Welcome to the North American Subaru Impreza Owners Club Friday August 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 12-10-2002, 09:03 PM   #1
Szm426
Scooby Newbie
 
Member#: 11679
Join Date: Oct 2001
Location: Chi-Town
Default Fast 2.5 rs N.A?!

hello, im thinking i might stick to na. So are tehre any build fast na 2.5rs's? What mods would i have to do to get a fast as hell na 2.5 rs. Able to smoke alot of cars? Thanks
* Registered users of the site do not see these ads.
Szm426 is offline   Reply With Quote
Old 12-10-2002, 10:06 PM   #2
nate49509
Scooby Guru
 
Member#: 22452
Join Date: Aug 2002
Chapter/Region: MWSOC
Location: Not Flint.
Vehicle:
'04 WRX
witty comment goes here

Default

Sounds like you need naaaawsssss.
nate49509 is offline   Reply With Quote
Old 12-10-2002, 10:37 PM   #3
rhdude
Scooby Guru
 
Member#: 6637
Join Date: May 2001
Chapter/Region: MAIC
Location: Manassas
Vehicle:
2009 Acura MDX Sport

Default

rs= really slow

smoke alot of other? smoke your motor....

www.cobbtuning.com
rhdude is offline   Reply With Quote
Old 12-11-2002, 01:34 AM   #4
dcoty
Scooby Specialist
 
Member#: 3149
Join Date: Dec 2000
Location: montreal quebec
Vehicle:
01 V7 GC/R32 sky

Default

Hey man, good to see someone else wanting to stick to n/a! Ill give you alist of my mods so you can see what you might want to look at and research:

Strommung cat back
randon tec hi flow cat
borla headers
Cobb intake
Lightend UD pulley
custom ported and polished intake manifold
custom ported and polished cylinder heads
Cobb's most aggressive n/a cams
Cobb valve springs
Cobb titanium retainers
custom valves
closed deck block
sleeved block
knife edged crankshaft
11:1 compression custom pistons (coated for nitrous use)
custom connecting rods (increased rod ratio +4mm)
(The whole engine will be balanced and blueprinted)
Upgraded fuel pump
ACT street clutch
Lightend flywheel (switching from a 14 lb to a 9 lb flywheel)
STi tranny mounts
STi engine mounts
Unichip engine management
Nitrous Express wet kit direct port 55 shot
Redline set at 8,000 rpm

My block is finished, we are waiting for the pistons and rods to come in, so Ill have my car back by xmas. tattoo collector is also going with an 11:1 compression engine. I am hoping for a 250+ crank hp from this (maybe 300 with nitrous), but a new intake manifold will help this, it is the biggest restriction.

Its a lot of work, but start with the basics and work you way up from there. This took me 2 years and a few set backs from using the wrong nitrous kit when i had my heads and cams (dont use a dry kit, go safe with a wet).

Youll find everyone really helpful on this and there is a lot of info out there too so far. Good Luck!

Dan

Last edited by dcoty; 12-11-2002 at 01:12 PM.
dcoty is offline   Reply With Quote
Old 12-11-2002, 11:11 AM   #5
xian
Scooby Newbie
 
Member#: 12526
Join Date: Nov 2001
Chapter/Region: Tri-State
Location: Northern NJ
Vehicle:
04 rex
MY04 bjm rex wagon

Default

i peronsally like the NA approach..BUT it is really expensive ....better to use a forced approach...and the work involved in a NA build up is crazy
xian is offline   Reply With Quote
Old 12-11-2002, 01:42 PM   #6
BOY
NASIOC Supporter
 
Member#: 232
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: Ft Wayne, IN
Vehicle:
99 RS-T RIP
02 Forster-S

Default

dcoty's got the right recipe but even I, the N/A stalwart, have decided to go turbo. Everything I built into my N/A build was with that possibility in mind (street -vs- spicey cams, header design, etc). So far, my turbo setup goal is under $1k complete and so far we're way below that. There's no way to get the 40-ish more hp NA for that kind of money. Listen to dcoty, he's definately on the right track.
BOY is offline   Reply With Quote
Old 12-11-2002, 01:56 PM   #7
dcoty
Scooby Specialist
 
Member#: 3149
Join Date: Dec 2000
Location: montreal quebec
Vehicle:
01 V7 GC/R32 sky

Default

Thanks BOY!

