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2000mc · 10-21-2019, 08:46 PM

I’d bet the main restriction is the cooler(s). 3/8 or 3/4 lines might see almost the same pressure and flow.
If you did flow more, I would think it would be maintained at the same pressure, and actually increase the load. You would also be warming up more fluid, and increasing vehicle weight. Probably going to cost you 0.00021mpg
I would think the factory setup would be the most reliable, unless they have to be modified to use.
It may be slightly easier to route and secure smaller lines.

10-21-2019, 08:46 PM	#4 (permalink)
2000mc herp derp Apprentice Join Date: Oct 2008 Location: Lawrence, KS Posts: 1,049 Saturn-sold - '99 saturn sc1 Team Saturn 90 day: 28.28 mpg (US) Yukon - '03 GMC Yukon Denali 90 day: 13.74 mpg (US) Thanks: 43 Thanked 331 Times in 233 Posts	I’d bet the main restriction is the cooler(s). 3/8 or 3/4 lines might see almost the same pressure and flow. If you did flow more, I would think it would be maintained at the same pressure, and actually increase the load. You would also be warming up more fluid, and increasing vehicle weight. Probably going to cost you 0.00021mpg I would think the factory setup would be the most reliable, unless they have to be modified to use. It may be slightly easier to route and secure smaller lines.