JonELongDong

O Im not saying it cant be done just not with the usual mods such as CAI etc. Thats why I started looking into f/i and I am pretty sure twin t's is the way Im going to go. Im going to talk to a few local race shops and get multiple suggestions, compare share with you guys to help me sift through the B.S. and then make a decision who I will go to, to make it happen.

JonELongDong

Ok here is a semi-specific question that has been overlooked. What about back pressure. Thats what I was trying to get at when I was referring to my exhaust. I know certain setups can cause more or less back pressure and while I am reading I am trying to understand the relationship b/p has on boost and the turbine. Who wants this one?

exitwound

Backpressure should be a non issue when you get a turbo, your gonna want the least amount of backpressure possible and the most amount of hot flowing exhaust. Depending on the setup/tuning of the engine backpressure before the turbo will be all but eliminated. The hotter free'r flowing exhaust is going to spin the turbo faster so you want all you can get. This is one of the strikes against STS.

exitwound

I see your in Katy, go to Houston Performance. They are by far one of the best shops around your area. They specialize in forced induction on Ford's modular motors. They will be able to tell you anything and everything you will ever want to know about what you are planning.

Here is their website:
http://www.houstonperformance.com/

blackbetty

imo you can run 6 lbs, no problem on the stock internals, but higher then that and your pushing it, you can run dual 14b mitsubishi turbos, and use the internal gates, the min fuel id go with is 400cc injectors, but 450s would be a safe starting point (the factory fuel injectors on the dsm), thats about 42.8 lbs/hr, with a 255lph intank pump. your going to want to do other small things but those will be the main 2 things that most people look at, also what do you plan to do about air metering, i was planning on a blow thru setup....you have alot of things that are involved...and overlooking any point is suicide....remember that....

also cams from my experience arent needed for a turbo....

i also am just giving it more of a oomph to it, just to add some *****...not to race it, well not as a hard core truck, just for fun...

blackbetty

i plan on running a 2.5 inch pipe from each turbo (called a down pipe) and then into a y merger pipe to exit out via my cat back (3 inch) with a dump to alleviate back pressure at the track for higher performance

certain flow rates require certain pipes....

JonELongDong

Exitwound-thanks for the link to the shop. Are you in Houston? Seriously though I will be talking to them in the near near future. Any one in particular that you have dealt with. Do they do alot of custom fabrication as well?

Blackbetty- I wasnt planning on more than 6-8 psi although I know Triton V8 is right once I feel it I will want more, just got to stay sane about it. My next question was going to be about injectors since I see people running ginormous injectors I know I wont need. 255 lph is what I had planned and also a blow through setup.

COOLING whats the best way? How much fabrication do you expect to have to do to mount the turbos you suggested and run the proper sized pipes? Do I need to have them mounted downward off the headers or up above......if that makes sense.

blackbetty

ok, on a single, the hot side is the higher of the fab setup, on the twin set up, you have alot of cooling, i plan on using a twin ic and then mounting a y pipe, to the meter, to the tb....its cheaper and as efficent as i need for now....

the hot side on twins is easy to make, you flip the manifolds so they fire foward instead of rear, and mount up a turbo to them, just get some mani's made with the flange attached...not hard at all...thats how i plan on it atleast...

custom turbo's need a knowledge base and a hands on base....if i were you id plan atleast 1 year out to do this to properly learn and buy all needed things to run a small street setup

btw, if you can, buy the book called maximum boost by corky bell, its old but the knowledge is all the same for you to build on

blackbetty

also on injectors, they go na, supercharged, and turbo as far as how big you need to go, so to put out the same idea of power, a na injector is at x value where as a sc is y and a turbo is z....the x may be 450cc, the y is 515 and the z is 570 for example...


just random numbers tho, nothing to base anything on fyi

exitwound

No, I am from Dallas but I used to go to Houston a couple days every week with my last job so I am very familiar with the area. Yes they do a lot of custom fabrication so they can build systems from scratch.