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Join Date: May 2010
Location: atlanta
Posts: 1,982
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That starter ring gear got Hot !!
What are the holes for in the gear? They sure don’t leave much meat left. |
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Join Date: Mar 2011
Location: Minneapolis
Posts: 404
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Quote:
Some of this is getting ahead of myself, but this was the ring gear Patrick Motorsports told me to buy. It's for an early 75-77 930. It wasn't until after this that we found out that the only difference between the early and late 930 ring gears are the holes for the limit pins that the early 930 pressure plates have but the later ones don't need. The Patrick Motorsports pressure plates also don't need the holes for the limit pins (which are in the completely wrong spots to be functional anyways. It's just a comedy of errors, some are my fault, others are from advice from others, all could have been avoided. And I'll explain more whenever I get a chance to write the next post. Hopefully this will help others doing a shortened G50 swap in the future and avoid the problems I ran into.
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Join Date: Mar 2011
Location: Minneapolis
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Overcrest in the Rearview
With Overcrest in the rearview and the avocado back in the garage, I set my sights on just being a dad for a bit and enjoying the fall weather and color change.
![]() With a few weeks recovery time, I started to come out of my cocoon a bit. Over the last few years I’d started to accumulate so much stuff that we weren’t using the same when we were in Los Angeles (I've driven the C10 1,700 miles in three years) so I started a purge. Finally detailed and put the Q5 TDI up for sale (which has since sold), detailed and put the C10 up for sale (November is a terrible time to sell something like that here, not currently sold), and in a commitment to getting the cup engine in the car, I put the 3.6, 915, and the other G50 up for sale as a “hot rod starter pack” in the classifieds, link here: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1169812-fs-hot-rod-starter-pack-964-3-6-engine-swap-rebuilt-915-rebuilt-g50-goodies.html ![]() 3.6 coming out for the last time: ![]() ![]() The 3.6/915 sold relatively quickly, but it was still in the car, so I had a mad dash in November to get it torn out, cleaned up, and packed up. This also meant we got to see what carnage ensued on the rally with the starter ring gear… ![]() ![]() ![]() I will say that I have run into so many dumb things while building this car. Also, aftermarket parts that have been on the scene for probably decades, so how am I now just the one experiencing these problems? Unanswerable… I’m using a Patrick Motorsports Clutch, Flywheel, and Presssure Plate which is designed to be used with a shortened G50. As expected, once the engine/trans were separated, you could see that the brand new starter ring gear failed at one of the holes machined for the pressure plate limit pins (that an OEM Sachs clutch needs to function). Dumb thing #1: when installing the starter ring gear onto the pressure plate, none of the limit pin holes lined up with the limit pins on the Patrick Motorsports pressure plate. Dumb thing #2: I was later told that I had the starter ring gear mounted upside down (even though this way the ring gear limit pin holes were at least near the pressure plate limit pins. If I had mounted it the other way, the limit pins would have been completely blocked. Dumb thing #3: I was then told that you need to first line the limit pin holes and then only use 6 instead of 9 bolts to mount this to the flywheel… that doesn’t seem right. Dumb thing #4: I was then told that dumb thing #3 was actually incorrect, the limit pin holes for the early sachs pressure plate are irrelevant for the patrick motorsports pressure plate, which means you can actually use the later 930 starter ring gear, which doesn’t have the limit pin holes, and gets rid of that failure point. Even typing this right now is starting to make me feel extremely frustrated again. The advice/misinformation cost me enjoyment of a fun weekend with my car, thousands in transporting my car back home, and a giant groove ground into the bellhousing of my brand new transmission. They’re all things that could have been avoided with the correct guidance to begin with. So for any of you reading this that may be embarking on installing a shortened G50 into your G-body, just use that later starter ring gear and avoid the headache the early one may bring. The day after I removed the 3.6, I installed the flywheel, clutch, pressure plate, and later 930 starter ring gear to the cup engine, mated the G50 to it, and put it back in the car. ![]() ![]() ![]() That’s how it’s sitting as of today, I’ve looked at it a few times but have had trouble building the motivation and finding the time to work on next steps, which I feel are:
All this to say, I was initially super happy to sell the 3.6/915 but now I’m regretting it a bit. Like I mentioned above, I’m finding it hard to find the motivation/time to do all of this. I’m a different person in a different place than I was when building the majority of this car. Even when I initially picked up the Cup engine, I wasn’t even a dad and had no idea what sort of effect that would have on my time. I find myself pining for a water-cooled chassis to swap all of this into (or honestly just sell it all and search for a GT3). I have pretty much all the parts (less a GT3 transmission) to swap this into any 996/997 chassis. I really enjoy the dynamics, look, and slightly more modern appeal of my 997.2 C4S now that I’ve owned it for a while. I waffle back and forth on a day to day basis and that alone is pretty exhausting. Chris and I have discussed this quite a bit, these cars are so much fun and we’ve made so many friends as a result but the constant need to improve the damn thing to suit our desires is pretty exhausting. And it was honestly a pretty great car as it was but I couldn’t help myself when that cup engine popped up for sale locally, ugh. Anyways, who knows? thanks for listening/reading. Part of building the car and this thread is to just put my thoughts out there as a form of therapy. If Gabe at 10 years old were looking at his life now, he'd slap him for considering making all these changes, just because. So yea, this is where the car sits as of today. I’m open to thoughts, opinions, and general discourse. Cheers.
