Cost Vs Gain

Gregjeffrey1
Learner Driver
Posts: 9
Joined: Tue Jan 05, 2016 2:41 pm

Cost Vs Gain

Postby Gregjeffrey1 » Mon Feb 06, 2017 3:56 pm

Hi All

I couldn't find a thread that was similar so thought I would start one up. I'm sharing my cost vs gain in terms of my mods and thought I'd suggest a format for others to also share. I'm also keeping it solely at an engine (and related items) performance level, so wheels, tyres, suspension etc are things I'm not factoring in:

Car: 2011 WRX

Mods: (given all the discussions I've seen around using the word "stage" I've chosen not to use it)
Part 1 - Invidia TBE, Walbro Fuel pump + Tune; Cost: $3,200
Part 2 - Process West Verticooler and cold air intake, Turbosmart actuator + Tune: Cost: $2,800

Gains:
When stock: 150kw atw (I have seen many variations depending on car, which dyno, type of day dyno'ed etc but 150kw atw seems about average)
After Part 1: 175 kw atw
After Part 2: 200 kw atw

Total Cost: $6,000

Cost per gain: $120 per Kw (50kw gain over stock car)

Where: Brisbane

Who: Ignite Mechanical and Custom

Performance (0-100 km/h): (hoping some of you will have "real" figures as opposed to the guestimates I have for my car)
When stock: Official figures say 5.3 secs - has anyone done a timed run in theirs?
Now: I don't have anything official but I think sub 5 seconds; it feels considerably faster than when it was stock

specr
Probationary Driver
Posts: 93
Joined: Tue Sep 27, 2016 11:22 am
Location: Northern Beaches NSW

Re: Cost Vs Gain

Postby specr » Mon Feb 06, 2017 4:51 pm

OK I'm not so sure about Brisbane but in Sydney you can get away with that package for easily under $4500. Not including the intercooler (I have an STI so I don't need to upgrade it for 200kw) I got quoted $3600. That is an invidia q300 turbo back exhaust, process west CAI, PSR silicon intake+SFB, fitment and tune. I was supplying my own 3 port boost solenoid. Add about $1000 for the verticooler? I've never looked at the price. I'm guessing your cost sky rocketed having to get it retuned for the CAI.

Also it is obviously better to get it all done at once so you are only paying for 1 tune.

With a good launch I would expect you are doing under 5 seconds to 100kmh with a 200kw car, let us know if you actually manage to get it timed. Also note that speedos can be out by up to 10km/h
MY13 STI Spec R - BLACK

User avatar
Subey
Red Bugeye Driver
Red Bugeye Driver
Posts: 344
Joined: Wed Jul 14, 2010 6:21 pm

Re: Cost Vs Gain

Postby Subey » Thu Feb 09, 2017 8:14 am

I went from 105kw atw (untuned EJ205 motor with td04) to 275kw atw (new EJ207 short block, AVCS conversion, Blouch turbo and E85) for approx $15k for a cost per kw of $88. Of course there were many variants in between, but that's all regret spend.

Parts
EJ207 short block + new water / 11mm oil pump
Reco'd 02 STi heads
ID 1000 injectors and billet rails/parallel fuel setup
STi (TGV-less) intake
GRB STi intercooler
APS TBE
Blouch Dom 1.5 7cm
PSR UEL headers + ceramic coating
Killer B oil pickup + windage tray
AVCS wiring
sheet of labour

Hard to quantify the per/kw value of each item as they all work in unison. Best bang for buck is probably TBE and tune followed by E85. injector, fuel pump and intercooler upgrade.

Aleck at Got It Rex did all my mechanical work and I tuned the car myself.

specr
Probationary Driver
Posts: 93
Joined: Tue Sep 27, 2016 11:22 am
Location: Northern Beaches NSW

Re: Cost Vs Gain

Postby specr » Thu Feb 09, 2017 9:44 am

Subey wrote:I went from 105kw atw (untuned EJ205 motor with td04) to 275kw atw (new EJ207 short block, AVCS conversion, Blouch turbo and E85) for approx $15k for a cost per kw of $88. Of course there were many variants in between, but that's all regret spend.

