AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
- Joined
- Jan 19, 2014
- Messages
- 24,933
- Reaction score
- 12,282
As to ring gaps yes, the Hypers gotta be right.
I installed mine by the book , and had nothing but heat troubles for about ten weeks. and Every time I shut her off I was in for a 10>15 minute wait, before the starter could wind her up again. I tried everything but couldn't get to the bottom of it.
So I took the engine down, loosened the skirt clearance, and opened the gaps up to the next bigger ring-factor, which, IIRC ended at .034 for the tops and for good measure, I open the Second gaps a few thou too.
And that was the end of overheating.
It had a trace of piston slap on cold mornings, so I installed a 195 stat which actually runs at 205 as measured by IR gun. By this time I had already installed a hi-flow Pump, Hi-flo stat, and had installed a Thermostatic clutch on the Biggest fan I could find. and the shroud had always been on there together with the cowl-seal and the top of the rad seal. My rad is an ancient one off a 1973 Dart with A/C; She's a 26 incher but still in the 22" core-opening. Even the patches on it have patches.
I never even look at the stock temp gauge any more.
Did I loose Power?
Hell no!
and when I had a double overdrive in her, I could cruise at any speed I dared to.
I gotta say, for me, the Hypers were the right pistons, and they now have over 125,000 miles on them, so they've done well. They are lightweight and the 360 neutral-revs like no other engine I've ever had. I think they were around 505gms
I installed mine by the book , and had nothing but heat troubles for about ten weeks. and Every time I shut her off I was in for a 10>15 minute wait, before the starter could wind her up again. I tried everything but couldn't get to the bottom of it.
So I took the engine down, loosened the skirt clearance, and opened the gaps up to the next bigger ring-factor, which, IIRC ended at .034 for the tops and for good measure, I open the Second gaps a few thou too.
And that was the end of overheating.
It had a trace of piston slap on cold mornings, so I installed a 195 stat which actually runs at 205 as measured by IR gun. By this time I had already installed a hi-flow Pump, Hi-flo stat, and had installed a Thermostatic clutch on the Biggest fan I could find. and the shroud had always been on there together with the cowl-seal and the top of the rad seal. My rad is an ancient one off a 1973 Dart with A/C; She's a 26 incher but still in the 22" core-opening. Even the patches on it have patches.
I never even look at the stock temp gauge any more.
Did I loose Power?
Hell no!
and when I had a double overdrive in her, I could cruise at any speed I dared to.
I gotta say, for me, the Hypers were the right pistons, and they now have over 125,000 miles on them, so they've done well. They are lightweight and the 360 neutral-revs like no other engine I've ever had. I think they were around 505gms