I was just wondering about some serious power upgrades for my Army truck. I was gonna put on a 4 inch streight pipe on it and turn up the feul pump. That being said i love black smoke and i want this truck to do that when i get on the throttle, is there any way the 6.2 can be upgraded to get some better power and not blow it up? Also where is the feul pump adjust screw? i dont want to yank things apart and not know what they are. Any imput would be great.

Thanks

that engine you got is a military J code 6.2 theyre the most powerful 6.2 right outa the box since they got the big injection pump and the big precups. i dont know how far you can crank the fuel on these engines without a pyrometer. and to get to the fuel screw heres instructions: http://assets.bankspower.com/manuals/429/96291-v2-web.pdf its in the back part of the book. and your best bet for power is a turbocharger.

that engine you got is a military J code 6.2 theyre the most powerful 6.2 right outa the box since they got the big injection pump and the big precups. i dont know how far you can crank the fuel on these engines without a pyrometer. and to get to the fuel screw heres instructions: http://assets.bankspower.com/manuals/429/96291-v2-web.pdf its in the back part of the book. and your best bet for power is a turbocharger.

Thanks man i'll take a look at that, I'd love to do a ton of power upgrades but even though its the strongest 6.2, will adding all that power be to much for it?

well putting on a turbo and keeping the boost around 8 psi and the EGT's lower than 1100*F my truck has a turbo but its not completly wound up all the way yet since i dont have a pyro and boost gauge to tune it with. but im sure the bottom end is good to aroudn 200 horse

Yea, Now i'm assuming you used the banks kit, would it be ok to use the parts of a 6.5?

well putting on a turbo and keeping the boost around 8 psi and the EGT's lower than 1100*F my truck has a turbo but its not completly wound up all the way yet since i dont have a pyro and boost gauge to tune it with. but im sure the bottom end is good to aroudn 200 horse
good to around 200 HP?
how much power do these motors put out stock?

good to around 200 HP?
how much power do these motors put out stock?

Most 6.2s range from 140-160 HP great on fuel but no animal like cummins or powerstroke

Hmmm.
my truck is Just sooo powerfull, and great pulling and high top speed. I just figured it had more than 200 stock. torque is a wonderful thing, but it don't make top speed...

I'd love to get at least 250 HP with mine, I'd would like to know how though lol.

db2 pump only capable of about 200hp

If you need more fuel, one word: propane.
Most of us can't max out the pump and burn the fuel efficiently to turn it into power with out turbo.

a 6.5 turbosetup will work but you may need to use short injectors. If you crank the db2 all the way up and add the turbo you should see over 200 hp. I'll let ya know. I'm doing one right now. Nice thing about the M1008 is plenty of room up front for an intercooler which is what I plan to do so iat should be managable. Nice open exhuast should work out for egts. You will only see high egts without the turbo. withit should be managable.
A 6.5 with mild chip and turbo can pump 230hp easily, I don't see why a jiuced up 6.2 with turbo can't come close.

A 6.5 with mild chip and turbo can pump 230hp easily, I don't see why a jiuced up 6.2 with turbo can't come close.


the db2 pump is capable of 25 hp per cylinder.
the ds4 on the 6.5 is higher, can't remember the number

Diaric, I have to disagree with you. The smaller DB2 pump on the 6.2 might have that limitation, but the 6.5 DB2 is the same size as the DS4. I don't see how the DS4 being electronic would really be able to increase power by that much.

Diaric, I have to disagree with you. The smaller DB2 pump on the 6.2 might have that limitation, but the 6.5 DB2 is the same size as the DS4. I don't see how the DS4 being electronic would really be able to increase power by that much.

agreed!

the DS4 is alot bigger its got 4 plungers instead of 2 hence the name DS4 and DB2

K, well, I didn't know that; I just (thought I) knew the plunger sizes were the same, didn't realize the DS4 can literally dump out twice the fuel.

