Faabspeed re-circulation-bypass-hose, which parts is this replacing?
 

Hi
I am currently looking for upgrades for my Porsche and i came over this hose on Faabspeed.
Porsche 911 Turbo 930 C2 Turbo-Style Re-circulation Bypass Hose - Fabspeed Motorsport

What is the purpose of this hose?
Will it replace the orginal bypass valve or where should it go? This part?http://forums.pelicanparts.com/uploa...1223490856.jpg

I have also started thinking about changing out my stock IC to a long neck one.
Which one is the best for my setup, and will it actually gain me more hp?
The setup on my car today is:

SC camshafts
K-29 KKK Turbo
Turbokraft injectorblocks
OBX Headers
RarlyL8 exhaust
1 bar wastegatespring
Kennedy Engineering clutch
MSD CDI ignition

I believe that hose is used in conjunction with the newer 964{??} style blow off valve, as that is a copy of the 964{??} style elbow hose.

That style blow-off valve is attached at that small top opening on that Fabspeed red hose.

You would then disconnect or block off the old sliding piston re-circulation system that is on the base of the stock 930 intake manifold.

Others will correct me if I have my head up my ass...:}

Mark

Hei Tor Erik,

Nice parts on your car. It certainly deserves a better IC.

I'd get in touch with Chris at turbokraft and have him make you one fitting your goalS. I'd also have him supply the later style elbow as well as a later style BOV.

MY 2 C

it would replace all that crap above BUT you have to change the blow off valve and the IC.
I don't know if there is an adapter for the stock IC to the throttle body


I have a 7006 turbo, I don't know what you can get to replace the connector from the turbo to the rubber boot you are looking at, but instead of 350, if you can use the 964 boot it is only $50.

$350 for a $25 piece of silicone, that is rubber room pricing... Get yourself a 964 elbow and BOV from our host and use an exhaust adapter as a transition piece from the intake elbow to the turbo intake with a couple of silicone connectors. I welded mine up but that is not necessary. You'll still need a long neck IC.

BOV Part #: 993-110-337-51-M93

elbow Part # 930-110-382-00
http://forums.pelicanparts.com/uploa...1487260745.jpg

Thanks guys :)
So anyway i need a long neck IC?
Faabspeed says this on their site : Compatible with OEM intercooler, Fabspeed's Long-Neck Performance Intercooler, and most others

So i would still need an adapter for the intake? Sorry for dumb questions, but trying to figure out how the intake system on my car is working.

I think the price is crazy for just a hose yes, so would never go for that one. But i was just wondering if i could make up something similar if it could remove the old bypass system.

Thanks for part numbers boosted79 :)

I think the long neck ic is quite an expencive update, but you think it is worth it?
The weather in Norway in the summer could be cold, but better cooling for the intake couldn't hurt anyway i guess.
Which one will you prefered? Is there any of the LN ic without red silicone hoses?

I would have a look at turbokraft yes, thanks :)

Longneck intercooler, all black anodized for a more OEM appearance, all C2T updated boost recirculation valve parts included, sturdy mounts and o-ring seal to the throttle body

And NO ricer-red silicone hoses.

http://forums.pelicanparts.com/uploa...1487263597.JPG http://forums.pelicanparts.com/uploa...1487263655.JPG

Currently revising the design to be an even easier bolt-in fitment, less end tank volume, and no modifications to the stock air filter housing.

boosted's setup is like mine cept I have a RUF IC.

it is nice not having that mess under there.

not sure how it works with OEM

Hmm, that Turbokraft ic looks really nice! how much for shipping to Norway?

I have the TurboKraft long neck IC. Very happy with it!

http://forums.pelicanparts.com/uploa...1487268911.jpg

http://forums.pelicanparts.com/uploa...1487268911.jpg

Economy post is about $145.

Don't forget to let me know when the new design is ready. SmileWavy

I have the porsche 964 elbow brand new and never used it. Just in case someone wants/needs one. I have had it for a couple of years and never used it. Can let it go cheap.

- Chris.

In case you wanted to see the fabspeed hose. I used self-bonding silicone to get rid of the red.

https://c1.staticflickr.com/9/8875/2...c14d1d0d_c.jpgIMG_2374.jpg by Shannon, on Flickr

do not hesitate to do this - the space liberated in the bay and the throttle response / flow increase / driveablity increase are all immense!

will complement your existing mods *quite* well!

looking fwd to your impressions after install 8-)

Huge difference when i did mine..I think you will be really happy with this mod..

