 boring out a cylinder, properly? |
|
|
|
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. |
|
|
  |
| orange914 |
 Jan 18 2008, 09:01 PM
Post
#1
|
|
http://5starmediaworks.com/index.html  Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California  |
i have a question on boring cylinders. (IMG:style_emoticons/default/yellowsleep[1].gif) i will be boring out a set of 94mm to 96mm. i've been made aware that a torque plate should be used. i'm sure it's the optimum, but is it truly a worry for a street engine if it's not avalible locally? one machinist said "on a sbc 400 you actually can see distortion when the head bolt is installed"... the air cooled cylinder, doesnt have a bolt tugging on the side of the wall, just studs alongside pulling a head down, so i wonder just how bad distortion could be? the shops i called have a device the cylinder slips into then is clamped down. i've never seen this "clamp".
any machinist out there? mike |
   |
 
|
| Jake Raby |
Jan 18 2008, 09:23 PM
Post
#2
|
|
Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
THE TORQUE PLATE IS A MUST!!!!!! I don't care if the engine will only idle!
If the cylinder is not bored under load it WILL distort when the clamping force of the head is applied.. It can change by a drastic amount and your rings won't like it. Procedures must be done correctly for ANY engine build. Now- if you are going to a V8 machinist go ahead and write off the engine. Those guys need to stick with their V8 crap... The aircooled engine is intolerant to many things that are perfectly fine for a cast iron blocked V8. |
|
|
|
| orange914 |
Jan 18 2008, 09:50 PM
Post
#3
|
|
http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(Jake Raby @ Jan 18 2008, 07:23 PM)  THE TORQUE PLATE IS A MUST!!!!!! I don't care if the engine will only idle! The aircooled engine is intolerant to many things that are perfectly fine for a cast iron blocked V8. thanks, thats what i needed to know... does anyone out there know of a good shop within driving distance of modesto, ca. (bay area, stocton, fresno). i finally got a set of undemolished cylinders through the postal service destruction team and really dont want to take that chance again.  |
|
|
|
| Jake Raby |
Jan 18 2008, 09:56 PM
Post
#4
|
|
Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
The shipping nightmare of shipping cylinders is why we quit doing the work..
I don't know of anyone in your area... |
|
|
|
| orange914 |
Jan 18 2008, 11:01 PM
Post
#5
|
|
http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(Jake Raby @ Jan 18 2008, 07:56 PM) The shipping nightmare of shipping cylinders is why we quit doing the work.. I don't know of anyone in your area... i'll search the s.f. bay area, theres got to be one out there . anyone? |
|
|
|
| DanT |
Jan 18 2008, 11:07 PM
Post
#6
|
|
Going back to the Dark Side! Group: Members Posts: 4,300 Joined: 4-October 04 From: Auburn, CA Member No.: 2,880 Region Association: None |
Jay's Precision Machine in Santa Clara Ca. Near the SJ airport. (IMG:style_emoticons/default/biggrin.gif)
he did all of my machine work....he has been machining parts for type ones and type4s for many many years. 1751 Grant St Santa Clara, CA 95050 (408) 980-0743 Attached image(s) 
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 04:55 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.