Reverse Cooling?

[Don.F.Broadus at ucm.com]

Another benefit of the reverse cooling was the dual thermostat setup that
reduced the thermal shock to the engine during warm up.
As far as I can tell the late LT1 is the only reverse cooled SBC. The
reverse cooled engines had different block castings and water pumps and
intake manifolds.  

> -----Original Message-----
> From:	Matt S Bower [SMTP:m.s.bower at cummins.com]
> Sent:	Tuesday, May 04, 1999 7:24 AM
> To:	diy_efi at efi332.eng.ohio-state.edu
> Subject:	Re: Reverse Cooling?
> 
> GM went to it earlier than the LT1.  If you look at late 80's IROC's
> TA's and vettes they should all be reverse flowed.  The reason as I can
> recall was something to do with trying to control the head temps for
> emmisions.  They were able to get around the need with the LS1 engine
> and went back to the standard flow which I believe keeps the whole
> system at a more uniform temp.  Bottom line still is that the gains
> weren't high enough for anyone else to fool with it.
> 
> Thomas Martin wrote:
> > 
> > Has anyone retorfitted an older V8 (non LT1) with reverse cooling?
> > 
> > Is there any drawbacks to reverse cooling vs conventional?  It is worth
> the
> > mechanical rework to do?
> > 
> > I am curious to see why GM did it on the LT1, and from what I have
> gathered, dropped
> > it on the LS1.  Knowing GM, there MUST have been a good reason.
> > 
> > Thanks!
> > Thomas Martin