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Thank you for all replies :)
I wanted a LN ic but for now i got me an Andial racing short neck ic for a good price in Norway.
Hopefully it would help a lot, but is there still a lot to earn on trottle response if i remove the old recirculation system? I was thinking if i should block the old bov and install a 965 style, but i guess this is not enough since the air will first go into the old chamber and then to the trottlebody if you now what i mean. I now if i change out the old system i would not install it again, but i still like to keep it and not chop it up to make a new "neck" for my ic. Then i would make something from scratch i think. What do you guys think?

Change out the old IC with the new one and leave it like is?
Change out the old IC with new and block of stock recirkulation system and go for the new albow with new bov?

Or change it out and remove all of the old system an make a new neck from the IC and straight to the throttlebody?


I now it would be easier to buy a long neck one, but it wouldnt be that fun ;) and also i would dobble the price on the new IC

Check out my build thread "another 930 teardown" pg 5. I did exactly what you want to do, used a garretson (andial) short neck IC and made a transition piece from the IC to the TB. It's a lot of work to get it right.

I sent you a PM.


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maybe just bring your I/C to a fab shop and have them make it a LN?

yes, the increase in throttle response is worth it

I think i would make it myself :) Havent recived the new ic, and i dont have my car here with me.
Do you guys have the dimension of the throttlebody without the old system and also the dimension on both the inlet and outlet on the Intercooler? The area with o-rings. Tried to find the dimension of the o-rings but i cant find it.

And also the dimension of the threads on the boost switch if any of you guys know it :)

Thanks!

It is probably easier to just cut off that part of your existing intermediate manifold aka BOC housing and weld a plate over the end.

it's made of magnesium good luck welding that

I know it would be easier to just cut the old thing and get someone to weld it yes, but i would like to keep my stock parts just in case.

I really like that adapter you made boosted79, so hopefully i can make something similar to that :)

You can leave your original cast magnesium intermediate manifold/blow off recirculation manifold in place and just disable it by removing the long spring inside behind the piston and replace it with a piece of PVC pipe to keep it shut.
A piece of broom handle or electrical conduit would work too.

Might be a good idea to replace the two seals under the two cast aluminum end pieces if they are dry rotted. After 20+ years they probably will be.
Doing that will let you keep and use the short neck intercooler you have.

For the black rubber factory elbow hose with the 1" diameter 964 turbo recirculation valve fitting on top you can get it cheaper from some Porsche dealers than anywhere else.. and somebody posted they have one to sell above.

Had I to do it again - I would just spring for a long neck.

How would that effect lag?

It doesn't much.
You still have the problem of that housing's volume, and that air leaks around the factory piston even if you replace the end plate seals.

Buy a damaged factory boost recirc housing and and modify it, or convert your own IC to longneck, or purchase a finished bolt-on package.

The C2 type blow off valve reacts faster during quick off on full throttle movements while up shifting. It seemed that way when I changed from the big heavy original one to an after market 964 turbo type recirculation valve that uses a 1" aluminum piston and spring.
You can put washers under the spring to shim it if wanted.

I was wondering about shimming the spring,what does that do?

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It depends on several things including what altitude you live at. Best to just try it and feel the changes while watching the tach. Washers for shims are cheap, plastic ones weigh less, and you would need an after market aluminum blow off valve that can be taken apart.

My shop is 4800 foot above sea level,and thats usually where i drive the car and then climbs to around 6.I do notice quite a power loss compared to where i used to live right at sea level.

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I was wondering where I could by the aluminum blow off valve,thanks JF.

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Probably best to get one from Turbokraft. They know what works best on these cars.

If you know what to look for and want to experiment there's an endless supply of low grade recirculation type valves and vent to atmosphere Asian blow off valve copies on ebay.

For something solid and reliable that will fit right and last a long time you'll be best off if you call Chris at Turbokraft and buy one from him.

Thanks alot I will,give him a call when I have some extra cash.

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I have now changed out my old IC with a Andial IC, and also changed out the blow of valve to a new type. Tried to put the vacum line on the same hose as the decel valve, but it doesn`t seems to work good. Where have you taken vacum for the bov?

I am also thinking about removing the decel valve since i have very high idle when the car is warm, and i have read that the decel valve could be the problem? Will there be a different problems than more crackle and popping in the exhaust?
Thanks!

http://i6.photobucket.com/albums/y21...psyeqf7anu.jpg

Just build an airtight room, replace the air with argon, and weld away in safety. That's how the Russians made magnesium subs. ;)

We can weld Magnesium, or anything else for that matter. For the modded 930 BOV I use JB Weld, easy and works perfectly.