911SC Turbo

[air-cool-me]

OH! i just noticed a random, un-used connection about an 1\2inch below the green number 1 in the third picture...hum..


I have a guy who knows a bit about CIS help me on the 4th but i want to be ontop of things..

thanks for the help!

[iamchappy]

Nick do you have the BAE manuel, I have it if you need one, I have it on pdf as well.
Dont worry about the canister and the hose running to the air box that is fuel vapor line plug it or leave it alone.
green #2 in the third picture is for vacuum booster for your power assisted brakes, and 3 goes to the vapor canister thingy.
The other 3 that is in the intake boot will go to the upper connection on the back of the throttle body.
When you remove the decelvalve there will only be one hose needed running from the throttle body to the little thermo valve.
the extra nipple on the throttle body can be plugged or used as a
below throttle plate connection for your BOV.

[kodabear]

Originally posted by iamchappy
I just received my new K27 7200, and cam driven oil scavenge pump. Due to it's design, the K27 fits much better in the 914 than the Rayjay. I should be able to mount it 6"s higher than the Rayjay. This will most definitely help with the oil drain and scavenge. I will have to refabricate the crossover pipe and mounting flange but it all should work together for an improved install. I will post the end results.

I now have a couple of Rayjay turbos that are of no use to me, My recently rebuilt one has a new compressor wheel and shaft in it, plus I have a few extra gaskets, Let me know if anyones interested in picking them up cheap as a backup or for parts.

Where did you get the weld-on K27 flange to mate your exhaust to the k27?

[Tim Hancock]

iamchappy, any chance you could e-mail me the BAE manual?

[iamchappy]

kodabear, I looked around everywhere for one with no luck, so I made it myself.
Tim Hancock, can do. it's about 4mgs if thats alright with you. PM me your email.

I work today on my intercooler fabrication and was able to get it all done,
I am using 2- 7" electric fans to pull air through and out the bottom of the trunk, I am almost ready to post the fabrication and butt dyno at 12lbs of boost.

[Tim Hancock]

PM'ed you iamchappy.

[kodabear]

Thanks, I'm having the same trouble so I guess I'll make my own as well.

[kodabear]

For Future Reference ,Tial Sportmakes SS weld-on flanges for both inlet and outlet for the K27.


Chappy, how do you like the k27-7200? Also could you email me a copy of the BAE install kit?

Jon

[iamchappy]

Jon, pm me your email.

I havent test driven the car yet I am stll fabricating a few things, I am very close.

[iamchappy]

This is what Ive been up to.
1080 CFM spearco intercooler, two 7"fans pulling air through and exiting out through and around transmission cooler, I have shielded the transmission cooler and added stainless steel ducting that I haven't photographed yet, I am also waiting for some 2.5" aluminum piping for the compressor side to the intake to eliminate most of the silicone hose and use some hump connectors to tie it all together. I still have to wire the switches for the fans and transmission cooler pump. I should be all done with it next week.

[iamchappy]

Oops, I did it now, seized the oil pump and sheared the intermediate shaft, I got the car out for a few hours and was slowly breaking in the new turbo, the K27 hits way sooner than the Rayjay and builds faster, seems like the wastegate opens pretty quick in comparison to the Rayjay, the new crossover pipe is a more efficient design and this could be also helping.

The bummer is just as I was pulling into my drive way a klunk klunk klunk sound, no oil pressure, sound appears to be coming from timing chain covers?
Up on the lift and dump the oil look inside, oh my a broken intermediate shaft and seized oil pump, looks like some of my drill particles and tap borings from my cam drill and tap job for the fabrication of the oil scavenge pump found there way into the pump, yes I am stupid.( good place for a bang your head against the wall emoticon )

The engines out and stripped down to the short block, car will be down for a few months I may look into boost tolerant pistons and cylinders while im at it, and I will take this time to get all the body work done and get the car painted and looking pretty, more to follow, Sorry we will have to wait for the butt dyno results later this summer, I only got to tease it a little in 2nd and 3rd and what I felt was all good.

[SLO-BOB]

What better way to spend Christmas than on the 911?

I'll document the process of adding my turbo on this thread seing as it's a great source of what to do. Mine will probably contribute more to the what not to do column but for posterity!



So before I begin, a few questions- Is this thing part of the air injection that needs to be abandoned per the bae manual?



and this is the underside. Ditch everything? Remove the air-injectors and weld closed or is there a better solution?



Also, time to remove all of the heater parts in the engine bay for a backdate-correct?

