First golf gti

[W6llace]

Picked up my first golf gti today 55 plate and I'm very pleased so far , but going to remap it as I feel it needs more punch was going to AMD they say can take it to 265 bhp anyone else had their gti remapped by them? If so was you happy with the outcome ?

[th3_f15t]

I run an AmD Tuning custom remap with 265bhp, but I have additional modifications to get that power. They are;

Milltek cat-back stainless steel exhaust
Panel filter (K&N)
GFB DV+ diverter valve upgrade

My girlfriend has almost identical mods but only gets 259bhp, which I like reminding her about. The power gain varies with everyengine, my advice is expect 230bhp with just a map and up to 250bhp with mods then you won't be disappointed.

The AmD map, for me, has been perfect for nearly a year and 8000 miles. They have gotten better in recent times, and they're customer service is pretty good.

[th3_f15t]

Also, check out the guides on here for checking the PCV (pressure control valve) and high pressure fuel pump (HPFP) can follower. AmD do scan the ECU for faults and check the car over, but they're worth checking yourself ASAP.

Sometimes a GTI has a broken diverter valve which puts then seriously down on power, so before a remap check that too, plenty of info if you use the search feature.

[Matthewsimone]

Also, check out the guides on here for checking the PCV (pressure control valve) and high pressure fuel pump (HPFP) can follower. AmD do scan the ECU for faults and check the car over, but they're worth checking yourself ASAP.

Sometimes a GTI has a broken diverter valve which puts then seriously down on power, so before a remap check that too, plenty of info if you use the search feature.

Very good advice about Diverter valve my car felt sluggish so checked the Dv and rubber diaphram was ripped badly, £42 to replace and its like a different car afterwards
No Remap needed on them but thats just my oppinion, 200bhp is more than enough on a fwd car especially wit no fancy Differential to help out on them either!

[th3_f15t]

An estimate of power loss is about 30bhp and similar tourque loss so well worth checking. I got lucky with mine...

[W6llace]

I've done my home work on the gti , I've been in the motor trade for 21 years and I am a fully qualified mercedes-benz technician, so I know my way around cars and this forum has been a great help already.
I've already brought cambelt kit and water pump doing that in the week and also the cam follower for the fuel pump , been reluctant to use the car at the moment until I've done these little jobs then I will set about doing the other bits ,like the diverter valve and PVC valve plus a full service also has outstanding recall on the coil packs which is a result .

[W6llace]

Sorry text mistake pcv valve

[Andy]

also on the early gti--they suffered from noisy cam chains and warn followers

[th3_f15t]

Being a mechanic you'll have no issues then. Space is a bit tight for the DV on a K03 engine but you'll probably be lucky enough to have a ramp... Lucky... Where about in Essex or Kent do you hale from then? There's usually a regular monthly meet at Lakeside with a load of us from this forum.

[W6llace]

I live in Dartford and work at mercedes-benz lakeside

[GrayMK5GTI]

265bhp from that setup  isn't possible matey 
A realistic 240bhp from that setup car is what you can expect. The cat back exhaust doesn't add much power, although the panel filter will give around 5bhp.

AMD's dyno has been known to be generous, a guy (TomGTI maybe) had an AMD map and dyno run and went away with 260bhp, then he went to JKM dyno day and got 240bhp.

See here for examples of what to expect on proven accurate dyno's:

http://www.mk5golfgti.co.uk/forum/index.php/topic,16977.msg630043.html#msg630043

http://www.jkm.org.uk/performance/GalleryMK5GTI161010.htm

[th3_f15t]

I have heard the same things, I need to find what dyno AmD use. I'll try and verify my power somewhere reliable one day soon.

[GrayMK5GTI]

I have heard the same things, I need to find what dyno AmD use. I'll try and verify my power somewhere reliable one day soon.

Try a Dynodynamics dyno, they are typically accurate. Surrey Rolling road & JKM in Portsmouth have one 

[th3_f15t]

When you add up the advertised power gains that manufacturers claim their products make, plus a remap;

Remap 40bhp
Exhaust 10bhp
Panel filter 3bhp
Original power 197bhp

Its why I say with a stage 1 package expect 250bhp. Don't think I'm being unrealistic, and did see someone recently on here who put the AmD figures to the test and got a good, close (but not matching) set of figures. But I can't defend my claims as I have no evidence so happy to accept the consensus.

For now...

[alexharvey]

my 05 GTI made 247 bhp and 307 ft ilbs torques with rtech linear tiv map!

no other mods

would have been 270 bhp on amd rollers