HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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1987 944 Turbo --> LS

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Re: 1987 944 Turbo --> LS

Post  chrenan on Wed Apr 11, 2018 1:13 pm

Rothaus wrote:

Silly question. Did you get the hydroboost system from TPC, and did the set come with all lines and connections for the hydroboost and steering rack ? I'm asking bacause I cannot get an answer from TPC.

Thanks
Engelbert

Yes from TPC.  It came with all the hoses and fittings, however they were loose, as in I had to make the hoses myself by cutting appropriate lengths and attaching the hose ends. Also, I only have hoses and fittings for the braking system as I run manual steering, so no hoses go to my steering rack.

chrenan

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Thank you

Post  cazbah362 on Sun Apr 15, 2018 10:11 am

Chrenan -Thank you for all the photos and detail on your build, has helped me a lot! Couple of questions, for your oil/water gauges, how did you run the wiring? I am doing an 85.1 build, and noticed all the wires go into the computer. So my assumption is to run switched power to them?

Also heater "H," where did you put that, I see many putting it on the passenger fender next to the header?

Again, thank you.

Charles

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun Apr 15, 2018 2:30 pm

Glad it’s helping Charles, I’ve relied on others here heavily so happy to give back.

cazbah362 wrote:Couple of questions, for your oil/water gauges, how did you run the wiring?  I am doing an 85.1 build, and noticed all the wires go into the computer.  So my assumption is to run switched power to them?

Pretty simple on this one. One wire from the coolant temp sensor on the passenger side head goes to the 944 14-pin connector (the main harness connection near the brake booster). This sends a signal to the stock coolant temperature gauge. Two wires from the oil pressure sender go to the 944 14-pin connector. That sends a signal to the stock oil pressure gauge. That’s it. I can’t remember exactly which pins in the 14-pin connector, and they may be different between my car and yours.


cazbah362 wrote:Also heater "H," where did you put that, I see many putting it on the passenger fender next to the header?

I’m running vacuum to the HVAC controls so I can have ventilation defrost on track, however being a summer track car I don’t need heat. So in the interest of simplicity I’m running a loop hose on the LS water pump and no coolant gets sent to the 944 heater core.

chrenan

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sat Apr 28, 2018 8:41 am

LS2 in and started! Around 4 bar cold idle oil pressure (58 psi) dropping to around 3 bar (43 psi) once the oil warmed a bit. No bad noises. Still lots of little things to do, but a big step.

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Re: 1987 944 Turbo --> LS

Post  cazbah362 on Sat Apr 28, 2018 10:39 am

Chrenan,
Congratulations! nice video, so is that the same same exhaust you showed in the build or did you do something different? Reason I am asking, I am doing mine now, yours sounds very calm in the video. My approach to my exhaust is something that I can take to a track and not blow the decibels out, nice around town, and sleeperish, but will handle decent HP.

And thank you for the response on gauges, yes it turned out to be very easy.

Again - very nice build, I bet you cant wait to take it out for a shake out drive - please keep us posted, watching and learning.

Charles

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun Apr 29, 2018 8:55 am

Thanks Charles, I appreciate it!

Yes same exhaust as shown above, long tube headers into a Y pipe then a braided flex pipe connection to a 3” exhaust out through a Pypes M-80 muffler. Poor iPhone video sound aside, at idle it seems fine and not overly loud. I’ll report back once I’m able to really find out.

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Radiator Question

Post  cazbah362 on Sun May 06, 2018 8:35 pm

Chrenan - quick question, I bought a radiator like yours from TPC, but was unclear on where to plug the hoses up on the drivers side from the tank. From what I can tell are the two small holes are a for the automatic cooler? and then there was a capped large hole? so how did you run your radiator hoses?

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun May 06, 2018 9:48 pm

Sure. Passenger side is simple, top of water pump to top of rad and bottom of water pump to bottom of rad.

Driver side of the rad has three ports. The very bottom is the drain petcock. The very top is also a petcock which I don’t use, I just leave it closed. The other, larger, top port is 1/4 NPT threaded. I installed a hose barb fitting into this port then connected it to the bottom of the 944 Turbo expansion tank. (I just snapped some pics of this I can text or email them to you if you send me your contact info). I blocked the other large port on the 944 Turbo expansion tank - not required if you have a normally aspirated 944 expansion tank. I connected the steam vent line from the front of the LS to the small connection on the underside of the top of the 944 Turbo expansion tank.

chrenan

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Build Prcocess

Post  cazbah362 on Fri May 25, 2018 9:04 am

Chrenan,
Thank you for help on the radiator, once I got into it pretty simple - especially with your insight. My build is going well, except ran into a problem with the slave/throw-out unit leaking like a sieve. Since my car is a NA, I have a 5P transmission sitting around, so I will replace the slave and now install the 5P as well. Frustrating but life.

