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- - Crash's 69 K10 (https://67-72chevytrucks.com/vboard/showthread.php?t=494599)

Re: Crash's 72 K10

Quote:

Originally Posted by fakerwade (Post 5149859)

Nothing too major,,, it's been a while since I worked for GM so things may have changed. First thing that jumped out on me was that the fuel pump relay was activated by sending power from the PCM to the relay, usually that leg of a fuel pump relay has "key on" power and the relay is activated by the PCM closing the ground to the ground leg of the relay. The second thing was the use of a 20 amp fuse to the PCM through the "hot all the time" side of the fuse box. That power feed to the PCM is simply for memory retention and requires very little amperage to maintain. The 10 amp fuse should probably go there and the 20 amp fuse should go to the "key on" side of the fuse box for the actual power up of the PCM. Like I said, I may be wrong, glad to hear you got it running!! ;)

Thanks fakerwade.... I could very well have things wrong.. However, in this case I think I am right. After review the wiring diagrams and the fuse box itself the orange wires (Blue Pin 20 and Pin 57 - Circuit 440) uses a 20 amp fuse. I agree it seems large for memory retention as well.. But I thought it best to follow what the factory did.

On the fuel pump, I was surprised with that as well.. The fans circuits work by the PCM taking the pins to ground. However, the fuel pump outputs 12V+.. Not sure why they did it that way...

Once again thanks... and please let me know if you spot any other issues..

Re: Crash's 72 K10

Quote:

Originally Posted by Crash_OK (Post 5149762)

It's alive...!!!!!!!!!!!!!!! Hooked up the PCM. powered up the fuse panel.. hit the starter.. started right up.... sounds good..

Congrats on getting it running! You know we'll need to see some video.
Amazing how fast you got the chassis done and motor running. It took me a solid year. As soon as fishing weather hits I usually stop or slow to crawl. I'm going to try to stay hooked up this year just to try to keep up with you;)

Re: Crash's 72 K10

Quote:

Originally Posted by mcbassin (Post 5150692)

Thanks Mike.. As I have said before... My progress is about to slow way down... I need to start on the cab next week, but I keep looking around for other things to work on :lol: You made that rust on your cab disappear pretty fast.. and made it look easy...

Re: Crash's 72 K10

Nothing like an LS engine! After swapping in the 6.0 in my Camaro I would never look back at using the SBC. I will however use the SBC thats in my 72 truck since I really dont want to spend a great deal of money on another swap. Awesome you got the harness figured out and you have it running. I chose the path of least resistance and bought a stand alone harness for the Camaro. Great job and thanks again for all of the information!!!

Re: Crash's 72 K10

Wow amazing build. You OK guys sure know how to build them. Looking forward to seeing more

Re: Crash's 72 K10

Quote:

Originally Posted by tsnow678 (Post 5151406)

The wiring was not bad.. in fact I enjoyed it.. Maybe someday I will start a business doing it.. Thanks for the commets.. I think my next project will be a 1st gen Camaro... Have a great day.

Re: Crash's 72 K10

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Originally Posted by 68 Four on the Floor (Post 5151462)

Wow amazing build. You OK guys sure know how to build them. Looking forward to seeing more

Thanks..

Re: Crash's 72 K10

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Originally Posted by m6z (Post 5156515)

nice work

Thank you...

Re: Crash's 72 K10

Re: Crash's 72 K10

Quote:

Originally Posted by Crash_OK (Post 5158660)

Update from last weekend.. Built a driver’s side battery box out of what I had on hand.. I am not super happy with it, but it is functionally, and does not look that bad. It did fit well, and is very stable.

Then I fired the engine up.. started instantly.. I used the Scan Gauge out of my Tundra to look for PCM codes and to monitor water temp, loop mode, and RPM.
I had my lovely, wonderful, wife record the engine startup… Seems she could not keep the camera off of me.. Can’t say I blame her.. :lol: But she did get some pictures of it running. The audio is terrible on the cheap camera we were using the engine was much more quite than this video depicts.

Hey Mark, nice work on the battery box. It looks right at home to me. I'm digging the video too. I really want to know how to hook up one of those for my project(s). Keep up the hard work :chevy:

Re: Crash's 72 K10

Quote:

Originally Posted by mcbassin (Post 5159022)

Hey Mark, nice work on the battery box. It looks right at home to me. I'm digging the video too. I really want to know how to hook up one of those for my project(s). Keep up the hard work :chevy:

Thanks Mike.. The welds need improvement.. The battery tray was rusted out in a coupe of places.. I patched those, but there is still some pitting. The PO used a 1973 - 80 battery tray.. it worked out well moved to the drivers sde.

What is it you want to know how to hook up?

Re: Crash's 72 K10

Got the cab moved to the shop.. I will find a different method to unload cabs by myself in the future. The cab flipped 90 degrees on me.. it was not pretty.. but I finally got it back in the right position.

I tilted the cab up to start on the cleanup of the floor tomorrow.

http://i284.photobucket.com/albums/l...t/P2020265.jpg
http://i284.photobucket.com/albums/l...t/P2020266.jpg

I also position the LS1 fan setup into place.. I will also work on getting a mounting system setup tomorrow.

http://i284.photobucket.com/albums/l...t/P2020267.jpg
http://i284.photobucket.com/albums/l...t/P2020268.jpg

Re: Crash's 72 K10

OUCH! That sucks, hope you didn't get tweaked in the tip over. Or make some new dents:(. Looking forward to the LS fan setup details.

Re: Crash's 72 K10

Quote:

Originally Posted by mcbassin (Post 5163311)

OUCH! That sucks, hope you didn't get tweaked in the tip over. Or make some new dents:(. Looking forward to the LS fan setup details.

There was some tweaking and some new dents.. but not a big... small problems compared to some... I loaded the old cab this morning in about 5 minutes..

Re: Crash's 72 K10

Re: Crash's 72 K10

Good work on the fan mount Mark. You're gonna have to show me how you wired that setup. I'm assuming you are monitoring the engine temp with your scan tool.

That looks like some 1/8X1" aluminum angle. I have crap load of that stuff in a corner somewhere in my piled shop I would have been glad to give you some. Too bad that cab needs so much attention. I just got finished for the night on mine, it was a long battle. I'll give you a hand with if iI can.

Re: Crash's 72 K10

Quote:

Originally Posted by mcbassin (Post 5165369)

Thanks Mike.. I have it all documented.. should not have any problems.. The fan setup works really nice, I am glad I went this way instead of the mechanical fan.
I had the angle piece laying around.. it worked out well.

No problem on the cab.. 40 year old stuff is going to have rust.. I am still debating on which cab to use.. And I will take all the help I can get… so if you every get bored and want to make a trip to Eufaula I will be there..

Hope all is going well on your cab....

Re: Crash's 72 K10

Re: Crash's 72 K10

WOW! That thing sure looks different after you shot it with sand (black diamond). It all looks so familiar for some reason. It's really not too bad, it's just time consuming. I know I was really glad to get the cleaning stage that you did today done.

Re: Crash's 72 K10

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Originally Posted by mcbassin (Post 5167343)

X2 ,,,,,,,,time consuming,, (hate rust!!!) :barf:

Re: Crash's 72 K10

Quote:

Originally Posted by mcbassin (Post 5167343)

Now that I know how bad it is.. I know what I need to do to fix... All it takes is time and money... :-)

Re: Crash's 72 K10

Quote:

Originally Posted by fakerwade (Post 5167366)

X2 ,,,,,,,,time consuming,, (hate rust!!!) :barf:

X4... I hate rust more today then I did yesterday...

Re: Crash's 72 K10

I cant say how much this thread is going to help me in the near future!!! Seems your truck and mine have the same issues in the cab. The .030" wire should be fine, the .024" would be better but I am sure you will find the sweet spot on wire speed. Keep the pics coming as I am sure there are a ton of us like you out there that will be doing the same fixes. Thanks!!!