Fuel regulator or Milltek turbo back 1st?

[drennan]

i have the 4bar reg in the house but shud i fit it be4 i get the exhaust or what? anyone know? will it make a differance?
cheerz guys!

[KennyPOLO_Gti]

The 4 BAR FPR wont do much unless its been required in your map, like REVO stage 2 or if getting the hybrid setup. So I wouldnt bother as it wont make any difference at all mate unlike the Milltek!

[Gillen]

What difference does it make if the map, say the REVO stage 2, is adjusted to take into account the uprated fuel regulator?

[KennyPOLO_Gti]

Well REVO stage 2 requires a 4 Bar FPR where as APR dont. Just two different maps. Both maps make the same number in terms of BHP, just the way they wrote their maps. So putting a 4Bar FPR on a car that hasnt been mapped for it wont do anything.

[insanekiwi]

Go with Miltek First.

4 bar regulator will increase the fuel injection without having to change the injectors, I believe they can increase it by approximately 10%. So if your injector pumps out 290cc (I think our engines do), it will pump out around 320-330cc with the higher pressure regulator.

I finally have REVO Stage 2, and this is a lot more aggressive than APR Version 2. I personally haven't seen with APR Stage 2.

Now it holds boost above 21psi through higher REV range. Before it would peak at 23psi then come down to 18psi or so, but now it's always around 21-22psi. More fueling will obviously will aid with getting more power out. (this is not in terms of AFR, to make more power, you will be requiring more fuel, and you need in this case higher pressure regulator).

Hope this makes some sense...

[Gillen]

Thanks for that mate ^

What revs does your GTI hold boost until now?

[Turbomier]

normally they put the FPR in when the car is getting mapped.
otherwise it won't make any difference at all.
ECU decides how much fuel will be needed.
so if youre ecu is stock (not mapped) he will still provides the same amount of fuel to the engine.
but, once youre getting it mapped, a bit more Hp will be gained.

[drennan]

I have a 225bhp map..... so I've been told.... got it done by a guy i know at verve. but no milltek i knew it was a strong map going in but didnt realise 225 was the equivlent to a revo stage 2, and for a revo stage 2 an uprated exhaust and fuel regulator is required. so i've snaped up the 4bar reg on ebay whilst it was there but my question is do i wait untill i get my exhaust before installing it? or do it now?........make sense lol
cheers guys! for allowing me 2 confuse you

[Turbomier]

first of all, i find it hard to believe that you have 225Hp with only remap... i think the remap gives you 225Hp when you get milltek and 4bar FPR.
so if you have a map that is programmed with a FPR and exhaust you will have more advantage with those installed.
answer: Yes, you ECU is customized to work with a 4bar FPR so get it in as soon as you can

[insanekiwi]

I do not trust those figures that chip companies sell with.

Wheel dyno at 21 degrees warm spring weather - made 170hp at wheels with REVO Stage 1 + P160 intake only. (16" factory wheels)
Wheel dyno at 21 degrees warm spring weather - made 183hp at wheels with REVO Stage 1 + PD160 + K&N + ECS flywheel 14lb + 3" down pipe.
(this is a second run with heat soak, and no fan over intercooler). (17" RS4 replica wheels)

This is equivalent to 230hp at flywheel. (20% loss).
Reputable Dyno in New Zealand.

I believe the car now with REVO Stage 2 + Forge DV (with yellow springs) + Boost setting 8 + 4 bar fuel pressure regulator - around 245-250hp at flywheel. Wanting 200hp at wheels...

Front mount wheel help somewhat, but it never goes above 30 degrees.
Turbomier is correct is that you need ECU setting to utilise 4bar.