Also, when I start the car, the brake pedal goes to the floor? I have not bled my brakes since install, so I figure may be the issue. I double checked all the plumbing, looks correct and no leaks - so....

How is your build going? are you driving it yet?

Thanks for help.

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sat May 26, 2018 9:03 am

Glad to help Charles. Getting closer with mine, was struggling with hard starting with mine, went through everything I could think of, sensors, fuel pressure, spark etc. All the basics and couldn’t solve it. Finally found a connection from my standalone harness that needed 12Volt while cranking and wasn’t getting a clean 12Volt when cranking. Fixed that and it starts much happier now! Need to clean all my wiring up now though as I really had to dig into it.

Was your slave new? Any idea why it spring a leak yet?

chrenan

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Unknown

Post  cazbah362 on Tue May 29, 2018 8:50 am

Chrenan - You have to love those wiring gremlins, they can be a pita, and happy you finally found it, I bet it lifted a load. So when will you get to take her out for a shakedown run? Two things in a build I love, firing the engine and taking her out for a shakedown runs.

As for the slave - not sure what made it fail. Yes, it was brand new from TPC? I could have banged it on something, could have been faulty? I spent a few night tightening fittings. Luckily I have the corvette bell housing that has the inspection cover. Tight fitting, but allowed me to rule out a loose fittings. I will start replacing that this week, I believe. Also - Kent of TPC was way supportive on this issue (and many more). He helped troubleshoot it and also is sending out a replacement. I need ti give him and his company huge plugs in this build, totally supportive and collaborative dude. THANKS KENT and TPC.

Also, I found out a FAST 102 will in no way in HELL fit under a stock hood unless you are willing to cut it, which I am not at this time. With that said, I ordered a stock LS6 intake to replace it. I see you changed intakes as well, what was the reason - more power? and what was your final hood clearance?

Again - thanks for helping, please keep posting - learning vicariously and with your help!

Charles


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Re: 1987 944 Turbo --> LS

Post  chrenan on Tue May 29, 2018 4:22 pm

Switched to the LS6 intake when I got the LS2 long block, I figured it deserved a slightly better flowing intake. Actually just working on hood installation now. Should have lots of clearance as I’m using a Fiberglass cowl hood from IFC. Originally I was going to run without the cross member spacers, so I’d need a cowl hood for clearance up top. Everything fit without the cross member spacers, but the long tube headers were too tight to the floor for my comfort. So when I installed the LS2 I used the spacers, but I figure I might as well use the Fiberglass hood to save a few pounds anyway. Hope to be out soonish.

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Re: 1987 944 Turbo --> LS

Post  chrenan on Wed May 30, 2018 2:06 pm

Hood Fitted:

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Hood Quality?

Post  Jchard944 on Thu May 31, 2018 7:55 am

Been poking around getting one of these hoods for some time now.

How did everything come together? A lot of rework needed or were you pretty happy with everything out of the box?

Car looks great by the way!

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Re: 1987 944 Turbo --> LS

Post  chrenan on Thu May 31, 2018 9:42 am

I've seen a few 944 fiberglass hoods in person, and I would rate this one very good. However, it is still a fiberglass body panel designed for a race car, if you are expecting OEM fitment you'll be dissappointed. I only had to trim 2 small areas by the wiper arms on the trailing edge of the hood, it was catching on the wipers when raising and lowering the hood, the interference could not be adjusted out with the play available in the hood arm mounting holes. I'm pleased with it, but my car has a lot of patina from sitting in the Japanese sun for most of its life. Rust free but sun baked it sort of its vibe, it isn't going to win a beauty contest so the hood doesn't really stand out Very Happy

chrenan

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Re: 1987 944 Turbo --> LS

Post  chrenan on Mon Jun 18, 2018 11:38 am

Went around the neighbourhood a little bit then to the track for a few relaxed shake down laps.




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More Questions

Post  cazbah362 on Sun Jun 24, 2018 9:39 am

Chrenan - Very cool, how was the shake out?

So question on steam port return - where did you run yours? I ran mine from #1 side to the radiator overflow line, seemed logical. However when it warms, it pisses out the fluid in the tank? Any insight on this?

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun Jun 24, 2018 10:43 am

Shakedown went well, kept the rpm relatively low and lots of engine compression braking to help seat rings. Temps were good the whole day and even crawling home in traffic in the late afternoon heat. Oil pressure was good even on the banked turn we have on our track.

For the steam vent I have the back 2 ports on the block capped. The front 2 are connected with a stock GM tube, the exit on the tube is on the #2 side of the engine. The hose from here runs to the little fitting on the stock 944 Turbo expansion tank under the top edge toward the back of the tank. What radiator are you running?

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Vent response

Post  cazbah362 on Sun Jun 24, 2018 11:13 am

I am running the large radiator from Kent. Also, my car is a 85.1 NA, so no tank on #2 side. Sounds like we have the same general setup. I also capped my back two ports and used the factory front vent lines using the factory LS2 (2005 GTO) setup. I did a quick search here and see a few topics, I believe my setup is correct, now just need to see why it pushes the fluid out of the tank. I may get one of the Trick Flow TFS-306SB601 and install it - overkill, but.....

So are you impressed with the car in contrast to the factory turbo setup?

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun Jun 24, 2018 12:23 pm

My expansion tank is on the same side as yours, I just run a longer hose from the #2 side of the engine over to it. Same radiator as you, I just leave the very top little fitting sealed since my steam line is to the expansion tank. That’s strange that you’re overflowing. Any chance it’s a head gasket issue?

The car goes like a scalded cat with only partial throttle.  Very quick and the engine has an overwhelming feel of “understressed”.

chrenan

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Radiator Question

Post  cazbah362 on Sat Jun 30, 2018 9:44 am

Chrenan - I guess I am in the process of ruling out the possible head gasket issue, this is getting a little perplexing and I appreciate you allowing me to vent. My issue is I installed fresh 243's on this 5.3 with new gaskets. I could have installed them incorrect. Interestingly a new symptom has arose, there is a squeal from the front of the engine (really it could resonant anywhere in the engine, just hearing it loudest at the front). So I am thinking either (from best scenario to worst) front timing has come loose and is rubbing on cover, lifter has rolled sideways or bad bearings. Oil pressure is good and don't hear a knock and to date have not checked oil or filter for shavings or pulled intake and valley pan to check lifters.

The squeal presented the other day and went away, I actually thought it was the belt. It started again yesterday, so I figured I would pull the belt to double check, when I realized (or better, accepted) it was internal. Also between first squeal and now I have changed water pump, re-routed the streamline to the top of the water pump and bought a new cap. On a side note, the temp gauge does not show this engine overheating, it just touches the black on high side (220ish). Also, I have a factory PCM, and the temp settings where not changed from factory settings, so fans don't kick on until high.

With squeal aside, I still need to figure out the overflow issue, I do believe they are separate (possibly). When I went to Napa to try a new cap, the salesman pointed out the new Behr cap I have been using has no gasket. I purchased a 16 lb generic brand with a gasket. It did help a little, but still overflowed and more out of the cap area this time. One thought is my expansion tank is old and the sealing lip is worn off and I definitely can not see fluid from so much build up.

Next plan of action, I ordered a new tank. Also, I will pull the front cover off and check for best case scenario. And, I will find someone local to either re-set the PCM for lower temps or wire to fully run through test to check for overflow/overheat. Again, thanks for your help and insight, will keep you posted.

As for your car, any changes you need to do? or did it go out and run flawless? What are next steps for you.

cazbah362

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Re: 1987 944 Turbo --> LS

Post  chrenan on Sun Jul 01, 2018 9:08 am

Could be a failed lip on the expansion tank. Another option is to pressurize the cylinders one by one and look for bubbles in the expansion tank with the lid off. With fresh heads and head gaskets though it seems unlikely it is a failure already.

Was at the track again yesterday, pushed a little harder than the first day, lots of fun.

After the first track day there were a few loose coolant clamps, they are all new so hopefully it was just the heat cycle loosening them and not a crappy brand. The sealant I used on the oil line fittings coming out of the pan seemed to have not worked, there was oil weeping there, so I pulled and re-sealed with a different product. The AN fittings at my hydroboost fluid cooler were also weeping, a bit more tightening on those seems to have fixed that. The most annoying thing happened yesterday. For the last few years my gas guage has been flaky. It will jump to read full over bumps, if I tap the dash with my palm it will return to the correct reading. On the weekend my stock coolant temperature gauge started doing the same thing. There must be a bad ground back there or something loose in the guage cluster. I’m going to run an aftermarket VDO temp gauge for the summer and dig into the guage pod over the winter. I hate wiring and electronics.

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Re: 1987 944 Turbo --> LS

Post  chrenan on Mon Jul 16, 2018 6:52 pm

Alright guys, after about a month of running and not that many miles, this coolant temp sensor is deader than a door nail. Has anyone experienced this problem? It’s mounted in the rear of the passenger head. I’ve ordered another one to replace the dead one. Should I shield it given how close the coolant sensor mounts to the header? Maybe put a spark plug heat shield sock around it? No idea why it would fail so soon.

chrenan wrote:Coolant temp sensor arrived that fits the existing threaded hole on an LS head and works with the stock 944 gauge.

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Re: 1987 944 Turbo --> LS

Post  chrenan on Wed Jul 25, 2018 12:07 pm

Ordered a new temp sensor, exact same one. Works fine (for now?). I put some fireshield hose around the sensor to keep the heat off it, hopefully it lasts longer than the previous one.

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Re: 1987 944 Turbo --> LS

Post  turbobob924 on Tue Sep 04, 2018 11:15 pm

Keep plugging away

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Re: 1987 944 Turbo --> LS

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