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Pontiac of the Month

J J Web's 1967 Lemans

2024 May
of the Month

4 bucket 67

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Posts posted by 4 bucket 67

  1. Thanks for the responses , I just finished putting in a mechanical gauge , a 195 degree thermostat , and a 16 lb. cap ( all at engine builders request ) . Car is at 205 at idle and driving , and up to 215 with a/c on driving . Some are telling me that is normal .

  2. This is my 1st forum , hope I'm doing it right . I have a 67 GTO , with a new engine , that overheats like the old one . My electric rally gauge is incorrect , and I'm using an infrared thermometer currently . At an idle of less than 1000 rpm temp is about 170 degrees on front of intake , and about 185 or less on radiator tank . At 2000 rpm , I get to 200 degrees at intake , and close to 215 at rad. I've mounted a 3000 cfm pulling , cooling fan within my original fan shroud . The car has Vintage Air , and trans cooler , but will still  slightly pull a bag to the grill . It really doesn't do any more for the temp than the clutch fan . I have an aluminum rad that is supposed to flow more than the old one . The engine is a 455 with 670 heads , and 30cc dished pistons that are supposed to make it less than 9.5:1 .   

    I'm planning to drive to the GTOAA convention in WA from PA on July 9 , but only if car is drivable . Please give any answers that may help . Thanks , Brad

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