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03-19-2019, 02:35 PM | #1 |
Scooby Newbie
Member#: 494757
Join Date: Dec 2018
Chapter/Region:
MWSOC
Location: Cincinnati, OH
Vehicle:2011 STI Hatch Black |
“Final” upgrade order?
So, I have the biggest hurdle out-of-the-way, in that I replaced my engine with a built block. I’m to the point where I have three major upgrades left, and I’m curious what the community thinks as far as should I do it all at once, after saving up for a while, or if I should do the three chunks involved as I can. Those parts being: intercooler, fueling system, turbo. The main reason I’m thinking about just waiting, is because I don’t think my current intercooler (stock) or fueling, will be able to support the turbo that I want. What I mean is, I don’t think I’ll notice any difference with any of the three, and I really need all three to see improvement. My end goal is about 500 wheel horsepower, which is a number I’ve pulled out of my butt if I’m being honest. I have made specific parts lists, but I don’t have them because I’m writing this on my phone. My question is essentially just in general should I do those three things at the same time?
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03-19-2019, 05:02 PM | #2 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
The turbo and fueling are integral parts to achieve your goal, and the intercooler may or may not be required (depends how hard you're pushing that turbo). What turbo have you selected and what boost will you be running?
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03-19-2019, 07:48 PM | #3 |
Scooby Newbie
Member#: 494757
Join Date: Dec 2018
Chapter/Region:
MWSOC
Location: Cincinnati, OH
Vehicle:2011 STI Hatch Black |
Well...I was thinking an ATP GTX3076R with external gate. Frankly, there are so many posts, so many people doing their own thing, I don't know if that will meet my goals, if it'll blow past them (pun not intended until I realized there was on there) or what. I am not planning on doing E85 unless it's absolutely required to get to where I want.
As far as boost...I don't know the answer to that question, I would probably start at around 20-22 and go from there. I'm a novice, so it's mostly just play for me, nothing serious riding on the build or anything. Fun at track days and such. |
03-19-2019, 08:49 PM | #4 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
You'll be lucky to flow past 450 crank hp at only 22 psi on that turbo. I suggest seeking a tuner to help you make a better plan.
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03-20-2019, 10:33 AM | #5 |
Scooby Specialist
Member#: 468393
Join Date: May 2017
Location: PDX OREGON
Vehicle:2017 STI |
What ocatne are you running? Any chance of ditching the front mount and going with meth?
You start loosing out on fun factor to get more power up top. You have the build block - how built is this block? Efr 7670 flows similar to the 3076 (I think) and I'm hitting road dyno numbers of 475-500 on pump 92 @ 23 psi. Obviously those numbers are high, and ... it's a road dyno. But, it's +/- 30 whp I bet. Main thing is it's a blast to rip around. 2nd gear spins em' more than I ever got out of my efr 7163. Are you going rotated? Or Stock location? What's your current fueling? I like to stay busy with playing so I would upgrade one at a time. Fuel, turbo, intercooler or meth. |
03-20-2019, 01:08 PM | #6 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
EDIT: my terrible early morning math failed me...
22 psi gives you approximately a 2.5 PR which peaks at ~65 lb/min: Last edited by mrsaturn7085; 03-21-2019 at 01:14 PM. |
03-20-2019, 09:01 PM | #7 |
Scooby Specialist
Member#: 108091
Join Date: Feb 2006
Location: Fargo, ND
Vehicle:2002 WRX |
No, 22 psi is a 2.5PR.
PR is calculated as: = (Absolute + desired boost)/14.7 So we have: 14.7+22= 36.7 36.7/14.7= 2.49 His PR at 22 psi would be about 2.5 give or take depending on elevation. Which is around 65lb/hr. Based on the widely accepted 10hp per lb/hr that would net around 650bhp. That being said, the turbine housing will probably kill all of his fun well before that happens. |
03-20-2019, 11:17 PM | #8 | |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
Quote:
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03-21-2019, 12:27 AM | #9 | |
Scooby Newbie
Member#: 494757
Join Date: Dec 2018
Chapter/Region:
MWSOC
Location: Cincinnati, OH
Vehicle:2011 STI Hatch Black |
Quote:
I pulled the 500 number out of my butt as a way to just have a goal. The 22psi was more of an “I don’t really know” since I am learning and tweaking as I go and learn the limits of what I have. I definitely don’t want to “kill all the fun” with that turbine housing and it is easy to change a line item on a list so I am up for suggestions on more fun 500hp options. Gas is pump 93. I don’t really want to go meth but that’s mostly due to lack of any previous reading about it. |
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03-21-2019, 01:15 PM | #10 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
Here's a good question then - why are you asking NASIOC these questions rather than Rallispec?
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03-21-2019, 03:37 PM | #11 | |
Scooby Specialist
Member#: 468393
Join Date: May 2017
Location: PDX OREGON
Vehicle:2017 STI |
Quote:
Get the upgraded injectors. 1050x will work great. Get your tune done for pump gas. Then, get a tune done for your choice of TORCO additive. 1oz, 2oz, of 3oz. That way you can turn it up when you want to buy a few cans of Torco. OR you can by a pail (5 gallons) of TORCO and carry a gallon in the trunk like me. I put 3 oz / gallon at every fill up. I was running the 7163 at 34-35 psi and hitting ~ 480 on the road dyno, but, tourqe was over 500 and, it was very quick down low. I've heard/seen the FP blue do some excellent numbers also. The one thing about the Blue is that it uses a stock down pipe flange while the EFR is T25. SO, if you want to upgrade the blue to a green or black one day you won't have to change your up pipe. To me your answers are simple. Even if you're stuck at 93 pump. Get a setup that will allow you to run close to 500 should you decide to up the octane, and if you don't you'll still be having fun because you didn't buy a lag monster turbo that will hit 500, but do so at 5800 Rpm. |
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