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Author Topic: Mk4 golf gti turbo  (Read 2565 times)

Offline Chris gtiturbo

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Mk4 golf gti turbo
« on: 23 December 2013, 10:46 »
Hi all new to this first post !! Well I have a mk4 golf gti turbo (arz) with a turbo back exhaust system + cat, and air filter and 340lph fuel pump on at the moment and soon to fitted ko3s turbo n front mount intercooler, I'm also after getting a 3" maf housing,4 bar fuel regulator, 440cc injectors, stainless steel manifold then finally get it remapped what bhp would I be ruffly running at with all this??? Also brakes n clutch will be uprated too!!! Thanks Chris!!
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Offline Nino

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Re: Mk4 golf gti turbo
« Reply #1 on: 23 December 2013, 10:55 »
You should see 240+ but I would strongly recommend you change your boost pipes, and do a n249 bypass
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Offline Chris gtiturbo

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Re: Mk4 golf gti turbo
« Reply #2 on: 23 December 2013, 11:04 »
Not sounding stupid or owt but wats a n249 bypass???
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Offline Chris gtiturbo

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Re: Mk4 golf gti turbo
« Reply #3 on: 23 December 2013, 11:48 »
Found it lol
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Offline mcgee9t2

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Re: Mk4 golf gti turbo
« Reply #4 on: 23 December 2013, 12:31 »
personally i wouldnt bother with the 4bar fuel regulator. etc. not needed untill you get over 250 bhp.

mate of mine had one in his ibiza cupra, made the car over fuel so much that it now has 3.5 pistons and is being broken...
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Offline Chris gtiturbo

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Re: Mk4 golf gti turbo
« Reply #5 on: 23 December 2013, 12:57 »
Was hoping what I were putting on would get me to that bhp (250/260) but not sure how much the k03s can be pushed?
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Offline dom

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Re: Mk4 golf gti turbo
« Reply #6 on: 23 December 2013, 13:05 »
The KO3s limit is about 240bhp, R-Tech can push them to 250-260bhp but you need WMI, ported exhaust manifold etc. etc.

For 240bhp don't bother with injectors/MAF/4bar FPR. Add to your list a Forge 007p/008p or new stock diverter valve, a decent set of boost hoses and a decent TIP (not a cheap eBay one).

What size intercooler pipework will you be running? What size downpipe? I'd also ditch the cat or make sure it's at least a decent sports cat.

You also need a decent air intake setup.

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Offline Chris gtiturbo

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Re: Mk4 golf gti turbo
« Reply #7 on: 23 December 2013, 13:16 »
Just stock cat thought about putting straight pipe in too, n intercooler piping is 2.5" n iv got a 3"turbo down pipe, iv got kn panel filter which I'm gunna swap for a decent cone filter set up!
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Offline dom

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Re: Mk4 golf gti turbo
« Reply #8 on: 23 December 2013, 13:22 »
Quote from: Chris gtiturbo on 23 December 2013, 13:16
Just stock cat thought about putting straight pipe in too, n intercooler piping is 2.5" n iv got a 3"turbo down pipe, iv got kn panel filter which I'm gunna swap for a decent cone filter set up!

It's pointless running the stock cat after a 3" downpipe, it's way too restrictive. You'll also struggle joining them, 2.25" - 3" is a massive jump.

R-tech sell their own intake setup for just over £100, but a lot of people on here including myself are running a Honda S2000 cone filter.
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Offline Chris gtiturbo

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Re: Mk4 golf gti turbo
« Reply #9 on: 23 December 2013, 13:33 »
Just had exhaust done about 2 weeks ago from powerflow they insisted I kept my cat in!!! New I should have told them to take it out!! Have to go back n get them to do me a decat pipe! N y the honda air filter??
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