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Old 09-14-2019, 09:24 PM   #26
WRXnick16
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Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

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Forgot to mention this..

If you're going to be frequenting the track and launching your car a lot, then I recommend these mods to help with drivetrain shock and to prevent breaking the welds on the pitch mount bracket (common issue).
  • Perrin pitch stop mount brace
  • Group N pitch stop
  • Group N trans mount & ES (or Whiteline) crossmember bushings
  • Whiteline rear diff inserts (or Kartboy rear diff wedge lock system)
You can top this off with a Perrin shift stop and shifter bushing for a much better shifter feel.
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Old 09-14-2019, 11:51 PM   #27
PyroguyFTW
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Quote:
Originally Posted by WRXnick16 View Post
Forgot to mention this..

If you're going to be frequenting the track and launching your car a lot, then I recommend these mods to help with drivetrain shock and to prevent breaking the welds on the pitch mount bracket (common issue).
  • Perrin pitch stop mount brace
  • Group N pitch stop
  • Group N trans mount & ES (or Whiteline) crossmember bushings
  • Whiteline rear diff inserts (or Kartboy rear diff wedge lock system)
You can top this off with a Perrin shift stop and shifter bushing for a much better shifter feel.
Thank you! I've been thinking about trying to add some suspension gear just for peace of mind.

As an aside, after reading more about ethanol I'm just not particularly crazy about it. I'm worried about losing too much fuel economy, because as it sits I can squeeze out about 29-32 on the highway depending on the traffic, and I drive too much to take much of a hit in mileage. I realize that sounds counterintuitive to the thread title, but I really wanna have a 12 second car that can also get 30mpg lol.
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Old 09-15-2019, 04:57 AM   #28
Stronkadonk
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Join Date: Feb 2016
Location: Detroit, MI
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2017 WRX
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Quote:
Originally Posted by PyroguyFTW View Post
Thank you! I've been thinking about trying to add some suspension gear just for peace of mind.

As an aside, after reading more about ethanol I'm just not particularly crazy about it. I'm worried about losing too much fuel economy, because as it sits I can squeeze out about 29-32 on the highway depending on the traffic, and I drive too much to take much of a hit in mileage. I realize that sounds counterintuitive to the thread title, but I really wanna have a 12 second car that can also get 30mpg lol.
Ethanol is a safer fuel than 91/93 and has incredible gains in these cars. Good luck chief.
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Old 09-15-2019, 01:54 PM   #29
WRXnick16
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Join Date: May 2016
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Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

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Quote:
Originally Posted by PyroguyFTW View Post
As an aside, after reading more about ethanol I'm just not particularly crazy about it. I'm worried about losing too much fuel economy, because as it sits I can squeeze out about 29-32 on the highway depending on the traffic, and I drive too much to take much of a hit in mileage. I realize that sounds counterintuitive to the thread title, but I really wanna have a 12 second car that can also get 30mpg lol.
That's the beauty of flex fuel. Run 93 on weekdays for your commute and ethanol on the weekend or when you're going to the track .

What are the E85 prices like in your area? Despite getting slightly worse gas mileage on E50 it was actually cheaper since E85 is $1 less per gallon where I live.
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Old 09-15-2019, 02:38 PM   #30
GlarryHoodDIT
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Location: Colorado
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2016 WRX

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Generally the savings in fuel pricing ($.75-1.25) mitigates the drop in fuel economy. I know it did when I was Flex Fuel.

Hypothetical numbers but you get the point:

9 gal E85 @ $2 = $18, 5 gal 93 @ $3 = 15
$18 + $15 = $ 33 per fill up.

14 gal 93 @ $3 = $42 per fill up.

Mileage: Say you have an 8mpg drop from your ethanol mix to pump gas.

14gal x 30mpg = 420
14gal x 22mpg = 308

So you get 112 miles more per tank driving pump gas over your ethanol mix. So let's see how much more of the ethanol mix it would take to reach the same 420mi threshold you would on pump to see if it's worth it.

112mi 22mpg = 5gal
5gal @ $2.50 (half E85/half Pump) = $12.50
$12.50 + $33 = $45.50

In this scenario you would be losing $3.50 per every 420 miles. Not too bad.

Last edited by GlarryHoodDIT; 09-15-2019 at 05:25 PM.
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Old 09-16-2019, 09:58 AM   #31
noobultimatum
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ALL THE STAGES

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You don't want to go flex yet, but you want cooler IAT, more power, no FMIC?

