Join Date: Sep 2002
Location: Concord, CA USA
Re: vegas heat, car running hot
Danyboy, heck yeah it makes a difference! I think I read on this site that the pressurized radiator cap value gives you double the amount in terms of temperature. In other words: I have a 16psi cap on my radiator. That means my system would not suffer boil over until 244* F (212 + 32) So even going from your current 7psi cap to a 16psi would give you 18* of leeway before trouble strikes.
Now, none of this solves your running hot condition. On very hot days out here in California, my car gets up to 195-200* - and almost never any hotter. You still have some tweaking to do to get your normal running temps down.
'68 Camaro RS
zz383 (2005) rebuilt in 2019
AFR 195s, Quick Fuel 680, 700r4, Detroit TruTrac 3:42s