zorartic

Also! This is probably a stupid idea but as I mentioned, due to where I live nobody knows how to regrind a camshaft for higher lift and duration, the machine shops know how to work but have never heard of this process and none of them speak English. Now sending a cam to be reground to another country is stupid expensive taking shipping and the exchange rate into account, so I wanted to know how do I explain to a machine shop the specifications of having a cam reground if they’ve never specifically done one? I can show them videos but how do we know how much material to take off the base circle to reach the desired lift and duration? and how do we ensure that the all lobes are ground evenly by the exact same amount? Cheers

Thank you for your timely responses I will surely calculate the compression ratios although i believe the shop has finalized on the flat head being the best option. Currently on a stock 4K I'm running 92 octane most of the time, but once the 7K is built ill run 97

Hello folks! I’m a 20 year old getting a 7K motor rebuilt to go into my TE71 fastback, the mechanical work will be done by the shop but I live in a 3rd world country where there’s isnt much technical theoretical knowledge but stuff just works haha Now the head that came with my 7K (on the right) was said to be weak and had been faced so went out and sourced another one which was difficult, but the shop found one which is out of another engine and much better (on the left). However this new head seems to lack this depression cavity cutout around the valves as observed on the one on the right. My questions are: 1. What does this cavity do, are there different types of 7K heads with and without this cavity? 2. What effect will there be if I pair dished pistons with each of these heads, the old weak valve cavity one vs the new flat head? Cheers :)