1.8 bar modification for 5kcsq

[Eyvind Spangen]

On Mon, 6 Aug 2001 06:58:42 -0500, you wrote:

>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 ?  Thanks for the help.

The engine is engineered with quite a "overkill" when running at 1.4.
No modifications should be needed when going to 1.8, but as already
said, installing a larger (or 20v single-pass) intercooler will help
on performance. The exhaust is a bit on the restrictive side too, but
a larger exhaust will probably increase noise, and most people don't
want that..

-- 
Regards,
ES