More Power
 

:confused: I am Buildin a Drift pick up from a estate 940 1995, i am trying to find out how to get more power from my D24T i have presently got a side exit exaust from the down pipe back thats the hight of it... any suggestions would be gratly aprecated..

Thanks
Andy :)

Hi and welcome to the forum. The main pump adjustments are covered in the link below in good detail. It is from a dodge cummins diesel site but the pump is the same and the writeup is good. Read the link below on runaway first.

http://www.dieseltruckresource.com/d....html?t=158962

http://dodgeram.org/tech/dsl/more_power/Power_ve.htm

Take a look at some of the threads on turbo combinations. If you really want to up the power I would get rid of the stock turbo, the compressor side isn't all that efficient and the exhaust side has a restrictive design as well. Adding an intercooler should also be near the top of your to do list. Depending on how far you want to go, next would be head studs so you can really turn up the boost. With a better turbo, intercooler, and correct pump timing you can push an easy 15lbs of boost with the intercooler and the car will be pretty fast.

Check your injection timing as well (not detailed in the cummins write ups) and time it towards the top of the spectrum or maybe a little higher. I would shoot for .90 to 1.0mm.

With a larger turbo I would step up the downpipe as well, to 2.5". The factory air filter is good size, but you can open the box up a bit by removing the intake baffle that goes into the fender, and "swiss cheesing" the front of the box behind the headlight for more air flow potential.



Jason

Were to get?
 

gud gud :) were can i get these parts ; turbo ect.... whats the biggest turbo that will fit it? would you know were i could get adj shocks and lowering springs?

Thanks
Andy :)

There are a few places that sell shocks/springs/sway bars, I think IPD is one of them, and there may be others, I haven't really looked into that stuff yet. If no one else chimes in check over at turbobricks.com, there is alot of good info over there and most of those guys have lots of mods to their cars.

Biggest turbo you can fit would be what I did, the T3-T4. While you could fit a bigger if you cut into the frame, a T3-T4 has more potential than our engine can use. Check over on the turbo thread for more info on the sizes and such, I don't want to retype all of it. Only thing I would recomend is a smaller exhaust housing than I used if you went with the hybrid. I would go with a .48 A/R for better all around performance and good spool up at lower RPM. My turbo is a chinese knock off turbo from ebay (though I made it out of a few different turbo pieces I had laying around). All of them I have seen have the larger .63 A/R exhaust housing which like I said is a little large. You will have to modify the oil inlet and modify the waste gate canister to fit as its pretty tight. I have pictures over on that thread.

jason

When you say a T3/T4 has more potential than our engines can use, what exactly is the limiting factor for the engine? Is it fuel delivery?

Exactly, fuel delivery (and you wallet).

Coilovers, sport shocks and related stuff: http://www.trianglesunlimited.com/
Stock replacement parts, and the cheapest (and new) lowering springs: https://ssl.kundenserver.de/www.skan...dex.shopscript
One or two interesting things: http://www.fcpgroton.com/

Fuel delivery and also just the size of the engine. A large trim T4 compressor housing and matched compressor wheel can push 30lbs of boost into an engine larger than ours. It just has more than enough airflow capacity to satisfy all the air our 2.4 engine can take in. If you had the fuel to go with it, 30lbs of boost would probably blow the pistons through the bottom of the block anyway! They are only gonna hold up to a certain level.

jason

Ah, that makes sense. I wasn't sure if engine size was a factor. I always hear people saying that turbos are effectively "displacement replacers." I guess there has to be a limit though.

My goal is to get 180 horsepower and close to 300 lb-ft. of torque using a D24T block, D24 head and cam, T3 .60/.48 turbo and ebay intercooler. I'd need it to be livable day-to-day and still get decent mileage (25+ mpg). Is this realistic?

I think so, but I would step up to a T3/T4. They are around the same price and the larger T-4 housing won't need to work as hard to push the same boost as the smaller T-3 compressor. Also, at a given boost level the charge temp should be cooler compaired to the smaller T-3. I would love to strap mine to a dyno here but it would be a waste unless I had a manual, the auto would just slip the whole time. I really don't know what kind of power that engine pushes at say 15lbs of intercooled boost along with decent fueling. Stock it was pretty clean burning, low boost and no intercooler and it was what, 104 hp or 110? I forget. Either way, it shouldn't be hard to get to that level. You may need head studs to hold the boost it will take to make 180hp though.

Jason

Yeah, head studs are definitely in the plan. I've already got most of the parts for my turbo (Garrett T3 off of a Mercedes that I plan to pilfer the turbine housing from and a T3-based Hitachi HT-18 off of an RX7 Turbo that I'll take the compressor housing from). I wish I had known what cars came with T4s from the factory before I bought all these turbo parts. Oh well. Would a T4 compressor wheel help at all or is it the T3 housing itself that's inefficient? I'll make a new thread with pictures of my "junk" turbos tomorrow.