7 replies to this topic

[croc7]

Street car, 1360, 10.5:1 compression. Currently running a 13# cap. Would the mini cooling system like a 15# rad cap?

[unburntfuelinthemorning]

As standard, in the British market at least, I believe the 13lb caps were used when a 180^oF thermostat was used and a 15lb cap when a 190^oF 'stat was used.

[mini13]

realistically its not going to gain you anything, all it does is push the boiling point up a few degrees, using an onlin calculateor i get the below results for the boiling points

 

13lb cap   118deg c

15lb cap   120deg c

[nicklouse]

only ever used a 13LBs cap. never needed anything else.

[Retroman]

What thermostat are you running ?

 

Is heat a problem?

[gazza82]

One problem is usually the length of the rad cap .. some are shorter and therefore don't seal properly .. meaning you lose your coolant when it heats up.

[cooperd70]

Std up to '74 13lb cap and from '74 onwards 15lb cap. Thermostat was 82c up until '76 and 88c after in the UK.

[croc7]

What thermostat are you running ?

 

Is heat a problem?

180 degree.  No problem with heat, just curious is all.