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Old 10-11-2019, 06:04 PM   #1
JayCee.FA20
Scooby Newbie
 
Member#: 503018
Join Date: Jun 2019
Default Cobb flex fuel vs delicious flex fuel

Which one did you guys grab?
Delicious or cobb for your flex fuel kits
Both around the same price range


Also, is anyone running e85 with a stock intercooler
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Old 10-11-2019, 09:02 PM   #2
WRXnick16
Scooby Specialist
 
Member#: 447898
Join Date: May 2016
Chapter/Region: BAIC
Location: W Sac, CA
Vehicle:
2016 WRX (traded)
2019 STI CWP

Default

Cobb.

Yes, you can run flex fuel on the stock tmic. There are pros & cons to the stock tube & fin (included one of my posts below). The plastic end-tanks will become a weak link once you crank up the boost.

Quote:
Originally Posted by WRXnick16 View Post
The stock TMIC is decent considering its size and location. Aftermarket TMICs don't prevent heatsoak as marketing would like us to believe. An aftermarket intercooler wont recover as quickly as the OEM tube & fin core. Aftermarket TMICs are heavier and have more thermal mass which allows them to heat up slower (good thing), but that's not very useful after the first heat cycle since the increased thermal mass will also increase its time to recover and cool down (bad thing). This applies to whether you're sitting in traffic for long periods of time or doing hard track passes. E85's properties also help compensate for the higher intake charge temps and reduce the chances of detonation.

Here's a link to Ron testing a GS intake on his WRX with stock TMIC & stock exhaust. He managed 330 whp & 350 wtq with flex fuel on the stock intake, tmic & exhaust. As you can see, the intake added very little power. Flex fuel is by far the best bang-for-the-buck mod for these cars.

https://forums.nasioc.com/forums/sho....php?t=2766253
I recommend heading over to the FA20 sub-forum and doing some research.
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Old 10-11-2019, 09:19 PM   #3
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

Default

Another good example of power on stock tmic & exhaust.

https://forums.nasioc.com/forums/sho...&postcount=184
Quote:
Originally Posted by tANNERRRR View Post
Here's my flex fuel graph. Dyno tuned by Ron Watson.

Mods:
Cobb Flex Fuel (E60 tuned)
Grimmspeed Intake
Grimmspeed 3 port EBCS
IAG EGR delete
IAG TGV delete

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