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Subbed, Awesome thread, Troy!! http://forums.pelicanparts.com/support/smileys/wat6.gif
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Troy,
While I drive a 964, I love to pop in here for threads like yours...and the cross country journeys. You write very well, which is a wonderful trait. Couple that with the fact that you are not doing this in an Uber garage means I am all over this thread. Good luck! |
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It's not in the book... but seeing as how this is Pelican's board I think Wayne can claim eminent domain. :D
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OMG, Troy is my hero. Is he the reincarnation of Hunter S. Thompson?
"Grab the Dremel like you mean it, slap a cutoff wheel on there, make revolutions for warp speed and trim out a section like so" Right on, subscribed! |
for those who live a small world........who is Hunter S. Thompson?
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Part V: Two Holes are Better Than One
I’ve made lots of progress the last couple of weeks, as I promised in the "tools" episode it’s time to catch you guys up. So let’s get right to it.
Who wants a peek at the twins? http://forums.pelicanparts.com/uploa...1198427616.jpg Yeah, I can’t stop looking at them either. And they keep trying to move my attention upward every time I talk to them, but I can’t help myself. :D The heads were machined for 14mm lower plugs, valves and seats reground, guides and seals replaced and the circumference chamfered as I am using 98mm jugs and slugs (more on that later). Lesson #1: Head augmentation and reduction is not as common or as easy as you might think. There are probably less than a half dozen “clinics” on the left coast that I would consider letting put my aluminum lovelies under the mill. My surgeon was Jeff Hines, and the famous Mr. John Walker pointed me to him. Apparently, he is the only guy in the Seattle area who has the equipment and knowledge to do this right (or at all). He’s a great guy, well-known in local Porsche circles (used to be deep in the 914 racing scene) and does this kind of work for local shops too. But this is a side business for him and he does work as time permits, so he asked me not to post his contact information. But if you type his name into use the search button above, you’ll find it anyway. ;-} Bottom Line: It really is just like Vladimir Lenin said: “Other plans are what happen while you’re making a life.” ;) When I initially called Jeff I left a message saying what I wanted. I got busy at work, heard nothing for a couple of weeks and started considering other options. I talked to Misters Weiner and Schmidt about taking on the work. Since Steve Weiner is only down in Portland, I was about to throw my hardware in the car and “self ship” them the 180 miles to his shop. But then one afternoon, out of the blue Jeff called me back and said he had some time and to give him a call. I gave him a description of my goals, and he knew exactly what I wanted. I arranged for a drop-off, and as we closed the conversation on a poignant, existential note. “It’s all about timing,” he said. So true… so true. For the remainder of the shop work both John Walker and Jeff Hines pointed me to “good ol’ Robbie” at Action Machine in north Seattle. When two well-respected people say the same thing the same way about one guy… well, you know you need look no further. Action Machine did a great job checking and cleaning the crank and cam cases and balancing, rounding and re-bushing the rods. Even though they hot-tanked the cases and cleaned and re-plugged the oil galleys, I still expended ~8 hours, 4 scotch-brite pads, 3 brass rifle-bore brushes, 177 q-tips, 14 cans of brake cleaner and 2,675,897,312 brain cells making the silver parts squeak and shine. Here is the result: http://forums.pelicanparts.com/uploa...1198427655.jpg http://forums.pelicanparts.com/uploa...1198427774.jpg http://forums.pelicanparts.com/uploa...1198427816.jpg And here we are, at the summit of Mt. Sludge, the grungy slog complete. Should be nothing but a smooth, clean stroll down its inviting, ivory flanks from here on out, no? Well, we’ll see. There’s only one way to find out, and that’s to confidently place one foot in front of the other. So here we go. First up, the rods go on the crank: http://forums.pelicanparts.com/uploa...1198427854.jpg I used Raceware rod bolts (which unlike the stockers are re-usable – and they should be at more than $300 a set… for bolts!) I used the multi-step torque and stretch measurement technique, which was actually quite straightforward. I triple-checked my work, and I am pretty darn sure I got the numbers right as I was able to achieve repeatable measurements over the course of two separate days. Hooray! And at this point I have to admit my first potential misstep. Flagrantly disregarding Wayne’s teachings, I elected to NOT use Locktite on the rod bolts. Really, I chose flirt with disaster for 3 reasons: first, the Raceware instructions emphatically say to use oil on the threads and nothing else; second, the stock bolts had no such material used on them and IIRC the 3.2 rod bolts can fail due to overstretch/overstress and subsequent breakage, not because the nuts come off; third, after searching the board there is considerable controversy over whether applying Locktite makes any difference. Wayne himself even admits that “it can’t hurt” but probably is not strictly necessary. Further research indicates that Locktite 274 has close to the same lubrication (before setting up, duh) as 30wt oil… and applying oil to the threads is what helps achieve accurate torque measurements, as much (if not most) of the torque required to secure a fastener is to overcome thread friction. Only time will tell if this decision results in a future “lesson learned” post. But I am a resolute optimist – I think this motor will peacefully succumb to old age rather than catastrophe. And if the latter should happen and a nut does come undone, the absence of Locktite will make the other 11 bolts that much easier to remove. ;) So now that the crank is all dressed up, let’s head over to get the party started: http://forums.pelicanparts.com/uploa...1198428132.jpg Tune in next time when we’ll see what we can make with these… http://forums.pelicanparts.com/uploa...1198427900.jpg |
Part VI - Look What I Made!
I have one of those peculiar constitutions that is motivated - no, actually it's pathologically intrigued - by things that are broken, marginally functional or otherwise situationally askew. I think Shirley Manson said it best in Garbage's song "I'm only happy when it rains."
