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> Engine build Take 2, The rebirth of my 2270
bd1308
post Jul 17 2005, 07:57 AM
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QUOTE (Jake Raby @ Jul 16 2005, 12:46 PM)
You should see the clearances inside the 3.0!

The rod to cam clearance is only .018 at max interferance

Works like a charm!

dumb question, but at what point is the T4 case completly maxed? Is 3.0 that limit because of the very small clearance, or is there other ways to get around that issue for even bigger displacements?
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Dave_Darling
post Jul 17 2005, 02:07 PM
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Clearance is the biggest problem. When you go over "about" 78mm stroke, it gets really really really tricky to avoid having the bottom of the connecting rods slamming into the cam lobes. There are ways to get more clearance, but they tend to be a wee bit expensive...

--DD
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DNHunt
post Jul 17 2005, 06:15 PM
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Well I got up Saturday morning with visions of getting the lower end done. I laid out the galley plugs. These are 3/8" National pipe thread plugs recess for an allen wrench. The tap is naturally 3/8" NPT and the drill is 37/64". I did it on the drill press. It leaves a lot of stuff to clean. I also did a couple of the 1/4" galley plugs near the oil cooler cause they looked bad to me.


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DNHunt
post Jul 17 2005, 06:17 PM
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One goes here on the left half rear under the fly wheel.


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DNHunt
post Jul 17 2005, 06:19 PM
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2 go here on the right half front near the fitting for the oil filter


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DNHunt
post Jul 17 2005, 06:21 PM
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And 2 go on the right half rear under the flywheel.


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DNHunt
post Jul 17 2005, 06:24 PM
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This is what I use to seal them. It is my friend and I'll use it a lot. Locktite 518.


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DNHunt
post Jul 17 2005, 06:26 PM
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Next I chased the holes for the head studs with a little oil and cleaned it with brake cleaner and compressed air.


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DNHunt
post Jul 17 2005, 06:31 PM
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About this time I'm feeling pretty smug. Got a lot done the day before and I was cruising. Installed the first head stud.


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DNHunt
post Jul 17 2005, 06:52 PM
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Ok, so I'm confident, cocky maybe, full of myself for sure. I'm going to show you guys I can build a type IV. Well you know what's going to happen, a dose of modesty. 2nd stud goes in 3/4 of the way and no further. It won't come out either. I tighten the double nut and add a vice grip to the inner nut. I know that the Locktite 518 is setting so I'm working pretty fast. I bung up the nut and now I can't get them separated and I know I have to get the stud out, so I try heat. Anyway things spiral downhill and I realize I'm not making any progress so I get out the pipe wrench (18") Anyway, the stud breaks and I've spent most of the last 2 days getting it out.

So, Jake, now you can say "A type IV's worst enemy is a guy with a 13 mm wrench or a pipe wrench". Leason learned. Slow down and don't get overconfident.

Despite my worst efforts yesterday I was pretty good today and rigged up a nice jig for the drill press and managed to very carefully drill the sucker out. I used some small dental instruments to fold the old stud in . The treads look pretty good. I've got a lot of cleaning to do.

Here's the broken stud and some nuts I tried to weld to it. Nothing gives you a dose of modesty like getting caught in your dirty underwear in public. (IMG:http://www.914world.com/bbs2/html/emoticons/stromberg.gif)

Dave


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Jake Raby
post Jul 17 2005, 07:27 PM
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HOLY SHIT!

Are you any kin to Goliath???

DAMN- I have never sheared one of those studs, and I have had some pretty nasty encounters with them...

They exceed Aerospace quality!

Charles or myself may have some extras.

Guys: The scoop on Dave's engine was weird, he had a camshaft on one of the "problem" billets from early last year and it was coupled to ceramic lifters. If it had not been, it would have wiped out in 20 minutes.

In fact, seeing dave's cam gave me the leverage I needed to convince the cam grinder that "Those" Billets had issues and they should not be used- a suspicion I had never been able to totally illustrate with conventional lifters.

Dave had quite a few things going on at once- most of it aggrevated by a super rich mixture that was washing the cylinder walls down during a crucial ppoint of break in and accelerating wear.

Charles and i took care of him and learned something at the same time, due to the fact that we had never seen these wear traits before.

Dave, Slow down- DO NOT RUSH!

grab yourself a 12mm X 1.5 tap and chase those threads, they must have crap in them.... I also preheat the case a tad before installing those studs, and generally do not use 518 on them, my teflon 574 is slow to set and works great for them.

I experienced some difficulty from one of the studs yesterday myself as I was assembling the Super 2 liter, so it happens to all of us.... but I didn't break mine off (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif)
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redshift
post Jul 17 2005, 07:37 PM
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(IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

Keep it up Dave, it's a great thread, thanks man!


M
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ablose58
post Jul 18 2005, 03:15 AM
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RIGHT ON DAVE (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif) Can't wait till you get her all back together and maybe I can catch a ride in that beast of yours (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) AL
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rhodyguy
post Jul 18 2005, 05:43 AM
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"Super 2 liter"? so what the hell is that?

k
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Jake Raby
post Jul 18 2005, 07:06 AM
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My attempt to attain 50 MPG from a 2017cc TIV....

Read more about it later when I do the full write up on my website...

Its a high velocity, long stroke, long rodded, small bored, EFI'd, Direct fired daily driver for Beth's 79 German look vert...
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rhodyguy
post Jul 18 2005, 07:18 AM
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long stroke huh? still torquey down low? hit that mpg mark with long engine life, and you'll sell them by the ton. price of fuel these days and all. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/hijacked.gif) sorry dave.

k
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DNHunt
post Jul 18 2005, 07:42 AM
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Jake

I figured that one out. I chased them with a tap this morning. I'm cetainly no goliath. I just had a lot of leverage. Interestingly, that was not too bad to drill and I got the thing dead center. I'll clean up the stuff tonight. Argh, back to cleaning parts.

I'll switch to the teflon stuff.

Dave
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rhodyguy
post Jul 18 2005, 07:51 AM
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are the 2 return tubes plugged on your heads dave?

k
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Jake Raby
post Jul 18 2005, 08:03 AM
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Kevin,
Thats exactly why we are doing this Super 2 Liter project- Gas prices have never been higher before..

The engine should make 130 lb/ft of torque from about 2,000 RPM on up from the computer models that we have so far..

It weighs in with a healthy dose of efficiency assistance (AKA CR) at 10.1:1 but should run fine on midgrade.

Its first long trip is scheduled fro November to the Florida Bug Jam- We want to make the whole trip on one tank of fuel.
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DNHunt
post Jul 18 2005, 08:07 AM
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Kevin My heads are off a 73 so no ports. I have a couple junk heads with ports if you want to play with them. Each head has 4 cracks. (IMG:http://www.914world.com/bbs2/html/emoticons/mad.gif)

Dave
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