RS2 GT3071R perfomance box results

[A80Avant]

Done today some measurements finally with the perfomance box.

My car weighs 1699Kg on a full tank(measured back in Greece.)

I entered the weight to 1825kg today: car+me(85 fully clothed)+ Mary(better half 55kg fully clothed)+ 50lt of fuel tank which i took as 50kg for the ease of measurements).

I did several 2nd gear pulls for a power figure and averaged around 272kw( smaller was 269 and highest was 276).

As far as times are concerned i measured basically 80-120kms and 100-150kms on 3d gear and i also did 2 runs on 4th gear.The road on which the tests were done had about 2 meters total inclination from beggining to end,so some runs where done on slight downhill and some on slight uphill hence the differences on the power+accel.runs.However that incline is very mild anyway.

Here are the results:

Best 80-120km done in 3d gear: 2.7sec
Best 10-150Km done in 3d gear: 3.9sec done on the same run with downhill of -0,349m

3d GEAR PULLS:

1) 80-120 : 2.780sec on uphill dif: 0.059m
100-150 : 4.150sec on uphill dif: 0.422m

2) 80-120 : 3.070sec on uphill of 0.308m
100-150 : 4.800sec on uphill of 1.643m

+water injection
3) 80-120 : 2.800sec on uphill of 0.068m
100-150 : 4,110sec on uphill of 0.410m

+water injection
4) 80-120 : 2.880sec on downhill of -0.250m
100-150 : 4,230sec on downhill of -0.613m



4TH GEAR PULLS:

1) 80-120 : 4.5sec
100-150: 4.5sec (on the same pull)

2) 80-120 : 3.970sec on uphill of 0.311m
100-150: 4.510 on uphill of 0.118m

+water injection
3) 80-120 : 3.910sec on uphill of 0.302m
100-150 : 4,600sec on uphill of 0,100m


the highest power given was 276kw which i did on 3d gear on my last run with water injection and it was done on a 0.850m uphill.

All measurements of power are at the wheels.So :

taking the mean of 272kw x 1.36 = 369.92whp

according to the g-tech air drag calculator: @ 110km/h is 16.4hp

369+15.4=386.32whp

If i calculate the power on 15% losses that makes:444,268hp crank.
If the losses are 20% then: 463.584hp crank

these numbers would be adequate for me to be honest and there only one thing that remains to be done and that is to actually do use the losses feature on the PB to see how close the figures go,since the losses that it calculates are a mean of airdrag+drive terrain...

On 2nd gear car boosts to 1.8bar overboost and drops to 1.6bar
on 3d gear : 1.9bar overboost and 1.7bar steady to the red line

Happy with the results.If i get my hands on a g-tech i might be able to compare!!

[AUDIS2avant]

Holy crap that´s fast m8
Only upgraded the turbo?

[A80Avant]

noo a bunch of things..
IC,rods,pistons,downpipe,catback,cats,cyl head been serviced not ported.

i have an old project thread on the project forum

[AUDIS2avant]

Well not to much then, still think it´s good performance

[A80Avant]

well,pistons,rods and normal cyl.head are not the parts that will make the power,but those combined with a big turbo.
The GT3071R with 0.63AR has a max hp efficiency of 475hp and im making a bit short on that.SO i would say...pretty nice for that turbo!

[Ross]

Great results there Vas!

I'd certainly be happy with that performance, whp is amazing. Anyone have reliable figures on drivetrain losses? I've heard ~22% is realistic, which would put that right around 470hp

I'd be very interested to see how the car feels compared to my coupe did with the GT3071!

[A80Avant]

anytime ross! your coupe was the inspiration on most of us that went the 3071R route.That setup will still be on the car for another couple of years maybe,as my plans are to finish up with the Gt3076R at some point.But loving it so far!

[DJones]

Some good figures there, mighty satisfying isn't it..

[A80Avant]

yes indeed.
by the way,although i had previously measured 0.9G of accel on a 1st gear high rev release, the highest i saw on the readings today on normal 2nd gear acceleration was about 0.65G

[T2Andy]

Just to add i would deff say it feels well over 400bhp,from the seat of my pants
A massive relentless push in the back ,nice one vas its a right tool as they say !

[T2Andy]

That mk2 golf with the s2running gear\engine must be frightening with 450bhp.

[URSIMPO]

I thought the limit of a GT3071 with a .63 hotside was 440hp. Is it really good for 475hp?

[A80Avant]

i am not sure.However what i have heard is that garrett is always preservative in their announces of the power their turbos make.

Besides,fasterthanrs2 already made much more power with the 3071 at one time (although a dyno figure).

Here things that may give a false number of the power are a false weight input or a big downhill or uphill.This is why i did runs in both directions of the same road and produced a mean figure so that i would have it on uphill and downhill as well.

As for the weight,true,i didnt measure the car just before the runs,but as i have done it once,there are small diferences of + and - weights that i have taken into account the best i can.Best guess i may be +/- 5Kgs from the true weight

[EspenW]

yes indeed.
by the way,although i had previously measured 0.9G of accel on a 1st gear high rev release, the highest i saw on the readings today on normal 2nd gear acceleration was about 0.65G

I used to pull 0.67G in 2nd gear on 99 octane. I pulled 0.84G in 2nd on E85 on a sub zero day. Get it set up for alky. You know you need it...

[EspenW]

50l of fuel is approx. 37kg.
How did the car get to weigh 1700kg? Stock, it is supposed to weigh approx 1595, I think that DIN rating is with a full tank.