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View Poll Results: Which would you choose?
Mix 87 and 93 depending on the season, and live with timing pull. 0 0%
Spend $900 on a flexfuel kit with tune, and mix 87 and E85 depending on the season. 0 0%
Install 4 0.3mm check valve jets in intake manifold. Activate at 50-75% of max boost. Run 87. 0 0%
Install pre-turbo nozzle. Run 87. 0 0%
Install bigger FMIC. Run 87. 0 0%
Multiple Choice Poll. Voters: 0. You may not vote on this poll

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  #1  
Old 09-04-2019, 07:45 PM
Dust Dust is offline
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Join Date: Mar 2007
Location: Frankfort, Kentucky
Posts: 227
Default Which step for avoiding detonation on 87?

I just purchased a 1.4L turbocharged vehicle that is tuned at the factory for 87 octane, but during the summer, will pull timing even on 93 due to knock. I am not looking for “more power”, but simply looking to not have timing pulled. I understand that 87 and performance don't mix, but the wife may be driving the car, so I want 87 as the baseline if she fills up.

I am considering the following five choices.

I own the necessary parts for the water/meth kit, as well as enough meth to keep the kit fed for 2 years.
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  #2  
Old 10-06-2019, 07:53 AM
rotrex rotrex is offline
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Join Date: Jan 2014
Location: Germany
Posts: 184
Default Re: Which step for avoiding detonation on 87?

All water injection that actually does something, i.e. provides a high enough water to fuel ratio, needs a retune.
Without adapted ignition timing, it will actually reduce power.

You could add a FMIC spray as an alternative. This won’t require a retune.
Flexfuel is also a good choice.
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  #3  
Old 11-06-2019, 02:33 PM
Dust Dust is offline
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Join Date: Mar 2007
Location: Frankfort, Kentucky
Posts: 227
Default Re: Which step for avoiding detonation on 87?

Quote:
Originally Posted by rotrex View Post
All water injection that actually does something, i.e. provides a high enough water to fuel ratio, needs a retune.
Without adapted ignition timing, it will actually reduce power.

You could add a FMIC spray as an alternative. This won’t require a retune.
Flexfuel is also a good choice.
FMIC is behind AC condenser. That is why people have problems with knock. I guess I could cool the AC condenser.
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