Anti-surge comp. housing missing anti-surge relief holes

[blackout_89t]

Title says it all...

Garrett Gt40 compressor housing, with the anti-surge shroud, but no anti-surge relief holes in the housing. Anyone else discover this? See pictures.

What the housing should look like:

http://i58.photobucket.com/albums/g260/4cefed6/Fig2_enlarges.gif

Mine:
http://i58.photobucket.com/albums/g260/4cefed6/DSCF2642.jpg

If there are holes in the housing, the water should not be able to pool up like that.

Can the holes be added?

 

[tubbie]

Let me know when you find the answer.... Mine is exactly like yours....

 

[drjonez]

you sure they don't actually feed through?

 

[bensn8]

Why drill it? Return it for the right one.

 

[tissimo]

you sure they don't actually feed through?

looksl ike he has water in it.. no passage at the comp wheel..

oh well.. i've heard you get more power without the anti surge crap?

 

[drjonez]

yup, anti-surge housings reduce compressor efficiency and thus lower power....but they sound cool!

 

[supra90turbo]

LOL if nothing else....
I'll probably run an anti-surge housing, just because I'm a ricer like that.

 

[blackout_89t]

yup, anti-surge housings reduce compressor efficiency and thus lower power....but they sound cool!

Yes!

I can deal with the 2% efficiency loss.

The turbo is already capable for more than needed for my purposes right now.

Nobody has any insight into this?

I am sure the GT3582R, GT4082/4088/4088R/4067R all use the same compressor housing casting and is just bored to match the minor compressor wheel size differences.

More info about the "ported shroud"

http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html?#t103_3

From this page listing "GT" style turbos, only the GT42 has a listed feature of having a ported shroud, yet all the pictures of the turbos show the "shroud"

http://www.turbobygarrett.com/turbobygarrett/products/turbochargers.html#Large

 

[MK3Brent]

Adam.

You told me you have a GT4082, this is the .58AR compressor housing?
I just ordered my 4088 from Dave, and it's a .72AR compressor.

Do you believe they could be different?

I'll get some pics when it comes.

 

[MK3Brent]

Another thing I notice on that website. Seems only the GT42 series actually SAY "ported-shroud" in the description.

Maybe it's possible the others aren't real anti-surge housings. **Just an idea.**

You could definitely hear it though if it were.

 

[blackout_89t]

yes .58 50 trim

 

[Reign_Maker]

Blackout, I have a GT4067R with the antisurge... This is what mine looks like...

 

[MDCmotorsports]

Anti surge housings increase the compressors map width.


If you really want your housing to become antisurge - take it to a machine shop. They can cut the antisurge "slots" on the housing.

Also, Jake - Your antisurge housing is a to4z variety.

 

[Reign_Maker]

I just hope it works when I spin it... Its been sittin so long, I think there's spider webs in it...

 

[p5150]

Your compressor housing as a whole looks different from my GT42.

 

[NashMan]

the gt40 sires never had holes ever i don't know why but they don't the gt42 does thou

but i herd perstion sell them wiht holes in them for the gt40 series they take garret stuff and try to make it there own

 

[blackout_89t]

Thanks guys.

I will see what my machinist says about getting it drilled.
Thanks

 

[MDCmotorsports]

No drilling required. If you drill holes in that housing, you'll be in trouble. You need to have the machineshop use a slitting saw in a mill.

 

[blackout_89t]

90 degree drill...

 

[IJ.]

Is it surging?

Or are you just fixing something that isn't broken?