New turbo, what else do i need?

**AaronB9006** · 09-08-2016,06:30 PM

So, im upragding my 1.9 TDI mk5 turbocharger, replacing it with one that kicks near the 200Bhp mark, what else should i upgrade with the turbo? im thinking injectors, anything else that would make it more effitient/ more BHP?

**zollaf** · 09-08-2016,06:34 PM

bolting on a new turbo wont make any difference unless you map the ecu. how much power do you want ?

**AaronB9006** · 09-08-2016,06:36 PM

Yeah, so i have already got it remapped. I was offered eco, eco and power or power, and i chose power.. do i still need to get it re-re mapped, with a dyno? I want near 200 break

**zollaf** · 09-08-2016,06:38 PM

yes, its mapped to the current turbo. fit a bigger turbo blowing more air and the car is still mapped to the old one so will fuel accordingly.

**AaronB9006** · 09-08-2016,06:40 PM

Okay cool thats fine, can you explain how turbo and injector size is measured? i have no idea about turbos and get confused when i see like PD150 injectors ?? Can you give me some guidance, so i can fit it all, then get it remapped.

**SammoVWT** · 09-08-2016,07:44 PM

Really you would want to fit the turbo and have it mapped, then the tuner will be able to tell you if you are running too lean and dial it back to safe running levels, they will spool it up to this point if it is done properly - which is when you need to start looking at pumps, pressure regulators and injector flow rates & pressures.

You might not need bigger injectors depending on what sort of power gain you are looking for. Don't forget the more you add, the more stress you put parts under so increased servicing etc. So think of what you want first and then budget to that or you will end up throwing money away when you might not need to.

Fitting bigger injectors on a regular map will just mean the injectors will fire for shorter amounts of time within its control capability at least, and will be less likely to output their full capacity unless your ECU is really dynamic.

Personally I would do exhaust / intake / turbo > map > see where the land lies.

**MiniMental** · 09-08-2016,11:21 PM

I'm just curious, but define "intake" upgrade? Pre-turbo... Post turbo? Im not all that familiar with golf layout as I drive a b5.5 Passat but VW did a pretty decent job of setting up the air intake on it... Maybe the golf is different... I know people that stick cone filters on passats etc and it's a waste of time.... Just makes the intercooler less efficient as it draws air from a hot engine bay instead of a forced feed from the grille... Maybe I'm off on a tangent. Who knows... The hour is late and the eyelids heavy... Lol.

Mini

**AaronB9006** · 09-08-2016,11:24 PM

Yeah, ive done some research and a cone filter is what im looking at, looks like it does little to **** all in terms of performance, especially for the cost 1-200 squids, might give that one a miss..

**SammoVWT** · 09-08-2016,11:25 PM

A better flowing / larger intercooler, throttle bod, manifolds etc is what I would be thinking for a turbo. But the turbo will be doing the most work so probably a better inter-cooler, especially if its an uprated turbo with higher pressures. But you have to be pretty serious and on a plan to do all that work - depends if the rest can hold up to the wound up pressures also. Although for a diesel the butterfly is to stop it running away with itself.. so not sure on that one!

**AaronB9006** · 09-08-2016,11:27 PM

Im a serious guy, ive got the money, and the tools. Will let my mechanic mate at local VW do my turbo, but is an intercooler upgrade something i can delve into?