Don't get me wrong, I do appreciate it when things go right. But they are pretty boring to write or talk about. I mean, every song, script and sonnet ever penned was talking about something wrong, someone wronging or being wronged, right? Except maybe the Seinfeld show, which was in fact about nothing. But I can't write about that. I'm not that clever. I do, however, have pictures. For those who are interested... I used Threebond 1104 around the case perimiter and Locktite 574 on the case webs. A bit of Curil T on the pulley seal in the #8 bearing. I really like the Threebond. I have every confidence that it'll seal well. But unlike the Locktite, which when cured comes off easily with gasket remover, I have no idea how I'd get that stuff off if I ever have to crack the case open again: http://forums.pelicanparts.com/uploa...1199328699.jpg Excuse me a moment while I put on my flame suit. OK, there. It's on. I am using a matched set of 98mm QSC cylinders with JE 10:1 pistons. I purchased them from Henry Schmidt. Before harassing me for buying Chinese parts for my German baby... think of me as your personal canary in the coal mine. Said another way, I'm putting my money where my mouth is so you don't have to. :) In truth, I could have afforded a set of Mahle 98mm Ps & Cs. But I opted for the QSC/JEs for 2 reasons: 1) $5500 for a wear item such as jugs and slugs is just plain obscene, in my ever-so-humble opinion. I couldn't do it, just on principle. :D 2) The JE/QSCs are less than half the price of the Mahles, while the chance of grenading the motor because of mechanical overrev (my most likely cause of engine death) is exactly the same. By not blowing all that cash now, it'll hurt a lot less if I have to build it again later because of this kind of failure. And so what if they only last 75,000 miles? At the rate I drive, that'll be at least a decade. Gas will be illegal by then, anyway. ;) However you slice it, they sho' is purdy: http://forums.pelicanparts.com/uploa...1199328718.jpg http://forums.pelicanparts.com/uploa...1199328733.jpg Deck height ended up at .97mm with a .25mm base gasket. A light coat of Curil T on both sides of the base gaskets and... perfecto: http://forums.pelicanparts.com/uploa...1199328762.jpg On go the heads. There is one interesting note here... this is actually the second valve job on my heads, which I didn't know before I started this. As a consequence, my valves were recessed a bit farther in the heads than "usual" and with the twin plug machining I ended up with more volume than I anticipated. All 6 heads ended up coming out at between 94.25 and 95 CCs. This lowered my compression a bit. I was shooting for 10:1 but instead I ended up with 9.5:1 - 9.6:1. In hindsight, it's not a bad thing... and the power delta is pretty small and probably worth the extra detonation "headroom" and peace of mind on hot days whilst stuck in Seattle traffic. http://forums.pelicanparts.com/uploa...1199328778.jpg I assembled the intake and FI on the bench. Much easier this way, methinks: http://forums.pelicanparts.com/uploa...1199328802.jpg Next up: check out my nice cams... |
Oh it is so clean it is sick. You need to get some help for this.
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Part VII - The Eagle Has Landed
So here we are - rounding third and heading for home plate.
This is not my finest Dremel work... but I did manage to get the metal out of the way on the timing chain cover for the lower #4 plug: http://forums.pelicanparts.com/uploa...1199331577.jpg Looking (only slightly) better than anything in a Victoria's Secret catalog: http://forums.pelicanparts.com/uploa...1199331594.jpg I am using John Dougherty's DC19 cam grind - very similar to 20/21 and a bit hotter than the 964 grind. He calls for 1.8 - 2.0mm at TDC overlap, and I ended up here on the left and the right: http://forums.pelicanparts.com/uploa...1199331615.jpg http://forums.pelicanparts.com/uploa...1199331639.jpg All buttoned up: http://forums.pelicanparts.com/uploa...1199331702.jpg Intake on, ready to hang under the car: http://forums.pelicanparts.com/uploa...1199331719.jpg Another peek at the lower plugs: http://forums.pelicanparts.com/uploa...1199331813.jpg Oh yeeeeeaaaaah, baby: http://forums.pelicanparts.com/uploa...1199331798.jpg Sure, it looks good. But will it run? Stay tuned... ;) |
I must say I'm very disappointed.
Now, this incomparable thread with it's coruscating narrative will be drawing to a close and a little bit of joy will be absent from my life because of it. Can't you go back and do something over again? ianc |
Great thread, Troy!
Being a tech ignorant (limiting my DIY to regular service projects) and a durn for'ner at that, I have no idea what you have been talking about but is sure was a great pleasure reading it! Thanks! |
wow! What is his real job?? I wouldnt want to compete with him on either fronts!! ;-)
I cant wait for the sound clip from u-tube when it fires up, right? You will promise to add a sound clip, right??? Best of luck here when you twist the key...damn...now I have more cleaning and polishing to do so my project won't look like a "pos" compare to yours. STOP THe SHINNEY stuff...you are killing me! Great job! Bob |
Thanks, guys.
There are at least 3 more installments to come: 1) The roar (hopefully) of the wild, beastly motor. :D 2) Pics of the "finished" car, including an enumeration of the build in case someone wants to use it as a template/guide/shopping list for the future. 3) The dyno sheet... I may even have a colophon posting of a couple additional lessons learned. And since someone asked... I work at an incredibly large software company located in Redmond, WA. |
Great job Troy!
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subscribing to learn more great stuff. Large software company in Redmond?
Never heard of any out that way!!!!!!! |
The Victorias Secret models look good but they can't sing near as well as your motor does.
I hope I can see it in person someday if the stars align to be in Seattle with my humble SC when you are showing off your work of art. |
I can be found at Pacific Raceways on lapping days fairly often. Probably even more than usual this coming season. :)
Stop by and say hello... |
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