Looking through the forum tho it looks like there's been talk of rigging up a DB4 (four plunger, mechanical pump) to a Detroit. That'd be beastly.

that would but EGT's like the pistons would be through the roof after one drive up the road and back.

not if it was turboed maybe ? we need dieselpro on this one. I have also heard of the DB4 marine pump.(think that's what it's called) but here's the thing like was said the 93's had a db2 and a turbo and they ran pretty good so ....

I'd love to get at least 250 HP with mine, I'd would like to know how though lol.

if you are shooting for 250 (or even 200 for that matter) you are going to need work on the bottom, you will need main studs, a girdle and head studs at the least.

Check these numbers : DB2833-4974 , DB2833-5722 . Supposed to be DB2's around 300 HP .

the DS4 is alot bigger its got 4 plungers instead of 2 hence the name DS4 and DB2

Just to let everyone know i'm kinda new to the diesel world (Wishing my HD was a Duramax) and i appreicatiate all the help, my question is what do you guys mean by DB2 and DS4 :lol:

DB2 mech IP used >93 except for some vans
DS4 Electronically CONTROLLED Mech IP. drive by wire. Only used on 6.5s not 6.2 although can be in a 6.2 for 6.5 transplant.

is the ds4 a good pump? my 6.5 motor came with the pump on it, but the brain was removed from it.
is it worth getting it repaired and getting the brain added?

personally i dont like em. but thats just me. if you get a pmd for it and relocate the pmd off of the ip so it keeps cool they work good. and theyll easily outfuel a DB2 since they have 4 plungers and each plunger is the same size as 1 plunger from a DB2.

personally i dont like em. but thats just me. if you get a pmd for it and relocate the pmd off of the ip so it keeps cool they work good. and theyll easily outfuel a DB2 since they have 4 plungers and each plunger is the same size as 1 plunger from a DB2.

In English :sorrysign

Translation on behalf of 4320: " If you get a Pump mounted driver for it and relocate the pump mounted driver off of the injector pump so it keeps cool, they work good."

Stanadyne injector pump 101:

First, the basics. Abreviations.
IP=injector pump
LP=lift pump
PMD=pump mounted driver
EGT=exhaust gas temperature
IAT=intake air temperature

Next, Pump overview.
The d series stanadyne injector pumps are a rotary style injection pump that have been used widely by gm, navistar and also on many models of john deere tractors even up to today. The DB series is mechanical and as 4320 stated, the 2 stands for the number of fuel plungers the pump has. Fuel plungers do the work of squirting the fuel through the line under pressure and the larger the plungers, the more fuel it is capable of delivering. The DS series is an electronically controlled unit with throttle by wire and is truely fairly advanced for the time that it was released. To my knowledge, all 6.2s were originally equiped with db2 pumps in some flavor or another. The first year of the (1993) 6.5 turbo diesels were also equiped with db2 ip's and then replaced in 1994 with the ds4 pumps.

Finally, Aftermarket.
There are hot rodded aftermarket db pumps available both in the db2 and db4 versions. There are also certain pumps from certain trucks that may use a slightly larger set of plungers and other tweaks. You can find all of that information in the faq at the top of the first page of the 6.2 forum. My personal opinion is that the mechanical pumps are the way to go. There are way too many sensors and electronics on a ds4 pump in my opinion to consider running one.

Hope that helps
Joe

Translation on behalf of 4320: " If you get a Pump mounted driver for it and relocate the pump mounted driver off of the injector pump so it keeps cool, they work good."

Stanadyne injector pump 101:

First, the basics. Abreviations.
IP=injector pump
LP=lift pump
PMD=pump mounted driver
EGT=exhaust gas temperature
IAT=intake air temperature

Next, Pump overview.
The d series stanadyne injector pumps are a rotary style injection pump that have been used widely by gm, navistar and also on many models of john deere tractors even up to today. The DB series is mechanical and as 4320 stated, the 2 stands for the number of fuel plungers the pump has. Fuel plungers do the work of squirting the fuel through the line under pressure and the larger the plungers, the more fuel it is capable of delivering. The DS series is an electronically controlled unit with throttle by wire and is truely fairly advanced for the time that it was released. To my knowledge, all 6.2s were originally equiped with db2 pumps in some flavor or another. The first year of the (1993) 6.5 turbo diesels were also equiped with db2 ip's and then replaced in 1994 with the ds4 pumps.

Finally, Aftermarket.
There are hot rodded aftermarket db pumps available both in the db2 and db4 versions. There are also certain pumps from certain trucks that may use a slightly larger set of plungers and other tweaks. You can find all of that information in the faq at the top of the first page of the 6.2 forum. My personal opinion is that the mechanical pumps are the way to go. There are way too many sensors and electronics on a ds4 pump in my opinion to consider running one.

Hope that helps
Joe

Thanks man, that helped alot. That being said do most 6.2s come with DB2s and if they do can they be upgraded to a DB4?

Good luck finding one, there are not a whole lot of them around....

must find must find must find must find...................

Good luck finding one, there are not a whole lot of them around....

What do you mean?

The DB4s are fairly rare pumps, I don't think GM made alot to begin with.

sorry guys im terrible at trying to explain stuff on here. my bad!

The DB4s are fairly rare pumps, I don't think GM made alot to begin with.
Yeah, might as well be look for the pot of gold at the end of the rainbow...

Check these numbers : DB2833-4974 , DB2833-5722 . Supposed to be DB2's around 300 HP .

(DB2833-4974)is a marine pump. 250 hp
(DB2831-5722)a high output 4 plunger 310hp

http://www.dieselplace.com/forum/showthread.php?t=122758

its been stated in these forums many times that the automotive db2 is rated for 200hp and if you need more fuel to get a mechanical 6.5 pump. probably easier than finding a marine ho pump

Thanks man, that helped alot. That being said do most 6.2s come with DB2s and if they do can they be upgraded to a DB4?

the mounting flang is supposed to be the same. I don't know anyone who has went to db4 but It should be doable. Main concern would be to get enough air flow through the motor to make use of the added fuel. Port and polish on the heads couldn't hurt and maybe a custom cam grind and larger turbo. Would be a sweet motor.

the mounting flang is supposed to be the same. I don't know anyone who has went to db4 but It should be doable. Main concern would be to get enough air flow through the motor to make use of the added fuel. Port and polish on the heads couldn't hurt and maybe a custom cam grind and larger turbo. Would be a sweet motor.

Agreed, Ever do a 4 inch straight pipe on a 6.2?

i got a 3" straight pipe on a 6.2 but i got a turbo to quiet it down just a tad :D

Agreed, Ever do a 4 inch straight pipe on a 6.2?

I'm finishing up my turbo install and it will be 3 inch from the turbo back with no muffler. I hear that a n/a 6.2 (another abbrivieation, Naturally aspirated= non turbo) with a straight pipe is abnoxiously loud.

I'm finishing up my turbo install and it will be 3 inch from the turbo back with no muffler. I hear that a n/a 6.2 (another abbrivieation, Naturally aspirated= non turbo) with a straight pipe is abnoxiously loud.

Noooo, it is a beautiful sound!

http://www.youtube.com/watch?v=LHCn9BeUyeQ&feature=channel_page

That is 3" with a 4" tip if you are wondering.

In that video, it's way too quiet for a straight pipe with no muffler whatsoever.

In that video, it's way too quiet for a straight pipe with no muffler whatsoever.

how bout this:D


http://www.youtube.com/watch?v=rbegvMqPGvE&feature=related

The truck is exploding at the end of the video? ;)

They can't be that quiet without mufflers? I have flowmasters in what otherwise seems to be the stock exhaust, and it sounds very similar to the video. It doesn't appear to be as loud as in the video, but that's because the higher frequencies are dampened by the mufflers.

Maybe it's the recording ...

Check out this one, I took it last June: http://www.2shared.com/file/8020104/64688c0e/pict0030.html

In that video, it's way too quiet for a straight pipe with no muffler whatsoever.

Nope, absolutely nothing but regular old 3' pipe.

It must be the recording then ...

Could be differences in camcorders.