I may have messed up here.....
A quick update on progress, and a belated thank you for everyone’s valuable advice!
We have arrived at a final spec, with -24cc pistons, of 9.7:1 compression which will run nicely on our pump fuel over here. The engine is not quite ready for the dyno, but the figures show 590hp and similar torque, I think max rpms won’t be much different to standard.
I do have one issue that I’d love some input on, and that concerns the head gaskets, or more specifically the three little horizontal slots in them.
Now, in the Jensen the engine is a VERY tight fit with pretty much no room around it in the engine bay, consequently they are notorious for overheating in traffic, of which there is a lot in our crowded little island! A lot of guys open up these slots from the current .720 x .118 to the old ‘pre-emissions’ spec of .940 x .455. See below:
Should I ask my builder to carry out this mod, or at least order custom gaskets with the larger slot size?
It’s a bit of a bugger, because he’s fitted the heads, but better to get this sorted now rather than when the motor is back in the car!
A quick update on progress, and a belated thank you for everyone’s valuable advice!
We have arrived at a final spec, with -24cc pistons, of 9.7:1 compression which will run nicely on our pump fuel over here. The engine is not quite ready for the dyno, but the figures show 590hp and similar torque, I think max rpms won’t be much different to standard.
I do have one issue that I’d love some input on, and that concerns the head gaskets, or more specifically the three little horizontal slots in them.
Now, in the Jensen the engine is a VERY tight fit with pretty much no room around it in the engine bay, consequently they are notorious for overheating in traffic, of which there is a lot in our crowded little island! A lot of guys open up these slots from the current .720 x .118 to the old ‘pre-emissions’ spec of .940 x .455. See below:
Should I ask my builder to carry out this mod, or at least order custom gaskets with the larger slot size?
It’s a bit of a bugger, because he’s fitted the heads, but better to get this sorted now rather than when the motor is back in the car!
