1.8 bar modification for 5kcsq

[Michael Gough]

The 5k radiators are pretty big, you shouldn't have much trouble. The thing is, you can't really use that 1.8 bar much anyway. Unless you are climbing a hill, you can't be in boost for very long or you will start to get into illegal speeds. Worst case scenario, it does start to overheat going up a hill at 1.8 bar, so just let your foot off the pedal a little 'till you are at 1.4 like stock. I've seen all aluminum radiators in 5k cars at the junkyard. You could upgrade your brass (it's brass right?) one to an aluminum unit if you needed to climb 100 mile long hills at 100 mph in 100° weather. The intercooler is the biggest thing I think. The stock 5kt intercooler SUCKS. You could make new end tanks for it to make it single pass, or get a 20v one, or just find any intercooler that is better.
Mike

I have a question about radiator 
> capacity/modifications that might be necessary to accommodate a higher 
> boost.  I am in the process of installing SJM-AutoTechnik's modified 
> ECU with the 1.8 bar WG spring in my 87 5kcsq.  The higher boost ought 
> to mean higher heat generation in the engine, and therefore should need a higher 
> heat dissipating capacity.  In a typical heat exchanger design, we would 
> increase the area of the heat exchanger, or let the radiator operate at a higher 
> temperature (i.e., increase the temparature difference between the coolant and 
> the air to accomodate a larger heat duty with the same area.  Is there any 
> BTDT on this matter among the listers on the impact of increasing boost on 
> radiator/engine cooling performance ?&nbsp; Thanks for the help.</FONT></DIV>
> <DIV><FONT face="Comic Sans MS" size=2>Chander</FONT></DIV></BODY></HTML>


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