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Old Jan 11, 2026 | 08:26 PM
  #1201  
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Originally Posted by F350towing
Looks like I’ll be going trombetta for 1/3 the price of the stancor.
This the one I put in mine. Same # BWST listed. Been in my truck since 22 with no issues.

https://www.amazon.com/dp/B007W2NCMC?ref=nav_youraccount_switchacct&ref_=cm_sw_r_cso_cp_apan_dp_9A37KSV4P71RKAYT8DDK&social_share=cm_sw_r_cso_cp_apan_dp_9A37KSV4P71RKAYT8DDK https://www.amazon.com/dp/B007W2NCMC?ref=nav_youraccount_switchacct&ref_=cm_sw_r_cso_cp_apan_dp_9A37KSV4P71RKAYT8DDK&social_share=cm_sw_r_cso_cp_apan_dp_9A37KSV4P71RKAYT8DDK
 
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Old Jan 11, 2026 | 10:37 PM
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Wow. Stuff happened while I was away.
 
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Old Jan 11, 2026 | 10:51 PM
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Originally Posted by FordTruckNoob
Wow. Stuff happened while I was away.

https://youtu.be/yahBtp_1jWE?si=Ub9pTOCIeNXyi-u4


at least the first few seconds of the clip.

 

Last edited by F350towing; Jan 11, 2026 at 10:53 PM.
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Old Jan 12, 2026 | 11:01 AM
  #1204  
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Something interesting as I did more digging into the trombetta GPR relay.

They actually have a builder sheet where you can change the mounting plate, duty cycle and voltage.

https://650659.app.netsuite.com/core...2cd24&_xt=.pdf

684-1251-012 is what I’m looking at.

Amazon Amazon

The 012 represents 100% duty cycle.

Wouldn’t the 100% duty cycle be more robust than the 212 = 25%.

Thoughts from the brain trust knowledge of FTE.

 
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Old Jan 12, 2026 | 12:12 PM
  #1205  
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You would think so but electricity works in mysterious ways.
 
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Old Jan 12, 2026 | 10:05 PM
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I remember a discussion on that exact topic a while back. There was a chart from trombetta that showed the 25% duty one was still double or triple the amount of time the glow plugs stay on for. Either one would suffice imo.
 
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Old Jan 13, 2026 | 12:14 AM
  #1207  
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100% DC is on order.
 
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Old Jan 13, 2026 | 08:52 AM
  #1208  
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Originally Posted by F350towing
100% DC is on order.
There you go. I plan to replace my Stancor with a Trombetta when it eventually dies. My fender-mounted start relay is a Trombetta already. It is the version that grounds through the base.
 

Last edited by FordTruckNoob; Jan 13, 2026 at 09:03 AM.
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Old Jan 15, 2026 | 11:38 PM
  #1209  
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The trombetta 684-1251-012 arrived today.

The mounting ears are quite narrow centre to centre. I would have to use fender washers to hold it in place, or drill new holes for rivet nuts. I don’t want it to look janky.

On order is the 684-1271-012 which is the long flat L-bracket. Hopefully this one will fit with the current mounting bolt locations. If not then some modifications will be required.
 
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Old Jan 17, 2026 | 08:42 PM
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Originally Posted by F350towing
For some reason the gpr circuit isn’t working. No glow plugs so an extended crank time. I will dig into that later today. GPR Relay.

Had some exhaust smoke coming from under the hood. At first I thought it was electrical, since I just wired in those relays, but a quick smell and it was exhaust.
Pulled the V-band clamp today. Two of the 3 part clamp I could remove by hand. Only the bottom was really seated, and the clamp nut wasn’t really tight.

I’ve reinstalled the clamp and cranked it down tight. Fired the truck and let it heat for about 15 minutes. High idle got the EGT up to 400° then went back and got another 4 turns on the clamp.

Going to check it tomorrow with a non glow plug cold start and see it that’s cleared up the problem.
 
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Old Jan 18, 2026 | 11:28 AM
  #1211  
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Originally Posted by F350towing
Pulled the V-band clamp today. Two of the 3 part clamp I could remove by hand. Only the bottom was really seated, and the clamp nut wasn’t really tight.

I’ve reinstalled the clamp and cranked it down tight. Fired the truck and let it heat for about 15 minutes. High idle got the EGT up to 400° then went back and got another 4 turns on the clamp.

Going to check it tomorrow with a non glow plug cold start and see it that’s cleared up the problem.
Cold start completed. -2°c =28.4 °F and maybe 2 seconds crank for it to light without the glow plugs. No smoke from under hood but a fair bit out the tailpipe.

Vband clamp on the babies butt was the problem. I don’t have to pull the turbo to check all the bolts since that would have been the next step.

Makes me wonder how much drive pressure I was bleeding off.

Fuel pressure still on the high side of 70’s.
 
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Old Jan 23, 2026 | 09:47 AM
  #1212  
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Comparing the two trombetta relays side by side.

One made in Mexico the other made in China.



Anybody who has installed one of these do you remember if yours was stamped on the bottom?

The China is stamped, Mexico is not. China has a thicker steel for bottom and mounting plate than the Mexico.

Mexico sold by MurCal.
China sold by Amazon.
 
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Old Jan 23, 2026 | 10:54 AM
  #1213  
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Only one way to find out which is better: destructive testing.

Run 24VDC 50A through it switching at 5Hz then see which one dies first.
 
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Old Jan 26, 2026 | 12:11 AM
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And hold them both to see which gets hot first.

Just kidding.
 
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