Project - S13 Awesomeness

DriftZ · Post by **DriftZ** » Wed Mar 03, 2010 7:02 pm

WHAT?! turbo broken.. for real? did it come with the motor?

I need a GT30.. maybe we can do a group buy

ljS14 · Post by **ljS14** » Thu Mar 04, 2010 9:26 am

This is a tough choice for me as i have had a 30 and 35 , I loved the boosting from 2800rpm of the gt30 but we are all the same and you will want more eventually so the gt35 would be my choice for you ,Spool up from 3000rpm or so and full boost at about 5500rpm .If you only want road usage and not more then 450hp then the gt30 is great

The price difference is small

Im sure you have heard this all before but get what the application ( daily/track etc ) is needed .

rat · Post by **rat** » Thu Mar 04, 2010 9:40 am

ljS14 wrote:This is a tough choice for me as i have had a 30 and 35 , I loved the boosting from 2800rpm of the gt30 but we are all the same and you will want more eventually so the gt35 would be my choice for you ,Spool up from 3000rpm or so and full boost at about 5500rpm .If you only want road usage and not more then 450hp then the gt30 is great
The price difference is small

Im sure you have heard this all before but get what the application ( daily/track etc ) is needed .

what boost you doing to only get full boost by 5500rpm?

RB25SX · Post by **RB25SX** » Thu Mar 04, 2010 9:48 am

GT35R with .63A/R T3 will give u very little lag and great potebtial for more power. Much cheaper to buy a bigger exhaust housing if needed than a bigger turbo.

ljS14 · Post by **ljS14** » Thu Mar 04, 2010 10:46 am

rat wrote:
ljS14 wrote:This is a tough choice for me as i have had a 30 and 35 , I loved the boosting from 2800rpm of the gt30 but we are all the same and you will want more eventually so the gt35 would be my choice for you ,Spool up from 3000rpm or so and full boost at about 5500rpm .If you only want road usage and not more then 450hp then the gt30 is great
The price difference is small

Im sure you have heard this all before but get what the application ( daily/track etc ) is needed .
what boost you doing to only get full boost by 5500rpm?

If i set the the boost to 2.0 bar by mistake like i did on the way back from Saldahna it reached 2 bar at 5500-6000 rpm

things were happening a little quickly to be 100% accurate

@ 1 bar its full boost there i know for sure

rat · Post by **rat** » Thu Mar 04, 2010 11:32 am

I want full boost from 4000rpm can this be done on a gt35?

Only going to be running about 1bar maybe 1.2

RBSX · Post by **RBSX** » Thu Mar 04, 2010 5:42 pm

this just got very interesting, i was hoping you would change the turbo
so i can have an even better match to my setup

gona be one sweet RB25 setup

Whats those Gt3/35 go for

rat · Post by **rat** » Fri Mar 05, 2010 7:50 am

RBSX wrote:this just got very interesting, i was hoping you would change the turbo
so i can have an even better match to my setup

gona be one sweet RB25 setup

Whats those Gt3/35 go for

my power has just gone up R13500 - R15500

DriftZ · Post by **DriftZ** » Fri Mar 05, 2010 7:59 am

get ready Donny

RB25SX · Post by **RB25SX** » Fri Mar 05, 2010 8:15 am

Shane's GT35R has a .82 A/R T3, wich will give it more lag, .63 A/R will give u what u want. I had a T3 .63 A/R on a T66 on RB25, reached 0.7 bar at 3700 rpm, wich it was running at the time (265kw), GT35R has a better spool up, and smaller (T61 size) wheel.
As per dyno print, the lower flat torque curve was with T66 T3 .63 A/R.(RB25) Gave a very nice broad torque curve, very little lag for the size of the turbo. (that was the nicest turbo combo i ever had on a RB25

)

rat · Post by **rat** » Fri Mar 05, 2010 10:34 am

RB25SX wrote:Shane's GT35R has a .82 A/R T3, wich will give it more lag, .63 A/R will give u what u want. I had a T3 .63 A/R on a T66 on RB25, reached 0.7 bar at 3700 rpm, wich it was running at the time (265kw), GT35R has a better spool up, and smaller (T61 size) wheel.
As per dyno print, the lower flat torque curve was with T66 T3 .63 A/R.(RB25) Gave a very nice broad torque curve, very little lag for the size of the turbo. (that was the nicest turbo combo i ever had on a RB25 )

Looks like GT35 with a 0.63 is the way to go. What size wastegate were you riunning to keep the boost under 1bar?

RB25SX · Post by **RB25SX** » Fri Mar 05, 2010 10:44 am

On the RB25, 50mm wastegate, on the RB30, 60mm. Had a 38mm turbonetics on first, but boost would creep very bad towards the top end.

Gary57 · Post by **Gary57** » Fri Mar 05, 2010 11:08 am

@RB25SX, what rpm do you think the GT35 with AR63 housing could reach 1bar?? And when in boost what lag would you have when changing gears??

RB25SX · Post by **RB25SX** » Fri Mar 05, 2010 2:39 pm

Gary57 wrote:@RB25SX, what rpm do you think the GT35 with AR63 housing could reach 1bar?? And when in boost what lag would you have when changing gears??

Cant say what rpm, but my experience with differant turbos, i think that will give u the best responce and the most in reserve for future upgrades. U should have almost no lag between gears with that turbo. Garret B/B turbo's are very good, spool fast and make great power.
I have learnt with turbo's to decide what u want, pick the turbo that will work best........ and then buy one size bigger. If u want 450hp, a GT3071R is great (rated to 480hp) but u are close to the max of the turbo. GT3582R (rated 600hp) with the right size exh housing might give u 200-500 rpm more lag, at the expence of 120hp extra. Price differance is so little that if u buy a new Garret turbo, make sure u buy with a little bit in reserve. Just my 2c

RBSX · Post by **RBSX** » Fri Mar 05, 2010 5:03 pm

13-15k yoh thats alot
i got a mr turbo t72 sells for R5500 i think

so is it really worth that 10k extra

i mean you could sure get a mr turbo t66 for that Rb and still have change for new injectors