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10-16-2019, 02:00 PM | #1 |
Scooby Newbie
Member#: 490166
Join Date: Aug 2018
Location: Virginia Beach, Va
Vehicle:2004 STI Blue |
Turbo pairing with 272 cams?
Alright, I have an 04 STI with an IAG stage 2 block with a quasi-built heads (GSC valves, springs, retainers, etc) and GSC S2 cams. I’ll be running a 38mm EWG and Grimmspeed TMIC and I’m looking for a new stock location turbo.
My power goal is high 300’s and quick spool with a streetable power band for daily driving. Anyone have any suggestions? I was looking at the Blouch Dom 1.5xtr with a 8cm hot side. The gentleman at Blouch said that 272 cams were pretty aggressive and he wouldn’t have went with them but recommended a 20g or the 1.5 to kinda counteract the cam profile. Any insight or knowledge?
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10-16-2019, 03:40 PM | #2 | |
Scooby Guru
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:2016 STI |
Quote:
So to make it work you have to do a double wammy and get a bigger turbo, which will give you an even worse power band for a daily. Cams aren't that expensive man, you aught to sell them and get new ones. |
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10-16-2019, 04:03 PM | #3 |
Scooby Guru
Member#: 80649
Join Date: Jan 2005
Chapter/Region:
South East
Location: Columbia, SC
Vehicle:2000 2.5 Auto-X RSTi Sparkly |
272's are fine for the street....288's are "very high rpm" cams. I consider 260-272 fine for street stuff and 280's up more of a "you know you're going to live above 4,500 all the time" cams.
280's are where things get lumpy so definitely a big loss of DD there. 272's will move the powerband about 400-500 rpm right, so you want to size your turbo around a BW 7163 or Garrett G25-660. Those are better versions of a 20G and 1.5 XTR. I will say smaller cams help spool quicker, but to hit high 300's on pump gas means a turbo roughly the size you're looking at anyway, and those cams will help you get there. You will likely not see full boost until 4k though, so for DD that means more puttering around and a downshift to "mean it". |
10-16-2019, 04:28 PM | #4 |
Scooby Specialist
Member#: 273868
Join Date: Feb 2011
Chapter/Region:
MAIC
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what fuel injectors ?
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10-16-2019, 04:40 PM | #5 |
Scooby Newbie
Member#: 490166
Join Date: Aug 2018
Location: Virginia Beach, Va
Vehicle:2004 STI Blue |
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10-16-2019, 04:45 PM | #6 |
Scooby Specialist
Member#: 273868
Join Date: Feb 2011
Chapter/Region:
MAIC
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I would go dom 2.5 or 3.0 with the larger hotside options and probably make over 400 on a much better overall package with components that compliment each other rather that get into a bar brawl every time the key is turned
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10-16-2019, 05:02 PM | #7 | |
Scooby Newbie
Member#: 490166
Join Date: Aug 2018
Location: Virginia Beach, Va
Vehicle:2004 STI Blue |
Quote:
I was thinking about the 2.5 initially before I realized my cams would hinder my quick spool goals. |
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10-16-2019, 05:21 PM | #8 | |
Scooby Newbie
Member#: 490166
Join Date: Aug 2018
Location: Virginia Beach, Va
Vehicle:2004 STI Blue |
Quote:
What about a 2.5 with the 8cm hot side? Would that lower the rpm range? Also, I assume you mean everything would be counteracting by “bar brawl”? |
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10-16-2019, 06:18 PM | #9 | |
Scooby Specialist
Member#: 273868
Join Date: Feb 2011
Chapter/Region:
MAIC
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Quote:
don't try to bandaid one part with another that is not paired well , the end result is most often everything sucks |
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10-16-2019, 08:16 PM | #10 | |
Scooby Guru
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:2016 STI |
Quote:
cams are cheap put the right cams on you have the wrong cams and want to do a 'work around' on that fundamental issue doesn't make much sense |
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10-17-2019, 02:06 PM | #11 |
Scooby Newbie
Member#: 434904
Join Date: Nov 2015
Location: Spokane, WA
Vehicle:2002 Impreza WRX WRB |
for a stock location turbo and mid to high 300's a 1.5xtr will work well but the low end will still be cam limited though. If you want to keep the cams go with a 2.5xtr and accept that life begins above 4k or swap to a different cam set and go 1.5xtr.
Alternately, the spoolinator GTX3071 kits are pretty sick looking. |
10-17-2019, 11:49 PM | #12 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
I have a 2.1 with tomei pon cams and a gtx3067 spoolinator and dont get into my power band til 4000 even with avcs... might be a little different with a 2.5 but I don't think much
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11-01-2019, 07:42 AM | #13 |
Scooby Newbie
Member#: 421948
Join Date: May 2015
Location: Rhode Island
Vehicle:2017 WRX STI WR Blue Pearl |
BC272 Cams with Dom1.5xtr
In a 2017 STI I’m running a closed deck 2mm long rod motor with a gsc valve train, bc272 cams, and the heads have also been ported (headgames). This motor is accompanied with a Dom 1.5xtr 10cm 3” inlet running on E85. I had the build assembled and tuned by BrenTuning and it made a healthy 511whp/436wtq on E67 @7400RPMS and 461whp/395wtq on 93. When I received the phone call about how much power it made I was in disbelief. After driving the car for 2 months and extensive “testing” I’ve determined it makes all of the power. I’m very impressed and I think these cams are a great fit for this turbo! PS this car bone stock baselined at 250whp/248wtq. Best of luck
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11-06-2019, 03:35 PM | #14 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
nevermind already posted
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