30r or 35r That is the question

st0k3d · 02-08-2006, 11:09 AM

im getting ready to order my perrin rotated kit to replace my PE1820 turbo

Supporting mods are obviously 3 inch exhaust, stock headers, 850cc injectors, fuel pump, ecutek, blitz sbc id boost controller... etc etc

the 1820 is a great street turbo etc etc BUT all the local guys in my car club are going big and its came time to do the same

what i want is a car that is capable of doing mid 11's (11.5-11.6)... right now best i could get out of the 1820 was 12.2-12.3.... this car is also gonna be a daily driver... the car is down getting a stage 2 motor put int (forged pistons) right now...

i want the car to be a street monster, so thats why im iffy to go wtih the 35r... but i feel maybe the .82 A/R 30R would be what i want but i dunno if it will give me the power i need

what do you guys think big 30r or small 35r?.... i want as little lag as possible, but still big enough to get me the 1/4 mile numbers i want

I will run alcohol injection to get the times i need

please advise

Adam

XxSCAxX · 02-08-2006, 01:28 PM

id say the GT30R.

jays05 · 02-08-2006, 01:37 PM

I vote for the .82 A/R GT30R. I'll be ordering mine in a couple weeks

There's a thread on nasioc where one made 410whp on 92 octane and 480whp on C16, that is incredible for a turbo that gives near-stock boost response.

Allen504tke · 02-08-2006, 01:51 PM

Whether you want it spool fast or spool slow, it doesn't matter... for they both provide the 'go'

mllrsti · 02-08-2006, 01:52 PM

^Sounds good. Up to you.... 35R w .82 A/R is nice as well, especially on the 2.65 liter. WI is definatley a plus with either. 30R will give you faster spool if that is what you're looking for. Times wise, they will both get you where you want to be.

**forgedSTi** · 02-08-2006, 02:00 PM

i think most will say go with the 30R for the ultimate street setup and I tend to agree. However, I bought the 35R kit as I want to eventually forge the internals, do head work, and balance the motor to spin up to 8500 RPMs. The GT35R will be perfect for that application, imo.

Here she is, gone at the moment for some coating and porting at Crucial.

IMG_1227.JPG

mllrsti · 02-08-2006, 02:03 PM

Not to hijack thread but........ForgedSTI GREAT CALL on plans in store for your 35R!

burnin4 · 02-08-2006, 06:11 PM

I would go with the GT35R, without a doubt. I've put 2000 miles on my setup and love it. lag is WAAAAYYYYY overrated. The 2.5motor has enough torque down low, and when the gt35r hits it's knarly. dont get me wrong, the gt30 is a great turbo, but go all the way if you're gonna do rotated mount. If not, go with a sz55. Either way you go, methanol is your friend, i picked up 90whp/100tq on pump/meth. good luck, let us know what you end up doing.

ride_the_pony69 · 02-08-2006, 10:22 PM

Quote:

Originally Posted by jaygoesfast

I vote for the .82 A/R GT30R. I'll be ordering mine in a couple weeks

There's a thread on nasioc where one made 410whp on 92 octane and 480whp on C16, that is incredible for a turbo that gives near-stock boost response.

Can't you get that from a FP Green?

***Ross*** · 02-08-2006, 11:41 PM

Quote:

Originally Posted by ride_the_pony69

Can't you get that from a FP Green?

With a very aggressive tune it is possible, depending on other mods.

st0k3d · 02-08-2006, 11:47 PM

mmm its such a tough decision... i wanna go ahead and be badass and get the 35r if not for bragging rights alone... but a feeling inside of me tells me 30r is the right turbo for my application...

i wish i could get a ride in both back to back to decide... hows the top end in the 35 vs the 30?... these cars suck on the highway so anything would help... obviously the 35 will pull better on the highway but HOW much better (how many cars would the 35 pull on the 30 car?)

this would be on pump/alcohol

to the guys saying a green can do those numbers... ive done the stock mount crap... and a loose turbo inlet cost me my motor... which is uncommon and my fault, but still did... i feel the stock mount setup is an inferior design to a rotated setup...

mllrsti · 02-09-2006, 12:49 AM

RED or SZ55 are pretty insane ........... My buddy has the 35R on his STI. It feels pretty good on the highway (400whp). Streetwise, I don't care for it. Up to you on what you want the car for.

Boxer · 02-09-2006, 07:06 AM

Quote:

Originally Posted by mllrsti

RED or SZ55 are pretty insane ........... My buddy has the 35R on his STI. It feels pretty good on the highway (400whp). Streetwise, I don't care for it. Up to you on what you want the car for.

Isn' the "highway" part of the street?

st0k3d · 02-09-2006, 08:04 AM

Quote:

Originally Posted by Boxer

Isn' the "highway" part of the street?

i know what he means, highway is a little different than your basic light to light stuff...

st0k3d · 02-09-2006, 08:06 AM

Quote:

Originally Posted by mllrsti

RED or SZ55 are pretty insane ........... My buddy has the 35R on his STI. It feels pretty good on the highway (400whp). Streetwise, I don't care for it. Up to you on what you want the car for.

my boss has a red on his sti, and ive been in a SZ55 car... its nice, but i wanna go rotated mount, i like the wastegate config, the dual ball bearing GT Series turbo's, and the fact that there isnt air running through a turbo inlet under the manifold etc etc.... and the cost isnt bad at all

