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Unread 01-27-2010, 08:36 AM   #1
Chili4me
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1979 CJ7 
 
Join Date: Oct 2009
Location: Abilene, Texas
Posts: 65
360 Carbon Build Up

I bought a 360 out of a 90 Wagoneer. It ran very well and had 120,000 miles on it. I am goin to try to boost the 145 HP a little with an Edelbrock RV cam, performer intake, 650 cfm 4 barrel carb, and headers. I tore it down to a longblock last night and it was pretty clean except for the EGR ports and valley pan had about 1/2 to 3/4 of a cup of carbon build up. For the most part it is solid chunks stuck to the block that can be removed easily.

Question is-

Is this a large quantity that I should address by taking it in to a machine shop or should I just clean it up put the thing back together with my new cam, intake etc and drop it in my '79 CJ7 and go?

Thank in advance


Last edited by Chili4me; 01-27-2010 at 09:00 AM..
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Unread 01-27-2010, 08:44 AM   #2
BioTex
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2006 TJ Wrangler 
 
Join Date: May 2008
Location: Alpine, Tx.
Posts: 3,173
A good detergent oil such as Rottela will over time clean a lot of the deposits out. You will need frequent oil changes with "good" filters.
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 01-27-2010, 09:53 AM   #3
Sundowners
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1985 CJ7 
 
Join Date: Jul 2008
Location: Pittsburgh
Posts: 139
My opinion, I would take it to a machine shop and have the engine freshened up before I would start dumping money into a intake, carb, headers etc. You could do the RV cam during the rebuild. With 120,000 miles, it might be due for a rebuild.

Have you done a compression test or leak down test?

You could always add the intake, carb, headers later. This way you know that your are adding to a good base.

Heres my 360.

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Unread 01-27-2010, 11:50 AM   #4
Chili4me
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Location: Abilene, Texas
Posts: 65
That is way worse than mine. I'll post a pic tonight.
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Unread 01-27-2010, 12:11 PM   #5
BioTex
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You didn't mention your budget.
Of course a freshly machined engine is the way to go, but i was led to believe you were asking if you could get by with it like it is. Absolutely! Check into the Team Rush upgrade first, to get some extra ponnies. Sure brought mine to life. I'm happy with the RV cam, but i personally feel headers and an intake is a waste of money for Jeep engines used for low RPM's. I would go with the cam (for torgue), new lifters and a good Holley carb. I look at HP per dollar spent.

IMO the intake and headers is overkill for an engine with 120k. If you rebuild with higher compression pistons, and port the heads then yes. You would benefit from the headers, but still IMO not worth the expense. They do look good!
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 01-27-2010, 12:54 PM   #6
Sundowners
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Posts: 139
Quote:
Originally Posted by Chili4me View Post
That is way worse than mine. I'll post a pic tonight.
Yeah, another $75 special. I have to repair a chip by the back seal then its off to the machineshop for dipping and inspection.

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Unread 01-27-2010, 12:55 PM   #7
Chili4me
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1979 CJ7 
 
Join Date: Oct 2009
Location: Abilene, Texas
Posts: 65
I would like to spend 800 to 1200 on the motor, but would reluctantly go as high as 2000 if needed. I am fortunate to have close family ties to an auto parts wholsale company and can buy some parts very cheap (FelPro, Sealed Power, Cardone, Gates etc. No or small discounts on hotrod stuff like Edelbrock or Holley)
The reason I was going with headers and intake was to totally eliminate the EGR and AIR pump system. The exhaust manifolds have tubes on them, and headers seemed like they would be a better way to go. (maybe not).
I'm with you on the most bang for my $$.

Overall I guess I am trying to simplify things under the hood as much as possible. Neat clean and reliable

I live in Abilene, but I love that country around Alpine. I make it through there as often as possible. My username should give you a big clue to my destination
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Unread 01-27-2010, 01:15 PM   #8
BioTex
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Location: Alpine, Tx.
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Quote:
Originally Posted by Chili4me View Post
I live in Abilene, but I love that country around Alpine. I make it through there as often as possible. My username should give you a big clue to my destination
I was wondering about that! Most people wouldn't believe what goes on there. You should have been there in the 70's before the sheriff patrolled.
I hate it that they shut down the jeep trails, but so many kids were getting killed, I understand it.

Anyways, that is an off topic discussion for sure....

The EGR does not cost you any HP. to mention. It does help cool the valves, and cuts down on emmissions. I left mine on. The pulse air tubes in your exhaust can be plugged. Since you nuttered, you can get rid of the wiring harness that goes to the computer. I yanked the puter, and the whole harness. It is in a box saved for the next owner. You won't want it around when you put the 360 in anyways. Just adds to the confusion.
I think you will be amazed at the power differences when you get the 360 in.
__________________
'85 CJ7, BDS 4" lift, 1" Body lift, 33x12.5, Shrockworks Sliders, 304 V8 with RV cam., T-176, D300, Dana 30, AMC 20.
1986 CJ10-A SD-33 Diesel/727/np208
1971 800B with 345/T-19
06' TJ Rubicon, 4" R.C. springs, BFG/AT 35s M.C. 6" fenders, rockers and surrounds, Currie front & rear adj. tracbars, tattons DC rear shaft, adj. upper - lower CA's. Bilstein 5100's
YJ Buggy Build Current project. Stroker/FI ?
1990 MJ Comanche 4.0L AX15/np231
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Unread 01-27-2010, 01:53 PM   #9
Chili4me
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1979 CJ7 
 
Join Date: Oct 2009
Location: Abilene, Texas
Posts: 65
This is actually my first Jeep. The PO pulled the 304 and drivetrain tore down the 304 and had no idea what he was doing so then he just let it sit in a carport for 5 years. It is a mess to say the least. I have never even driven a V8Jeep before, but the 258 does so well I'm sure the V8 will border on ridiculous.

OT-

I have seen some things down there that would blow most minds. It is one of the last truely insane places to visit. When I first went HiPo was there a little, but now it is a total witch hunt. Didn't make it last year but I heard Ronnie was cracking down and using some unusual practices for law enforcement. I hope they don't screw it up.
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