MSD Tech Support Forums

Go Back   MSD Tech Support Forums > MSD Ignition Forums > Applications

Applications Which ignition is right for your vehicle.

Thread Tools
Old 02-26-2006, 08:36 AM
Posts: n/a
Default 85551 vs. 8361

Okay, I understand the difference between the two. Vac. adv. vs. mech. adv.

I'm just really confused in which one to get for my application. Most people suggest 85551. It's a 69 Nova with a modified 350. Headers, Edelbrock 650 AVS, 202 heads, "bracket cam", 10:1, 6AL, BlasterSS, etc. It is a weekend cruiser only. Fuel milage is not of concern.

Help please!

Reply With Quote
Old 02-27-2006, 11:52 AM
Posts: n/a

The 85551 does not have vaccum advance, it will work good for a performance up grade . The 8361 is the same but with a vaccum advance which will add fuel economy to your perf. up grade. All-in-all if your looking for fuel economy 8361 if your looking for more perf. 85551, which is the most common sold dist.
Reply With Quote
Old 04-23-2012, 09:14 PM
Posts: n/a
Default 85551 vs 8361

So, is the 8361 the same as the 85551 if you lock out the vacuum advance?
Reply With Quote
Old 04-24-2012, 05:21 AM
Gaz64 Gaz64 is offline
Senior Member
Join Date: Jan 2010
Location: Brisbane, Australia
Posts: 615

Why not run an 8394:

Adjustable for mechanical AND vacuum advance.

Reply With Quote
Old 04-24-2012, 07:21 AM
msdtech1955's Avatar
msdtech1955 msdtech1955 is offline
Senior Member
Join Date: Jan 2008
Posts: 10,022

the 8361 has a vacuum advance ,where as the 85551 does not....but,
if you locked it it, then it would become just mechanical advance ...just like the 85551.

vacuum advance lock-out.jpg
Reply With Quote


Thread Tools

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

Forum Jump

All times are GMT -6. The time now is 03:13 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
2015 MSD Performance