That is an interesting test, considering we are yet to see a typical summer day here in S TX this year 
(lol) The high(s) lately was only in the mid 80's if I recall.
We've been over this issue many, many times on the turbo Buick boards/list since the late 80's/early 90's. Yes, in Phoenix you definitely have cause for concern with a big fm IC that would block ~ the entire rad. With one that doesn't, like say the PTE fm, that might be more workable. I'm sure that Nick M, et al can provide more info from Phoenix. If you want the temp to stay below 195 or so you'll have your work cut out for you either way.
Those of us who have been running big fm IC's (as in the V1 or equivalent) here in S TX for the last ~ 10 years or so have found that yes, it can/does cause temperature issues when the summer heat is on. Those issues can get expensive to address, depending on how much compromise you are willing to accept. Throwing on an aftermarket fan and/or water wetter in the rad just doesn't cut it. We've BTDT ad nauseum...
Unless you're trying to push past say the mid 10's or so then IMO the PTE stock loc IC (or equiv) is the right choice, especially if you live S where temperature is a big issue. It doesn't have the sex appeal of a fm, but it would work better overall on a street car. That last +10 deg from ~ 90 ambient to ~ 100+ ambient can make a big difference in the results...
JMO. As usual, YMMV.
TurboTR
(lol) The high(s) lately was only in the mid 80's if I recall.We've been over this issue many, many times on the turbo Buick boards/list since the late 80's/early 90's. Yes, in Phoenix you definitely have cause for concern with a big fm IC that would block ~ the entire rad. With one that doesn't, like say the PTE fm, that might be more workable. I'm sure that Nick M, et al can provide more info from Phoenix. If you want the temp to stay below 195 or so you'll have your work cut out for you either way.
Those of us who have been running big fm IC's (as in the V1 or equivalent) here in S TX for the last ~ 10 years or so have found that yes, it can/does cause temperature issues when the summer heat is on. Those issues can get expensive to address, depending on how much compromise you are willing to accept. Throwing on an aftermarket fan and/or water wetter in the rad just doesn't cut it. We've BTDT ad nauseum...
Unless you're trying to push past say the mid 10's or so then IMO the PTE stock loc IC (or equiv) is the right choice, especially if you live S where temperature is a big issue. It doesn't have the sex appeal of a fm, but it would work better overall on a street car. That last +10 deg from ~ 90 ambient to ~ 100+ ambient can make a big difference in the results...
JMO. As usual, YMMV.
TurboTR
