THOUGHTS: FITTING GT2871R to stock engine without mods.. Only revo stage 1...

[Dscott]

Guys,

I am speaking to as many people as possible about this and reading many forums.

Atp turbos built a bolt on GT2871R kit for our 1.8T Transverse engine - 'Turbo kit includes turbo and up-pipe along with 3" upper downpipe to merge GT2871R turbo to stock exhaust manifold. Also uses upper downpipe to merge GT turbo with downpipe made for stock K03 turbo'

My car currently as follows:

9n3 GTI 1.8T with Revo stage 1, no other supporting mods.


My questions are:

1) Will it run?

2) Like ****?

3) Other than limiting the potenial of the turbo, what are the chances with this setup i would cause engine/turbo problems, running 1bar boost or even stock boost..?

I would imagine i would need to upgrade to a better inline fuel pump and do all breathing mods, 3" dump pipe & silicone intake piping..

Feedback welcome. Some may ask why... Reason being, i am seeing members with around 140 FWKW with mods like exhaust/front mount + the rest... Which obviously would cost at least $2,000.

I strongly believe from what i've read and my own experiances, this engine is largely limited by its turbo... Why not replace it first?

Ultimately, i do plan to go full stage 3.. however, i just want to run the turbo safely on a some what cheaper setup for about 6 months.

D

[tommymac]

Will I run? Maybe but like poo

Would you need new injectors? Yes

Would the tune have to be different ? Yes

What would happen if I ran it on the revo stage one? Don't know much about these things but I assume the map you have is Kkk specific which would not run the new turbo properly.

Can an unopened motor take it ? They love it never heard of a revo tune putting a leg out of bed prob happens tho

At some point the stock ecu may become limiting but again I don't know as I run a standalone

[noone]

You really need a better tune to suit the turbo. As for everything else, well you will need to retune when you get all the other parts as well.

Be sure it will fit, 1.8 t trans is right, but is that for the Golf? The parts may not bolt straight up.

Interesting path, it's worth reading the BT build on the Uk Polo forum to see how it is best done.

With other stock parts you may be limited to 130-140. Talk to someone like Seb who does these sort of mods, he will point you in the right direction.

[Dscott]

Ya ill speak to Seb.

[vwthunder]

Have you dont things like suspension, brakes, clutch, remember the car has to handle and stop too

Also install of the turbo kit is $$$, different TIP, maybe different Maf too, injectors, you wont be able to use the standard airbox as well

[tommymac]

Welcome to adding big hp it's the little things that pull your pants down anal rape u

[Dscott]

Most definately.

Initially i am not looking to get the max out of the turbo. So i am wondering, if i dont upgrade injectors & maf and run 7 psi will it be ok?

D

[tommymac]

Neg a 71 running 7 psi is not equal to your kkk flowing 7 pounds. Really how long is a piece of spring mate but my bet is that you will end up with a car sitting in your drive waiting for 630 cc injectors

[Dscott]

Interesting.

[vwthunder]

I think you might need larger Turbo Inlet Pipe for the bigger turbo, which means you need larger maf, as the stock one probably wont connect to the Turbo Inlet Pipe, which also means you cant use the airbox

[tommymac]

The air box is a very minor hurdle you can make that fit no worries. First you need to bolt on your mani, turbo make cooler gear etc . Do it you know you want to

[Dscott]

I am gonna do it But... just getting the bare essentials first. And then get the rest slowly and then ultimately a stage 3 tune.

[parso_rex]

To take advantage of the bigger turbo you'll need a bigger MAF tube as the increased flow will max out the stock sensors in the factory tube quite easily. You'll also need the fuel system to support that and that means injectors 4bar FPR and a new pump. The bigger turbo means that the current wastegate duty cycle values set in the tune will need to be modifed to suit- Boost control will be useless without a remap of those maps
You could run the turbo though at a much lower peak boost using the stock MAF sensor in the stock size tube with an aftermarket boost controller. Its sort of pointless as it would be pretty laggy and you'd have to watch things all the time to make sure you weren't leaning thing out up top. You could do it though.
You need a front mount too that should be your first move the stock one sux hard and makes tuning these things hell. They are tiny. Even if you were to do this intially on the tune you have now I think you may notice a difference with summer coming on. The timing pulled due to inlet temps is pretty nasty
Sebs been playing with heaps of kits from various vendors and I think he'd know which one fits

[Dscott]

Thank you for your feedback, i do plan to upgrade the maf,injectors... however, i want to run the gt2871 for a few months before i can affford all the other parts..

I've also emailed Seb, ill get his thoughts too.

With regard to the FPR - According to Stage 3 tune (which i would ultimately get) i only need the stock FPR... maybe ill put a rising rate in temporarily?

D

[parso_rex]

If their tune uses the stock pressure then theres no need to go bigger. The 2871 isn't like some humongous beast. They just have the fuel maps done with X size/brand injectors at Y fuel pressure and if you change either of these then its stuffed so just go with what they use. Use the same injector size and brand to maintain dead time and latency values that they've used.