Hi Scott,
I think I'd pull the thermostat if you have one. Sites I've read
indicate the new LT1 cools the heads first then the block, that's
backwards from any other engine, so for sure a regulator thermostat
wouldn't work.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Scott wrote:
>
> Guys,
> I just bought a new custom radiator for my 90 YJ. The YJ has a 1994
> Corvette LT1 in it, so I guess this makes this question a bit off topic.
> But, Bill ------ is always listening. :) LOL. In any event, after
> installing this monster aluminum radiator, the jeep seems to exibit some
> strange behavior. When you sit at idle, the electric fan keeps the
> temperature down. But, if you go ANYWHERE, the temp rises immediately. I
> can't even make it a mile without it going up to 235+. In any event, I've
> just (at the same time) put a completely new thermostat (180 degrees) and
> new water pump on the engine. But, the behavior almost seems like what
> would happen if the water pump just weren't pumping. Since the cooling
> system is the reverse flow, it is difficult to tell if the pump is pumping
> at expected rates. Is there a test to make sure that it is? Bill, anyone,
> any thoughts? It is a pretty defeating feeling after spending that much
> money on a radiator, SPAL fan, water pump, thermostat, and a bunch of
> gaskets. Any suggestions are appreciated.
> TIA.
> Scott
>
> FYI, it's a 90 wrangler with a 94 LT1. The new radiator is a custom build
> from Ron Davis Radiators. The electric fan is a SPAL high flow fan. There
> is a custom shroud on it too.