 coil resistor, Jacobs coil |
|
|
|
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. |
|
|
| MarkG |
 Dec 27 2004, 10:13 AM
Post
#1
|
|
Member  Group: Members Posts: 314 Joined: 24-May 04 From: Colorado Springs Member No.: 2,102  |
Turns out my Jacobs coil does NOT have an internal resistor which explains my point melt down probelm....
Anyone have any idea what resistance ballast I need or how to calculate resistance needed? Or should i just get a Bosch Blue..........? |
   |
 
|
  |
Replies(1 - 9)
| Brando |
Dec 27 2004, 10:37 AM
Post
#2
|
|
BUY MY SPARE KIDNEY!!! Group: Members Posts: 3,935 Joined: 29-August 04 From: Santa Ana, CA Member No.: 2,648 Region Association: Southern California |
It'd be easier to just get a bosch blue, imho.
|
|
|
|
| MarkG |
Dec 27 2004, 10:41 AM
Post
#3
|
|
Member Group: Members Posts: 314 Joined: 24-May 04 From: Colorado Springs Member No.: 2,102 |
Me thinks you are right. It will be my lunch hour journey.
|
|
|
|
| BMartin914 |
Dec 27 2004, 11:18 AM
Post
#4
|
|
||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
IMHO...I would go with the Bosch Blue and a Pertronix Ignitor and eliminate those points altogether.
I wish you luck in getting your car roadworthy Mark! |
|
|
|
| carepro914 |
Dec 27 2004, 04:13 PM
Post
#5
|
|
Newbie Group: Members Posts: 1 Joined: 16-December 04 From: Ravensdale, WA Member No.: 3,299 |
I have a MSD Coil and Electronic pick-up in my 73 2.0 litre 914. I had to put a ceramic resister in line to cut the power to the points. You was able to find 1 of those at the local auto parts store.... not from 1 of the young guys working the counter, but an older guy that knows them from the use on small block Chevy V8's. My pickup had a max amount of power it took. A resistor will stip down 100% of volts to a 50% etc.... so that's what you got to look for.
The Bosch Blue Coil was always hot and my car didn't fire off real easy. After putting in the MSD coil, I had not problems. |
|
|
|
| Aaron Cox |
Dec 27 2004, 04:22 PM
Post
#6
|
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
coils should have a 3ohm impedence correct?
|
|
|
|
| Mueller |
Dec 27 2004, 04:39 PM
Post
#7
|
||
|
914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
|
each manufacture is different...my Accel coil is 1.5ohms, not too sure what the Bosch coils spec out at??? |
||
|
|
|
||
| Aaron Cox |
Dec 27 2004, 04:41 PM
Post
#8
|
||||
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
apparently there are 6 types of blue coils (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) and to run a unilite you need a 1.5 ohm or better (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) This post has been edited by Aaron Cox: Dec 27 2004, 04:45 PM |
||||
|
|
|
||||
| MarkG |
Dec 27 2004, 06:26 PM
Post
#9
|
|
Member Group: Members Posts: 314 Joined: 24-May 04 From: Colorado Springs Member No.: 2,102 |
Got the Pertronix today, but don't want to burn it up. Think I will just get a Blue coil to play it safe......
|
|
|
|
| DJsRepS |
Dec 28 2004, 07:14 AM
Post
#10
|
|
Member Group: Members Posts: 431 Joined: 4-November 04 From: Sarasota Florida Member No.: 3,060 |
I put an MSD coil on my point system. The enclosed directions said the coil was for the eletronic mod pkg but may be used on points with an .8 ohm resistor and gave me an MSD part #. Went to the performance shop I bought it from who said he would have to order that. I tried it without the resistor and did not make it to the end of my street. Had to put ole blue back in then file and reset the points Dwell Timing. I tried an 1.5 ohm dodge resistor later with the MSD ran like crap. I will eleminate the points soon as my mark jumps around while timing it. I cant feel any play in the dist shaft but it must be there?... Any way call the coil mfg for the proper ohm size as they are all different. Put the trusty blue back for now..... This resistor thing sounds bassakwards anyway, you buy an really hot coil then cut back the imput voltage that cuts the output?? Whats up with that anyway.....Also our 914s have 3 OEM resistors in the ign system. No external input voltage resistor (an input resistor is built in coil thats #1.) then under the cap in the rotor #2, then in the plug insulators each have one #3. And if the plugs #4 or wires #5 had a resistor it would run like crap. My local flaps (discount auto parts kept crossing my plugs into a resistor plug) OEM calls for non resistor plugs and solid core ign wires.
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th May 2024 - 04:14 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.