[YTNUKLR]

Sebring, yes, go ahead and pull all that crap out.

Instead of welding the air inj ports closed, get a plug, and loctite it in (get a high-quality allen head type fastener)

I would remove all the heater ducting, etc., in the engine bay...I have a rt. side duct if you need. I may have a left side one, too.

Are you going to SSI's+x-over pipe? or early H/e's?

Nice looking wheels and good luck!

Merry X-mas Scott

[SLO-BOB]

1:30



3:30 (doing other things too)

[SLO-BOB]

Originally posted by YTNUKLR
Sebring, yes, go ahead and pull all that crap out.

Instead of welding the air inj ports closed, get a plug, and loctite it in (get a high-quality allen head type fastener)

Sounds good-I'll do that. Anyone know what size plug?

I would remove all the heater ducting, etc., in the engine bay...I have a rt. side duct if you need. I may have a left side one, too.

Done. I'll e-mail you re: the duct.

Are you going to SSI's+x-over pipe? or early H/e's?

I think I have the 74 exhaust which I might stick with for now, but the SSI idea is tempting!

Nice looking wheels and good luck!

Merry X-mas Scott

Thanks for the help and kind words!

[SLO-BOB]

Originally posted by tsuter
1. My turbo has never had maintenance in 45,000 miles and never been rebuilt. They are very reliable however Oiling is critical for a DIY install and proper cool downs.

2. Removing the turbo or muffler/exhaust has the same challenges re: seized bolts etc. as any NA car but it doesn't need it anymore often.

3. All the other stuff - BOV, Wastegates, Inlet and outlet pipes, Enrichment injectors, switches are simple bolt on devices anyone of which can be removed in a matter of minutes for maintenance or evaluation however typically nothing would be required.

4. More typical is as a DIY install, the OWNER keeps wanting to tweek and improve the configuration and this is the normal reason things get taken apart.

5. If your car is CIS, you need to be AN EXPERT in K Jetronic because when you add an after market turbo you will need to understand in detail how fuel gets managed. If you can't tune your CIS when the car is NA you WON'T be able to tune it when turbo'd. And neither will anyone else!!

6. You will also need to be comfortable with getting rid of catalytic converters, air injection, exhaust gas recirculation, and deceleration valves, also O- sensor duty cycle modification, mechanical ignition timing, and ALL vacuum hose applications.

7. Backdating heater components to make space is required.

8. Air conditioning systems are not affected and don't need to be moved.

9. You should also not care how much it costs, or wonder if you should just swap in a 930 motor instead not because it costs a lot (it doesn't) but that should not be relevant to the decision process. A DIY turbo is UNIQUE project, a 930 motor swap is not. Are you a leader or a follower? Do you care?

In general as turbocharging a NA car is a significant modification, you need to be very well versed with how to maintain and tune your NA car first. Turbocharging is not a 3-4 day project. Getting it working correctly and reliably is more of an art and that has to be a challenge that you want.

Oh and lastly, you need a good jack and jack stands.

Thad-

Item #5 has me concerned. I've said time and again, I know jack ***** about this stuff. I'm way ahead of where I was 4 months ago, but still a beginner. Here's the question- What kind of tuning does one do to cis? I thought they were set it and forget it, simple mechanical systems.

Okay-another question-is your wastegate venting into the Fabspeed muffler or straight out?

[SLO-BOB]

Update 1/1/06

Pulled all exhaust today. I also got rid of the air pump stuff and air injectors-even though they weren't actually hooked up. I have the 74 exhaust, but I've elected to go with SSIs. My heat exchangers are pretty beat up and leak plus it would be a shame to bolt mb911's stainless works of art to a nasty old exhaust.

The biggest problem so far is I'm not sure how to disconnect the rest of the emissions crap from the right front of the engine compartment. Any tips?

[mb911]

bob. We will get that figured out it really is not that hard. Go to barnes and nobles and buy the cis guide that ben watts wrote about 20 bucks a few days later and you will have a decent understanding of it. Many will have you believe it is rocket science when it really is very simple(thad I don't mean you) . Bob you have a good understanding of electrical circuits this should be a breeze for you.

[SLO-BOB]

Ben, I was thinking about installing the 911 csv (per Tsueters rec) on the aluminum box that will replace the red boots instead of the turbo outlet pipe. Actually, I was wondering if one could add a few things to that box such as the alcohol injection for intercooling as well as the csv. Any thoughts on that?

[mb911]

sure anything can be added as they are going to be a custom box. We want to add bungs where ever there may be a need. How did thad's go?