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Overheat problem... need ideas
well here we go again... did a little bit of work to the LB9 after a catastrophic failure of my 355. I threw together a modified LB9 cam, heads, mild tune. Now all it wants to do is overheat. But only when I get on it. It normally runs cool at 190 until you go above 3500. Its got a new t-stat, hoses, water pump, took out the heater core for the summer. The radiator isn't the stock GTA Aluminum, its the Steel stock one i had from another car. Would that cause it to not keep it cool?
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1988 Pontiac Trans Am GTA - Five UhOh Power
305 LB9 TPI -500/510 Cam, Ported Heads, 24# Inj Shorty Headers, TruDual Exhaust, MagnaFlow Mufflers, T-5 Swap, LT1 10 Bolt, Lowered 2.5in. 1991 Pontiac Firebird Formula - Nightmare Project 
2003 International 4300 - DT466 A5, Jerrdan 21' Rollback, Shiny Simulators.. Bling Bling Rattle Box
- iLLmINDED oNE -
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