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Fastest Hunk of Junk
Join Date: Jun 2014
Location: ATX
Posts: 669
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Long-time thread follower, first time commenter. But this last update hit me in my bones, as the father of a 2-yr old (our first) and 7 cars in the fleet, 5 of which are old/projects.
I'm in the exact same place as you, and although my 3.2 is still pretty stock - I am also considering selling an old truck and several BMWs to just chase after a 996 GT3 to cover daily(ish) and track duties. Especially if you are actually into your kid(s), time hits very differently once they arrive.
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Great stuff! I will enjoy seeing what you come up with for cooling.
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Gabe,
Balancing life and projects is a challenge. I have a 1.5 year old son and soon to be 7 year old daughter and am attempting to follow a similar route with my 1972 but I've admitted to myself it'll be a years long project. I think it helps by breaking down the entire process into little steps which you can complete in a reasonable amount of time, and then step away from the project for a bit while you focus on what is important - Your family. You still have a fun car to drive, albeit not quite as special as what you're building will be, so just try to be patient. It's not easy, we all have this vision of what our cars will be when complete, but unless we do this professionally and have kids who are grown, it's generally not reasonable. Take that 997 out with the family and pick up your project again when you've found a renewed sense of vigor for it.
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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It's worth noting that KEP which is machined into the pressure plate stands for Kennedy Engineered Products. From your description I was expecting to see "PMS" on the pressure plate. Which stands for something else.
Were you being told all these dumb things by PMS, not KEP? I already have a relatively low opinion of PMS, but am considering a purchase of a clutch from KEP.
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Heavy Metal! Part Deux - The Carbon Copy Project Heavy Metal https://tinyurl.com/57zwayzw (SOLD) 85 Coupe - The Rot Rod! AX beater Quality Carbon Fiber Parts for Classic 911s: instagram.com/jonny_rotten_911 |
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I look upon the GT3 oil tank with fascination. Is theonly oil cooler needed for it the engine mounted oil/water heat exchanger? I like symmettry, and a rad for each corner sounds appealing. The battery bulge might not get in the way as much as you think and the subsequent clearancing might not be too bad. I do also like the idea of using the factory hard lines, if they compare favorably to the GT3 line diameter. In the end though it might be easier to fab up new lines.
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Heavy Metal! Part Deux - The Carbon Copy Project Heavy Metal https://tinyurl.com/57zwayzw (SOLD) 85 Coupe - The Rot Rod! AX beater Quality Carbon Fiber Parts for Classic 911s: instagram.com/jonny_rotten_911 |
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If you have not already done it, look at Rennch's you tube channel on his Suburu engine swap. He has worked out some of the cooling issues with nice radiators for his 911 and may save you some time going forward.
All projects go through ups and downs as life changes. I have found the process much more gratifying than the finished product in almost all my car projects. |
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Join Date: Mar 2011
Location: Minneapolis
Posts: 404
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Ahead of this, I've been (functionally) dealing with burnout since we moved and I know a big part of this feeling is just wondering what it's like to not be thinking about car stuff when I come up for air. It is/was an outlet I enjoyed but when you're in the thick of it in massive projects like this one, I just can't help but wonder what it would be like to just not have it. Quote:
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This car probably wouldn't even work without the parts that PMS has so while everything I said above is extremely frustrating, I'm still appreciative that the stuff exists. Quote:
IIRC, there is ~8" clearance on the driver side and the CSF cooler is 9" wide and quite thick. I think this is the biggest hold up for me right now. If I were able to clearance and mount these coolers I'd probably find the remainder of the motivation needed for the rest. I'm debating reaching out to the fabricator/welder that helped fix the Cup engine case. I don't mind subbing a few things out if it means it gets done better/quicker. I like the idea of the prefabbed existing lines because it would also look OEM. I have the cup lines too which are aluminum, they are a bit thicker but I think could be made to work pretty easily. I'd need to get turbo rocker covers to hide them though. Quote:
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love this idea and the home grown engineering it requires. Before going any further, just want to be sure you have spoken with race shops about this motor. My understanding is the 991 cups (primarily 991.1) had significant cooling issues that would preclude street driving. They couldn't idle for more than a couple minutes without overheating and even had issues on pace laps....cars needed to be at race pace to adequately cool the engines. This may have already been solved via rebuild changes, but something you should research (if you haven't already).
