gaskets I got were like .016 thick. There us only one. I will get part numbers in morning. Chillin now.
#555
I think my next little project is going to be to pull the fenders off of the Z 28 and blast them and por15 inside of them so I can hand them off to my Father In Law to get going on body work and get them painted.
#557
Right, the vortec style heads don't have a vortec specific head gasket, you just want to shoot for the correct quench.
#558
Well I finally finished reading your project. Lots of great work you've done there. Its definitely at labor of love for us all who spend years working on restoring these old cars.