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12 valve cheap tricks for power upgrades

  
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12 valve cheap tricks for power upgrades

 
redhosser redhosser
New User | Posts: 2 | Joined: 03/10
Posted: 03/01/10
03:28 PM

I have a 96 3500 12valve AT, 4x4, i was wondering if anyone could give me some ideas to get alittle more power out of it.

Ive already slide the fuel plate back but i figured it would black smoke but it wont at all any ideas y it wont. Ive put a 4inch straight pipe exhaust.

Thanks for any ideas.  

White_Lightning White_Lightning
Guru | Posts: 942 | Joined: 07/09
Posted: 03/01/10
05:12 PM

First off, sliding the plate back reduces fueling potential. Forward for more fuel. Here's what I would do:
Make sure the Killer Dowel Pin is tabbed.
Get pyrometer, boost, trans temp gauges.
BHAF air filter (NAPA part # 2790, WIX 42790, and I think Amsoil makes one)
Get a aftermarket torque converter and valve body.
Take the fuel plate out.
Grind the foot of the AFC arm flat, and when you put the AFC back on make sure the housing is slid forward. Then tune the AFC to your liking.
Tighten up the governor springs 4 clicks so you can fuel to higher RPMs.
Bump the timing to 16 degrees advanced.
Drill the divider in the exhaust housing so the wastegate vents both sides evenly.
Get a boost elbow or build a boost controller so you can build 35psi of boost.
That's all relatively cheap, and should be good for around 300 RWHP and easily towed and daily driven with.  
Logan

2004 Dodge Ram 3500 QCLB with '97 12 valve swap, 5 speed, 4x4

SOLD: 1995 Dodge Ram 2500 SCLB, 12 valve Cummins, 5 speed, 4x4, lift pump, benched P7100, injectors, cam, port/polish, valve springs, studs, O-rings, coated pistons, balanced bottom end, intake and exhaust manifolds, S363/S480 compounds.

redhosser redhosser
New User | Posts: 2 | Joined: 03/10
Posted: 03/01/10
07:08 PM

will taking the fuel plate out hurt anything, and what do u mean grind the foot of the afc arm flat?  

diesels-built-by-cecil diesels-built-by-cecil
User | Posts: 104 | Joined: 07/09
Posted: 03/01/10
08:45 PM

Advancing the timing will not add much power and you can mess up the the pump. All you are doing is adjusting static timing not the acutual timing.  

Ojaz Ojaz
New User | Posts: 2 | Joined: 11/11
Posted: 11/27/11
03:08 AM

Yo buddy....

I like ur post... even though I am ignorant in terms of MOTORS.  I just bought a 97 12 valve xtra cab long bed truck.  I got 23 mpg on the way home at 70mph.  I love this truck.  

QUESTION...

If I do all the above Plus add a aeroturbine muffler...What kind of mpg will I get??  I baby my truck around.  I am an mpg fiend.  But I will be towing a small travel trailer at times.

Also... seems the aftermarket torque converter is the Most expensive part... Since I am easy on the truck can I bypass that till I absolutely need one??

Thanks as somehow Ur post seems to be very knowledgeable AND not motivated by someone trying to sell something.

Michael  

White_Lightning White_Lightning
Guru | Posts: 942 | Joined: 07/09
Posted: 11/29/11
10:16 AM

Red Hosser, no it won't hurt anything. I have been running without a fuel plate for about 50K miles now.

diesels-built-by-cecil, no, timing won't massively increase horsepower, but it does help a bit and it does improve fuel economy and keep EGT's down. I'm not sure how you are messing up the pump, because different engines run different degrees of timing from the factory. I ran 16* for a while, right now I'm at 18* and no issues. And by adjusting the static timing, you do affect the actual timing.

Ojaz- you sure about 23mpg at 70mph? That's a little high for what I would expect from a mildly modified pickup running 55mph. But a aftermarket muffler or better yet a mandrel bent 4" exhaust system with a flow through muffler will help your mpg's by about 10%. Yes you can bypass the T/C and replace it when you need it, I was suggesting it so he wouldn't have issues in the future.  
Logan

2004 Dodge Ram 3500 QCLB with '97 12 valve swap, 5 speed, 4x4

SOLD: 1995 Dodge Ram 2500 SCLB, 12 valve Cummins, 5 speed, 4x4, lift pump, benched P7100, injectors, cam, port/polish, valve springs, studs, O-rings, coated pistons, balanced bottom end, intake and exhaust manifolds, S363/S480 compounds.

theSLEEPER. theSLEEPER.
Guru | Posts: 1748 | Joined: 04/08
Posted: 11/30/11
07:33 AM

I just got a 5" exhaust for my buddy, we removed the fuel plate, and slid the AFC forward.

