4g93 turbo choice

[Qik-1.8]

Hey guys

just need some help in choosing a turbo for my 1.8ltr
my brain is rattled atm

im chasing 350hp at the wheels
the engine is forged with following
im looking at running 20psi but want more if needed


arias pistons
par rods
acl race bearings
Tighe custom cam sharfts
Ported and polished

regards

 

[CLuTZ]

GT3076R, with a V-band .63 A/R would be my choice.

 

[GSRWRC]

Hey guys

just need some help in choosing a turbo for my 1.8ltr
my brain is rattled atm

im chasing 350hp at the wheels
the engine is forged with following
im looking at running 20psi but want more if needed


arias pistons
par rods
acl race bearings
Tighe custom cam sharfts
Ported and polished

regards

You'll probably need more boost than that if you want that sort of power from a turbo that'll be remotely streetable on a 4G93T. I'm expecting around 325whp from my TD06-SL2 20G at 22-24psi. Something FP Green sized could do the trick. Budget plays a big part too, you could rush out and spend big $$ on an FP DSM76 HTA if you had the cash.

 

[EVOCPE]

GT3071R, with a V-band .82 A/R

 

[Qik-1.8]

I have been leaning towards the 30-71r.
Should i run a external gate??
I dont want to be to laggy for the street. But in saying i want boost to come on hard
Also im running gsr drive line too

 

[Qik-1.8]

Anyone else have a turbo they think i should run or even advice

 

[youda]

with some 272's on the motor a tdo5 20g running 22psi should be right on the mark, full boost at approx 4000rpm. i would look at a ball bearing equiv for an earlier spool up time.

 

[Smutt]

I have attached some compressor maps for comparison purposes only - for use with a 1.8ltr.

Thanks to squirrel performance website for the maps and plots.
There are quite a few variables that are to be entered that change the plotted line on the compressor map/s.
Some of the variables used were: Engine size 1.8ltrs, Target A/F 11:1, BSFC 0.47, Engine redline 7400, Peak Power at 7200, Pressure reference of 14.65

Turbo's compared: TD05-16G Big, GT2871R, GT2876R, GT3071R & GT3076R

Target Engine HP 460 and 480
HP loss through AWD = 17% - 25%
gives 345 - 381 HPATW (460 Engine)
gives 360 - 398 HPATW (480 Engine)

GT3071R & GT3076R maps next post.. (size limits)

 

[Smutt]

GT3071R & GT3076R maps attached...

 

[3zercrowd]

Nice work on the maps, however the 2 16gs (TD05HR)are the reverse type used from the Evo4 onwards

 

[Qik-1.8]

looks like runnign the gt30-71r is my choice but will i need a external wastegate

 

[GSRWRC]

You can get an internally wastegated GT3071R with 0.64 A/R turbine housing: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3071R_700382_3.htm

The GTX3071R would be well worth considering too: http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GTX3071R_803712_1.htm

 

[Smutt]

Nice work on the maps, however the 2 16gs (TD05HR)are the reverse type used from the Evo4 onwards

Cool, yeah I had wondered which model it came off... It is a very very good responsive map that can push high boost (IMO)... just make it work lol..

looks like runnign the gt30-71r is my choice but will i need a external wastegate

Need an external gate...?? My GT3071R is internally gated.. You can get 4 different compressor covers and 4 different turbine housings

http://www.procharge.com.au/performance-turbochargers/garrett-gt3071r-t28

 

[Qik-1.8]

There are 2 gt30-71r on the garrett site. Im looking at sam
but im tossing off weather to run a external wastegate,

 

[Dean]

There are 2 gt30-71r on the garrett site. Im looking at sam
but im tossing off weather to run a external wastegate,

sorry grant, but LOLL

 

[Smutt]

Get the one that suits your current manifold if possible.

Some have issues with controlling/ or achieving high boost with an internal gate, depends on your actuator spring and boost controller.

I dont have any problems with 12lb spring and Eboost 1, but i would choose a higher one if i had the choice again .. i wouldnt recommend going lower than 12psi spring..

You can get a 24psi actuator for a GT2871R (internal gate) set up..
you might need to make up a custom actuator depending on your configuration, i had to with mine (easy, buy the parts, dummy fit, weld actuator rod n elbow section together and bolt up)..

 

[Smutt]

I took a video yesterday of 3rd gear winding into boost, 3rd gear only and captured the boost gauge and rpm..

Running GT3071R with 0.64 A/R Turbine

I have played it over and paused to view the boost levels at the following RPM values;

Psi RPM

5 @ 3500

10 @ 4000

15 @ 4200

20 @ 4600

25 @ 5000

27.5 @ 5100

30 @ 5500


As you can see the boost climbs very fast, especially in third, acceleration is quick.


Keep in mind Im running a 1.8ltr, standard cams, reduced compression ratio (8.0:1) and running E85 which can reduce boost response because of the less heat generated (unless tuner dials in more timing before boost)..


Has anyone else got similar results using different turbo's both 1.8 and 2.0?

 

[Qik-1.8]

Thanks sam make sure to send the vid through email

 

[trippy]

hey Grant i just ordered a GTX3076 with a .82 housing all v clamped 6boost dual wastegates and twin scroll manifold for my evo 9 all my research and set ups over the years on my many different cars this sounds to be the best to date . i will be selling my FPV green Turbo that im running soon if your keen

 

[Qik-1.8]

hey mick and specs on that turbo i already have a 6boost manifold made up with a t28 flange