WMI spraying m1. Cooling and auxiliary fueling for more power when you tune for it --- Direct port will net you better/more power and consistency.
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Old 09-16-2019, 12:15 PM   #32
PyroguyFTW
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Quote:
Originally Posted by WRXnick16 View Post
That's the beauty of flex fuel. Run 93 on weekdays for your commute and ethanol on the weekend or when you're going to the track .

What are the E85 prices like in your area? Despite getting slightly worse gas mileage on E50 it was actually cheaper since E85 is $1 less per gallon where I live.
Fairly expensive, where I live has some of the worst fuel taxes in the country shy of NY and CA. It's about $.60-.70 cheaper than 93, so it doesn't end up being too much cheaper. I just can't decide on flex fuel, but if I do get it, it'll be in a few years most likely, unless I can get a good deal on a flex fuel sensor. I guess right now I'm just trying to put together a list of parts to acquire.

Quote:
Originally Posted by noobultimatum View Post
You don't want to go flex yet, but you want cooler IAT, more power, no FMIC?

WMI spraying m1. Cooling and auxiliary fueling for more power when you tune for it --- Direct port will net you better/more power and consistency.
Meth may be a possibility, but on the other hand it defeats the purpose of a reliable daily driver should it fail.
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Old 09-16-2019, 12:42 PM   #33
noobultimatum
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ALL THE STAGES

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Quote:
Originally Posted by PyroguyFTW View Post



Meth may be a possibility, but on the other hand it defeats the purpose of a reliable daily driver should it fail.
There are many kits available that have failsafes. Some better than others. Some with redundant failsafes for extra assurance. It's up to you really, but the market is ripe with kits for a safe set up.

I personally have an aquamist set up i will be running. I contacted prometh about my intake manifold to tap it and set up the direct port lines. If I need to re-do a meth kit, or add another kit to another project in the future... I will probably work exclusively with them. They have excellent customer service and are insanely knowledgeable. I'd suggest you give them a call and ask away with any questions you may have --- get a quote while on the line as well for how much it'll run you so you can compare between WMI and Flexfuel.
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Old 09-16-2019, 12:51 PM   #34
WRXnick16
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Location: W Sac, CA
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2019 STI CWP

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Quote:
Originally Posted by PyroguyFTW View Post
Fairly expensive, where I live has some of the worst fuel taxes in the country shy of NY and CA.
I'm lucky enough to live in California The local Shell station that I regularly pump gas at recently dropped to $3.79 for 91... E85 is $2.79. It was a no brainer for me considering that the flex fuel kit was only $600.

Unfortunately, the flex fuel 'kit' is over $1,500 for the STI even if you piece it together since it also requires injectors, fuel pump, fpr & fuel pressure sensor. So look at it this way.. it's (relatively) cheap for the WRX's FA20
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Old 09-16-2019, 12:54 PM   #35
TrashyMG
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Quote:
Originally Posted by WRXnick16 View Post
I'm lucky enough to live in California The local Shell station that I regularly pump gas at recently dropped to $3.79 for 91...
damn I only pay $3.05 a gallon for 93 in VT. But there is no E85 in sight anywhere in my area.

Last edited by TrashyMG; 09-16-2019 at 01:05 PM.
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Old 09-16-2019, 01:08 PM   #36
WRXnick16
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Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

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Quote:
Originally Posted by TrashyMG View Post
damn I only pay $3.05 a gallon for 93 in VT. But there is no E85 in sight anywhere in my area.
I can get it slightly cheaper if I don't go to Shell or Chevron, but the 91 octane is already terrible here so I'd rather not risk it.
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Old 09-16-2019, 01:36 PM   #37
PyroguyFTW
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Member#: 473226
Join Date: Aug 2017
Location: PA
Vehicle:
2012 Outback

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Quote:
Originally Posted by WRXnick16 View Post
I'm lucky enough to live in California The local Shell station that I regularly pump gas at recently dropped to $3.79 for 91... E85 is $2.79. It was a no brainer for me considering that the flex fuel kit was only $600.

Unfortunately, the flex fuel 'kit' is over $1,500 for the STI even if you piece it together since it also requires injectors, fuel pump, fpr & fuel pressure sensor. So look at it this way.. it's (relatively) cheap for the WRX's FA20
I think I will get a flex fuel sensor and Brentune down the road. It'll go with the new intercooler just so I can get it all taken care of at once.
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