911SC Turbo

[MotoSook]

Hey Thad..looks good. I missed the update until now...I see the fan shroud is powercoated too! Definitely add a ground strap.
Almost looks exactly like mine.

[tsuter]

Agreed. The paint on the bottom of the housing may prevent a good ground. Gotta find a T-fitting for the CSV fuel supply line from the back of the fuel distributor. Definitely decided that the problems with leaking supplemental CSV enrichment injection is a function of plumbing it at system pressure (75 lbs). They just don't make CSVs like they used to I guess. So I will move it to the control pressure side as soon as I can find a T for the existing.

[tsuter]

Looked at a lot of possibilites for the supplemental fuel system and decided to go with the stock 911SC CSV. Previously had used 914 CSV and yes even and old Volvo CSV but they just couldn't hold the pressure and consistently leaked.
Well the 911SC CSV doesn't leak at system pressure so today I installed it into the turbo outlet pipe.



The red device is a 3.0# NO Pressure switch. At 3.0 lbs of boost it closes supplying power to the CSV. Used the standard 4,5,6 CIS fuel injector line with banjo bolt connection for the 911 CSV.
This supplemental fuel line easily attached at the fuel filter with a brass T connector inserted into the line. Earlier picture showed that.

The other rubber line is the control pressure line to the Tial Co 35mm wastegate. Curently I have the .5 Bar spring in it and depending how that goes will add a Slowboy Racing manual boost controller to manage boost between 7-11lbs.



Should be burning rubber tomorrow.

[tsuter]

Photo of engine bay with all the parts back in.



Later this week I'll post a list of all the "enhancements" to this custom turbo as well as "how tos' for each mod.

[tbitz]

tsuter,

I'm no turbo expert, but doesn't it make more sense to have the pressure switch for the fuel enrichement after the throttle plate?

The situation I see is that you are at part throttle with no boost to the engine, but the turbo is already at full boost. You are now dumping fuel into the intake when it is not needed.

I see this situation occuring when your at high rpms, full boost and you release the throttle and let the engine slow the car down. Boost pressure drops to zero after the throttle plate, but the turbo has rotational inertia and maintains pressure before the throttle plate (in your gold pipe). Fuel now becomes excessively rich and will cause backfiring and other problems.

just a though....

Tony

[tsuter]

So that's where all that nasty back firing's coming from!

No sorry - I don't get any backfiring or big puffs of fuel smoke. The boost seems to drop fast enough when lifting the throttle that there are no problems. I did have problems with leaking CSVs that couldn't handle 75lbs of system pressure. The new one is the stock 911SC CSV and its not leaking - at least not yet.

However I am considering a DV between those pipes to sustain the spool up a bit on shifts.
I have a Bosch 0 280 142 108. Porsche P/N is 993 110 337 50 The P/N was for a 930 I believe. Black plastic L-Body.
Have to find some flanges and decide whether to put it underneath or on top. It would activate on vaccuum.

[tsuter]

Installed the SlowboyRacing manual boost controller yesterday. TurboXS model. Installed in line with the boost control line from the turbo outlet pipe to the wastegate and mounted on a little bracket attached to the rear fuse/relay cover. That is the fuel line to the supplemental enrichment CSV wrapping around the top.



Here is a wider shot showing all the local plumbing. Could have hid this more but it is easy to get at on top.

[RickM]

Tsuter: Great pics and info. Thanks

[MotoSook]

Thad, just caught this. Nice! Very nice! Now bring that best down here for our "Trip'in Fall" fun run!

[pjv911]

I just got 2 of those systems recently in a large parts purchase. I will be installing one on my R/S clone this week. I hope its worth the hassle. Both are BAE systems for use with the early 3 into one exhangers. My R/S clone has SSI`s on it so it should be a very easy install. I do have one question though. Could there be a oil psi deficiancy problem to my upgraded carrera tensioner after tapping in to use oil for the turbo. The oil feed line gets tapped into that fitting . Anyone else use that pass side oil tap for a turbo while using carrera oil feed tensioners at the same time ?

Also my R/S is pretty light at only 2160lbs . Do you really think low 13`s in the quartermile are obtainable ? The engine is a stock freshly built(2 years ago) 2.7s motor . It seems a little much considering the car right now would likely only go mid 15`s . Im using a early type 911 tranny with stock 7/31 gearing .