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Join Date: Mar 2011
Location: Minneapolis
Posts: 404
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Quote:
If it doesn't work and ends up being an unsolvable problem, I'd imagine someone with a Cup car would be interested in all of what I've acquired and I could go back to something similar to what I had. It's been on my mind anyway. Time has been pretty limited and even when I have had time, spending it with my daughter, wife, and family has really taken priority (by choice). So as this has stalled and anxiety over little pieces of this puzzle have picked up I've been debating parting ways with it all and picking up something I can just get in and drive for a few years while this chapter of my life takes a pause. Sometimes I just need to sit and stare at the car for a bit and mull it all over. At times I wish I hadn't parted with the 3.6 prior to getting the cup engine going. That was my initial plan but it's taken longer than intended and after the Overcrest rally debacle, I just needed to shed some weight. Hitting the easy button to allow myself to just pause on this and not make any crazy changes, would be nice. While all of this has been rumbling in my head, I made it over to the garage last weekend... ![]() and finally washed the car after the rally in October: ![]() ![]() It has such incredible hips. ![]() I sat in the drivers seat for a while, contemplating life's choices. ![]() And then unwrapped the full 991.1 cup chassis harness that I've had sitting in a box for 1.5 years. ![]() It's a beautiful motorsport piece and has way more wire and features than this car needs. ![]() ![]() Things as little as figuring out which deutsch connector I need to wire up the fuel pump, confusion on the size wiring that Porsche specced for the fuel pump wiring (it looks like 16 gauge) which doesn't have much ampacity. Realizing that the connector is ~$100 just to see if this will work, not really knowing which pin is power or ground, not having the pinout of this wiring harness and lack of information (I could do a partial pinout myself but as an example of how much time that would take for just those connectors, there are 4 possible pins on that fuel pump connector and 16 on the PDM)... It's all contributing to burn out on this. ![]() I've considered doing a standalone again since it's something I'm familiar with and gives me control over things I don't have with the Bosch ecu/Cosworth pdm but I also feel like it makes sense to do the couple things I need to do to get the car running/driving with the OEM stuff. All good times. I've said this before that I just need to do this one bite at a time but as of late, even that feels like a lot.
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There has to be a way to get a wiring diagram for that, but you also know a guy who has a weird fetish for building wiring harnesses...
Excited to see where this goes!
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Simon -1966 Lotus Elan FHC 'the project' -1986 German Car TBD ' the ...?...' -2006 Jetta TDI 'the daily' |
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Someone has to have the wiring diagrams. Maybe ask in the Cup Car forum over on Rennlist.
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As much as I have enjoyed watching your build over time, and as much as I hope you decide to continue working on it( maybe back to aircooled type car, 993 VRAM perhaps). The reality is that in 15 years you will not miss the car that much, but you will regret not spending as much time as possible with your daughter. That is just the fact of fatherhood.
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This build is incredible...I'm still working on getting caught up, but I've peeked at the later pages and...holy moly. Epic work!!
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Join Date: Oct 2000
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Gabe, what's the hurry? Here's my story.
