 everyone knows, I NEED hElP THANK YOU ALL! |
|
|
|
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. |
|
|
| worn |
 Aug 16 2013, 09:22 AM
Post
#1
|
|
Winner of the Utah Twisted Joint Award  Group: Members Posts: 3,555 Joined: 3-June 11 From: Madison, WI and North Bend WA Member No.: 13,152 Region Association: Upper MidWest 
 |
You may remember me from posts like the squid that ate my transmission. I built an engine and have pretty much solved various problems like leaks and oil pressure and oil temp. It is a 2056 with a 73 web cam + 2.5°.
I had to do some work on the heads. I was shooting for about a little over 8:1 compression, and while I have some uncertainty of deck height I am certain of the head chamber volume all matched to 69 cc ( I would say milliliters). According to CB Performance that would give me a maximum of 8.4 compression. That is the set up here is the problem. On load I hear a ticking sound, with maybe a tinkling high tone. There are several alternative sources of rattling, but it is coming from the engine bay. The gas here is generally 91 octane. I have enriched the MPS to deliver A/F to around 11:1 at load with part throttle and that has not cured the problem. After break in the car turned more difficultly with the starter so I wonder if the cam may be producing better dynamic compression. The heads overheat if I push air down the road at 70 - they generally don't at 50. Timing is stock. Question 1. Is this knock/ping/pink(UK)? Question 2. What are my best options and how quickly must they be instituted. The car is grounded for now. 3 - Thanks! |
   |
 
|
  |
Replies
| stugray |
Aug 18 2013, 01:32 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Any chance you "upgraded" the oil pump during your rebuild?
If so...oil pump clearance to cam gear.....? Just a shot in the dark.. QUOTE On load I hear a ticking sound, Stu |
|
|
|
Posts in this topic
worn everyone knows Aug 16 2013, 09:22 AM
worn :idea: :popcorn: Aug 16 2013, 01:35 PM kg6dxn The pinging, overheating and hard start is indicit... Aug 16 2013, 01:36 PM
worn
The pinging, overheating and hard start is indici... Aug 16 2013, 04:35 PM r_towle What distributor?
What fuel source? What carbs? Wh... Aug 16 2013, 04:39 PM worn
What distributor?
What fuel source? What carbs? W... Aug 16 2013, 08:41 PM worn
What distributor?
What fuel source? What carbs? W... Aug 19 2013, 09:47 AM messix the engine most likely does not need as much ... Aug 16 2013, 08:19 PM john rogers I would say the problem is the D-Jet system. Unles... Aug 16 2013, 08:47 PM worn
Any chance you "upgraded" the oil pump ... Aug 19 2013, 09:40 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 5th March 2026 - 03:39 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.