Turbo sounds very nice to me, I would love to have a turbocharged car, honestly, but I really wanted to do something reletivly different, it took a long time to decide what I should do. In the beginning I bought street cams because I diddnt know what I was going to do, but I eventually thought I should sick to N/A. I absolutely love driving turbo cars, they are tons of fun! Im curious to see what mine will drive like when i get it back.

Dan
dcoty is offline   Reply With Quote
Old 12-11-2002, 09:45 PM   #8
Kevin Thomas
Street Racing Instructor
Moderator
 
Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default Ahh

Quote:
Originally posted by dcoty
Thanks BOY!
Im curious to see what mine will drive like when i get it back.

Dan
I'm curious as well! People have always been talking about this for years now and besides Andres, you seem to be building a really go fast N/A RS. I can't wait to see how it runs myself. Good luck with it all. That is one car I would love to own. Too many turbo'd RSs out there now.
Kevin Thomas is offline   Reply With Quote
Old 12-11-2002, 10:06 PM   #9
DoctorNick
NASIOC Supporter
 
Member#: 7022
Join Date: May 2001
Vehicle:
heh, Debbie Parker
is my ride

Default

not to hijack, but dcoty: Why unichip? I think that is going to be your biggest weakest link. A haltech, tec 3 would be worlds better because of how well you can tune with those ECUs. Alot more control initially and untill the car is running well.

back to the subject: if your thinking of sticking N/A with n2o be safe and go wet. I have seen many people on this club loose a motor because of the dry stuff.

-Neal
DoctorNick is offline   Reply With Quote
Old 12-11-2002, 10:13 PM   #10
Patrick L
Scooby Specialist
 
Member#: 634
Join Date: Dec 1999
Chapter/Region: TXIC
Location: Tulsa, OK
Vehicle:
2000 Impreza 2.5RS
Becasue ITS racecar

Default

Don't forget, your going to need some stronger gears. I broke 2nd gear in my stock tranny running a ACT clutch, stock engine, cranck pulley with intake and catback exhaust.
Patrick L is offline   Reply With Quote
Old 12-12-2002, 02:45 AM   #11
dcoty
Scooby Specialist
 
Member#: 3149
Join Date: Dec 2000
Location: montreal quebec
Vehicle:
01 V7 GC/R32 sky

Default

Definitly go with a wet kit, I broke a valve using a zex dry (55 shot) kit with heads, cams etc. 3 spark plugs melted, and my fuel injector got stuck open, broke a valve. i got that fixed and when i went to tune the Unichip, i raised the redline to 7,000 rpm (i had springs and retainers to handle that) anyway, we guessed that there was some residual damage and I spun a bearing and got rodknock.

Doctor Nick: I absolutly agree with you on that, but I wasnt sure how much further I was going to go when i got the uni installed, but when i spun a bearing i decided to go all out. The unichip now is our one worry as to weather it will allow for enough corrections to get my car running right.

Top_Dog: Thats too bad with the tranny! How much did that set you back if I can ask? I will definitly have to get to this problem eventually (after I destroy it at the 1/4 track of course!).

Does anyone know what andreas has done to his bottom end? im really surious cuz I really want to see what Im up against, I guess I have to beat a 14.3 1/4 mile or something wthout nitrous to do that.

Later,
Dan

If anyone comes to montreal, thay get a ride!
dcoty is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How fast can I get my 2.5 RS without going turbo? tasq Normally Aspirated Powertrain 47 07-05-2004 05:47 PM
2.5 RS in "The Fast and the Furious" BlueDemon General Community 13 01-04-2002 06:40 AM
ROAD TEST: 2001 2.5 RS VS 2002 2.5 RS WantaSubaru Normally Aspirated Powertrain 4 06-11-2001 09:05 AM
How fast is your 2.5 RS? AndrewDotCom Factory 2.0L Turbo Powertrain 11 04-30-2001 10:11 AM
Spotting: silver 2.5 RS/red 2.5 RS in Raleigh, NC Overtime General Forum Archive 0 09-18-2000 05:58 PM


All times are GMT -4. The time now is 01:48 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.