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09-14-2018, 05:45 PM | #1 |
Scooby Specialist
Member#: 11854
Join Date: Nov 2001
Chapter/Region:
South East
Location: Floriduh
Vehicle:2018 Beloved Bugeye+ Formerly WRB, now ISM |
Safe, quiet and clean ~350hp?
Oops, forgot - we're talking about a 2018 STi!
I've been there, done that with loud, proud and obnoxious. Had a '02 bugeye with many, many mods until a year ago today. I'm old now and I would strongly prefer to be making decent power without dealing with the drone, BOV squeals and loads of NVH that come with aggressively modifying a Scooby. I would also like to keep my emissions hardware fully intact and functional. Ideally, any mods would make the car more effectively suck, bang and blow, so I would love to hear we can meet or beat the OEM mpg. Am I suffering early onset dementia? Can we get a little more than 45bhp out of the ancient, awful, horrible EJ257 without swapping everything but the longblock*? I did several searches and nothing came back answering my question. If I missed something, please post a link and let's lock this thread. * /s I love a semi-closed deck, reliable engine with plenty of forged components and a long history of making more than adequate power
* Registered users of the site do not see these ads.
Last edited by TampaWRX; 09-14-2018 at 09:08 PM. |
09-14-2018, 06:23 PM | #2 |
Scooby Newbie
Member#: 49931
Join Date: Dec 2003
Chapter/Region:
MWSOC
Location: Grand Rapids, MI
Vehicle:0305 wrx/Xt black/black |
The sixes sound like porsches if you squint hard enough. 3.6 and an ecu tuned exhaust cant be beat. Ill be doing that as im aging on too...
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09-14-2018, 06:54 PM | #3 |
Scooby Specialist
Member#: 239822
Join Date: Mar 2010
Chapter/Region:
South East
Location: America's Penis
Vehicle:2010 WRX pandiculation |
What car are we talking about?
The things that make our cars droney and loud have next to nothing to do with power. Keep the stock intake and catback and stay IWG and the other power adders don’t make much noise. |
09-14-2018, 08:53 PM | #4 |
Scooby Newbie
Member#: 490326
Join Date: Aug 2018
Chapter/Region:
E. Canada
Location: New-Brunswick, Canada
Vehicle:2012 STI White |
Varex muffler and close the valve
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09-15-2018, 03:40 PM | #5 |
Scooby Specialist
Member#: 459799
Join Date: Dec 2016
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Safe, quiet and clean ~350hp?
Really are awesome. Put one on an 02 wrx and it was super convenient. Loud and proud until it needed to be quiet as a mouse. 350whp (mustang Dyno) on a stock block would be doable with a bigger turbo, but either way it is borrowed time on the life of the pistons. They just break eventually. |
09-15-2018, 08:25 PM | #6 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
315 whp is doable on the single AVCS EJ257 at stock boost with nothing more than intake and exhaust parts and good tuning.
You goal is completely reasonable but if you shoot for 325-335 whp and don't get hung up on 350 being a magic number, you'll have a much easier go at it. |
09-16-2018, 06:54 AM | #7 |
Scooby Specialist
Member#: 476573
Join Date: Oct 2017
Chapter/Region:
MAIC
Location: Lovettsville, Virginia
Vehicle:2008 Impreza WRX STi Silver |
My 2008 STI has led its whole life(75k miles) in the 315-330 whp range so I’d agree that if you lower our expectations a hair you’re probably safe but it all comes down to the tune and a bit of luck.
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09-17-2018, 01:56 PM | #8 | |
Scooby Specialist
Member#: 372777
Join Date: Nov 2013
Chapter/Region:
SCIC
Location: Compton, CA
Vehicle:2014 WRX Sedan Lmtd WRB |
Quote:
I was running 367/400 on E85 on my WRX with just bolt ons and stock turbo, it can be done. For pump gas you'll definitely need a larger turbo if you have no E85 available near you. When it comes down to it, everything breaks when you race it. |
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09-17-2018, 04:04 PM | #9 |
Scooby Newbie
Member#: 474472
Join Date: Sep 2017
Chapter/Region:
MWSOC
Location: Northern IN
Vehicle:2000 Impreza RS |
I would recommend looking at fueling upgrades and a flex fuel tune/setup.
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09-17-2018, 10:11 PM | #10 |
Scooby Specialist
Member#: 370806
Join Date: Oct 2013
Location: Northern Indiana
Vehicle:2019 WRX/STI DGM 23 Nissan Frontier Pro 4x |
Stock exhaust, DP, fuel pump/injectors, Protune. Enjoy.
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09-18-2018, 12:08 AM | #11 |
Scooby Guru
Member#: 140444
Join Date: Feb 2007
Chapter/Region:
NWIC
Location: Near Seattle, WA
Vehicle:05 Stage Free LGT ATP 3076, 6MT, AVO FMIC |
350 crank horsepower, Dynojet wheel horsepower, or Mustang wheel horsepower?
I got 377whp with an ATP GT3076, catted downpipe, 3" Perrin resonated midpipe and stock mufflers on my 05 LGT. Just pump gas, no water/meth. I think it was a Dynocom dyno (not sure, it was several yeares ago) and it read about like a Dynojet. The newer GTX3071 makes similar power (but comes on at lower RPM), so I guess for 350whp, a GTX3067 from ATP or KillerB would probably be about right. I think... search for GTX 3067 just to be sure I'm not off my rocker. |
09-18-2018, 05:30 PM | #12 |
Scooby Newbie
Member#: 260561
Join Date: Oct 2010
Chapter/Region:
TXIC
Location: Dallas, TX
Vehicle:2006 Impreza WRX Ltd Grey |
Injectors, fuel pump, and E85 will get you close enough on a stock turbo/longblock. It's a really fun setup for the street.
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09-18-2018, 05:59 PM | #13 |
Scooby Specialist
Member#: 459799
Join Date: Dec 2016
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09-19-2018, 01:28 AM | #14 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
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09-19-2018, 05:24 PM | #15 |
Scooby Newbie
Member#: 77863
Join Date: Dec 2004
Chapter/Region:
South East
Location: FL
Vehicle:2013 WRX WRB |
340whp 370wtq on E75.
2013 WRX, 22psi, 20k miles. It's a great DD setup. |
01-12-2019, 03:21 PM | #16 |
Scooby Specialist
Member#: 11854
Join Date: Nov 2001
Chapter/Region:
South East
Location: Floriduh
Vehicle:2018 Beloved Bugeye+ Formerly WRB, now ISM |
Life got in the way and I forgot to come back and thank everyone for your replies to this one. I'm all about adjusting expectations if it means safe, quiet power. I like the idea of minor tweaks a good tune. Thanks all!
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