good ol JagV8! How are you mate? Regardless of all the positives the K&N has to offer you always been a staunch hater of K&N air filters , for a very long time, but its all good! I too once was hesitant to place one in my STR, but once I did with Mafiosos Air intake and the Baffle removal, it made a huge difference. Just my two cents
Peace!

 

As I just wrote, if you change some/all of the rest of the intake you may want to change the filter. Etc.

I've seen far too many faults caused by K&N ever to use one on my own car.

 

To aid the whine, remove the black cover over the charger and coolers, remove the under hood sound deadening and it will definately be louder. Alongside this i have taken the air box baffle out and dropped a K&N in.

Whilst removing under hood insulation does not aid air intake to the filter box it does open up a small 3/4 inch gap to allow cold air into the engine bay from the main center vent allowing for lower under hood temperatures in the engine bay.

I am very pleased with the whine now really throaty, i am looking at a pulley change in the new year and fabricating a similar intake to the Mafisio one over here in the UK, then whether a open airbox/heatshield can also be fabricated with dedicated air intake and flushed bonnet vent...

 

What exactly is plugging the silencer ports? Are these ports on the blower itself or are we talking about the 4 "arms" that protrude from the intake tube? My blower is currently off the car due to the under the S/C coolant leak...

 

Regarding: plugging blower vents, I believe V8STR is referring to the blowers internal boost bypass channels. These relieve boost to both not overboost and cut down blower whine. Eaton rebuilders/modders offer to block the bypass vents to accelerate building boost. The end result is more boost at the expense of too much whine for most appetites...ok for a track dedicated car.

 

I'm gifted with the endless desire for excess

Here's a thread... She's a screamer! Plugged SC Silencer Holes Eaton Supercharger - Saturn ION RedLine Forums

Left my mechanic a VM, hope he's up for the job and it's not too late...

 

Hmmm. So are those ports just for sound? Does it help to build boost quicker?

 

According to the redline forums who claims they got this from Eaton:

"The two oval slots on the output plate are air leakage ports. Their only purpose is to decrease operational noise from the blower. Arnie, from Eaton Corp., explains their function like this, "When you stomp on the gas, the boost shoots up and the air flow goes supersonic. The air then slams back into the output plate and through the leakage slots, which reduces the hammering of the air into the housing causing less noise. The OEM can not have such loud NVH, that’s why we put them in the housing. The 2 small ports are not there to feed air, only to reduce noise." Basically, for the best flow and most efficiency, these ports can be blocked off, making the outlet port (triangle slot) the only port on the outlet plate of the housing. Closing these ports will not increase IAT's; however, it will make the supercharger much louder when in boost. As an example, aftermarket supercharger companies, such as Harrop, Roush and Magnuson do not use these slots in their blowers. It should be re-stated, that you should consult professionals regarding closing these ports; and do not, for any reason, plug them with JB Weld. Improper closure could eventually lead to pieces coming apart and loose debris destroying the rotors and housing. Opening up these ports will only have a negative effect on efficiency. Do not port them."

 

A picture might help. Note the big triangle and the two smaller slots. I think these two slots are what they are talking about. This is a ported blower next to a stock one. It's hard to tell any difference and of course there are NO dyno test of any kind to back it up any claims.




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Thanks for the visual aid...I guess the question is how (and more importantly how much) to plug the holes...If I could find someone and it needs to be done this tuesday or wednesday only, to weld and grind for like $100 I'm down, but otherwise I may try the epoxy route...

Porting is really an "one size fits all" blanket term...A lot of port tech are artists and just grind everything by eye...Maybe they'll be gains, and maybe it'll be affordable...But, to get the maximum results, it's a science...Need lots of trial and error with flow testing along dyno runs to ensure the computer isn't messing with fuel trims or timing in a negative way...

For a fun read, check this out: http://ls1tech.com/forums/advanced-e...r-intakes.html basically the premise that golf ball dimples have proven better flow on golf ***** and fuel economy on a car that had added dimples via mythbuster...Intake manifolds may someday have golf ball dimples along with the prius's exterior...lol

 

Dimples and ridges allow air/gases to slide rather than twirl or tumble...like that used on the surface of airplane wings. This principle is also used in cylinder head porting to prevent turbulence.

 

This principle is also used in condoms (yes, seriously, lol) although i'm unsure if it's to prevent turbulence or not...

 

Eaton Superchargers Modification Guide - Eaton Inside

 

Good read, if you read between the lines, it further supports the use nitrous vs a pulley...

 

Yikes! Don't try this at home kids

M112 Supercharger bench test - YouTube

 

this site does not work !! I'm crying....

someone saved the document in pdf?

 

I would not be in a hurry to use that link.
My total security package just blocked that link site as being malicious when I tried the link to see if it was working.

 

You don't want it. The Eaton is maxed out. If you want more power fit a different SC (as others have).