I5 GT Turbos 2871 / 3071 / 3076 / 3082 / 3582

[Sonic]

You mean a boost spike?

Thats the one

[A80Avant]

thanks for the link

i believe that this trim idea of garrett turbos is not very good to describe the turbine housings.
it is a fact that the bigger the turbine impeller(inducer/exducer) the bigger the lag,but the smaller the EGTs in general
so according to garrett,you may have a trim 60 turbine impeller and still have small dimentions(but big diference between inducer/exducer) and that will cause high EGTs anyway.
If they had the actual inducer/exducer dimentions available that would be more useful.

Also with their calculations,when they are describing for the turbine wheel one number : say 56mm. Which one do they mean? Inducer or exducer of the turbine impeller? so that way i can calculate according to their equations the other dimention?

EDIT: according to their equations,the turbine diameter they post,should be the turbine exducer(or big diameter).Makes sense as in the 3076R it adds up as turbine inducer/exducer: 54/60mm --->hence trim 60

[Rusty]

So if you ran a 3071 at 1.5 bar say and had it safely mapped to avoid surge then that'd play and give c.400 ponies. Does anyone do a chip for the ABY with 3071? IIRC 034 do a bolt on kit? Maybe Paul would sort something with suitable injectors, are RS2 injectors too small?

[Jamo]

The 034 chip is designed for stock rods and is a very tame tune, a few have used it on this forum and have not been impressed.

Brams map is perfect for a stock setup IMO as the boost spike will only happen with a more aggressive boost target.

Ross said on the road he never got a spike only on the RR.

[A80Avant]

i wont think that a 3071 with 1.5bar will make 400hp.
i have already posted my graphs with the PB doing 1.9 and 1.65bar to the red line and bearely making 430hp on a 4th gear pull.I doubt that 1.5bar would get you only 30hp less.(of course in the redline it could but i think it will be much less)

when i get the VEMS here i may go through that boost area whilst tuning it so i may be able to tell you what a 3071 will make.

[Rusty]

Stock rods & clutch would be ideal to start then get it all pimped at a later date with rods, balance and full remap.

[Rusty]

I'm not overly bothered about initial power figures, it's more about getting the parts on and running with as much stock stuff as possible before getting it fully pimped at a later date. Saves going RS2 in the meantime. An off the shelf chip would be nice, even if it'r a bit of an unrealistic hope...

[Bram]

That's one of the best 3071r dyno plots I've seen, if your saying you have 368 at the wheels it equates to 450-460 at the crank.

There's more to be had as you can run 1.9 to 2.0 bar max and then run 1.7 to redline

Yes, the Superflow rolling road measured 368 real HP at the wheels. After rolling they calculated the crank HP, which we already discussed in my project topic, so should be a bit higher like you mentioned Jamo. 450 HP sounds like a happy number to me

This year I will try to push the turbo to max efficiency numbers.

[A80Avant]

im going to play it safe with mine,as i plan to go bigger next year,so my kit will be up for sale sometime next summer...

[Bram]

im going to play it safe with mine,as i plan to go bigger next year,so my kit will be up for sale sometime next summer...

368 HP at the wheels is for the moment more then enough for me on my daily driver slipper wagon

I looks much more forward to that extra 130Nm of torque once we map for 2.0 bar. If I recall correctly somebody here on the forum mentioned he mapped the GT3071R 0.63AR at 2.0 bar and it hit 645Nm

My H-beam rods say and I hope it will scare me

[fasterthenrs2]

I think I have had almoust all of them
1. Gt 2871 awesome spool up, with stock AAN engine IA stage 5 chip rs2 EM aan IM 312WHP 330wtq @25psi pump gas
2. GT3071 still no lag, build 7A, same set up as before, rs2 EM aan IM, now on a 034 Iic 100octane @35psi 463WTQ 436WHP pump gas 367WHP 340WTQ @ 24psi
3. GT35r still with build 7A, 034 EM tubular AAN IM 420WHP 395WTQ pump gas @24 psi, C16 race gas 32psi 512WHP 440WTQ

[Rusty]

Those are some big numbers! 512wbhp!

[Bram]

WHP = Wish HP

No offence FasterthenRS2; Your Coupe is frightening fast without a doubt.
What I have seen from 034MS and Motorgeek measurements/statements all these US RR results can not be compared to our Euro DIN BHP numbers.

[Rusty]

Wish or not, it'r still more than I'll ever have

[Bram]

Wish or not, it'r still more than I'll ever have

True, true. My comment was only focussing on this topic on how turbos can be compared, and I doubt his numbers are representative for our comparison here. I have nothing personal against fasterthenRS2 or his monster-turbo engine setup. I have seen pics of his car with twisted drive axles