What did you do with your GMT400 today...or yesterday....

[jrsavoie]

Door sticker says 245/75R/16s
With the 285/75R/16s I had to turn the torsion bars way up to keep the 285s from rubbing on the back corner of the fender wells.
I’m afraid that the 265s would do the same.
I want to get the ride height back down to stock.
Plus, narrower tire makes for better traction too.

235/85s are the same height as the 265/75s

 

[MrMarty51]

New tires.
After the weather warms probably pull wheels, mask off tires then darken the wheels some.

 

[Big T]

Replaced rear sway bar bushings on the 2014 4Runner before it leaves for Montana tomorrow. That truck is running nice and tight and the mileage returned to normal after replacing the MAF sensor.

Doing some planning and I will head up to Montana 3/20 and 3/21 for 3 weeks. Will be hauling my stainless work tables/cabinets. Measured up and I will pull the 2nd row seat and place the bench part on top of the cabinet, which will allow the cabinet to slide in far enough for the barn doors to close.

 

[Will L.]

@Big T you are forever using that rig like a truck w/ a shell on it. I’m surprised you don’t leave the back seat out most the time.

 

[Big T]

@Big T you are forever using that rig like a truck w/ a shell on it. I’m surprised you don’t leave the back seat out most the time.

It is very functional, which is why I love them. A truck with second row seating, but a 6.5’ bed is just not as good. 8’ bed makes that truck unwieldy.

 

[jrsavoie]

It is very functional, which is why I love them. A truck with second row seating, but a 6.5’ bed is just not as good. 8’ bed makes that truck unwieldy.

We really miss our Suburbans. The Lexus isn't going to be the same

 

[Big T]

It is very functional, which is why I love them. A truck with second row seating, but a 6.5’ bed is just not as good. 8’ bed makes that truck unwieldy.

90% of the time, the Suburban is being used as a two row SUV. When you need it, it’s a truck. A truck is always a truck, but the usage as a truck would be the same.

 

[SnowDrift]

The 130gpm pump (both the early design and the later balanced flow) and the dual thermostat crossover were engineered to work TOGETHER to flow more coolant and thus carry more heat away from the engine to the radiator to be shed!

The "single is better than dual" is an argument of apples to oranges of which is better to warm up the engine to operating temperature, NOT which one flows better! This "better" argument is due to the single having the bypass blockoff feature that recirculates coolant back into the engine to warm the engine up faster until the thermostat opens which the factory dual doesn't, which has been "fixed" with the dual thermostat by several aftermarket vendors.

For MAXIMUM coolant flow with the 130gpm water pump you MUST use the higher flowing dual thermostat crossover it was designed to work with! The ONLY exception would be to use the rare, transition design 96 LARGE stat single stat crossover.


Think of it this way. You just pulled the original straight 6 out of your 67 Chevy Nova and dropped a built 383 stroker into it. Would you still run the 383 into the original factory 1½" single exhaust pipe that the 6 used, or would you put on a 2¼" dual exhaust system so that 383 could breathe freely? Same thing with running the 94-95 single stat crossover with a 130gpm water pump. You're choking the pump down and not getting maximum performance from the pump's ability to move more coolant and thus remove more heat from the engine and take it to the radiator to be shed.

@dbrannon79 yes it would. Around town you're not producing as many BTUs of HEAT (do not confuse with temperature) from your engine because you're idling at stoplights, and are generally running at lower rpms overall at 35-40 around town in stop and go, than when running out on the hiway at a continual 2400rpm for longer periods and producing way more HEAT in the engine than the choked down flow of coolant can remove from the engine and take to the radiator to have the heat removed.

Is there any flow data to support this on the dual crossover?

 

[Will L.]

Gonna disagree about the dual vs single from experience.
Having the block off thermostat is huge! But hummers use a single thermostat that is not a block off style and i tried it vs a dual stat and the single helped there also but very minimal.
Once I he block off is in place - huge improvements

The waterpump is an impeller not propeller meaning it is not a positive displacement pump. For years many argued the one t-stat would restrict over all flow and increase pressure by doing it and sighting boyles law. False because impeller.

A task most wont do, but I did.
Take empty 30 gallon trash can and rig the upper hose off the radiator and into the can. Supply garden hose to the radiator loose not under pressure. Start it up and time it.
Swap crossovers and time it.

You can measure tstat open are and do math but 100% flow through a hole ever so smaller than two holes slightly larger but a GAPING UNRESTRICTED HOLE recirculating coolant to the suction side of the waterpump…

The rare crossover is a problem in finding. Hence my happiness for myself and others who read my signature and follow the link- to which I hold no affiliations.