Registry 8x Series V8 Swaps (31 Viewers)

[tmxmotorsports]

I agree with the Toyota ac fan but mainly for stopped traffic for ac purposes I'm sure it would help a little for slow wheeling. @jdmblingn I'd start with your open air box first change one thing at a time.
@NeverFinis great tech information as usual dude.

 

[FlyinFaded]

This is some great info.

I've been chasing temp issues with my swap, but in a different way than most seem to run into here.

I have an iron block LQ9, w/ a stroker kit, cam, and associated bolt on stuff. It's not a racecar, but a bit more than stock. Using an oem LC radiator, a GM mechanical Fan, and a custom fan shroud. Around town, on the highway, even towing a little trailer from Oregon to Colorado, it stays right at about 210. AC, driving it hard, nothing really bothers it. In traffic it will start to creep up a bit, but if you're moving, it comes back down pretty quick.

My issue is when wheeling, in low speed crawling scenarios it creeps up, if you get the engine speed over 2k or so, it'll cool it off pretty quickly. I've seen up to 230 or so in this scenario and as most of you have mentioned, I'm also not happy with it running that hot. It also heat soaks the intake pretty bad (open cone filter, I know...) But I can't imagine that's the only thing contributing to this issue. Especially since my IAT drops significantly again once moving at a reasonable pace.

My thought here was to switch to electric fans to overcome the cooling it needs under 1500 rpm with heavy load in these conditions. Am I way off base here? Is there another issue that I'm missing?

I don’t think you’re way off base. All of my Chevy trucks I’ve owned run at around 210. So you’re fine there. But it make sense your temp goes up when crawling. I had that issue with my stock 1fz motor and I replaced my hydraulic fan clutch and it corrected itself. Only ever did it when I was out crawling around in the desert on a hot day after I replaced it. But that is the scenario where an electric fan is going to be better because of traffic and slow speeds.

 

[White Stripe]

I had the same low speed temperature issue with the mechanical fan.

 

[Tinkertoy]

Just some notes on a recent road trip.

Horsepower​

I happened to look at the Scangauge II as I was accelerating merging into traffic and I saw 387 HP.

I don't think it was floored (probably nearly), or nor did I run it to max rpm.

It is pulling info from the ECM, which needs to know for 6l90e torque management.

Cooling​

I was also stuck in a traffic jam for nearly 2 hours yesterday. It was over 90°F, running A/C full blast the entire time. Ice cold...

During this, engine temp ranged from 193°F to 207°F. Mechanical Fan.

I have read that 210°F is what GM designed to run the motor at for emission reasons and other people have confirmed that is where a LS makes the most power.

Putting in lower temp thermostats in is no bueno.

Electric Fans​

Really hard to find primary information on stock electric fan cooling. Most are parroting what others have written.

Found this electric fan profile graph for a stock 2012 5.3 Silverado. Source

View attachment 3944065

As you can see. Even GM doesn't go 100% fan until 239°F!

These motors can take some heat!

However, I wouldn't be ok with hitting 239°F, with A/C off, like @Tinkertoy did with his electric fan setup.

BTW, I believe the ECM will stop A/C if the engine gets too hot, assuming one did the swap correctly with having the ECM in the A/C control loop. I have to check hp tuners to see what engine temp does the A/C stops running....

Thanks for the recap. I actuyally never had the AC on. No AC in the truck currently. Part of my problem was on the way down to Oregon, I had just flashed the stock tune back in the rig with some changes, but I didn't check the Fans on the tune. (More dumb sh!t I do.). Melted a connector for one fan and the other fan couldn't keep up. Once I got to Oregon. I was able to rewire the fans and I adjusted the tune. My fans start coming on at 195. I also believe I have some heat soaking going on. (Not ready to cut the hood.)

While in Oregon met up with Delta and Solve Function and picked up the hood risers. They def helped, but I also had removed my trans cooler and oil cooler. since my first swap.

I am going to toss the Derale fans back in and add the oil cooler and trans cooler back and try that out. If that doesn't work, I will go back to mechanical...Half the battle with Efans is not knowing if they are on. Well...not true the Derale fans are loud AF.

 

[mattnandie]

Figured I might add this here:

Project "Sparkles"-1997 LX450 Gen V 6.2 Swap

After reading this post skit to #24. #2-#23 are full of confusing info as I was in the process of deciding what I was going to do. Sorry I'm starting this thread to document the parts, costs and work done, as fully as possible. Ill be adding info as I go along. Im doing all work myself except...

forum.ih8mud.com

 

[LT]

I have a couple questions for my upcoming L96/4L80e swap.

Has anyone integrated the 4L80e NSS/Reverse lights into the factory harness? If so, which wires did you hook up on the Toyota side? As far as I've seen from ls1tech there are 5 wires on the module to get NSS and Reverse to work. I would rather go this route than having to integrate the Dakota Digital Box.

Also on the 4L80e shifter position module, it has the ability to send signals for PRNDL to the cluster gauge. Has anyone successfully done this?

Last question, regarding AN fittings. On the return fuel line going back to the tank, will the AN compression fitting with a 5/16 ferrule be able to clamp down enough to seal on to the line or would it be worth converting the ferrule to an 8mm? Redhorse Performance 3000-06-05-2 Redhorse Performance 3000 Series AN Tube Adapter Fittings | Summit Racing - https://www.summitracing.com/parts/hse-3000-06-05-2

 

[NeverFinis]

I have a couple questions for my upcoming L96/4L80e swap.

Has anyone integrated the 4L80e NSS/Reverse lights into the factory harness? If so, which wires did you hook up on the Toyota side? As far as I've seen from ls1tech there are 5 wires on the module to get NSS and Reverse to work. I would rather go this route than having to integrate the Dakota Digital Box.

Also on the 4L80e shifter position module, it has the ability to send signals for PRNDL to the cluster gauge. Has anyone successfully done this?

Last question, regarding AN fittings. On the return fuel line going back to the tank, will the AN compression fitting with a 5/16 ferrule be able to clamp down enough to seal on to the line or would it be worth converting the ferrule to an 8mm? Redhorse Performance 3000-06-05-2 Redhorse Performance 3000 Series AN Tube Adapter Fittings | Summit Racing - https://www.summitracing.com/parts/hse-3000-06-05-2

I can only answer the last one since I have a 6L90e. Return line just needs a basic spring clamp. It isn't under high pressure.