924Board.org

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

There is so many different one with such a large price different that I don’t know which one to choose.

I want:
- in cabin
- set on the fly, no tool required
- ease of use

I don’t want:
- spend more money then needed
- an unreliable pieces of sh!t.

Please share your experience
Thanks
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1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

I am using this one but its under the hood. It's very small and seems well built. I don't goof with it much but its been plug n play. Just turn the knob. Its a tad overpriced IMHO but I found one used on fleabay.

http://www.amazon.com/Turbosmart-TS-0101-1001-Boost-Tee-Boost-Controller/dp/B001N1KV22

and for a real life size scale

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1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

in cabin boost controllers are generally a bad idea. Too tempting to the driver to turn the wick up.

Also they all work on essentially the same principle (except the electronic version that control a vacuum solenoid) where they control the amount of boost seen by the wastegate using a spring with a small ball as a valve. add more pre-load to the internal spring and the more boost pressure it takes to move the ball off the seat.

Typically the failure mode is that they get dirty internally and the controller is stuck either on full boost. This is true for the high-dollar billet units or the cheap ones built from a Grainger catalog (google Grainger valve).

My suggestion to anyone wanting a boost controller is to place it under the hood and carefully adjust it to the max pressure they want and leave it alone. Also, the wastegate line on the 931 is worth keeping intact as they are getting hard to find, so try to find fittings that will thread in and allow you to make your own line.

Keep an eye on the boost pressure from inside the cabin to ensure it does not exceed the desired limit, pull over and adjust if it does. Make sure to use a locking nut.

If you want selectable boost settings, I suggest moving to an electronic boost controller that uses solenoids. There are several on the market, including DIY solutions, they all work essentially the same and leverage a MAP or pressure sensor to track the pressure in the intake and release the wastegate when the desired target is reached.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Joes924Racer · Posted: Wed Sep 19, 2012 1:01 am Post subject:

"The writings sp small on it ,cant read it. Does it say do not mount in cabin. If not then 80 bucks is not a bad price. Dan and the RSRguy
both have nice incabin ones... if i went underhood , a boost guage
would make things better.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

I've built them for $10 and they work just as well as the fancy ones. To each their own, I prefer to use solid state controllers to cut down on the work I have to do in the cockpit.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

kcoyle · Joined: 15 Jan 2011 Posts: 712 Location: Long Island, NY

Also, if you don't want to cut into the WG line, you can buy two hose barbs from the local hardware store and these two specialty adapters (ordered from egauges) to just bolt it in.They are the brass bits in the pic.

Qty Part No Name Price Total
--- ------- ------------------------------------------------- ----- -----
1 R7963 Adapter Bushing - 1/8 NPT female x M14 X 1.5 male $6.40 $6.40

1 R7962 Adapter Bushing - 1/8 NPT female x M12 X 1.5 male $6.40 $6.40
_________________
1982 931- Stock with MBC at 8psi

Relax, all right? My old man is a television repairman, he's got this ultimate set of tools. I can fix it.

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

i use this the Forge Motorsport T style controller.
i installed it under the hood.
it looks clean to me, i hate all the blue and red sparkling crap you can nowadays buy for your honda....

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Supercharger and EFI kits
https://www.the924.com

jazz guy · Joined: 26 Nov 2002 Posts: 434 Location: Colorado

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

jazz guy · Joined: 26 Nov 2002 Posts: 434 Location: Colorado

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

Finally got it today, the best one for my GTS poject, a 935/924 GTR boost controller

I bough it as a core, it will need a good clean up and a function test.
I did a blow trough test and play with the adjustment at the same time and so far so good

_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

Cedric · Joined: 27 Aug 2004 Posts: 2807 Location: Sweden

Where on earth did you find that? Looks brutal and old, just like it should be! Have been looking for a boost knob that actually fits the 70s turbo look and dont look like a bling bling jap crap thing, and yours is about how it should look

Guess there arent more of them were that came from ?

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1980 924 Turbo
www.instagram.com/garagecedric/

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

In my search I found a clean one for $1000 here (tom1394racing): http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/696065-searching-935-boost-controller.html

Thanks
_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP

924-76 · Joined: 05 Jun 2006 Posts: 1489 Location: Ontario, Canada

Also, the old style Greddy Trust boost controller is similar looking, easier to find and a lot cheaper.

_________________
1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP