Forced Induction Superchargers | Turbochargers | Intercoolers

Lets talk Borg race covers

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Old Jan 2, 2017 | 06:58 PM
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Default Lets talk Borg race covers

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?
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Old Jan 2, 2017 | 09:02 PM
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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.
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Old Jan 3, 2017 | 12:27 AM
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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
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Old Jan 3, 2017 | 10:51 AM
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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.
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Old Jan 3, 2017 | 10:55 AM
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I could. I have both covers and can swap at the track. Be a few months though
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Old Jan 3, 2017 | 11:33 AM
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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.
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Old Jan 3, 2017 | 11:36 AM
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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
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Old Jan 3, 2017 | 12:46 PM
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Originally Posted by mkvamso
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 !
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Old Jan 3, 2017 | 01:09 PM
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Here's some visual differences:

Name:  Standard%20vs%20Race.jpg
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Size:  294.1 KB

Name:  Standard%20vs%20Race%20rear.jpg
Views: 958
Size:  302.3 KB

Name:  Standard%20vs%20Race%20side.jpg
Views: 986
Size:  269.2 KB
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Old Jan 3, 2017 | 03:19 PM
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Here are some pics of my S485 V2 Race Cover:








Mike
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Old Jan 3, 2017 | 03:52 PM
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Mines the V2 for the billet s480
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Old Jan 4, 2017 | 09:46 AM
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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.
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Old Jan 4, 2017 | 11:17 AM
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Originally Posted by hellbents10
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.
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Old Jan 4, 2017 | 03:14 PM
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Pretty cool to see them side by side. Are they considered a mid frame turbo?
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Old Jan 4, 2017 | 03:21 PM
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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.
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Old Jan 4, 2017 | 03:45 PM
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Originally Posted by 408GT
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?
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Old Jan 4, 2017 | 04:25 PM
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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...
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Old Jan 5, 2017 | 11:26 AM
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Originally Posted by 408GT
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
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Old Jan 5, 2017 | 11:53 AM
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Originally Posted by LT1PWRD
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
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Old Jan 5, 2017 | 04:32 PM
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Are these the ones that now come standard on the S400SXE turbos?

Andrew
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