most #292 Turbo Heads i've seen that were cracked across the Intake and Exhaust Seatscgarb wrote: ↑Wed Sep 22, 2021 5:27 pm How do you keep the 292's from cracking?...lol. That's what put an end to mine. A crack between the intake and exhaust seat. None of the local shops wanted to attempt fixing it and I figured they probably aren't worth what I would have to spend to get them repaired anyway. They ran decent for what they were for a long while. I ran them about 8-10 years in total on a drag car. When I went to roller cams is when the trouble started.
never leaked Water , or showed no signs of leaking water. ( other times , yes they leaked a very tiny bit , but still ran fast )
I pressure checked them and couldn't get the crack to leak , but thats a cold temp test ,
but like i said above , during full load Drastrip Runs , no evidence of leaking .
One of Cunningham's #292's had 2 Cylinder with cracks there , never leaked or affected ET Slip times .
These were 2.080/1.600 valves ... i trimmed a couple of exhaust valves to 1.580 to 1.590 on a couple of Cylinders that guide spacing was too close
John had 3 #292 Turbo Headed Engines .. (2) 296cid and (1)292cid SBC
Radiator Cap's pressure plays a part in this too .
Moroso Ceramic Seal usually fixed some cracks i've seen .