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Old 03-07-2011, 02:16 AM   #151
cpturbo
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2004 STI
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What was the solution to the smoking issue?
Nice Build.
Awesome.
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Old 03-07-2011, 02:52 AM   #152
bettner12
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05 LGT 407hp/372tq
Tuned by mike@innovative

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Quote:
Originally Posted by cpturbo View Post
What was the solution to the smoking issue?
Nice Build.
Awesome.
Quiting...






haha i couldn't resist
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Old 03-08-2011, 01:20 AM   #153
Britain
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1974 Porsche 914
1700lb AX Car w/ Spec-C

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Spent the entire day today at Cobb Tuning Surgeline getting my car sorted out by Tim Bailey and the crew. Those guys are great and are very knowledgeable even though I tried to bring them the most off the wall project that I could come up with. They went above and beyond to understand the issues that we encountered and did not once complain or make comments about any of the work that I had done. Very professional shop that I would highly recommend to anyone.

Now...to describe the day. I arrived early and got my car strapped in to the dyno and immediately had some issues to address. First off was a bad MAF causing an surging idle. Got that replaced and then spent quite a long time trying to understand why my AIM dash would communicate with the ECU but the EcuTek cable would not seem to connect. Ended up being a ground wire that I for some reason forgot to actually hook up.

After that, we spent some time getting the air in the coolant system burped out after I replaced the coolant lines running to and from the turbo. Then, we got to actually run the thing on the dyno and determined that the boost controller wasn't functioning properly and went thru replacing boost lines and replumbing the controller. Things were looking good until at the very end the AVCS (variable cam timing) stopped functioning because the neutral position switch and the vehicle speed sensors both stopped working.

Even though we had issues, Tim was able to work his magic on a first pass tune and the car made 330hp and 285ft-lbs at 14psi without AVCS. I will spend the week understanding the faults and get back up there for another pass. I also bought some larger injectors so that we can convert over to E85 and I won't have to buy anymore 110octane leaded race fuel.

Here is a video of one of many dyno pulls that were completed.


-Britain
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Old 03-08-2011, 10:22 AM   #154
wrxtasy555
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So when are you installing the traction control?
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Old 03-15-2011, 06:54 PM   #155
scby rex
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aw, MPS 2.34 breaking in

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Figure out what was up with the speed sensors?
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Old 03-16-2011, 05:06 PM   #156
Britain
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Yep. I replaced them and wired them slightly differently. Everything works now.

-Britain
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Old 03-17-2011, 10:15 PM   #157
scby rex
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aw, MPS 2.34 breaking in

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too much voltage going to them or something?
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Old 03-18-2011, 01:55 AM   #158
Britain
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You know, I am not really sure. The fact that both died at the same time indicates that something got shorted, however I could could not find any issues with the wiring. Since I am using a hall effect sensor for vehicle speed, I decided to wire it straight to chassis ground rather than engine ground. All seems to be in working order now.

-Britain
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Old 03-20-2011, 05:07 PM   #159
JRust
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I can't wait to hear how your first day a the track went. Really want to hear the difference between the 2 motor's. Especially how it changes the way you drive. I was down checking out the track for WCR yesterday. I've got some info on it for you too
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Old 03-20-2011, 11:21 PM   #160
scby rex
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aw, MPS 2.34 breaking in

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Maybe too much resistance going to the engine ground?
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Old 03-23-2011, 05:51 PM   #161
Britain
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Yea, maybe...but all is good now that I have separated the sensor from the engine ground. If the weather holds out, I will get to drive it this weekend.

-Britain
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Old 03-24-2011, 01:36 AM   #162
Renaku4
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Just took the time to read this whole thread, and gotta say, nice job man. Awesome job on all the fabrication you did as well.
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Old 03-24-2011, 01:52 AM   #163
Britain
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Thanks.
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Old 03-25-2011, 02:33 AM   #164
cpturbo
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Quote:
Originally Posted by cpturbo View Post
What was the solution to the smoking issue?
Nice Build.
Awesome.
Any answer to this question?
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Old 03-25-2011, 02:50 AM   #165
Britain
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There were two issues. First, I mounted the turbo a little two low and the oil was not properly draining into the oil pan. To fix this I added a scavenge pump the the turbo drain. The second problem is that the oil level with the additional 2quarts from the accusump is most likely above the bottom of the cylinders which is not good. I just need to make sure that the accusump is properly operationed in relation to the engine (i.e. closed when the engine is off). I took the muffler guts apart and cleaned out the whole system and all is good so far.

-Britain
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Old 03-25-2011, 05:22 PM   #166
crimson ghost
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Lots of good info in this thread !!!!!
Thanks
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Old 03-29-2011, 11:10 AM   #167
xpingux
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If you own a 914, absolutely!
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Old 03-29-2011, 11:23 AM   #168
crimson ghost
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Quote:
Originally Posted by xpingux View Post
If you own a 914, absolutely!

No 914, but a Karmann Ghia with an EJ20.
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Old 03-29-2011, 11:47 AM   #169
Britain
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Thanks guys. I hope that there is good info in here not only for 914 owners, but for those working with JDM engines. I will post some videos when I finally get to drive it in dry conditions. I tried this past weekend in damp/rain conditions and it was insane.

-Britain
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Old 03-30-2011, 12:33 AM   #170
RSti_Spyder
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I am happy to pick up some ideas and mine is a US 04 Sti engine in a Meyers Manx dunebuggy. It's all good!
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Old 03-30-2011, 12:55 AM   #171
wrxtasy555
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Is the engine swap you did something people do in daily drivers or is it more of a race car thing?
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Old 03-30-2011, 02:09 AM   #172
Britain
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There are several 914's out there with Subaru engines, mostly WRX engines but a few STi's out there.

-Britain
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Old 03-30-2011, 09:12 AM   #173
Jaxx
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so did you retune?
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Old 04-03-2011, 12:54 PM   #174
JRust
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Did you get to AutoX it this weekend Britain? I'd really like to hear how different things went with the suby powerplant.
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Old 04-07-2011, 02:36 AM   #175
Britain
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Few updates.

I was having some issues with the Vehicle Speed Sensor set-up. I did a sort of shotgun approach to addressing the issue. I converted from a solid state hall effect sensor with the magnets in the trigger wheel to a proximity sensor and a notched trigger wheel. I also installed an ignition relay for the rear fuse panel instead of running straight through the master switch. I believe that I was getting voltage spikes when starting the car which may have cause premature death of the sensor. Either way, the combination proved reliable and ran all weekend without issues.

Here is the new Vehicle Speed Sensor installed with trigger wheel that I had cut on on the waterjet.



Clearance between the VSS and the trigger wheel. Spec is 1.5mm and because it is threaded, it is fully adjustable.



Also installed a pair of Tilton master cylinders. Previous set-up was 22mm front/19mm rear and the pedal pressure was significantly too high. New set-up is 18mm front/16mm rear which is still a bit high, but much more manageable. I currently run 911S aluminum front calipers, but I plan to switch to boxster calipers in the future.



Ran the car this past weekend at a Test and Tune event in Eugene. Mixed weather conditions made set-up difficult, but we got some good shake down runs in without any major issues. Need some more time to get the brake bias correct and we had a slight issue with the hydraulic clutch, but I suspect it needs to be bled better.

Just in case there was any question...the car is much faster than it used to be.

I will get some video and pictures at the next event when I am not spending all my time working on the car.

-Britain
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