Alternative Port EFI IntakesThis board is for tech discussions and questions about aftermarket port EFI such as the HSR, MR, SR, BBK, FIRST, etc.
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I have the Superram and its sucky design. I have 3 stripped threads in the plenum. How do I go about to fix these? It is Aluminum, and I heard that Helicoils don't work to well. I want to keep the same bolt size, because I don't want to have to drill out the runner holes as well.
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88 Firebird Formula 350 89k miles 13.1 @ 105... 1.8 60ft W/ low compression in 2 cylinders and smaller cam... Superram- Trickflow AL Heads- 268XFI *3290 LBS*
To Do List: Tranny (#3), Rearend (#3), Paint... Then DONE!!!
Basically, you are saying you dont what to fix it.
I believe that you are talking about the threaded holes in the bottom of the plenum --- the runner to plenum screws that go in from the bottom. You could put a bolt (screw) thru from the bottom and hold it in with a nut inside the plenum,,, make sure that you use red loctite and plenty of it. If the nut comes free, its going to go into a cylinder.
The best way is to go up in size to the next larger English or metric size thread, and put it in from the bottom; retap the hole in the plenum, and drill out the hole in the runner (which you said you dont want to do).
If I drill it out bigger, then I would have to drill out the runner, which I have no problem doing. It is the fact that if I go with a bigger bolt, then it wont fit, as the head of the bolt would hit the runner and not allow me to tighten it.
I think i am going to end up helicoiling it.
If I were going to use a bolt, I would weld them to the runner, and have the head of the bolt coming from the top, but it doesn't seem very reasonable and kinda risky at that.
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88 Firebird Formula 350 89k miles 13.1 @ 105... 1.8 60ft W/ low compression in 2 cylinders and smaller cam... Superram- Trickflow AL Heads- 268XFI *3290 LBS*
To Do List: Tranny (#3), Rearend (#3), Paint... Then DONE!!!
No, the last few threads are cold rolled and as such actually too tight. When you use the install arbor to thread them in, once the insert bottoms out when the top mushroomed part hits the bottom of your countersunk section the insert won't thread down further, the install arbor will thread tightly into the inserts expanding the last couple of threads, anchoring the insert in place.You will feel this when the install tool becomes harder to turn and then loosens up again. It'll never come out again.