Kurt Williams

[tsuter]

I have oil fed tensioners and I didn't use the passenger side feed for the turbo supply and don't reccommend it. You didn't see that idea in this post.
http://forums.pelicanparts.com/uploads/Oil%20Supply.JPG

[Tim Walsh]

tsuter,
Just looking at that picture made me think of the MFI oil lines. I don't know how much volume you need but on the MFI engines there's a collar around the fitting that screws into the case. It then has a line running off of it into the pump (where it's restricted down to a pinhole.

I'll try and find some pics of it. It might be a more elegant solution than that T fitting

[dd74]

With all this talk of turbos, what's the latest with RFNG's unit? Anyone know?

[sammyg2]

I spent a while staring at my engine yesterday trying to decide where to get an oilsource for the turbo. I look at a few places but finally decided to tap off where the idiot light sender is located.
Cool, that means at least a partial engine drop.
If I could come up with an oil source that made more sense I would do it. I'm all ears.

I also made my pop off valve in my air box innoperable so it won't open under boost. I used epoxy to seal it closed and then made a metal strap that clamps it closed. I also epoxied the strap to keep it from coming loose and going places it shouldn't. Photos to come later.

I still have to plumb the oil to and from the turbo, cut the sheet metal that goes behind the engine, seal off the driver's side heater duct, re-route/block off a few vacuum lines, and figure out where to connect that line that comes off the waste gate.

My piping from the turbo to the throttle body doesn't have any taps so if I need a boost source I'll have to get it from the throttle body.

[pjv911]

Its finished(except for the muffler). I will post pictures soon. Definetly makes much more power now. My guess is close to if not over 300hp. With all this melting snow traction is hard to find. Boost seems to come much faster than 3500 rpm as tsuter mentioned. I think its more like 2500 rpm plus the engine seems to have all of its stock power before then. With the 7/31 ring and pinion it comes alive very fast. I found the muffler does not properly fit the early rear bumpers so I will be making a 3" flowmaster setup this week if time allows. Sounds really good right out of the turbo outlet itself(open). Im also considering making a straight pipe as an option . Overall I am very happy with this makeshift low dollar kit. It really works well !
Its really pushing me harder now to finish the other car using the C2 turbo motor I bought 2 months ago. If 300 hp moves my 2160lbs car this well I cant imagine how well the other 69` car will go with over 400hp. It has to be scary fast.

Kurt

[turbo6bar]

If anyone has a spare turbo kit, email me. Hey, it's a longshot, but worth a try.

Getting cold here, and I need a winter project.

jhartwig@midsouth.rr.com

[pjv911]

As said in my post, I have 2 kits. I dont know what its worth nor is it for sale yet until my(the one i used) kit is 100% known to be good. It looks great so far and I will likely be selling the other kit soon. I am open to private offers. Use the pm option or contact me directly at kurt@digitalprovisions.com


Kurt Williams

[pjv911]

Here`s a few pictures of the install. I didnt take any of the engine once finished. I can make a 30 second QUICKTIME video if someone will host it. Of course I will boost it up to show its sound and power.

Kurt Williams









NO MORE GHL. I PUT IT ON ONE OF THE OTHER CARS TODAY. CANT BEAT THE SOUND OF THE DUAL IN DUAL OUT GHL.

[pjv911]

Made a nice custom mount for the boost gauge today. I took a sheet of .080 aluminum stock and cut it to fit my centerconsol where it used to have the usless cassette holders.
The gauge I am using is a real nice piece. It does not require me to run a vacuum hose up to the front of the interior. Instead it has a central processer which gets an electronic signal from a engine or firewall mounted boost sensor. It has a very long length of data wire which sends the signal to the gauge itself. It has a memery and a warning light built in. Also on the rear of the data link module there is a recepticle for plugging in the greddy profec boost controller and additional mappable injector controller (which have just been ordered). That way they too will not require a vacuum hose. I used a piece of door panel vinyl and glued it with some 3m adhesive to retain the look of the dash. Tommorrow I will wire it all up and see how much boost this little kit is pushing. If anyone is interested in buying one of these gauges go to http://www.greddy.com/products/electronics_frame.htm and look at part #16000802 . Its $240.00 from them but it is cheaper from outside dealers like this one for instance http://www.suprastore.com/gred60boosga.html .

Kurt Williams

[dd74]

Jeez Louise, Kurt: how long did it take you to install the whole turbo, gauge and what-not. Seemed like it was a day or two?

Can you come out to L.A. and turbocharge my SC engine?