OK, I have been researching 914 brake rebuilding and found a really good video on the subject… at least for the rear brakes. If you have never rebuilt a brake caliper and are inclined to mechanical projects, this is one you can really sink your whatever into. I thought it was going to be relly hard and complicated. Granted I am not finished yet but as near as I can tell the whole premis of rebuilding is replacing old seals and a lot of cleaning. Then if you put it back together and dont have any leftover parts you have done it right. Word of caution, If you have leftover hardware besides the seals and clips and things you have replaced, do not install the brakes on the car. I have not had this experience but, it makes sense. The first link is to the you tube video I have showing the 5500 RPM in second gear. My friend Michelle of Dave & Michell fame filmed it after we recovered her daughter’s 65 Mustang from the side of the road were she ran out of gas. She filmed the second trial run of the car. The photo is of all of two rear break calipers torn down and all of the tools necessary to do it. I only have to assemble and adjust them and I will have a just like new set of brakes. Wow! that is great. Today I also had to restructure an adapter from 8mm 32 to 3/8 24, which as you can see I accomplished… or maybe you can’t, I guess you’ll just have to take my word for it. The question is how will it perform in a function test. THAT is a huge question and one I will definetely be doing over and over again. We are talking about a brake system here. I don’t forsee any problems in that I have conformed to specs and have not taken any shortcuts. I don’t take chances when it comes to brakes. The safety of all in the car and in my path depends of that fact.
Keep On Pluggin
Good evening all whoever you may be, I have so much to say! I better take a deep breath and start from the beginning. Two weeks ago I had fished some wires through to the console and was waiting for Dave to come over to help me with the brakes. Well he did. We soon came to the conclusion that we weren’t going to be able to do them comfortably in my garage. Dave suggested going to his house, getting the trailer and taking the car up there so we could put it on the lift. Smashing idea, and we did just that. Ah but I get ahead of myself. Back in my garage we moved the cars that needed to be moved and cleared a space for the trailer and the 914. The plan was the 914 would roll off the ramps and down the drivewayand up onto the trailer. We pulled the chaulks and Dave pushed and I got in and steered. When the car only rooled halfway down the ramps and stopped, we realized the brakes were locked up and now it was a really good idea to get the car to Daves. One we finally did get the car up there I pulled all of the brakes and checked all of the wheel bearings. I dismantled all of the calipers and put all four of them in my car. I figured I could work on them at home. This turned out to be a good idea because of what happened next.
I had to order brake parts and while I was waiting my DC/DC converter arrived in the post. I installed it and wow did that work out great. So now I have Tunes, Bluetooth, lights, horn (for blind people), and my cooling pump. At this point I decided to hook up the necessary wires to make the darn thing go. The schematic says if your car normally goes in a clockwise direction use the white Fwd wire, conversely if it goes counter clockwise use the yellow Rev wire. I hooked up the white wire and turned on the ignitionengaged the clutch, put is in gear (remember its up on the rack). My wheels were turning at about 8 rpm and backwards. I figured OK 50/50 shot and tried it with the yellow Rev wire. This time the wheels went the right direction. I then gave it some throttle and it stopped. Let go of the throttle … It goes 8 rpm. I consulted the manuel to make sure I had the throttle hooked up correctly. None of the schematics matched my type of throttle. I found the programming section in the manuel and sat down to program my car. Since I had ordered a DC/DC converter from EV West I thought I would give Matt Haurber a call and let him know how things were going. I told him about my throttle problem and he gave me a pointer similar to the one Jack Rickard at EVTV had given me. This time though I was sitting with the manuel (ipad) and programming through the Spyglass program.
With a series of commands executed by pushing a little red button I could go through the seven different parameters and progam specifics within each one. I started with the throttle. The manuel said there were three types of throttles. Type two and Type three and Type one for electronic throttles. When I got to the first question it was Throttle Type… the choice were Type1, Type2, Type3 hmmm I chose Type1 because niether of the other two worked. Now I could get 31 rpm. Then after a ittle more programming my contacter quit. It never occured to me that I could have shut it off with a program setting, so I wrote an email to Jack Rickard and asked him what he thought might be the problem. To my suprise he called me the very next morning, mind you he had no idea at what stage I am in my build. He asked me some questions like did I use the relay they sent with the motor controller kit, I said what relay? (I hadn’t had my coffee yet.) I used one from the Porsche, I just rewired the rear relay panel to work for my needs. Then I told him that the car is not here and I could call him back in a few minutes from the car. He said ok call me back and I did. Once we were troubleshooting on the car in real time I think he was pleasently suprised to discover that I had the spyglass hooked up and could do programming and diagnostics. My relay idea made more sense as we went along. We spent a fair amount of time on trying to figure out what was wrong with the contacter until finally we both had to go. Jack sent me an email and told me that he would contact HPEVS in the morning and that there was a possibility that I may have gotten a bad program. I braced myself for the worst having to trailer my car to Onterio CA for a reprogram. I went home and made spagetti with a mushroom wine sauce and just tried to relax.