02-08-2006, 11:09 AM	#1
st0k3d Junior STI Driver Car: 04 WRX STI PSM Fav Mod: PE1820 or Tein Flex's Location: Long Island, NY Posts: 124 IWSTI Addict since: Oct 2005 Trader Rating: (0)	30r or 35r That is the question im getting ready to order my perrin rotated kit to replace my PE1820 turbo Supporting mods are obviously 3 inch exhaust, stock headers, 850cc injectors, fuel pump, ecutek, blitz sbc id boost controller... etc etc the 1820 is a great street turbo etc etc BUT all the local guys in my car club are going big and its came time to do the same what i want is a car that is capable of doing mid 11's (11.5-11.6)... right now best i could get out of the 1820 was 12.2-12.3.... this car is also gonna be a daily driver... the car is down getting a stage 2 motor put int (forged pistons) right now... i want the car to be a street monster, so thats why im iffy to go wtih the 35r... but i feel maybe the .82 A/R 30R would be what i want but i dunno if it will give me the power i need what do you guys think big 30r or small 35r?.... i want as little lag as possible, but still big enough to get me the 1/4 mile numbers i want I will run alcohol injection to get the times i need please advise Adam This ad is not endorsed by this member. Please register or login to hide this ad. Last edited by st0k3d; 02-08-2006 at 12:28 PM.

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02-08-2006, 01:28 PM	#2
XxSCAxX Spec C Club Car: 05 AW 30r STi Fav Mod: Perrin 30r Kit Location: Campbell Hall, NY Posts: 1,565 IWSTI Addict since: Apr 2005 Trader Rating: (5)	id say the GT30R.

02-08-2006, 01:37 PM	#3
jays05 Spec C Club Car: Blue 05 STI Fav Mod: 4th gear wheelspin Location: Upstate NY Posts: 2,095 IWSTI Addict since: Nov 2004 Trader Rating: (0)	I vote for the .82 A/R GT30R. I'll be ordering mine in a couple weeks There's a thread on nasioc where one made 410whp on 92 octane and 480whp on C16, that is incredible for a turbo that gives near-stock boost response.

02-08-2006, 01:51 PM	#4
Allen504tke Spec C Club Car: 05 AW STi on Gold Fav Mod: JDM Pink Struts Location: Jersey Posts: 2,378 IWSTI Addict since: Jul 2005 Trader Rating: (2)	Whether you want it spool fast or spool slow, it doesn't matter... for they both provide the 'go'

02-08-2006, 01:52 PM	#5
mllrsti Professional STI Racer Posts: 719 IWSTI Addict since: Dec 2004 Trader Rating: (0)	^Sounds good. Up to you.... 35R w .82 A/R is nice as well, especially on the 2.65 liter. WI is definatley a plus with either. 30R will give you faster spool if that is what you're looking for. Times wise, they will both get you where you want to be.

02-08-2006, 02:00 PM	#6
forgedSTi all bOOst Car: 05 STi, 08 M3 (E92) Fav Mod: dual catch high performance pcv system Location: in front of you. ;) Posts: 1,315 IWSTI Addict since: Jun 2005 Trader Rating: (4)	i think most will say go with the 30R for the ultimate street setup and I tend to agree. However, I bought the 35R kit as I want to eventually forge the internals, do head work, and balance the motor to spin up to 8500 RPMs. The GT35R will be perfect for that application, imo. Here she is, gone at the moment for some coating and porting at Crucial. IMG_1227.JPG

02-08-2006, 02:03 PM	#7
mllrsti Professional STI Racer Posts: 719 IWSTI Addict since: Dec 2004 Trader Rating: (0)	Not to hijack thread but........ForgedSTI GREAT CALL on plans in store for your 35R!

02-08-2006, 06:11 PM	#8
burnin4 Spec C Club Car: 10 sec STi, 08 Z06 Fav Mod: TopSpeed Posts: 1,010 IWSTI Addict since: Aug 2004 Trader Rating: (3)	I would go with the GT35R, without a doubt. I've put 2000 miles on my setup and love it. lag is WAAAAYYYYY overrated. The 2.5motor has enough torque down low, and when the gt35r hits it's knarly. dont get me wrong, the gt30 is a great turbo, but go all the way if you're gonna do rotated mount. If not, go with a sz55. Either way you go, methanol is your friend, i picked up 90whp/100tq on pump/meth. good luck, let us know what you end up doing.

02-08-2006, 11:47 PM	#11
st0k3d Junior STI Driver Car: 04 WRX STI PSM Fav Mod: PE1820 or Tein Flex's Location: Long Island, NY Posts: 124 IWSTI Addict since: Oct 2005 Trader Rating: (0)	mmm its such a tough decision... i wanna go ahead and be badass and get the 35r if not for bragging rights alone... but a feeling inside of me tells me 30r is the right turbo for my application... i wish i could get a ride in both back to back to decide... hows the top end in the 35 vs the 30?... these cars suck on the highway so anything would help... obviously the 35 will pull better on the highway but HOW much better (how many cars would the 35 pull on the 30 car?) this would be on pump/alcohol to the guys saying a green can do those numbers... ive done the stock mount crap... and a loose turbo inlet cost me my motor... which is uncommon and my fault, but still did... i feel the stock mount setup is an inferior design to a rotated setup...

02-09-2006, 12:49 AM	#12
mllrsti Professional STI Racer Posts: 719 IWSTI Addict since: Dec 2004 Trader Rating: (0)	RED or SZ55 are pretty insane ........... My buddy has the 35R on his STI. It feels pretty good on the highway (400whp). Streetwise, I don't care for it. Up to you on what you want the car for.