Are they really worth 50-100HP? (Depending on the combo)

If so, probably the least expensive 100HP you can get at $385!

Is it a bolt on, any machining required?

besides the slip-on and facy machined inlet piece, whats done inside that it moves more air or the same air more efficiently?

 

From what I understand, the 50-100 horsepower is just additional POTENTIAL over a non race cover. I think the A/R is different also allowing it to move more air. I do believe they are a "drop in." I could be wrong on this stuff, but that's my best guess.

 

I just swapped covers with no issues. If for a fast wheel the standard raxe cover works for your mm size, if for billet you should call the company you got the turbo from so you get the same profile cut into

The housing is larger by about an inch

 

I have always wondered this same thing. It would be great to see a back to back test. Which in reality wouldn't be that hard for someone to do.

 

I could. I have both covers and can swap at the track. Be a few months though

 

The way I understand it... Unless you have the turbo maxed with the "normal" cover, the "race" cover isn't going to do a lot.

 

im renting a dyno the first weekend of march
i can let you know then

planning on maxing out a standard cover s476r, then putting the race cover on

 

Sweet ! Keep us posted !

 

Here's some visual differences:

 

Here are some pics of my S485 V2 Race Cover:








Mike

 

Mines the V2 for the billet s480

 

Way back in the day we tested a John Deere cover (aka slip discharge "race" cover) on a 72 and picked up about 25rwhp at 19psi. 725rwhp-750rwhp.

 

Good to know.

 

Pretty cool to see them side by side. Are they considered a mid frame turbo?

 

If you're referring to mine, those were for a BW S-480 V3. I don't think they'd be considered a mid frame.

 

was yours a bolt on, Could you just swap it out at home?

 

Yes, it was a direct bolt on. I ordered it with a race cover, and the vendor sent it to me with a standard cover. They sent me the race cover, and I unbolted the clamp and swapped the race cover right on. Unfortunately though I had already bought the expensive v-band assembly for the non-race cover...

 

good to know for sure! Im sure someone will scoop up the clamp and flange. How much you want for it?lol

 

I'm open to offers

 

Are these the ones that now come standard on the S400SXE turbos?

Andrew