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General Diesel Tech Farm equipment, Medium Duty, Big Rigs, and other General discussion can be found in here. |
11-14-2015, 09:41 AM
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#1
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Name: Bobus
Title: Powerstroked
Status: Not Here
Join Date: Nov 2007
Location: Sturgis, So. Dak.
Member`s Gallery
Posts: 2,894
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Big Cam 400
What's your thoughts on a Big Cam 400 Cummins. It's in a '81 Freightliner backed by a 13 speed. Going to look at the truck this afternoon or tomorrow morning. Anything to watch out for? Do they make good power and can more be made safe and reliably?
__________________
Bob
'11 F350 6.7l 4x4 CC LB
'00 Excursion 12v Cummins 4x4
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11-14-2015, 10:13 AM
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#2
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Name: RDPsmoker
Title: OUT TO LUNCH..
Status: Not Here
Join Date: Nov 2010
Location: Casper or Laramie WY
Member`s Gallery
Posts: 1,815
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Maybe ask in this forum I see a lot of traffic through it.
http://www.competitiondiesel.com/for...d.php?t=108463
__________________
-DUSTIN-
THANKS TO MAXTORQ
95 2500
-DPC
-SUNCOAST
03 3500
-Stock for now
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11-14-2015, 11:48 AM
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#3
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Name: chevota84
Title: Too Much Time
Status: Not Here
Join Date: Jul 2009
Location: Prineville, OR
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Posts: 4,926
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Look for antifreeze around the heads and any fuel leaks on the injection pump, see if the owner knows how many miles are on the bearings too. Everything on them is comparatively cheap for a class 8 diesel but they can still eat thousands pretty easily.
Sent from my SM-G925V using Tapatalk
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99 Dodge 2500 with stuff
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11-14-2015, 05:07 PM
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#4
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Name: Bobus
Title: Powerstroked
Status: Not Here
Join Date: Nov 2007
Location: Sturgis, So. Dak.
Member`s Gallery
Posts: 2,894
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Went looked at it, truck is a little rough but it is 34 years old. Engine was almost completely dry except for oil on the front driver side where head/block meet. Engine sounds great idling, hazes a fair bit though. The tag on the engine says it's a '84 model year. That make it a BC III?
__________________
Bob
'11 F350 6.7l 4x4 CC LB
'00 Excursion 12v Cummins 4x4
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01-05-2016, 06:04 PM
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#5
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Name: Rkimball12
Title: Rookie
Status: Not Here
Join Date: Apr 2014
Location: Ortonville Mi
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Posts: 13
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Big cams were out. Good engines but not by much. They only noticeable difference between a 3 and a 4 is the injection pump. 4's do tend to run a little hotter so I would watch the egts. But I wouldn't worry about it if I was you.
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01-05-2016, 08:11 PM
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#6
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Big cams haze at idle that's no new thing. Most if not all (can't remember) 3's and all 4's had low flow cooking which is not a good thing.
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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01-06-2016, 02:03 AM
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#7
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Name: chevota84
Title: Too Much Time
Status: Not Here
Join Date: Jul 2009
Location: Prineville, OR
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Posts: 4,926
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Lol, low flow cooking. Bc4 was the low flow.
Sent from my SM-G925V using Tapatalk
__________________
99 Dodge 2500 with stuff
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01-06-2016, 05:11 AM
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#8
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Name: SmokinCAT
Title: Cheap and Easy.
Status: Not Here
Join Date: Sep 2008
Location: Hillsboro, Oh
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Posts: 3,162
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Like what is a fair amount of haze, like this?
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01-06-2016, 05:29 AM
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#9
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Quote:
Originally Posted by chevota84
Lol, low flow cooking. Bc4 was the low flow.
Sent from my SM-G925V using Tapatalk
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Damn phone got me! Lol
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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01-06-2016, 07:34 AM
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#10
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Name: jfaulkner
Title: Douche Hunter
Status: Not Here
Join Date: Sep 2007
Location: Ohio
Member`s Gallery
Posts: 5,864
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Quote:
Originally Posted by SmokinCAT
Like what is a fair amount of haze, like this?
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That's making my eyes water just looking at the pic. Lol
__________________
Quote:
Originally Posted by StainlessRRA
Flipping your mirrors up when you don't tow? That serves no purpose other than to let me know that you are a douche, from a distance.
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01-06-2016, 07:40 AM
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#11
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
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Posts: 18,859
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Man I can remember those days. Fire one of those up in the shop and get it outside asap. Those old engine will pump raw fuel out the pipes until they get up around 160 degrees.
That big cam 3 will not be low flow cooling.
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01-06-2016, 07:47 AM
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#12
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Name: SmokinCAT
Title: Cheap and Easy.
Status: Not Here
Join Date: Sep 2008
Location: Hillsboro, Oh
Member`s Gallery
Posts: 3,162
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This one was until I got the injectors set right, accessory drive was out of time so the set was completely off, it would have wet streaks on the block even after it was up to temp.
People can't leave well enough alone, that is the second engine I have dealt with that has been put together with the accessory drive out of time.
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01-06-2016, 07:58 AM
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#13
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
Member`s Gallery
Posts: 18,859
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Quote:
Originally Posted by SmokinCAT
People can't leave well enough alone, that is the second engine I have dealt with that has been put together with the accessory drive out of time.
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Yep, we've seen that a lot here too.
