Thread: this might get something stirred up???

i wanted to do this to mine, but havent had the time or balls. i would really hate it for something to break off into my intake and have to make my pistons eat it.

I have no first hand experience, but I've read that the differences of heat expansion may cause the weld to pop out and then as Bio mentioned go to bad places. However I thought someone else actually did this and it was still holding...Good luck, I sincerely hope this works with no problems.

Originally Posted by Toasty

i'd think that even with expansion, if it's welded properly, that wouldnt be an issue. .... if it werent welded properly, and the fill didnt mesh with the surrrounding area, then i could see it "pop" out.

haha I meant JB welded. There has quite a bit of discussion on actually welding the slits shut and the high potential of warping the case.

I've seen the post where someone was sucessful with RTV. I wouldn't have thought of using RTV.

So are you saying that removing those makes it louder and/or for less heat? or keeping them makes it louder and less heat? I am lil' slow, haha.

I thought ar cases were like a quarter inch thick? I could see if it was like 1/8" warping easily, but if you knew what you were doing I wouldn't think it would warp.

I see what spot he is talkin about, but I do not understand if he is saying take it away or keep it.

Well, given the Gen 5 M90 slits are only about 40% of what the Gen 3's are, I doubt that there will be much issue with it if any. I would have been terrified to weld them shut, but apparently that is not that much of an issue.

Also, when I first ran across this being done, I thought to myself, instead of using liquid steel, jb weld and so on, why not take a piece of 1/8" thick by 1/4" wide aluminum bar stock and only partially cover the slits to about the same length as those on the Gen 5. You could drill an tap you a couple holes to hold the bar stock in place with some thread locker and you should be good to go. Id be sure to countersink and debur the inside of the hole where the rotors spin, but other than that I think it would be golden.

Any video clips of this mod

and was wondering just how hot this is going to get
closing up the air way like that?

This is the first i am hearing about this
so sounds interesting... More info..

Originally Posted by Toasty

wouldnt the bar stock create extra air turbulence?

No more than is already created by the spinning of the rotors.

whitcomb, would I be asking too much if I wanted some detail pics of your work? Inlet, outlet, casing, rotor housing and so on. In my mind, it would make sense that if you close off the slits you could open the porting up more, but thats in my own reasoning, the physics and real life application of it may not line up with my reasoning.

But Id like some pics of the whole thing as I may see if I can find a spare case to work on and see how it all goes. Its not a huge amount of work to pull off the blower, so it could be an easy project to work on.

I didn't get from the orginal post that this was actually aluminum welded closed. Nice job, if it lays flat and the rotors dont bind when all is reassembled. I didn't even think about it not sitting flat when mentioning the warp. More of my concern was rotor clearances.

Good work.

would like to hear about before and after...