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Signal 2 · 06-29-2009, 08:40 PM

Possible. But I personally have never heard of this before. Is it possible that going up hill your simply loading the engine and/or loosing some head-wind you had on level ground? And 215 F. is not unheard of with a triple digit ambient temps and high engine load.
Running your car with the stock WP pulley and no airpump isn't a good idea, but unless there's evidence of severe slippage...worn/shiny belt face and noise, it's probably not soley responsible either. In my experience, slippage is usually during cold start, quick acceleration and high rpm. Since you mentioned you recently added those mods from stock, other things that might have influenced the change.....
*Your coolant to water ratios were changed?
*Some air was left in the system?
*Did you fill the gaps around your radiator with foam?
*Your belly-pan isn't completely secure?
*Making sure your relays are working properly, the connectors are secure and fans are coming on as they should?

On a side note you could also consider....
*Install of an FC (IIRC 89 to 91) thermoswitch to lower threshold temp for fans to come on
*Adding the airpump idler pulley to keep full belt contact (Garfinkle and Chadwick both sell them here as authorized vendors)
*Redline Water Wetter

06-29-2009, 08:40 PM	#3
Signal 2 Viable Fossil Join Date: Mar 2008 Location: Mid-West Posts: 199 Rep Power: 18	Possible. But I personally have never heard of this before. Is it possible that going up hill your simply loading the engine and/or loosing some head-wind you had on level ground? And 215 F. is not unheard of with a triple digit ambient temps and high engine load. Running your car with the stock WP pulley and no airpump isn't a good idea, but unless there's evidence of severe slippage...worn/shiny belt face and noise, it's probably not soley responsible either. In my experience, slippage is usually during cold start, quick acceleration and high rpm. Since you mentioned you recently added those mods from stock, other things that might have influenced the change..... Your coolant to water ratios were changed? Some air was left in the system? Did you fill the gaps around your radiator with foam? Your belly-pan isn't completely secure? Making sure your relays are working properly, the connectors are secure and fans are coming on as they should? On a side note you could also consider.... Install of an FC (IIRC 89 to 91) thermoswitch to lower threshold temp for fans to come on Adding the airpump idler pulley to keep full belt contact (Garfinkle and Chadwick both sell them here as authorized vendors) Redline Water Wetter __________________ Jim VR R1 FD Last edited by Signal 2; 06-29-2009 at 08:46 PM.