Im new here guys, and been doing some homework before parking the car to install a turbo this winter! so i got a 1998 mustang gt 4.6 with 70k miles. I know the basics of turbos but dont know how to completely install one without asking questions, im new to muscle cars. just graduate high school. so i was hoping people with more experience could give me a hand. I was going to go with twin turbos. But I understand most of the basics. but i only have so much money and im a person that likes to do things as i go to make it better down the road. I don't want to buy a cheap chinese turbo kit so i'm going to make my own. I understand i need to modifie my manifolds into the turbos. I know i need oil lines, innercooler for the turbo, and piping work into my intake. but heres the thing, i want twin turbos, but i dont want to make the psi up to high so i have to replace engine parts to handle it untill later. i just want to install it and keep the psi low, so mainly what i am saying is i want to get a turbo in so the plumping is complete and running so later on the road i can upgrade parts like fuel pump, injecters ect and better turbo. soo since that is said. What type of turbos should i get that would be good for my car and later down the road upgrade the turbos and engine parts. So if i install twin turbos and keep the psi low enough for my stock engine. Do i need to program my computer? ect. I understand exhaust has to run through turbo. Then turbo pushes airout into an innercooler, then into my engine. So any advice please? Thanks you

 

Well saying that the stock block can only take 450-475 rwhp so if you try twin turbo, you'll pretty much need to redo the whole engine, and since its 2 valve you wont get very much power. If I were you I'd look into buying a gently used or rebuilt 03-04 cobra motor off ebay or somewhere. You can get one for $5 grand or so and they'll come with over 400 rwhp stock. They are 4 valve and come with forged internals, which means they can safely take over 700 rwhp and some people have even got over 1000 (not recommended). Just my advice, good luck though!

 

I have some questions....
Why on earth would you go twin when, nowadays, with the ball bearing turbos even an extremely expensive single one would be just as good as twins? A high quality single with ball bearings and the works would easily spool just as fast as a twin setup.

You said you just graduated high school, have you ever ridden in a vehicle that had anything close to the rear wheel HP goals you have? I can say from experience, I think you would be more than happy at around 400 RWHP for quite a while.

Keep a couple things in mind, building a 13 year old car and making it reliable is a real challenge on a large budget, and nearly impossible on the fresh-out-of-high school budget, and that a car with 400 RWHP is a real animal on the streets, and a lot for the average 18-19 year old.

Now, I'm not saying that you can't someday achieve twin turbos if that is what you absolutely have your heart set on, but I think most everyone here will agree that you should start smaller, and a lot less expensive and build as you go. Don't shoot for the stars immediately.

*ALSO* If you are only thinking of this build as a way to "defeat" your tuner loving friends, you are sure to end in disaster.

 

For the price of a cobra engine, you might as well just buy a cobra with around the same miles as your GT. That's just what I'd do anyway.

Also, could you tell us what you have so far? I'm assuming this isn't the first mod you are making?

 

do you know how to weld? if not, thats probably one of the biggest expenses. along with being able to mock everything up and getting everything to fit.

fuel system, you at least need a SVT focus fuel pump (255 lph) for 400 rwhp. you need fuel injectors, i'd recommend 39's or 42's. you also are going to need a new MAF, lighting maf will do for starting.

yes you need your computer reprogrammed

no need for twins, with a single you'll get more than you ever need. these motors arent 4-banger ricers that cant spin a single larger turbo. having twins is double of everything, double the complexity, double the cost, double the problems. stick with a single. a T70 or T67 would be a great all around turbo, with a T62 being really quick on the spool.

realize, that even the most budget single build will run you 1600+ and thats being very very limited.

 

yes i took a welding class and have spent plenty time of practicing, and if i cant do it, i got a neigbor that knows everything about cars. and to the person that was talking ****, i have drove my grampas 02 bullet mustang, and took his 06 vett to prom, and to the movies and he has that pushing around 400hp and i used to own a big truck that i dumped alot of money into. but traded it for a stang cause it gets more chicks, im going to do a single turbo, im about to order some longtube headers, or short idk yet, but will this affect my turbo setup? or can i modifie them down the road to work? and i got this car completly stock with 69k miles, so there is no mods besides i put a aftermarket air filter

 

they only made the bullit in 01 and it dosent make much more power then a gt, id imagine you'd should probably hold off on ordering anything yet untill you have a full parts list. especially since the turbo mounts to exhaust manifolds,be kinda silly to order LT's and not need em. FWIW.

 

SUch a fail thread

 

Gonna make this as simple as possible, to build the whole car to what u want your gonna need over 10k. Considering its apparently obvious you don't have the expereince needed to do this your self........it would be cheaper for you to drop 40k on a used 07-08 shelby gt500. Not trying to be a d*ck at all, and considering what u wanna do with this car the shelby will "get you more chicks" over a 94-98 mustang.

 

long tube headers on a turbo... think you need to do some research... not gunna work unless its a ****box rear mount setup...
besides the fact that LT's are designed for maximum flow, and pre-turbo there's alot more backpressure, so its kind of useless to spend all that money for something thats not gunna fit anyways.