Latest installment, I took advantage on a good price for Edelbrock performer heads and manifold and a set of roller rockers. After a small issue with the existing carb adapter overlapping the new manifold and unable to draw vacuum, the engine runs really sweetly, tickover is smooth and on throttle there is clearly a big increase in torque, power and rev range.
http://www.gt40s.com/forum/gt40-tec...t/25440-question-fitting-performer-heads.html
I went down south to my fathers this weekend, but despite the engine now running 10deg C cooler (now 75degC) I had a boilup when I ran into a traffic jam. Unsure of the cause I took the step of drilling holes in the thermostat for the journey back. After doing this, and despite all the checking I had done in days previous, I found that the radiator hoses leaked when hot. I learnt big time to tighten hose clips with a socket wrench, not a screwdriver!
Anyway, I notice that the thermostat seems quite small, and given the fact that with the holes drilled it is massively overcooled, there is so much capacity in the radiator that is untapped by this thermostat, so I have ordered a Mr Gasket high flow thermostat. Also I have removed the bleed nipple from my old radiator and am about to to install it in the rear of the inlet manifold, another idea from this forum. Thanks to Roy Smart and Paul Thompson for their advice on this issue, and to Jacmac for his advice while installing the heads and setting the lifters.
Dave
http://www.gt40s.com/forum/gt40-tec...t/25440-question-fitting-performer-heads.html
I went down south to my fathers this weekend, but despite the engine now running 10deg C cooler (now 75degC) I had a boilup when I ran into a traffic jam. Unsure of the cause I took the step of drilling holes in the thermostat for the journey back. After doing this, and despite all the checking I had done in days previous, I found that the radiator hoses leaked when hot. I learnt big time to tighten hose clips with a socket wrench, not a screwdriver!
Anyway, I notice that the thermostat seems quite small, and given the fact that with the holes drilled it is massively overcooled, there is so much capacity in the radiator that is untapped by this thermostat, so I have ordered a Mr Gasket high flow thermostat. Also I have removed the bleed nipple from my old radiator and am about to to install it in the rear of the inlet manifold, another idea from this forum. Thanks to Roy Smart and Paul Thompson for their advice on this issue, and to Jacmac for his advice while installing the heads and setting the lifters.
Dave