Fuel pin usefulness.

[huntinguy]

here's mine.


Just for kicks.

[IrishChamp]

Excellent

[lectro_static]

Not trying to talk you into or out of anything, I have an m3 pin and a 5spd with stock injectors and never had a leaking problem. I went with the aftermarket pin for two reasons, first being if I didnt like it for some reason I can drop my stock pin back in and second being the ground pins looked and felt weak. I have not heard of one breaking but that would be just my luck.

[dpuckett]

I ground my stock pin on a belt sander, then smoothed it out on a buffing wheel for a nice smooth finish. I dotn remember how much boost I gained- that was 2 years and a pickup ago.

DP

[huntinguy]

Not trying to talk you into or out of anything, I have an m3 pin and a 5spd with stock injectors and never had a leaking problem. I went with the aftermarket pin for two reasons, first being if I didnt like it for some reason I can drop my stock pin back in and second being the ground pins looked and felt weak. I have not heard of one breaking but that would be just my luck.

Remember, The fuel pin has two sides.

[ellis93]

Funny, I thought it was cylindrical

[huntinguy]

Funny, I thought it was cylindrical

Ok, four sides. But with it ground you could only use two. I think.

[IrishChamp]

Which side do people usually grind? How much difference does just flipping the pin to side two make? I would think that grinding side two makes the most sense and allows the deepest cut.

[Richie O]

You have to grind the deep side. If you grind the shallow side you will grind it in half before you get what the deep side uncut already offers.

[IrishChamp]

I did a little bit of grinding this morning. It made a subtle but nice difference. I also installed a 3200 spring a couple days ago, turned my pump a a turn or two, I'm not sure exactly, I jacket it out to reinstall pump top and then slowly went back in till it started and ran nice.
Installed a boost and EGT gauge as well, I'm making about 24 or 25 lbs of boost and my EGT's don't climb over 1200.
I really want to get a tach now! Previously my truck would do 29 in 1st now it screams past 35 quickly approaching 40 and still pulling hard, I backed off when it hit 37 or 38. In 2nd at 55 or so it's still pulling and 3rd at 75-80 it's got plenty more.
This is all with my rebuilt transmission and steel stator spec rite converter.
With this converter and a stock truck it was sluggish down low, but idled great and didn't pull at idle. Mid throttle was much improved driving around town.
With the power turned up a tad the converter is really happy. Bottom end is great even with the 21 exhaust housing, it pulls through all gears, it gets into the power band well but it doesn't just rev up instantly like before which I like, the connection between the engine and wheels feels much more "connected".

[IrishChamp]

Here are a couple pictures, 1st one is what I did yesterday, then I worked it again today.

[IrishChamp]

And a little more work, I noticed that the new wear track was going past the low point back up the slope towards the body so I extended the low point to the body of the cone rather than having it blend into the natural ramp into the body of the cone. I think I'm done!

[IrishChamp]

I picked up 1 or two lbs of boost with the last grind and a little starwheel tweak.

[Horicon93]

What kind of performance differences (compared to stock) have you noticed since grinding your pin?

[artieb]

Hi, I have been doing a lot of homework on fuel pins. I think a M1 would be the best for my style of driving, and would be the most likely to be ground further, if needed, for more aggressive feuling. I don't know makes them. I get fabulous mileage now, and will be installing a 3200 spring soon. Other than that, the IP is untouched on my 92 CTD, with a PS inner cooler.
I have a HX35 that is in the works, also.
Anybody have any input? And where I can get one? Thanks, Artie