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I am looking into buying a 6.2 or 6.5 engine as a project to build it into a stronger engine as a candidate for a sled-pulling truck. I have found 6.2 engines for sale at a good price and am looking at a military 6.2 engine out of a hummer. At the very least I'd like to get the bottom-end...

Nice pics of the ATT, does look good, and those are really great dyno numbers considering the few mods you have done to it and with the original GM-3 turbo. Did you have any mods done to the injection pump to put out more fuel when it was rebuilt or just a "stock" rebuild that you then decided...

That is the truth about new trucks and the electronic systems on board, they can leave you stranded too. And you're not missing much with how they are setup nowadays. I'm a mechanic for Freightliner, so I know all about it. I am always thinking it in the back of my head, but every setup is...

Yes, I do know that 1994 had the 2 different spec pumps with the 5068 and 5521. He has a 5521 injection pump on the engine now, which is off his original 234k mileage engine to the Suburban. That's now laying on my storage building's floor because we had to put another engine in it due to that...

Thanks for the reply. My friend's 94 Suburban looks like it will be in need of an IP here very soon so that's why I asked. I have a local diesel fuel injection shop that I can call to ask and get a price on one. They are a major Stanadyne dealer so they know those pumps upside down and...

I had a question where could one buy a DS4-5942 injection pump? Are you pretty much forced to buy it from a diesel fuel injection shop? Any other places and price? Seems like it's a good one to buy w/ all the updates and latest, greatest parts. Thanks.

Whoops nevermind, I just got done reading your 7 page thread a few down from this one on the forum page and on your project and have to say that is a really nice 6.5 that you got and will be a great running, unstoppable engine w/ all those upgrades to it. Will be anxious to hear that engine run...

Oooo....a DB4, do you have any pictures or more info on that injection pump? Do you roughly know how much fuel output it will be capable of?

Now all we need is a group buy on forged steel cranks! :hihi: But anyway probably wouldn't be that many on the list though.

Got any pictures?

This is a very good deal on price and when my buddy is looking to buy his 4" exhaust setup for his Suburban we'll be coming to you as a customer that's for sure. Thanks Leroy.

That's awesome and interesting at the same time! So does that mean you can technically rev the engine to 4900 rpm if the tranmission would allow? That should be plenty high enough rpm for one of these engines as the stock power outputs were made at 3400-3600 rpm. I wonder what's exactly...

On the DB2 pump built by Columbus, did they tell you how much fuel it will flow or a HP number it will support? Did you get larger plungers installed instead of the .31" factory size. The picture of the pump has me drooling too. Sounds like the truck will be an awesome runner and get us some...

So are diamond precups the best units to install in the 6.2/6.5 cylinder heads and how much roughly do they lower the compression? If I would want to get a said engine down to 18.5:1 I think the precups and probably a slightly thicker head gasket then .01" ought to get me there. How much would...

I'd go for the Scat cast steel crank any day over a stock crank and then install a Fluidamper balancer. You have yourself a good, strong bottom end to build on with then. $299, hey that's a good price too!

I am aware of the advantages of an inline injection pump as yes they do have a plunger for each given cylinder of the engine. The fuel delivery capabilities are endless and they are better and more reliable then a distributor/VE or rotary injection pump. I have a governor spring in the...

Meant to reply back sooner, but Ace wanted to thank you for the quick reply and straight forward facts on axles used in the trucks. It helped me out a lot and I ended up passing on the truck because of that 10 bolt front axle. My buddy and I are looking for an 82-87 GM truck for a pulling...

That's interesting about the DB2 6.2 governor spring being used in the 6.9/7.3 pumps to turn higher rpm. My question is what rated springs were used in the 6.2/6.5 pumps (of course mechanical) that is? And can you get, say a 4k or 4200 rpm governor spring to install in a DB2 mechanical pump...

Hi, and thanks for all the info/knowledgable replies. Looking at a truck for sale that needs a converter and might try to see about getting one on Ebay as there were some decent deals from a few good sellers. Another question the truck is a 1982 K20. It's a 3/4 ton 4WD truck and would anybody...

Hi, wanted to see what is the best torque converter to buy as far as price and quality goes for a TH400 auto behind a 6.2 diesel? I know the stall speed has to be on the lower side and around the 1600-2000 rpm range for the diesel. Or should it be rated lower then that? Looking at a truck for...