JakeHD3

Alright, I have a 2002 chevy 2500hd w/ 6.0l that I'm turbo charging. I already have the turbo but i dont want to spend a butt load of cash so heres what i was thinking. Front mount using homemade log style header with a cross over (single turbo), a 50mm wg and bov. I really want to skip the intercooler due to lack of room and put a water meth injection kit on it but tell me what yall think. For the computer i have a diablosport programmer so i can play with the timing. Im not looking to turn my intake into an air compressor so im not doing any internal mods to the engine 5-7 Psi MAYBE 10 max. I've never done any turbo work before but i learn extremely easily so i think i can do it just from the info on here. I would just like to know any tricks, tips, advice on where to get cheap parts (mandrel bent piping, wg...) , issues that i may run into, and what not.

Thanks, Jake

busa4

turboing anything is tough to do on a budget especially with a v8 and a first time builder. there are a lot of misc stuff that needs to be purchased. average price of a home made 4 cylinder build is 1500.00. check ebay. you can purchase mandrel bent steel and aluminum tubing in kits for about 50-100.00 each kit. i would purchase schedule 10 pipe for your exhaust manifold as it will prevent cracking due to the heat and weight of all the exhaust plus the turbo. less than 7 psi doesnt require an intercooler but it would help with added hp. if you go over 6 psi then you will need an intercooler. your programmer will not work unless you send it back the the mfg and have them install a boosted map in it if they even have one. 5-7 psi will not need any timing adjustments but you will need a good amount of extra fuel which your programmer can not do. you will need larger injectors, a 2.5 bar map sensor and a custom tune.

JakeHD3

Sorry i did not specify, i do have larger larger injectors off an 8.1l and I'm gonna call speedtek about the boost map tomorrow. What i meant by budget is less than the 6000 wanted for a kit on my truck. As for an intercooler its not that i dont want one its just that i dont have much time to make room right now and i will fix that later as my truck is my never ending project. And with the new map i will need to program my computer for it correct.
Thanks for the info!

I would also like to know more about the oil set up on my truck. can i pull it from the oil filter block? any info is greatly appreciated.

BoostedFC

I would look into possibly mounting a small intercooler somewhere it can get good airflow. As water injection does work, it is my opinion that it's really just a band aid mod. You could always use one of the water to air barrel style intercoolers in the intake plumbing. PWR as well as some other companies offer such coolers.

JakeHD3

Ok i'll give them a look, Thanks

busa4

for 6000.00 you can buy a kit. the escalade kit should work. same motor.

the new map is the computer program. your just reflashing a new map into the computer so extra fuel can be injected under boost with the larger injectors.

you can get oil feed from a couple of places. the best place is to get it from the oil pressure switch. if your oil filter housing has plugs in it you can also get it from there.

JakeHD3

The map as in the maifold air pressure sensor itself. Did you mean by boosted map to program my computer to accept the 2.5 bar map sensor or be able to read out basically a "compressor map" when data logging? Sorry im still trying to figure out all the terminology. And with the kit I'm not looking to spend that much and I will like the experience of turbo charging something.
I have read that with only 5 psi a new map sensor is not needed, is this correct?

Thanks

busa4

it doesnt matter what psi boost you use the computer will not be able to see anything above 0 psi so it is very difficult to tune for this since you have to mainly tune with rpm and tps, not load. if the computer is tuned this way you will have intermittent lean or rich spots in the tune.

for example: your cruising down the highway at 2000 rpm and the computer sees vacuum. all is good. you want to accelerate a little bit so you give it 1/4 throttle and the vacuum/boost gauge goes to 3 psi boost. your stock map sensor and computer see 0 psi so it will then refer to what the computer was remapped(programmed) too at 2000 rpm and 1/4 throttle and it will most likely lean out at that point. since the computer cant see a load above 0 psi it makes it very tough to tune.


if your computer can read a 2.5 bar map sensor then buy one and have the computer flashed to see the 2.5 bar map sensor. it will make tuning much easier and your motor will run better. if your computer cant read a map sensor above 1 bar then you dont need to buy a 2.5 bar map sensor as it wont do any good. the cheapest option for you since your only going to be running low boost is purchase an extra injector controller. this way you will use the stock computer program and the extra fuel will only be injected when the extra injector controller sees boost. you can mount the injectors in the boost pipe before the throttle body or you can mount an injector at each intake runner(recommended).

91GT347

Have you got started on this yet ? You should be fine with just meth inj. Thats all Im doing to keep it cool. I'll be around 20 psi. I know a BUNCH of people that dont use IC. If you want it to be perfect, I would have it tuned on a dyno. Thats about the only way to make sure its as close as it can get to right. Alot of mailorder tunes will work, and work well. They can leave alot on the table, and still run good though.

OneBadV6

first off what turbo do u have for it, whats ur goals when its done,whats the trucks primary use ? and i dont belive ur diablo sport tunner will be enough to tune it when its done.u deff need to buy or goto a shop that has hptunners and have them tune it for u