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Old 01-03-2011, 04:09 PM   #1 (permalink)
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Question Fuel pin

I have turned my fuel pin 90 degrees from stock and got my power screws just right and where i want them. Big difference in POWER!!!! And i love it. Screw all that smoke crap i was saying before!! Im building for power now. How do i go about grinding off the stock fuel pin?? Do i just make the deeper grade of the fuel pin deeper? Dont really want to use air tools on it.. Can i use a hand file? And how long would it take? Please remember i am new to these first gens and want to know what i am doing. If it was a 2nd gen 12 valve i would know what im doing with the fuel plate. But its not so i would love to learn how to do this until i can afford the denny T performance fuel pin
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Old 01-03-2011, 04:40 PM   #2 (permalink)
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Here's what mine looks like. I just used a grinder.

This is about half way done compared to stock.
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Old 01-03-2011, 06:18 PM   #3 (permalink)
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Bench grinder followed by a Dremel
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Old 01-03-2011, 06:21 PM   #4 (permalink)
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I forgot, after you grind it you need to smooth it out with sand paper or it will wear on the little pin.
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Old 01-03-2011, 07:29 PM   #5 (permalink)
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And, congartulations on starting to grow up.
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Old 01-03-2011, 08:47 PM   #6 (permalink)
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do what huntinguy has in his first picture and dont worry about an aftermarket pin. try not to grind at the bottom of the ramp so you limit low boost fueling. that will help spool up and run cleaner.
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Old 01-03-2011, 09:06 PM   #7 (permalink)
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^ what he said. I made that mistake first go around. Had a spare to do right. Would smoke like a pig on take off. Fixed it now. I went higher and deeper then the ones above and got clearance out of the top cover so the pin could go higher into the housing.
And a file would take days I would think?
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Old 01-03-2011, 09:42 PM   #8 (permalink)
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Originally Posted by 1st gen fanatic!!! View Post
I have turned my fuel pin 90 degrees from stock and got my power screws just right and where i want them. Big difference in POWER!!!! And i love it. Screw all that smoke crap i was saying before!! Im building for power now. How do i go about grinding off the stock fuel pin?? Do i just make the deeper grade of the fuel pin deeper? Dont really want to use air tools on it.. Can i use a hand file? And how long would it take? Please remember i am new to these first gens and want to know what i am doing. If it was a 2nd gen 12 valve i would know what im doing with the fuel plate. But its not so i would love to learn how to do this until i can afford the denny T performance fuel pin
Good deal. I don't know if you've already this or not, but while you're in there, you can also tighten up the star wheel that the spring rides on. Just get a screwdriver, and turn it clockwise 1-2 turns or however much you can go. That also makes a difference. Then, you can always tighten down your "pre-boost fuel screw" on top of the fuel pin plate by prying off the metal cap and adjusting it. That can give you some extra fuel for the RPM you're running.

Sorry if you've heard that before, thought I'd throw it out there anyway. Haha
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Old 01-03-2011, 09:47 PM   #9 (permalink)
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Then, you can always tighten down your "pre-boost fuel screw" on top of the fuel pin plate by prying off the metal cap and adjusting it. That can give you some extra fuel for the RPM you're running.
That actually fuels more fuel at low rpm, nothing to do with high rpm. it will probably hurt spool up more than anything. it did with my setup.
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Old 01-03-2011, 09:59 PM   #10 (permalink)
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That actually fuels more fuel at low rpm, nothing to do with high rpm. it will probably hurt spool up more than anything. it did with my setup.
Ah, my bad. I'm still pretty new to the 12v. And yeah, now that you mention it, my spool up does seem a bit slower than it was. I probably need to let mine back out some.
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Old 01-03-2011, 10:04 PM   #11 (permalink)
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I'm pretty sure most of us have seen this pic before:


What is the benefit of grinding the pin like in Huntinguy's first example rather than like this?
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Old 01-03-2011, 10:38 PM   #12 (permalink)
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I ground maybe @25% of it because i didnt want to screw it up. I turned my start wheel 1 full turn the other day when i was in my pump. I took my truck down the road after i got this done and its such a big performance difference!! But im just wondering how much better is the denny T stage ll fuel pin than grinding your own? Besides actually being machined out. How far is it cut into the pin?
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