The gain is awesome. Next is a GSK.  
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Cummins123 Cummins123
New User | Posts: 1 | Joined: 04/12
Posted: 04/29/12
11:27 AM

FIRST OFF I LIKE THE CUMMINS 12 VALVES. I OWN A 1994 DODGE DIESEL AND I BOUGHT IT FROM PROVINCE RD. ABOUT 2 YEARS AGO. I FILLED THE TANK IN RD AND DROVE IT TO LONG ISLAND. I ONLY USED 4.5 GALLONS OF FUEL. THAT MEANS I WAS GETTING 32 MILES A GALLON BECASUE THE WHOLE TRIP WAS 150 MILES.  I COULDN'T BELIEVE IT.  GOOD LUCK WITH YOUR 1997 DODGE.

IF YOU KNOW ANYONE ON LONG ISLAND NY OR NEAR THAT IS SELLING A 1995-1997 DODGE RAM 2500 OR 3500 DIESEL EXTENDED CAB LONG BED WITH 5 SPEED MANUAL TRANSMISSION 2 WHEEL DRIVE SLT TRIM PLEASE LET ME KNOW AND EMAIL ME AT  THETRUCKER123@YAHOO.COM  

rico59 rico59
New User | Posts: 2 | Joined: 08/14
Posted: 08/17/14
01:56 PM

I could relate to that. I've got a bone stock 95 3500 series  4x4 dually. that I routinely get 20/21mpg at 75mph on cruise. turning about 2250rpm.  motor got about 80,000 miles on her. very rarely blows black smoke. the only thing I did was remove the exhaust filter and used a straight pipe in its place. it eliminated that "droneing" sound at about 45 to 50mph other then that the exhaust is stock size. she's a real sweetheart  

rico59 rico59
New User | Posts: 2 | Joined: 08/14
Posted: 08/17/14
01:57 PM

I could relate to that. I've got a bone stock 95 3500 series  4x4 dually. that I routinely get 20/21mpg at 75mph on cruise. turning about 2250rpm.  motor got about 80,000 miles on her. very rarely blows black smoke. the only thing I did was remove the exhaust filter and used a straight pipe in its place. it eliminated that "droneing" sound at about 45 to 50mph other then that the exhaust is stock size. she's a real sweetheart  

countryboyjesse001 countryboyjesse001
New User | Posts: 2 | Joined: 10/14
Posted: 10/20/14
09:06 AM

Hey i Have a 1981 chevy c20 truck i was wanting to put a 12 valve cummins in it. Now i know it can be done because ive seen it done i already have my truck set up for pulling and everything but i wanted a strong pulling engine to match up. ive seen people build there own engine mounts, is that a good idea to do? Are there any suggestions that you can give me, maybe to help me out in any way?  

countryboyjesse001 countryboyjesse001
New User | Posts: 2 | Joined: 10/14
Posted: 10/20/14
09:06 AM

Icon QuoteWhite_Lightning:
Red Hosser, no it won't hurt anything. I have been running without a fuel plate for about 50K miles now.

diesels-built-by-cecil, no, timing won't massively increase horsepower, but it does help a bit and it does improve fuel economy and keep EGT's down. I'm not sure how you are messing up the pump, because different engines run different degrees of timing from the factory. I ran 16* for a while, right now I'm at 18* and no issues. And by adjusting the static timing, you do affect the actual timing.

Ojaz- you sure about 23mpg at 70mph? That's a little high for what I would expect from a mildly modified pickup running 55mph. But a aftermarket muffler or better yet a mandrel bent 4" exhaust system with a flow through muffler will help your mpg's by about 10%. Yes you can bypass the T/C and replace it when you need it, I was suggesting it so he wouldn't have issues in the future.


Hey i Have a 1981 chevy c20 truck i was wanting to put a 12 valve cummins in it. Now i know it can be done because ive seen it done i already have my truck set up for pulling and everything but i wanted a strong pulling engine to match up. ive seen people build there own engine mounts, is that a good idea to do? Are there any suggestions that you can give me, maybe to help me out in any way?  

White_Lightning White_Lightning
Guru | Posts: 942 | Joined: 07/09
Posted: 11/03/14
04:02 PM

countryboyjesse001, you can build your own engine mounts or there are some companies that sell motor mounts specifically for that swap. I don't know how good your fabrication skills are or how much time you have, but they're only a few hundred bucks. Check these out http://www.ebay.com/itm/like/151453257908?lpid=82  
Logan

2004 Dodge Ram 3500 QCLB with '97 12 valve swap, 5 speed, 4x4

SOLD: 1995 Dodge Ram 2500 SCLB, 12 valve Cummins, 5 speed, 4x4, lift pump, benched P7100, injectors, cam, port/polish, valve springs, studs, O-rings, coated pistons, balanced bottom end, intake and exhaust manifolds, S363/S480 compounds.