Anyone happen to know the factory setting on the high speed needle for the Evolution 46 NT ?
like how many turns out it comes preset to ?

Thanks much

Each motor is different since the Evo's are tuned at the factory before they are shipped (or at least that's what the book says). The last Evo engine I had came with the highspeed needle open only about 7/8 of a turn. While the motor ran at this setting, it seemed to be awfully lean. I opened the needle another full turn and have been running it there ever since with no problems.

Any of you guys with Evo's ever had this problem. I was running an Evo .46 in my Twist. I noticed that the muffler was coming loose because the stupid thing would turn while the engine was running. The screw seems tight. So, how do you go about getting it so it doesn't turn? Stupid thing spews exhaust all over making cleanup longer than necessary. Also, the gasket that goes on the muffler when you bolt it up to the engine, can you leave it off or should you always have it on?


Dave...

I have heard some people recommend not using the supplied gasket, but instead making their own out of high-temp silicone. I just use the supplied gasket because it's easier and it does the job. Whatever you do, make sure you have some sort of gasket there to prevent metal-on-metal contact and provide a seal on that seam.

Also, 2 tricks to getting the muffler tight. One is to loosen up the 2 halves of the muffler and run a bead of high-temp silicone around one of the ends, then put the 2 halves back together. This prevents leakage at the seam. Also, the screw really doesn't do a whole lot to tighten the muffler. Take a wrench and, while holding the screw tight, turn the lock nut on the back of the muffler. This seems to help a lot more than turning the screw (for some reason).

Thanks for the info guys.
I was wondering about the muffler seam also. I have read posts where some people say that they had trouble with leaks at
the muffler seam and the changing pressure in the muffler was causing the engine to run very inconsistent, so I am going to try
using a little high temp silicone and tighten the screw.

Rubber, thanx for the tippo!!!! Will give it a try. The high temp silicone, can this stuff be had at like Lowe's?

Dave...

Lucky,
I don't know if Lowe's will have the high temp stuff, but you can pick up a tube at just about any car parts store
like Auto Zone, for just a few $

I picked up some of this stuff the other day...haven't had a chance to use it yet though. http://www.acehardware.com/product/i...entPage=family

My father owns a auto repair shop so I "borrowed" a tube of black RTV high-temp gasket maker from there. When I'm out of that stuff, then I'll start to use the stuff listed above.

Exactly what I had in mind... I couldn't remember the name, 'Permatex'
I think I have some in the garage.