Has anyone ever made their own fuel pin? I don't want to grind my stock one and I don't have the extra $200 for one. It can't be that hard to machine one. I can do all of that myself and get it heat treated. I just don't know any dimensions. Any help? Thanks in advance.

Jake

 

If you were to use a micrometer on the one that's in your pump right now then it could be done. I made on out with an old head bolt on one of my old pumps. Worked out well. But no dimensions were written down while doing it. Good Luck!

 

$200.00 no, more like $110.00

 

dude cut your own with a small die grinder.

the $75 i paid for mine was a HUGE waste of money.

ive cut three since way easy.

 

Heat treating is REAL easy. just put about an inch of motor oil in a glass jar or coffee can and after you've ground yours down, heat it with a torch till its starting to turn red and drop it in the oil... VUALA! heat treated.

 

thats not gonna cut it!

 

I will properly heat treat it. I was thinking about measuring the old one. Except it's still inside and I wanted to make the pin before the pump was apart. I will go off of the old one if I have to but how much are the aftermarket pins cut down? All I need to know is the angle and a depth and length of cut.

 

All you need to know is what the people who make them did research and testing on. Consider the value of your time as well. $110 is not that much for a 15 minute swap. Compare that to all the trial and error, or possible pump damage from using a dremel and a bowl of oil for heat treating. Unless you are a machinist or have access to one I don't think you will be truly happy. Just my 2cents
I ground my old pin to the point of breaking and thought it was good until I tried an engineered product. There is no comparison.

 

^^ Deffinatly somthing to be said for a tested and engineered product!

But for us cheap asses like ME! its fun tearing into perfectly good parts to tweak for our needs

These fuel pins are hard! lol Ive got a mill at home but just High speed steel cutting tools and they wanted no part of this fuel pin lol maybe M42carbide cutter?

So I walked over to the 4"grinder and set up some better lighting and ground away on my spare fuel pin.The reason im doing this is because my truck(see mods in sig) is runnin about 32 lbs@WOT and im told the hx35 like max @35psi so why not run it there...I could use the extra power for pullin.im getting ready to haul to Moab,Utah and ill be packing alot of weight!

So I ground and tried to keep close to the same slope angle of the stock pin just a lil deeper to allow more fuel through out the range and ground a lil further up to open the pin some more @ WOT.

Test drive:Notice a bit more smoke,yet still controllable I can accelerate pretty good with out blowing a huge soot cloud...but I CAN blow an impressive soot cloud! Boost is 35 psi @WOT perfect! I nailed it! got that extra 3 lbs of boost and a noticable increase in power through out the range...this mod along with the hx35 is awsome for unloaded traffic driving very responsive! to the throttle!

These trucks RULE!

 

I machined my own at work. I made two with different profiles, and one of them is too steep, where it doesn't come all the way up, and its difficult to remove. The other one works great! My shop heat treated them to roughly 55-57 HRC, but they still have a slight groove. I don't know if it's not hard enough, or if its just the discoloration wearing off. I think I made them out of 440 stainless. It can be done. lol good luck.

 

15 minuets?
I replaced the 4 screws on the AFC cover using metric cap screws, using my T-handle wrench I can have my fuel pin out in less than 60 seconds.

Use a bench grinder with a diamond wheel like we use to sharpen tool bits to grind the pin, use lots of cooling.

Jim

 

if I spent more than 10 minutes on the hole project I would be shocked...easiest mod Ive done to the truck to date...Ive done a ton of work to this truck.

Schamran that awsome man,I have a lathe and a mill in the garage,but im no machinist...im a maker of metal chips I am self taught.

After I got done I chucked up a high speed deburring tool on the air die grinder...thought I would work it a lil more lol that tool did NOTHING to the surface! NOTHING! im not so worried about wear.I'll keep an eye on it and report back if im seeing much wear from the lil pin riding on it...my surface is still very smooth and HARD!

 

Yeah you will have to use a diamond or a stone. I did all of the work on the lathe, and then I cut the profile with a CNC mill so there was no grinding required. Then it went to heat treat with a bunch of aircraft fuel injectors. lol

 

my new (harder replacement) denny t was 55-56 rockwell fyi. it also is getting a discoloration from the AFC pin riding it but no groove.

 

Is there alot of pressure on that AFC pin? how many foot or inch lbs is it?

Just curious.