I bought this 1982 SC in? I can't remember between 1998-2000 and its not important. I drove it to work for a year and it was lightly hit at 2 am in front of my house. My daughter was 12 or 13, man is it tough to be a dad to a daughter, just trying to figure out how to do things with a teenage girl, have a conversation, be kind, loving, fatherly, and teach, is a TOUGH job for a father with a daughter and it still is. She showed some interest in the car, so we took the insurance money plus a pile of cash and we decided to hot rod it. She helped me design a widebody Targa. Yes she dug the speed yellow so speed yellow it was. We were driving it with the stock 3.0 and she called it a pooch, and said dad we need a bigger motor. So a 3.6 from Germany was on the way. She helped when she could (sports, school) but I got to have some great conversations with her just to figure out where she was. She said Dad it would be cool as a convertible. So we found a kit that was a Targa/convertible mix with a speedster clam. If you want to hear the story about her freaking out when we cut the roof off let me know. The big day came and she was off to college and never really returned to the Notre Dame Indiana area. You want to talk about heart broken. After that I went to grad school, raced my Outlaw super late. Started a business. The car sat till maybe 2014-2015 when I drove it 20 miles. Still only has about 1000 miles on it with a fresh motor from when I installed it to this day. Couple years ago I put Zuchs on it, bunch of parts sitting on the roof. And still sits. She has a key, its half her car, we have conversations about it, I now have a couple granddaughters. And its time to get to this car. The goal is a car build (of course a Porsche) with my 3 year grand daughter, Portland Or, is a long distance but we will do it. I never finished it, even the motor was never taken out to tidy it up from the initial build test fit I am getting ready to pull the motor, detail it, a few new parts, new suspension parts, a hard top, big brakes, paint freshen up, interior carpet etc. ( I will be doing a thread or add to the old one). It may take me a couple more years, but its ok, when I go out to the garage and look at it, its a painting or artwork, all those memories come back as I sit and stare at it. Moral of the story, its ok for it to sit. In a few years your daughter will love the car and you will cherish the memories like I have. One day she will have a key and maybe you will get it done faster then I have. In 15 years the parts will be astronomic in cost. Your daughter would not want you to give up your dream, its ok, you'll get to it. This is absolutely a true story, Sorry to hijack your thread. Kevin
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DIY wrencher
Join Date: Apr 2015
Location: Vienna
Posts: 228
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Hi Gabe,
If you need some inspiration for the eventual amazing outcome of shoehorning a watercooled engine into an air cooled chassis, I just came across a really insane build, a 964 with a GT3 engine and a bunch of other amazing upgrades, they call it the 964 RS GT. I would think that you already know about it but didn't see you mention REEN Automotive so not sure? There are some cool videos on Youtube and a detailed interview with the founder Philip Hoffmann on the Car Chat podcast. While the 964 chassis is somewhat different, the rear mounting area should be the same, so maybe their engine crossbar works? You could also try and find out what they are using for front radiators, if you haven't gotten the CSF ones yet. Cheers, Lukas https://reencars.com/rsgt/
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88 911 Carrera 3.2 G50 - driver 77 911S - rust bucket backdate project IG: @lukas.matzinger |
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There's a great Henry Catchpole video too:
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Heavy Metal! Part Deux - The Carbon Copy Project Heavy Metal https://tinyurl.com/57zwayzw (SOLD) 85 Coupe - The Rot Rod! AX beater Quality Carbon Fiber Parts for Classic 911s: instagram.com/jonny_rotten_911 |
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Join Date: Mar 2011
Location: Minneapolis
Posts: 404
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In a way, there is never a rush. In another way, if I'm not using something I have a propensity to want to get rid of it. My use of the car has changed a lot since moving from Los Angeles to Minneapolis and even more so having kids. It will become a fair weather, drive to the gym, auto events, and hopefully a rally once in a while situation and I'm trying to decide if I'm ok with that. It's funny but I also reread through my thread once in a while and marvel at all the obstacles I've overcome to build this into my version of the "perfect" budget 911. It's no doubt a pretty epic build and I think if I can get the engine fired up, which I think I'm close to, that will go a long way into deciding on next steps. Regardless, I'll always have some sort of project to tinker on and I hope my kids will take an interest but you can never force it. Quote:
I've watched both those videos and it's exciting to see that some shops have figured out what I'd also like to accomplish. The engine/trans are mounted into the car but yes, fueling, wiring/management, and cooling are question marks. Routing the cooling lines and fitting radiators has been done but actually getting enough cooling to make it work long term is still a question mark. Interestingly, the reen homepage makes it look like they've now moved away from the watercooled GT3 engine and back toward an aircooled? Albeit an aircooled with 4 valves/cylinder... The 964/993 chassis is an easier starting point than a G-Body. Both the 964/993 have a center tunnel underneath the car that's accessible from below which is similar to all modern-day watercooled chassis and where the water lines run. Both 964 and 993 also have more room in the front bumper for radiators. Those with a keen eye may have noticed I bumped up my WTB thread for a 964/993 chassis. Mark let me know he still has a 993 shell available and I've been heavily considering whether or not I want to go down that path. All that said, I have made some progress in the last few weeks. I ordered "all" the fittings for the fueling system.
This should be enough to get the car to fire up albeit not drivable until I also put some cooling together. Phew. We're getting there.
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