tfi upgrade done-a couple more ?'s - Off-Road Forums & Discussion Groups
Jeep-Full Sized All discussion of full sized Jeeps: Wagoneer, Full Size Truck

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 06-12-2001, 09:45 AM
**DONOTDELETE**
Guest
 
Posts: n/a
tfi upgrade done-a couple more ?\'s

Finished the upgrade last night and it seems much peppier, no pinging and starts much easier. I still haven't changed the plugs yet and I was wondering since I changed over from the prestolite ('75) to the duraspark if I should use the later plugs. The Chiltons plug number for '75 is N-12Y and for '77 and newer it's RN-12Y. I don't know what the difference is but my comon sense is leaning toward the later kind, and should I open the gap to .040 since I have the tfi coil? Also what's the best timing setting. It varies by year and ranges from 2 1/2 BTDC to 10 BTDC. I'm currently set a 5 BTDC.

Chris

Sponsored Links
Advertisement
 
post #2 of (permalink) Old 06-13-2001, 10:21 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: tfi upgrade done-a couple more ?\'s

i was at a buddies the other day who just happens to have a dyno in his shop!!! and we dyno'd my jeep with
bosh double platnuim's,and then ac del.rapid fire both at 40...the rapid fires came out ahead with 5 more hp...
kewl huh!!!

fullsize jeep fanatic
oh yeah> the bigger the better
post #3 of (permalink) Old 06-13-2001, 11:42 AM
brendan
Guest
 
Posts: n/a
Re: tfi upgrade done-a couple more ?\'s

I run my gap in my 258 w/ TFI at .045, but a lot of guys run them up to .060. I found that it would run better when cold if I closed the gap up from .050 to .045. I dont have the answer to your other two questions. My guess would be that the timing setting is related to emmisions requirements for certain years, just advance the timing until it starts to miss, then back it off until it stops. Brendan

Proud owner of the world's best running Carter BBD
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome