HEI installation questions from a newbie.

And i set it a 9 degrees, went for a run, and engine was better than ever before. However i do not know if it should peform better, i know noone here in denmark with such a jeep, so i will probable never know. The point is, i am satisfied now, thank you very much for your help guys, probably not for the last time

Best regards Mikkel

 

That is good to hear. Now that you know how it runs at 9 degrees, you may want to experiment with it a little. You can always set it back to 9 if your other setting is not good. If you do decide to try to experiment then advance it about 2 degrees each time you try. Good luck..

 

Glad you got it running good.

 

Hadn't been on this site in a while. Glad to see you got your HEI installed and your jeep running well . I installed an HEI on my 75 w/258 a few years back and it has been fantastic!! Of course, ANYTHING would have been an improvement over the Prestolite ! I'm sure you changed out your plugs, and I probably missed it reading over the replies, but your gap should be much greater than normal..approx .045.

Here's a pretty good link regarding the 258 and HEI upgrade.

http://www.crtperformance.com/html/258_hei_instr_.html

Pictures of your Jeep would be nice !

 

yea i changed plugs, and increased the gap.

I took the jeep for a LONG run this saturday, and i can conclude that timing is still not in the right spot. Accelerating makes it shake, until i stop accelerating and just drives at same speed. So i will try to advance 2 degrees, and test again and so on.

I actually read somewhere that is is your advanced timing that counts, and not the initial.

http://www.chevyhiperformance.com/howto/97438/index.html

 

And pictures, ofcourse.

Bought this spring in the nederlands, driven home with a transport company to denmark. Registered as a veteran vehicle, means cheap insurance and tax. I want to keep it as original as possible.

 

You have a very nice Jeep. Just for fun, take a look at your u-joints. Sometimes they can make a shaking feeling while accelerating.

 

eeeeh, u-joints. What is that? (bear with me, for not knowing english car expressions)

 

never mind, google images showed me what it is. what should i be lookíng for? And thanks for the nice word´s by the way!

 

Go under Jeep and shake your rear driveshaft, Look for any movement at each end. Play in the u-joint. Probably nothing wrong but worth a look.

 

NICE looking Jeep!!!!! Just read this thread and it looks like these guys gave you some great advice! I have also swapped in the HEI and like it alot. I didnt see anyone mention anything about making sure you use a matching set of gears on the distributor and cam. I dont know if there is much difference between the 6 and 8 cylinder as far as the gears go but....I have the 8 cylinder. I got maybe 150 miles on my jeep before the HEI stripped the teeth on the cam gear!!! May want to ask these guys about it. On the v8;s you can take the gear off the old distributor and put it on the HEI. I didn't know this so it cost me some time and money to do the repairs.

A little trick I use on the V8 to find TDC on "compression" is to put a cotton ball in #1 cylinder. Watch the harmonic balancer as it approaches 0*, if the cotton ball blows out, your on TDC compression. Really doesnt matter much though as you can always just put the balancer on 0* and crank it up. If it acts up then just rotate the distributor 180* and you've got a good starting point!!!!

 

Make sure the gear on the distributor shaft matches the gear on the cam. I made this mistake and ruined the cam gear. Steel on bronze don't play well togather.........