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-   -   How to buy your 911 twice, one box at a time... (http://forums.pelicanparts.com/showthread.php?t=379221)

Craig 12-20-2007 11:58 AM

Subbed, Awesome thread, Troy!! http://forums.pelicanparts.com/support/smileys/wat6.gif

Seahawk 12-20-2007 03:01 PM

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!

Zeke 12-20-2007 03:16 PM

Quote:

Originally Posted by schnellmann (Post 3656642)
[I had a bit of free time tonight, so I wrote another installment. And it's actually Part IV. Here goes...]

Before I resume with the really important and exiting build-up episodes, I’d like to talk about tools for just a bit.

I’m not a mechanic, but I have a lot of tools. You pretty much have to in order to undertake this kind of project. My wife says there’s not one thing at Sears or HF I don’t already own. Not quite. I have 3 or 4 of some things they sell there. :)

Now I suppose I consider myself of an something of advanced tool user. I’ve been using them since I was a teenager. After a few successful projects, you understand where things are how things actually work. Though once you get the hang of using your tools like you’re supposed to, the relationship with your tools that was once so thrilling and fulfilling can start to become dull… even perfunctory.

Every now and then you need to spice things up a bit. So when the urge strikes me I like to try using tools in unorthodox and/or in ways their makers never intended. For example...

Lesson #1: You’ll always forget to buy a flywheel lock. Or if you managed to get one for a previous project, you’ll use it so infrequently that you’ll forget where you put it. If you’re anything like me – which means you’re irrational enough to sink hundreds of hours and 10s of thousands into a car like this – the thought of plunking down 20 clams for silly piece of toothed metal with a couple holes drilled in it is totally and completely wrong, immoral and possibly even unpatriotic.

Bottom Line: You totally don’t need it. Sure, you could do as Wayne suggests in the rebuild book and go to the hardware store, buy a piece of flat stock for 3 bucks, cut it down and drill holes in it. But the hardware store is like 5 minutes away. And that would also mean I’d have to dig the drill out of the drawer all the way across the room. Why not just walk up to your tool cabinet and see what you already have? So that’s what I did, here’s what I found and this is how I used it:

http://forums.pelicanparts.com/uploa...1198127229.jpg

1/2” on one end, 9/16” on the other. M6 allen head bolt in the flywheel. Works like a champ. ;)

Now as you can obviously see, I truly believe in using the right tool for the job, which is why I love my Dremel so much. No matter what the job is, with a bit of fiddling and a HF mondo rotary tool accessory box, it’s always the right tool.

Have Dremel, will travel.

Seriously… there is no mechanical conundrum this thing can't solve for you. If it’s too big, grind it down. If it’s too long, use a cutoff wheel. If it’s rough, polish it. If it’s too heavy, put some holes in it. ;)

But the real beauty of the Dremel is that it’s the tool you can use to make the right tool. As you’ll see in a later episode, I bought a set of 98mm JE pistons for my build and those that have JEs probably already know where I am going here.

Lesson #2: While pretty much everything about JE’s pistons is really nice, the circlips used to keep the wrist pins centered were obviously made by the devil. They are twice as thick as the stock ones and 100 times as springy. There seems to be two ways to approach getting those things into the pin bore. The first way requires 1 hour each, absolutely no children within earshot, a large box of band-aids and a six-pack (at least).

Bottom Line: There is another, much easier way. While it does require a trip to the hardware store, that pain is more than offset by the pleasure of using the Dremel to fabricate a new tool. Oh yeah...

And, like the flywheel lock, you could buy the Porsche tool. I have no idea what they sell it for, but as you’ll see in a moment, it’s too much.

What you need to do is find yourself a 7/8 ID bronze bushing. 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:

http://forums.pelicanparts.com/uploa...1198127312.jpg

Note: I wish I could take credit for this, but I saw it on another post a while back. What I never saw anyone post, though, was the technique I used for actually inserting the circlip into the bore. Before attempting, put on your safety glasses. The ends of the clips are sharp and when these things pop out, they really pop. I kid you not – on one of my first attempts the clip flew out and actually stuck in the ceiling.

OK, so the process is as follows - first, you’ll have to go to the trusty tool cabinet with your newly crafted masterpiece in hand and find yourself a socket with an OD that closely matches the ID of the bushing. While you’re at it, get a small hammer too. A plastic faced one works nicely.

Next, go back to the workbench, place the socket and hammer within reach and insert the clip with your thumb. The split end needs to be pointing upward. It takes some pressure - no need to be gentle:

http://forums.pelicanparts.com/uploa...1198127475.jpg


Now we arrive at the "finesse" part. Gently rotate the clip about 20 degrees from vertical, so the split is more or less centered in the notch of the bushing:

http://forums.pelicanparts.com/uploa...1198127531.jpg

This is the part where the clip is most likely to go supersonic, so approach the piston slowly with the bushing in hand. The cutout and the split end of the clip should be topside, as shown. Now carefully insert the clip in the pin bore, setting the clip ends into the ring recess. Grab that socket and hammer you just put down a minute ago and insert the socket into the bushing until it butts up against the clip.

http://forums.pelicanparts.com/uploa...1198127618.jpg

Give the end of the socket a nice, firm tap:

http://forums.pelicanparts.com/uploa...1198127644.jpg

Voilà!

Total time to insert each clip: 45 seconds. Number of profane words used: 0. Total cost: $1.26. Making your own tool that actually works? Priceless.

To be continued…

I dunno if that's in Wayne's engine rebuild book, but if not, it needs to be in the next edition! Great work!

schnellmann 12-20-2007 06:54 PM

It's not in the book... but seeing as how this is Pelican's board I think Wayne can claim eminent domain. :D

JackMan 12-21-2007 03:50 AM

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!

911 tweaks 12-21-2007 03:24 PM

for those who live a small world........who is Hunter S. Thompson?

schnellmann 12-23-2007 08:35 AM

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

schnellmann 01-02-2008 07:27 PM

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...

yelcab1 01-02-2008 07:50 PM

Oh it is so clean it is sick. You need to get some help for this.

schnellmann 01-02-2008 07:57 PM

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... ;)

ianc 01-02-2008 08:30 PM

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

livi 01-03-2008 12:40 AM

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!

911 tweaks 01-03-2008 05:17 AM

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

schnellmann 01-03-2008 07:09 PM

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.

shbop 01-03-2008 08:24 PM

Great job Troy!

trconway 01-04-2008 07:10 AM

subscribing to learn more great stuff. Large software company in Redmond?

Never heard of any out that way!!!!!!!

Nickatnyt 01-04-2008 09:11 AM

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.

schnellmann 01-04-2008 09:38 AM

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...

Mike Andrew 01-04-2008 10:32 AM

subbed

Nickatnyt 01-04-2008 12:45 PM

Quote:

Originally Posted by schnellmann (Post 3682629)
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...

Would that be PCA lapping days or any club (IRDC, BMW, etc) on the schedule there?


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