Parts
EJ207 short block + new water / 11mm oil pump
Reco'd 02 STi heads
ID 1000 injectors and billet rails/parallel fuel setup
STi (TGV-less) intake
GRB STi intercooler
APS TBE
Blouch Dom 1.5 7cm
PSR UEL headers + ceramic coating
Killer B oil pickup + windage tray
AVCS wiring
sheet of labour

Hard to quantify the per/kw value of each item as they all work in unison. Best bang for buck is probably TBE and tune followed by E85. injector, fuel pump and intercooler upgrade.

Aleck at Got It Rex did all my mechanical work and I tuned the car myself.


Are you still running the stock driveline? I assume 275kw would put a bunch of strain on it

I'll add my cost per kw when I get my mods in order but not sure if I'll be able to get a before run or not
MY13 STI Spec R - BLACK

User avatar
Subey
Red Bugeye Driver
Red Bugeye Driver
Posts: 344
Joined: Wed Jul 14, 2010 6:21 pm

Re: Cost Vs Gain

Postby Subey » Thu Feb 09, 2017 12:27 pm

specr wrote:Are you still running the stock driveline? I assume 275kw would put a bunch of strain on it


No, far from it. 02 STi box, R180 rear and full 114.3 hub swap.

specr
Probationary Driver
Posts: 93
Joined: Tue Sep 27, 2016 11:22 am
Location: Northern Beaches NSW

Re: Cost Vs Gain

Postby specr » Thu Feb 09, 2017 1:59 pm

Subey wrote:
specr wrote:Are you still running the stock driveline? I assume 275kw would put a bunch of strain on it


No, far from it. 02 STi box, R180 rear and full 114.3 hub swap.


Is the driveline in your cost per kw? Generally adds about $4-6k for most people
MY13 STI Spec R - BLACK

User avatar
Subey
Red Bugeye Driver
Red Bugeye Driver
Posts: 344
Joined: Wed Jul 14, 2010 6:21 pm

Re: Cost Vs Gain

Postby Subey » Thu Feb 09, 2017 2:27 pm

No, not included as it's not performance related. Cost was north of 6k as the gearbox alone was $3k from memory. 4x hubs, new bearings, brembos, DBA rotors all round, R180 and fluids all add up.

specr
Probationary Driver
Posts: 93
Joined: Tue Sep 27, 2016 11:22 am
Location: Northern Beaches NSW

Re: Cost Vs Gain

Postby specr » Thu Feb 09, 2017 2:55 pm

Yeah that's the thing though isn't it, I'd probably add that to the cost per kw because you won't be driving for very long with a motor that powerful on a standard wrx driveline. It's all part of the supporting mods to reach a certain goal power level wise.
MY13 STI Spec R - BLACK

Ana_Pin
Learner Driver
Posts: 1
Joined: Thu Feb 09, 2017 4:53 pm

Re: Cost Vs Gain

Postby Ana_Pin » Thu Feb 09, 2017 5:02 pm

Hey Guys, I'm shooting a video on 14th Feb, next Tuesday and need a WRX car from 2-5pm in Erskineville. Your car will be parked and we just need you to bring it, stay 3 hours and that's all. We are paying $300 ($100 per hour). Please send me an email (ana.pinheiro@303mullenlowe.com.au) if you're interested. Thanks!

tim33h
Impreza RS Driver
Posts: 185
Joined: Sun Jun 07, 2015 9:46 pm

Cost Vs Gain

Postby tim33h » Fri Feb 10, 2017 7:56 am

I will use Stages as Cobb Tuning have branded their products this way.

Stock 2015 STI
165kw atw

Stage 1:
$1000 Cobb AP
Peak power felt like it stayed the same but the low to mid range really picked up. Never dynoed

Stage 2:
Invidia DP $850
PW CAI $420
Silicon TIP $200
Cobb 3 port EBCS $220
Tune $800
206Kw, MASSIVE improvement through the entire rev range.

Stage 3 + Flex fuel
Cobb Flex Fuel kit (swapped the injectors to ID1000 and FP to DW300, kit originally comes with Cobb 725cc?? And AEM FP) $2500
Tuning $1200(?? I think, can't remember)
230KW. This is probably my most fave power mod... but as mentioned earlier... it works in unison with the other mods.

Install costs... I dunno... I got them to do it whilst doing the 6monthly service as well. Every workshop will charge their own hourly rate I guess so YMMV

Just about all the parts were bought from Troy at Prospeed racing so you can cross check the pricing from their website. I was just going off the top of my head.



Sent from my iPhone using Tapatalk

Return to “Photo Gallery and Build Threads”

Who is online

Users browsing this forum: No registered users and 4 guests