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What did you do with your H3 recently? NEW

fanugy

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150
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Phoenix, AZ
That was an easy adjustment with HP tuners. Runs good now without a good tune and seriously powered down. Should scream tonight.


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fanugy

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150
Location
Phoenix, AZ
Also, used a guy off the SS forum who specializes in camels out of Vegas. Very similar cam to what came in the SS Trailblazer.


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amrg

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So technically looking at 400 hp/tq? Why a higher stall then? You should idle at a stock-ish rpm (600-700)

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fanugy

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150
Location
Phoenix, AZ
The LS2 is a high RPM motor. The cam helps with moving that to suitable SUV range. The stall allows the engine to build Rpm faster before applying to vehicle. Idles at about 750 now, stall converter around 2500. So, foot on brake and it will want to jump at about 2500 rpm instead of idling into power, if I understand correctly.


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rascole

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2,850
Location
Bellflower, CA
The LS2 is a high RPM motor. The cam helps with moving that to suitable SUV range. The stall allows the engine to build Rpm faster before applying to vehicle. Idles at about 750 now, stall converter around 2500. So, foot on brake and it will want to jump at about 2500 rpm instead of idling into power, if I understand correctly.


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I maybe wrong but isn't that the opposite of what you want in a 4X4? High stall means too many RPM when trying to climb obstacles, the stuff breaks when the converter locks up right?
 

amrg

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A higher stall makes the engine rev more before engine and trans lock up completely and move as one. Basically rev the engine into the power band, since a cammed engine makes power higher in the rpm.
The I5 has a 2600 rpm stall, the alpha has a 1600 stall

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humvee

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507
Location
Doha, Qatar
Valet ruined my weekend
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Bowser-II

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270
Location
Hagerstown, Maryland
Well it’s time to replace the radiator and add a transmission cooler. It looks like the fluids did not mix and crack and leak in the radiator just started. There is no milky color in the transmission fluid or the engine coolant.

What are the chances of flushing the systems being okay and good enough at this point?

Since I plan to use an external transmission cooler can I use the manual transmission radiator?




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amrg

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37s!!!
Helps justifying a move to an alpha in the future!!!

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scoreh3

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1,024
Location
SoCal
Packed up the 3 and trailer and took a bunch of toys to the American Adventurist's Toys for Tots toy drive at Camp Pendleton. Great event and great group of off-road folks. And a BIG THANKS to the Marines and all they do to keep us safe.
 

Schwarttzy

Sponsor
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1,390
Location
Rockford IL
A higher stall makes the engine rev more before engine and trans lock up completely and move as one. Basically rev the engine into the power band, since a cammed engine makes power higher in the rpm.
The I5 has a 2600 rpm stall, the alpha has a 1600 stall

For off-road, a low stall torque converter is better than a higher, especially with rock crawling.
 

Schwarttzy

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Rockford IL
I maybe wrong but isn't that the opposite of what you want in a 4X4? High stall means too many RPM when trying to climb obstacles, the stuff breaks when the converter locks up right?

The reason for wanting a low stall converter doesn't have to do with breaking stuff. Just the needs for off-road have different demand when locking out sooner would be better.
 

amrg

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Its more than that but a lower stall sure helps controlling such situations.
My H3 idles at 800 rpms due to the cam, with a stock stall it just wasnt stopping and the brakes were getting alot of abuse. Im running a 3200 rpm stall and this makes it friendly as a daily driver. But mileage suffers and sure there will be more trans heat happening (so i upped the trans cooler)

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4speedfunk

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4,250
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Tardville
CaseyS’s diesel in low range is an absolute monster!!! Takes two feet on the brake pedal to keep it from “going”.


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Enter Hummer

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Messages
244
Location
Southwest
Well it’s time to replace the radiator and add a transmission cooler. It looks like the fluids did not mix and crack and leak in the radiator just started. There is no milky color in the transmission fluid or the engine coolant.

What are the chances of flushing the systems being okay and good enough at this point?

Since I plan to use an external transmission cooler can I use the manual transmission radiator?




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Well, if they didn’t mix you should be ok (hopefully you haven’t drove it since). I say flush it and see what happens, it would be cheaper than replacing parts. As for the manual radiator, I don’t know.
 

amrg

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Get the manual as you end up with slightly more cooling capacity and zero risk of inner failure of the radiator (even if there is nothing to mix with)

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JPaul

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2,436
Location
Way up north, UT
Well it’s time to replace the radiator and add a transmission cooler. It looks like the fluids did not mix and crack and leak in the radiator just started. There is no milky color in the transmission fluid or the engine coolant.

What are the chances of flushing the systems being okay and good enough at this point?

Since I plan to use an external transmission cooler can I use the manual transmission radiator?




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It's pretty obvious when coolant and lubricant mix (milkshake vs a soda) and it doesn't take long at all for that to happen, so if both fluids look normal then you're fine. The transmission fluid will rise to the top of the radiator, and the transmission fluid cycles through the transmission pretty quickly so it's not like coolant will be hiding in there, especially if you drop the pan.
 
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