Has anyone ever fitted a port/polished set of intake horns and/or a ported supercharger? I'm looking into getting such supercharger and couldn't find anything on NAM about it. Any personal users of a ported supercharger?

 

i did the intake horns and the intake manifold... you dont gain much ( if any ) :(
( but i knew that beforehand )

 

We've been making and selling our Ported and Polished Manifolds for awhile. They showed a huge improvement the flow bench, but we haven't seen huge gains on the dyno.

 

P/P SC horns, intake, SC and head. Like Way said, they flow great on the bench but appearantly aren't that much of a bottle neck for the intake path so you don't see a lot at the wheels.

I have no clue if the SC benefits are real or not. Since all the parts went on at once, I can't back out the adds from each one.

there was a ton of interest on the subject years ago (2003 or so?), but it's died down. There are a couple ways it's done. I think Endyn welds the sound ports closed, whereas Steigemeier doesn't I don't know that it's worth the money, but if you're having your SC rebuilt (they only last so long), it's not a big cost adder to get your case worked over while your at it.

Matt

 

I figured they wouldn't do much. I do like the idea of more flow however. Seems like it'd be easier to get more fresh air, which means lower IATs?
Nothing I'm interested in yet. I need to get some other basics done before I start spending money on port and polish haha.

 

ENDYN has been porting intake manifolds and intake horns for many years:

 

Waylan,

Just curious, what have been the dyne results? 1 to 3hp? More or less? Just curious. Also wonder if this shows more or less improvement with or without a head , cam, header, catback exhaust, or intake. A lot of work to test for all of that but variations could be the key.

 

We installed a modified supercharger: one where the triangular vents in the outlet of the charger had been eliminated. With great anticipation, we put it on our dyno, and saw no measurable change. We've also knife edged the driver's side bullhorn, but I don't think we've ever tried to isolate that mod on the dyno.

 

The triangular ports in the S/C are the "silencer ports" and filling them in supposedly, will increase IATs, increase S/C whine (noise) levels, and have no real effect on HP output. This is gathered from a S/C rebuilding companies site that i cant think of atm.

 

they lower the sound by letting the air mix more as the rotors turn. It allows higher pressure air to bleed into the SC rotors before they get to the exit port where it's all forced out. This has got to increast turbulence and friction in the air. I think the higher IATs are from building more boost!

Because the M45 is being pushed so close (past) it's thermal sweet spot, any time you make it work to higher boost results in a larger degree of heating.

That said, I don't know of anyone who cared to do a compare and contrast with the two different approaches on the MINI. But whatever happens, no one who's used a P/P SC on an R53 has had any good information about it building more power or not!

Matt

ps, I'm also guessing that those that don't fill the ports have an explanation as to why that's the better way to go, just like those that do fill them are sure that it's the right way to go!

 

I agree with you. From a "logical" view on things, filling them in could nothing but help overall performance. But simply, those holes are there on every Eaton unit made, regardless of platform.


Stiegemister:

Entertaining thread concerning this matter: http://www.redlineforums.com/forums/...cer-holes.html

 

yeah I'd have to say capping the silencer holes could be a bad idea; could mess up the flow inside the housing, but I'm no engineer. Don't get me wrong, I'm all up for more whine if doing so is safe to do.

 

Have the rotor blades re-coated and new roller bearings installed~~~~~You DON'T want any more than 20lbs anyway so efficiency is really the "key " OBEY

 

Have the rotor blades re-coated and new bearings installed~~~~~You DON'T want any more than 20lbs (ecu / pistons) anyway so efficiency is really the "key " OBEY