68 Barracuda 440 getting hot in traffic
Why not overdrive the pump? Almost every factory pump was over driven. Flow is everything.
Overdrive the pump.
Nope. Only factory AC cars were overdriven. Everything else was .95:1. So most factory cars were slightly under driven because “most” of them weren’t AC cars. The ratio’s are in the FSM excerpt I posted on the first page.
We don’t even know his current pulley diameters anyway, so we don’t know if he’s already overdriving the pump or not.
The cooling system isn’t just one part, it’s everything working together. Look at the factory set ups, the overdriven pulley set (1.4:1) on the AC cars ran a water pump with fewer blades (6). The .95:1 pulley set up ran an 8 bladed pump. Just spinning the impeller faster isn’t necessarily better if it wasn’t designed for optimal flow at that speed. Why did the factory reduce the number of blades on the water pump for the cars with the overdriven pulleys?
Air flow is more likely to be his issue anyway with his symptoms. Yes, over driving the pump overdrives the fan too. But the fan blades are also optimized for a specific rpm range, just upping the rpms on the fan does not absolutely guarantee it’ll move more air.
You want the fan and pump spinning at the rpms they were designed for. Arbitrarily overdriving either because you can’t figure out what’s actually wrong isn’t a good solution. Plus, overdriving the fan and pump will steal more horsepower to drive them.
Very Nice ride!
Anything can be made to fit and work. That said, is it worth it in the long run and right for your car? Think twice and cut once as it can effect many things. These do not grow on trees and once cut is harder to put back. I know this matters to few anymore but to some it does! I ran an oversized radiator for many years and it never panned out.
I resisted the cutting and glad today I did. Find an 033 in new shape and run all the standard BB equipment no exceptions and you will be happy. A little creep is really not an issue! JMO!
There’s no need for the OP to cut anything, already covered that. Just because you couldn’t figure it out doesn’t mean it won’t work.
And a larger radiator is only one part of the cooling system. A big radiator won’t solve every cooling problem, everything has to work together. The OP’s system is working well everywhere but idle. That points more to an airflow problem, not a radiator issue.
The OP’s fan shroud has large gaps, and all the air pulled around the shroud and through those gaps is air that’s not going through the core.
