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HybridZ

Need help keeping cool...


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  • 1 month later...
Guest Nic-Rebel450CA
If your car can't keep cool with a standard sized radiator and known good fan, then you have something else wrong.

 

Havent seen truer words. :-D

 

A common cause of "overheating" when cooling equipment should be sufficient is what is going on in the combustion chambers. Double-check your timing and air/fuel mixture. (Make sure you are not too lean)

 

Air flow has a lot to do with the cooling efficiency of the engine. If the radiator is not tight to the frame around it and the fan is not shrouded then air will tend to flow around the radiator rather than through it.

 

Probably not as likely to be your problem if you are having trouble with heating up at idle as the only air movement (other than wind conditions) is going to be what the fan is moving.

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Aha!...Bigger pump...more flow...This solves nothing because the system simply cannot cool faster because the water is flowing more.

 

Yes and no. Most heat exchanges have a peak flowrate for efficient cooling (or heating) and higher or lower flow rates will drop this efficiency. So, if you go to a radiator with a bigger core size, you may need more flow, or you may need less flow. Depends on the radiator design.

 

Proper ducting is of huge importance at high and low rpm if you are generating more heat than usual. However, I can't think of many instances where a Z with a properly functioning cooling system would need more core frontal area.

 

Like its been said, if you've tried everything and its still running hot, check out your tuning.

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