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01-06-2016, 08:38 AM
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#14
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
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Quote:
Originally Posted by Snedge
Man I can remember those days. Fire one of those up in the shop and get it outside asap. Those old engine will pump raw fuel out the pipes until they get up around 160 degrees.
That big cam 3 will not be low flow cooling.
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Yea I couldn't remember for sure on the 3. Re-reading my post I think it sounded like I was sure on the 3 and I wasn't. That was my bad.
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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01-17-2016, 07:42 PM
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#15
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Name: Bobus
Title: Powerstroked
Status: Not Here
Join Date: Nov 2007
Location: Sturgis, So. Dak.
Member`s Gallery
Posts: 2,894
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Quote:
Originally Posted by SmokinCAT
Like what is a fair amount of haze, like this?
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It will smoke like that on a 25* morning start, after 10-15 min of running it cleans up a lot and once warm it's gone.
__________________
Bob
'11 F350 6.7l 4x4 CC LB
'00 Excursion 12v Cummins 4x4
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03-03-2016, 09:12 AM
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#16
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Name: Destroked 450
Title: Too Much Time
Status: Not Here
Join Date: Mar 2015
Location: Harned,Ky.
Member`s Gallery
Posts: 340
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Big Cam 400's had lower compression and slower cam timing than other Big Cam engines to help control egt's. This made them harder to start and with a fair amount of haze when temps were low until the engine warmed up. They wont produce the power and torque of today's electronic controlled engines but will handle a big load quite well.
I've owned a few of these engines and consider them to be one of the easiest semi class diesel engines to work on and maintain. Still have the sig timing tool for setting cam timing along with extra deep 5/8 socket for jake brakes and a couple other tools that helped when working on these engines.
__________________
Mine: 04 F-450 sc 4x4 fb drw 5.9 12v 215 ppump, zf6, kdp fixed, 3k gsk, AFC Live, super b single, pusher intake, d-celerator ebrake
Hers:2018 F-150 sc 4x4 5.0
Farm trucks: 01 Z71 ext cab, 95 S10, 93 F-800 8.3 Cummins, 87 AM General 5 ton
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05-13-2016, 01:43 AM
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#17
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Name: Fordpower73
Title: Rookie
Status: Not Here
Join Date: Dec 2015
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Posts: 11
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If it's a Big Cam 3 the CPL should be either a 625 with a 3969 fuel cal (lots of torque and a fair amount of black smoke) or a 531, and a 614.. All are great CPL's. I just got through going through mine, it's collage of Big Cam 1/2 parts and a 3 oil pan, turbo and N14 exhuast manifold. The early Big Cam 2 blocks are thee best block to use for high h.p applications, here's why.. Take a head bolt out of a Big Cam 1/2, they're about 3/4" longer than later 2,3,4's. The main bolt diameter in the early 2's were the last of the mohican big bolt bottom ends.. After that everything went 3/4 inch main bolts and you guessed it cap walk. I had mine line bored by Mike Denning and we replaced 3 main caps and this engine had already been through the recon center. I put the updated wide cam bearings in it, timed it a .70 and let er rip.. DO NOT follow the timing charts in quickserve, that is epa crap, use what's in the ole manuals and it'll be fine. Use lots of fuel treatment and they'll run like a top. Any thing else just ask.
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05-13-2016, 09:20 AM
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#18
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Name: Destroked 450
Title: Too Much Time
Status: Not Here
Join Date: Mar 2015
Location: Harned,Ky.
Member`s Gallery
Posts: 340
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The last two I owned where cpl 625, good pullers.
__________________
Mine: 04 F-450 sc 4x4 fb drw 5.9 12v 215 ppump, zf6, kdp fixed, 3k gsk, AFC Live, super b single, pusher intake, d-celerator ebrake
Hers:2018 F-150 sc 4x4 5.0
Farm trucks: 01 Z71 ext cab, 95 S10, 93 F-800 8.3 Cummins, 87 AM General 5 ton
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05-13-2016, 09:27 AM
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#19
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Name: Snedge
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Sep 2006
Location: Western Pa.
Member`s Gallery
Posts: 18,859
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Quote:
Originally Posted by Fordpower73
timed it a .70 and let er rip.
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73-74 would have been much better.
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05-14-2016, 02:42 AM
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#20
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Name: Fordpower73
Title: Rookie
Status: Not Here
Join Date: Dec 2015
Member`s Gallery
Posts: 11
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Quote:
Originally Posted by Snedge
73-74 would have been much better.
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If you want it to start decent under 40 degrees leave it at .70, that was thee original nominal timing back in the early 80s.. Pittsburg Powa has had everyone on this whole lazy timing thing.. The first 400s CPL 267, 310, 324 and 393 were actually a 14.5/1 engine while the next CPL 449 was a 14.0/1. BUT the 454 CPL with MVT ran 14.5/1 pistons due to the retard. Almost all timing codes were right at .70, and plenty of people have made 500+ and got decent fuel mileage with .70 timing.. The 3969 fuel cal was the one to have, it had a much broader torque curve than any other calibration, you can time a 449 cpl engine to lazy timing and change the button, but the engine won't do what you want it to do until the springs are changed.. Yeah you can back your rail pressure screw out but still, your torque will not be felt, the difference is in the spring set up and how much fuel pressure it takes to move the plunger from the main circuit to the supply fuel circuit...
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