Hey guys, so im fairly new to the world of turbocharged cars so ive got some Q's. I just bought a 91 TSi with the standard 14b turbo, i want more power out of the engine so im considering upgrading to the 16g so my questions are: What would the HP gain be, do i need to retune the engine, do i need a safc... basically, what do i need to do in order to upgrade and is it acually worth it? or should i just get performance cams rather than the turbo?? thanks for your help!

if your upgrading turbo's you need to get a new fuel pump (190 should do, but 255 wouldn't hurt either) and you'll need some new fuel injectors 550 plus will sufice. and a FMIC will help those mods out greatly. oh, and depending you may need to upgrade you ECU. cams should be your next mod after those though. keep us posted on it.

there are 3 versions of the 16G so which one are you talking about.

Yes the upgrade is worth the money.

First and most importantly, you have to look at your car as a whole, what does it need in terms of maintenance. Do that first.

When you install a bigger turbo what you are doing is forcing more air into the engine. So now you have lots of air and not enough fuel. So to counter that you need to beef up your fuel system. (injectors, fuel pump)

Before all that you should have an intake and full 3 inch exhaust. Including down pipe.

Before the actual turbo upgrade There are certain parts you need, real boost gauge is just one.

Yes the 16G is worth it.

ok, im having the exhaust which is 3in turboback no cat done on fri so.. ive heard that for a 16g that stock fuel system will be fine but i want the 255 pump. oh and im looking at the TD05 H 16G evo III so will i need to retune and how can i get that done.. if anyone that reads this has any kind of info on the subject please reply, your guy's advice is greatly appreciated!!!!!!!!! :liebe011:

I think you should slow down and do some researching.

No you will not be fine with the 255lph fuel pump. you will be over running something.

I'd max out the 14b first.

^^^I agree, max out the stock 14B with mods that will accept the 16G and then go get the 16G

ok il do that, what is max boost on a 14b?

On my old Talon I had a 14b (upgraded the housing though) and with 550s and a 190 fuel pump pushing 19psi of boost I had around 240 horse to the wheels and around 255 ft/lbs of torque. I also had minor stuff like exhaust, mbc, boost gauge, etc... I did need an S-AFC and a logger so I could do some basic tuning. With DSMs, you kinda just go as lean as possible until you knock, then go rich up a little bit.
You can get a decent amount of power out of those 14bs, however you end up pushing the hell out of it. I had a friend who managed to get 312 to the wheels out of the 14b.


However, you're also going to want to make sure the basic stuff is done. Has the timing belt been changed? Do you still have the stock head gasket? Stuff like that. I had rebuilt the head, used a cometic gasket and arp studs.

With upgrading to a 16g, you're going to want those supporting mods. The stock injectors/fuel pump will technically work, but not well at all. I would advise going for a 255 fuel pump and maybe 660 injectors, just so you have a little bit of room to play. A front mount would help, along with a K&N and hard intake. I'd go with 2.5" piping for the fmic as well.

Oh yeah, with the proper mods a 14b can hold 20 psi to redline.

i just bought one today, let's see how that's going to hold up. I was thinking of rebuilding it just to make sure the turbo doesn't give in during boosting. :thumbsup:

With what you'll spend on rebuilding it and then having it rebalanced, you could have bought the 16G new with some supporting mods. Just keep your T-25 handy. I was looking at a set of stock turbos for my car, $100 for both but they needed to be rebuilt... I could get the kits for 120 each (I have two turbos) shipped. SO now I'm up to 340 before the rebalance.

I bought two new ones for $350

Well i get what you are saying but i'm going to rebuild the turbo myself and then send it to a local shop to get it rebalanced. Rebuilding it is not too hard, Well at least for me it wont... i hope. Here's how to: Turbo rebuild :thumbsup:

hmm I don't think you get what I'm saying. Because what I could have spent on turbos and rebuild kits just about bought me almost new good turbos.

I got a 14B for dirt cheap and has no shaft-play. The reason why i said i was thinking of rebuilding it is to prevent anything in the long long long run from not working. The car is a daily driver, i need things to be reliable and that last. I'm trying to keep things simple, yet i also want power. I already have searched and know that a 14B can take you up to the 285-300Hp's range with the proper parts and a nice tune...I think i would be happy with that. :thumbsup: