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Re: 95 G30 Tow Project.
Don_F #750408 July 08th 2019 8:18 pm
Joined: Apr 2016
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I gave the van a real towing test a few months ago. I got called to tow the dyno to a small town in middle Oregon. Only about 80 miles each way but its in old volcano areas. The highway is straight up and down. The engine torque from the upgrades is noticeable it did fine. I went over the truck scales at very close to 10,000 lbs total. The problem was the trans temp. I had to let off on the steepest parts as the temps were going to cook the trans. I had the factory trans cooler as an option. One person told me there is a bypass built in and its a poor design. After many miles the bypass tubes work better than the other tubes and not much cooling gets done. I sourced another cooler from TruCool. They made the original too, but this one is twice as thick and has no bypass so it all has to go through the cooler. B&M Supercoolers are re boxed Tru-Cool coolers. I went with the Tru-cool box since it was less than half price. It was pretty easy. Since the same manufacture one side of the bracket was perfect, the other side needed a square piece of sheet metal. I had to trim the grill a bit from the backside because of the extra thickness. I have not pushed the trans that hard locally but it seems to cool better. There is one area where the factory add on trans cooler line has a necked down area to slide into the main cooler line. I think that may hurt cooling as well. I have not cut that out yet but will if trans temp continues to be a problem

[Linked Image]

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Re: 95 G30 Tow Project.
Don_F #750409 July 08th 2019 8:26 pm
Joined: Jan 2014
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Lookin' good! cheers


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Re: 95 G30 Tow Project.
Don_F #750702 July 17th 2019 10:42 am
Joined: Apr 2016
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I set up the dyno in my driveway on Sunday. Just to fine tune the fuel tables a bit. My neighbors are mostly nice about it as long as I don't do it too often. The second picture is last years beginning pull with an open air cleaner and the under drive pulley. Compared to the Vortec head swap, tiny 196 duration roller cam, and better exhaust system. It still uses the TBI and the stock exhaust manifolds. Its still a truck engine, it runs out of breath about 4000 rpm but the huge increase in torque over the stock engine helps a lot when pulling 10,000 lbs of van, trailer and dyno around. There is some differences between the runs, In the last runs I locked the converter early and locked it in gear to prevent the converter from locking mid run. I also used a mathematical ratio to figure rpm and its slightly off. Its not a big deal, but its a difference when comparing the two. Mostly the runs where to dial in the fuel table, for that you just need load and a wideband. The runs were just for information at the end of the work.

[Linked Image]
[Linked Image]

Last edited by Don_F; July 17th 2019 10:43 am.
Re: 95 G30 Tow Project.
Don_F #750768 July 20th 2019 10:13 am
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Definitely a healthier pull. Awesome work man.


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Re: 95 G30 Tow Project.
Don_F #750791 July 20th 2019 8:18 pm
Joined: Nov 2013
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Looks great Don! Nice work. Wish you were here in Michigan...I'd set you loose on the TBI 305 (L03) in my Trans Am.

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