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Unread 05-12-2013, 07:19 AM   #136
2Xtreme
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Quote:
Originally Posted by lucdog
Just a FYI on off the shelf on octane boosters from auto parts stores.

I'll use the brand that says +4 on the can as a example. This stuff does not make 93 octane fuel out of 89 octane, it's only 4/10's. so by adding the proper amount the octane is only increased to 89.4.

Don't waste your hard earned $ on this stuff.

Bill
One bottle as a test was all unneeded to waste my money on.... Lol

I can get 110 (I think) octane, but it's like 8.00/ gal..... Nooooo thanks! Lol

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Unread 05-12-2013, 08:00 AM   #137
Matt1981CJ7
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My 258 and 360 both seemed to run better on the premium grade, as well. Around here, I think premium is 91 octane.

Bill, thanks for the warning on the octane boosters. I've often wondered if they do any good.

So, without doing the math, you'd have to dump a butt-load of that stuff in your tank to make a difference. Good to know.

Matt
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Unread 05-12-2013, 08:22 AM   #138
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Here's a interesting read.

http://www.exxon.com/USA-English/GFM...y_gas_faq.aspx
Be sure to read the part about how long gas lasts.
I use 87/89 in everything except my Harley Davidson, Honda 400EX ATV, and Stihl 2 stroke tools.

Bill
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Unread 05-12-2013, 08:48 AM   #139
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Regarding octane boosters... read the label before you buy. The stuff on our shelves states it can damage the engine over extended use.
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Unread 05-12-2013, 09:58 AM   #140
82JeepCJ7
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I run only non-ethanol fuel in my Jeep. That stuff is the devil!

www.pure-gas.org
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Unread 05-12-2013, 10:19 AM   #141
86cj74.2L
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Go buy a gallon of toluene for octane booster. That's what the gas company's use to boost their numbers.

One of the car magazines even posted a ratio.
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Unread 05-12-2013, 12:47 PM   #142
LumpyGrits
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Quote:
Originally Posted by 2Xtreme View Post
Yup!
I plan to post pics of all of the plugs
Keep'm in order so we can see if you have internal eng. issues.
LG
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Unread 05-12-2013, 12:50 PM   #143
LumpyGrits
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IF you really feel he need for high octane fuel.
Go buy some 110 oct. avation gas.
I the real world. Just buy the highest oct. pump gas you can......
LG
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Unread 05-12-2013, 06:39 PM   #144
2Xtreme
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Quote:
Originally Posted by LumpyGrits View Post
Don't forget a timing light....
I was going to borrow a light, but of the mindset that if you will need it more than once, you should own it.

So I have been doing a little looking around for one that will suit the majority of my needs - jeep and otherwise - AND include a tach function, and found the following.

http://www.summitracing.com/parts/equ-3568/overview/

Thought's/ opinions?
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Unread 05-12-2013, 06:53 PM   #145
86cj74.2L
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The standard craftsman dial back timing light cant be beat. Plus it works with MSD.

My tach is a cheep summit tach that I set on the battery and hook up with alligator clamps.
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Unread 05-13-2013, 04:42 AM   #146
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Quote:
Originally Posted by 86cj74.2L View Post
....My tach is a cheep summit tach that I set on the battery and hook up with alligator clamps.
That's a good idea.

Since I just dropped a bunch of cash on the other tools/ testers I'll need for this project.

2X
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Unread 05-14-2013, 04:54 AM   #147
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OK, back from a needed vacation and made some needed improvements on the Jeep thanks to you guys. I really needed to see some progress as I was getting pretty bummed out by the whole thing. So here's what I did, and where I am at:

1) Replaced the Cap/ Rotor/ Plugs (oem)/ Wires
Here are photos of the plugs I took out (in order, front is to the left):





I don't know if you can tell in those photos, but they all look like this:



Found this glop under my Cap. I'm assuming it is some sort of dielectric grease or silicone(?). It's a light blue color. Anyone know what it could be?



2) Then, I removed the ported vac advance on the dizzy and connected it to manifold vac - Tee'd into the port on the intake manifold, behind the carb.

3) Took it for a test drive and MAN, WHAT A DIFFERENCE!!

There may have been a slight pinging, but if there was I couldn't hear it over the exhaust. I drove it pretty hard - well, as hard as I dare with no brake lights.... AGAIN! lol.

Definitely more power and running closer to what I am used to from this thing.

Two things I didn't do:
Check for vac leaks (totally forgot because I was excited to try the vac change.....lol)

Swap out the T-stat for the 180* unit.
didn't do this yet because the silicone would have had to set up before I test drove it. And the engine was obviously hot after I drove it.

No work on it tonight. Dinner with the GF's parents.
Still waiting for my Summit delivery.

Thanks again and keep the info coming!!

2X
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Unread 05-14-2013, 05:19 AM   #148
86cj74.2L
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Those plugs are rich.
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Unread 05-14-2013, 05:52 AM   #149
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Quote:
Originally Posted by 86cj74.2L View Post
Those plugs are rich.
Yeah....
I'm confused because prior discussions have indicated pinging being due to a LEAN condition...
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Unread 05-14-2013, 06:00 AM   #150
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Make sure to clean all that silicone off. I wouldn't want it restricting the vacuum advance movement somehow.
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It's just a Jeep, and if you don't wheel it once in a while, it's not even that.
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