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Author Topic: 400 bhp +in GTI? What are the options?  (Read 14143 times)

Offline Kregiel

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400 bhp +in GTI? What are the options?
« on: February 04, 2012, 11:44:33 pm »
Hi Guys,

I've been thinking of going the well tested K04 route for GTI which will give ca 330 bhp. However if I wanted more power +400 bhp what are my options here? To safely run this sort of power I guess engine internals modifications are needed. What is required to have both reliability and longevity - forged rods, forged pistons?? What else?

Are there any tested ready to go upgrade kits out there with software?

CHeers
Paul
Red 2008 GTI, H&R ARB, b12 suspension, walk, milltek non-res full exhaust, forge IC, tarox 10 pot big brake kit, RS4 valve, Forge SSK, Autotech HPFP, Xenons, K04 Turbo, Quaife LSD, South Bend stage 3 Daily with SMF clutch, XB and UB Unibraces

Offline bacillus

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Re: 400 bhp +in GTI? What are the options?
« Reply #1 on: February 04, 2012, 11:50:22 pm »
Had a look at the APR stage 3 kit?
Not sure it'll make 400bhp with the new mapping but I suspect it should come close.
Without traction power is nothing!

Offline Hedge

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Re: 400 bhp +in GTI? What are the options?
« Reply #2 on: February 05, 2012, 12:06:31 am »
GT 3071 should be there or thereabouts but it will cost.  :scared:

Offline DanGB

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Re: 400 bhp +in GTI? What are the options?
« Reply #3 on: February 05, 2012, 12:12:05 am »
GT 3071 should be there or thereabouts but it will cost.  :scared:

The new mapping should make 400hp.

APR set a safe rod limit at 385hp.

Ive upgraded mine so can take advantage of more power with the newer mapping.
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Offline Poverty

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Re: 400 bhp +in GTI? What are the options?
« Reply #4 on: February 05, 2012, 12:18:41 am »
loba hybrid turbo makes 400hp

Offline dan930

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Re: 400 bhp +in GTI? What are the options?
« Reply #5 on: February 05, 2012, 12:59:01 am »
Won't that be a bit extreme as its fwd..


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Offline MAT ED30

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Re: 400 bhp +in GTI? What are the options?
« Reply #6 on: February 05, 2012, 12:59:58 am »
Won't that be a bit extreme as its fwd..

Without a diff yeah with one it will be fun

Mods yes but way too many to stick in this little box

Offline RobH

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Re: 400 bhp +in GTI? What are the options?
« Reply #7 on: February 05, 2012, 01:01:15 am »
Does a diff really make that much differance?

Offline MAT ED30

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Re: 400 bhp +in GTI? What are the options?
« Reply #8 on: February 05, 2012, 01:03:47 am »
Yeah wait until mike has his fitted and he will say why did I not do this first

Mods yes but way too many to stick in this little box

Offline Rich666

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Re: 400 bhp +in GTI? What are the options?
« Reply #9 on: February 05, 2012, 01:14:38 am »
GT3071r its a ball bearing turbo (£900) which helps spool up quicker, I've had these doing well over 400hp, you need internals , 650 injectors (750 if your not bothered about lumpy tick over and cutting out at traffic lights!), and a decent clutch, pad clutch if you want to go to morrisons shopping in it or a stacker clutch if you just want it to go! Gearbox will be good if it has a good LSD or 4WD or it will go sideways instead of forward.
Garrett also have a new range of turbo's, GTX3071 which is good for 550hp and well suited to 2.0l, you could drop compression (with pistons) run higher boost and run 100hp nitrous for cooling. That would give you about 600-650
Above 500hp and you probably want to consider 750 injectors, changing the fuel pump and fuel lines cos they cant keep up with the demand which will make it run lean and then it will go POP!! At power in excess of 500 you may get better power using a stand alone ecu for fuel/timing or a piggy back one doing same as you will probably be outside parameters of std ecu.
Dont forget the little bits n bobs that all add up - bearings, gaskets, ARP bolt kits, fuel regulator, fmic etc etc
There are other mods too such as maf, you will want bigger inlet pipework for air flow which means calibration of the maf or you could just run an RS4 maf and the tuner should be able to install 'software' in the ecu to tell it its running the rs4 maf, this is easier than recalibrating the std maf which takes time and time is money!
Oh and a bloody good tuner that knows what he's doing, none of that internet map crap stuff

If you get the power bug, Its a money pit once you start!

Offline Weston

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Re: 400 bhp +in GTI? What are the options?
« Reply #10 on: February 05, 2012, 01:55:55 am »
R32 turbo is the way  :happy2:
GTI going...

Offline Tfsi_Mike

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Re: 400 bhp +in GTI? What are the options?
« Reply #11 on: February 05, 2012, 04:59:48 am »

Offline gazon69

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Re: 400 bhp +in GTI? What are the options?
« Reply #12 on: February 05, 2012, 08:21:05 am »
Statllers golf is running well over 400hp on his golf k04 hybrid with water meth thrown into the mix. Give him  a tinkle and see what he can do for you. :happy2: having said that his is ed30

Offline DanGB

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Re: 400 bhp +in GTI? What are the options?
« Reply #13 on: February 05, 2012, 09:39:30 am »
Those cars running 400hp with hybrid turbos, are they BHZ or BWJ engines (k04 as standard), as they have a different compression ratio to the BWA engine (K03s as standard) meaning the timing can be pushed higher for extra hp.
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Offline DanGB

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Re: 400 bhp +in GTI? What are the options?
« Reply #14 on: February 05, 2012, 09:40:07 am »
Does a diff really make that much differance?

No it doesnt with 400hp.  :wink:
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