The next morning Jack called and had great news. He said there are two parameters which can turn on and off the contactor. Wow! We talked a little more and I finished my coffee and drove up to Daves place. I checked both parameters reprogrammed one and tried it again. This time the contactor engaged, although I could still only get 31rpm. I called HPEVS myself and spoke with Brian. I told him about the parameter I changed and said he had spoken with Jack earlier, then I told him the rpm problem and without missing a beat he said “Oh your controller thinks the motor is going backwards!”; “Huh?” I said. ” Yeah, your motor is out of phase, just pick any two of the phase wires on the motor to the controller and swap them, and if you changed the Fwd wire to Rev change that back to Fwd as well” I did, it worked I have a car… without brakes, well without three anyway I just finished rebuilding one… Funny, I can go but I can’t stop.
Keep On Pluggin
It is Thursday and I am waiting for my friend Greg to come down from Stockton. We have a busy day planned making brackets for the battery boxes. I have them fitted somewhat the way I want them and we are going to make it permanent today. Let me restate that, My plan or design is to be able to drop the entire drive train with the battery racks still attached very similar the original Porsche design. This may require the removal of the blower bracket. The bracket is pretty useless at this point anyway as it is about 2″ from the drivers side battery box. I may also have to slightly modify the gasket rail where the old gasket for the ICE motor once resided, and I am definitely going to have to modify the old battery tray. My biggest concern is whether or not I will have to modify the motor and adapter so that the terminal box doesnt interfere with the battery box and vice versa. By the end of the day we will know. Of course I will be filming highlights for the next movie. We are starting at 0800, so by the end of the day we should have something complete.
Keep On Pluggin
I decided to do a promotional video for Keep On Pluggin and the walk around for the Porsche. I didn’t want it to be your average guy walking around a car and expaining what he was doing on the car. This is the first of a series of films (videos) I will be undertaking to show the progress of this build. I do hope you enjoy it… If you do please leave a comment thank you
The Walk Around Movie
Keep On Pluggin
I forgot to post this… I also submitted to West Steel and Plastics the drawing for my newly designed controller mount. The mount will be bolted to the front of the motor between the motor mount and the face of the motor. Right now I have spacers in the location just stated. The mount wil be installed so that the round part is 180 deg from the motor mount coming to a bend which will allow the mount to clear the battery boxes. then another bend and the whole thing widens into a table so as to be able to acommodate the chill plate and controller. there will be a tab cut out to mount the throttle position sensor. This tab is accomplished by cutting along the dotted line and bendingall but the tab 90 deg downward so that the end can rest on the motor adapter.
Today I configured on paper the 3 High Voltage Battery Packs connections to one another as well as within each box. This one looks good to me because the most positive and most negative terminals are on either side of the motor and controller. This means less cable will have to be used and therefore less current loss. Take a look for yourself… let me know what you think… I’m going to go have a beer.
Keep On Pluggin
Today is Tuesday OCT 1 2013 and I fell asleep watching the Beatles Anthology when suddenly I was awoken with an Idea. Hypothysis… why can’t I use the fuel pump system for a cooling system for the Porsche 914, or any other vehicle? This would eliminate having to re-plumb the car and obviously there would be an already plumbed former fuel system to tap into on any former ICE vehicle. It is now 2240 hrs and I am excited about this prospect. I have just hooked up my fuel pump to my power supply at 5 volts and it ran just fine! Of course my hands smell like old gasoline and I will have to research why there are three orifaces on the stock fuel pump, but I think I may be on to something. Why can’t we pump Ethylglycol and H2O through the same system? Maybe it’s the gas fumes … but I think this may work! I will let you know…
Keep On Pluggin