Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> QUICK TOP END JOB, Then There's Murphy Law
Type 4 Unleashed
post Jun 7 2005, 01:44 AM
Post #1


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
If, anything can go wrong, it will, and it did. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

Originally, I was going to do a rering, well when I tore the motor down to the cylinders, I couldn't stop there, so I split the case. Everything looked really good, so I sent the crank out to be polished, mains checked out ok, the rods, 1 came out at .0015" under the other 3, if it had just been a .001" under the other's, I would of let it go, so I had the rod journals cut .010" under.

The Cam and lifters, looked really good, So I am going back up on the valve spring pressure, so that means that strait cut gears, have to be used with the heavier springs.

Pistons, I swaped out, I switched the BME's for a set of CP's. The CP's piston and pin, were 122g lighter apiece than the BME.

The cylinders, with a light honeing, a very light honeing, cleaned up great, the guy who did the honeing, was surprised at how little honeing it took to clean them up, especially, after I told him the miles, that were on them.
Also, I had the top of the cylinders cut for sealing wire.

The bottom end went back together, everything was perfect, except for the end play, but it was only a .001 more than what it was previously, and well with in specs.

Here's a pic


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 7 2005, 01:53 AM
Post #2


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
Another: Bore on these are 105.7mm (4.1615") .008" piston to cylinder wall clearance (IMG:http://www.914world.com/bbs2/html/emoticons/w00t.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 7 2005, 02:05 AM
Post #3


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
Copper Gasket, that had been torqued, shows where the sealing wire seals. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 7 2005, 02:11 AM
Post #4


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
Heads: (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 7 2005, 02:13 AM
Post #5


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
Head: (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 7 2005, 02:14 AM
Post #6


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
Springs: 1.250" small block chevy springs, Installed Heigth 1.800", about 370 pds at full valve lift (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SGB
post Jun 7 2005, 07:22 AM
Post #7


just visiting
****

Group: Members
Posts: 4,086
Joined: 8-March 03
From: Huntsville, AL
Member No.: 404
Region Association: South East States
and .....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
nebreitling
post Jun 7 2005, 08:26 AM
Post #8


Member Emeritus
****

Group: Members
Posts: 3,314
Joined: 26-March 03
From: San Francisco
Member No.: 478
what's the stroke on that motor? how many miles did you get on it before this refresh? power output? compression?

i'm curious...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
type47
post Jun 7 2005, 09:41 AM
Post #9


Viermeister
****

Group: Members
Posts: 4,254
Joined: 7-August 03
From: Vienna, VA
Member No.: 994
Region Association: MidAtlantic Region
what's the source of your copper head gaskets?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Jun 7 2005, 09:45 AM
Post #10


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
Richard-

when can i take delivery (IMG:http://www.914world.com/bbs2/html/emoticons/lol2.gif)
rock on man (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jun 7 2005, 09:52 AM
Post #11


914 Freak!
***************

Group: Members
Posts: 17,146
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
QUOTE (type47 @ Jun 7 2005, 08:41 AM)
what's the source of your copper head gaskets?

i've got a set of 2.0 .030" copper gaskets I'll let go cheap, told not to run them on my turbo motor..........
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 8 2005, 12:20 AM
Post #12


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
QUOTE (SGB @ Jun 7 2005, 05:22 AM)
and .....

"And", the assembly up to, installing the heads, was nothing unusual.
After installing the heads, I do a kinda cylinder pressure test, I turn on my compressor, and pressurize the cylinder with 150 psi, I look for unusal leakage, there is some leak down past the rings, which is normal, but I look for leakage between the cylinder and head, or leaking past the valves. Well I had some leakage past the valves on 1 cylinder, I said shit, I didn't lap the valves well enough, so I pulled the head back off, the lapping looked ok, to be safe I did them again, reinstalled the head and repressurized the cylinder, it was still leaking. Troble shoot time, it was the intake that was keaking, I could feel it leaking with my finger, but the location was unusual, it felt like it was coming from the seat. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) I pulled it back off and determined that it was leaking between the head and seat, unbelieveable. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif) Had the seat pulled, couldn't find an oversized replacement, so had to have the head welded, then machined for a standard size seat, then the new 1 installed, I lost an intire day, because of this crap, that was friday. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

Come sunday, it was all together, and in the car, and I fired it up, Letting it warm up so I can dial in the carbs, when I see a puddle of oil growing under the car, shut it off, laying on the ground looking at over 2 quarts of oil, in a medium size puddle turning into a large 1, when I see, a little shiney object in the oil, it was an aluminum plug, out of the case, right next to the oil filter. DO YOU KNOW MURPHY? COULD ASK HIM WHY HE WOULD COME UP WITH THAT MURHY'S LAW CRAP, If I hadn't known about Murphy's Law, none of this stuff would have ever happened. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

Pulled the motor monday, striped it down, this morning had both plugs welded, and by 5:00 pm today had it back together, in the car, and fired back up. Tomorrow, I'll dial in the carbs, and be on the road again. (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)

"AND THATS IT" (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
redshift
post Jun 8 2005, 12:34 AM
Post #13


Bless the Hell out of you!
**********

Group: Members
Posts: 10,926
Joined: 29-June 03
Member No.: 869
good grief! you kicked ass!

(IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)


M
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Type 4 Unleashed
post Jun 8 2005, 12:36 AM
Post #14


CREATIVE TYPE lV ENGINEERING
***

Group: Retired Members
Posts: 787
Joined: 20-June 04
From: Aliso Viejo, ca
Member No.: 2,231
Region Association: None
QUOTE (nebreitling @ Jun 7 2005, 06:26 AM)
what's the stroke on that motor? how many miles did you get on it before this refresh? power output? compression?

i'm curious...

Bore 105.7mm Stroke 75mm= 2632

Miles? about 20,000

Power output? Lots Lots more, than stock

Compression? Was 12.2 to1 Droped it to 10.1 to 1

I, don't know what Murphy says about Curisoty, so don't just be afraid, be very afraid (IMG:http://www.914world.com/bbs2/html/emoticons/smash.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 20th May 2024 - 09:49 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...