Page Index Toggle Pages: 1 [2]  Print
Hot Topic (More than 10 Replies) Aluminum head (Read 3053 times)
 
Brian M
Project Jeep
*
Offline


Still Plays With Jeeps

Posts: 22
Location: Springfield, Or
Joined: 11/01/16
Gender: Male
Re: Aluminum head
Reply #15 - 05/27/18 at 02:01:27
Print Post  
Well I finally got the Weber tuned I think. I started out trying to use the feel method and that didnít work out that well so I bought an AEM wideband O2 sensor and then I could see what was really going on. I was having a lot of trouble with a hesitation off idle without having to rich of a main jet and ended up changing the F50 emulsion tube to an F6 and that cured it, I want to try an F3 because my gauge still goes a little lean right off idle sometimes but they arenít available right now.

My original jetting on the primary started out at:
50 idle jet
155 main
160 air correction
F50 emulsion

Iím currently running:
47 idle jet
160 main jet
190 air jet
F6 emulsion
The secondary is:
50 idle jet
165 main
195 air jet
F50 emulsion

When I started out the gauge always read rich (10s and 12s) and I was getting 13.5 mpg, my last tank I got 17.5 mpg and I might get a little more because I went up a size on the air jet close to the end of the last tank of fuel. The air jet actually seems to make quite a difference on mileage. Now the Jeep idles at 12.5-12.7AFR, and when Iím cruising down the freeway it says 14-15 depending on load, unless Iím come to a hill or anything that requires more throttle then it goes back to 12.5.

Iíve driven the Jeep about 1000 miles since I had the valve problem and now the only trouble I have is it trying to get a little warm on the freeway when it gets close to 80 degrees, so I have a new 4 core radiator on its way.

« Last Edit: 08/25/18 at 14:12:49 by Brian M »  
Back to top
 
IP Logged
 
aboyandhisdog
Flatfender Master
Owner Member 2012
2016 Sponsor Member
2015 Sponsor Member
*****
Offline



Posts: 681
Location: Fort Collins, Colorado
Joined: 12/14/10
Re: Aluminum head
Reply #16 - 05/28/18 at 16:32:14
Print Post  
I would get a bit hot in the warm temps too.  Not terrible but approx.  110 degrees plus the ambient temp.  So if it was 90 degrees out, I might hit 200 on a slight up slope.  Hotter than I would like when I know there are guys that never get above 180.  Anyway, tried different things - thermostat, water wetter, pump is good, radiator is good.  We still have hot weather to come, but I think I have solved the issue by putting a different fan blade on.  I had a worn out flexi-fan, and put on a new Derale Flex fan and I am running cooler.  Haven't tried the OE fan, but I think I'm where I need to be now.
  

Tom

Back to top
 
IP Logged
 
mtnman37879
Flatfender Enthusiast
***
Offline


Plays With Jeeps

Posts: 137
Location: East Tennessee
Joined: 03/20/17
Gender: Male
Re: Aluminum head
Reply #17 - 05/28/18 at 22:21:55
Print Post  
The more compression you make, the more heat you make. Try some water wetter. It's a coolant. I ran it in a High performance 300 six cylinder I used to race. It lowered the temperature 25 degrees.
https://www.jegs.com/i/Red-Line-Oil/816/80204/10002/-1
« Last Edit: 05/28/18 at 22:25:20 by mtnman37879 »  

People think I go out of my way to piss them off.
Trust me, It's not out of my way at all.
Back to top
IP Logged
 
Brian M
Project Jeep
*
Offline


Still Plays With Jeeps

Posts: 22
Location: Springfield, Or
Joined: 11/01/16
Gender: Male
Re: Aluminum head
Reply #18 - 08/25/18 at 14:20:19
Print Post  
I finally got a new radiator in, what a mess though, do not buy one from prime cooling on eBay. The first one came damaged because their packaging isnít that great, so they sent me another. Again it came in damaged, this time worse. I contacted them and they wanted to refund me all but $30 and I keep the radiators. I told them I didnít want to pay for broken radiators I canít use and just wanted a good one. They said they told ups to be careful with it and wouldnít send another one, they did refund all my money though. I wasnít going to let them go to waste so I got the side off and fixed the damaged tube, then had to build new brackets because the ones it has are nowhere near right. Itís all in now and seemed to work fine now.
  
Back to top
 
IP Logged
 
aboyandhisdog
Flatfender Master
Owner Member 2012
2016 Sponsor Member
2015 Sponsor Member
*****
Offline



Posts: 681
Location: Fort Collins, Colorado
Joined: 12/14/10
Re: Aluminum head
Reply #19 - 08/25/18 at 14:28:22
Print Post  
Are you running cooler?  Did the rad solve your issue?
  

Tom

Back to top
 
IP Logged
 
Brian M
Project Jeep
*
Offline


Still Plays With Jeeps

Posts: 22
Location: Springfield, Or
Joined: 11/01/16
Gender: Male
Re: Aluminum head
Reply #20 - 08/25/18 at 19:10:49
Print Post  
Yep, I ran it on an 87 degree day and it had no trouble, even ran through town some and it had no trouble staying at 180 with the fan off.
  
Back to top
 
IP Logged
 
Brian M
Project Jeep
*
Offline


Still Plays With Jeeps

Posts: 22
Location: Springfield, Or
Joined: 11/01/16
Gender: Male
Re: Aluminum head
Reply #21 - 09/02/18 at 20:03:13
Print Post  
And they say old Jeeps can only go 45.
  

Back to top
 
IP Logged
 
Mark W.
Project Jeep
*
Offline


Chug A Lug

Posts: 45
Location: Silverton OR
Joined: 12/23/14
Gender: Male
Re: Aluminum head
Reply #22 - 10/27/18 at 23:00:57
Print Post  
Brian I am also going to be running a Weber DGV progressive two barrel. I am curious about one thing though. Why did you chose to run your carb 90 degrees to the way it should be run? I know it makes for a harder adapter or in your case DIY manifold. But you now have effectively one runner much longer then the other which will cause an imbalance.

I went a very different route I have modified a factory made Aluminum manifold to fit the 134L And have the Barrels oriented so that they are across the runners with a nice big Plenum.

I am also going to be creating a Tri Y style header where 1 and 4 are joined then 2 and 3 are joined and via a secondary pipes the two sets are joined exiting the jeep via a 2.25" pipe. This will increase the bottom to mid range Torque as compared to a Clifford 4 into 1 style header which really only helps on the top end. Like 3500 rpm and up.



I still have the mounting flanges to shape and some final polishing. The Phenolic spacer as well as the aluminum with the barrel sized holes also helps increase bottom end torque. And the Phenolic helps keep the carb cool. I also opted to put the PCV and the vacuum port for my gauge in the center to make sure that both sides were even.

I am running a Stock head that has been shaved .035" with the Deck cut .007" and a FelPro composite gasket that results in a 7.2-1 compression ratio with my .060" over bore.

Your jetting numbers will make a nice starting point for me. I'll be doing it old school based on plug color. Though I might go the O2 Wide band route.

« Last Edit: 10/27/18 at 23:01:54 by Mark W. »  

Chug A Lug

1948 CJ2A Tub and Title
1949 CJ3A Windshield
1957 CJ5† †Frame and Springs
134L T90 9.25" D18 D25 and D44 30 spline
11" Brakes, Saginaw Steering, 12V electrical
currently in a zillion pieces.
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1 [2] 
Print
Bookmarks: Facebook Google Google+ Linked in Twitter Yahoo