shibles
Senior Member
- First Name
- Seth
- Joined
- May 12, 2018
- Threads
- 15
- Messages
- 247
- Reaction score
- 159
- Location
- Athens, GA
- Vehicle(s)
- 2018 Honda Civic Si Coupe
- Vehicle Showcase
- 1
- Thread starter
- #1
So back in the end of last December I got my brand new Si coupe, and so far I have loved the car. Great looks, great power (compared to my old stock engine 1998 Miata), great features, I just love it all. But now I’m looking to upgrade, and I’m liking the look of SiriMoto’s Flex Fuel kit and Hondata FlashPro, and I think I’ll run the +9 psi for sport mode plus full throttle shift basemap, and use E85 fuel as often as I can. This is the first car I’ve ever decided to upgrade so bear with me here and correct me where I’m wrong. So my questions are:
1. If you’ve done this for your Si, how did the stock intake and exhaust handle it? As in do I need to upgrade to cold air intake and down pipes for better air flow or do the stock parts work just fine? (I ask because I’m on a bit of a budget and would prefer to be able to easily return the car to stock for now)
2. How does the E85 kit work? I’m confused as to how (looking at the kit) connecting in a few new hoses and adding some wires can suddenly make the car able to run with ethanol. Can that not damage the engine if the engine parts aren’t made to use that fuel? (I did read somewhere that the Civic is so widely sold internationally that it’s made to run on E40, E50, or any percentage of ethanol because of what other countries use, but I assumed they slightly modified the cars sent to these countries based on what type of fuel is available, right? Or are all civic engines built to be able to run any percentage of petrol or ethanol?)
3. With my configuration, I won’t be running Sport mode too often, only for if I need to pass someone, or I’m on a mountain road and want to let loose, etc. So with my configuration, how likely is it that I’ll damage either my engine, my turbocharger, transmission, or anything else when redlining? I’ve heard that the +6 psi basemap works fine for daily driving, that’s why I want to use the +9 psi on sport, but I’ve noticed the videos I’ve watched of people using +9 are afraid to redline. If that’s too damaging, I have no problem using +6 psi on sport mode, because I do want my engine to last and I want to be able to redline, I just wanted to coax out the little extra power I know it can do (and was a little disappointed that stock Sport mode doesn’t actually increase power).
4. General thoughts? How much did you like these upgrades, and would you recommend it? Anything you think I missed that I should keep in mind before I buy? Or do you have any suggestions for similar better products? I’d prefer to stay at or under the current price for the products right now (~$1300).
That’s all of my questions for now, thank you!
1. If you’ve done this for your Si, how did the stock intake and exhaust handle it? As in do I need to upgrade to cold air intake and down pipes for better air flow or do the stock parts work just fine? (I ask because I’m on a bit of a budget and would prefer to be able to easily return the car to stock for now)
2. How does the E85 kit work? I’m confused as to how (looking at the kit) connecting in a few new hoses and adding some wires can suddenly make the car able to run with ethanol. Can that not damage the engine if the engine parts aren’t made to use that fuel? (I did read somewhere that the Civic is so widely sold internationally that it’s made to run on E40, E50, or any percentage of ethanol because of what other countries use, but I assumed they slightly modified the cars sent to these countries based on what type of fuel is available, right? Or are all civic engines built to be able to run any percentage of petrol or ethanol?)
3. With my configuration, I won’t be running Sport mode too often, only for if I need to pass someone, or I’m on a mountain road and want to let loose, etc. So with my configuration, how likely is it that I’ll damage either my engine, my turbocharger, transmission, or anything else when redlining? I’ve heard that the +6 psi basemap works fine for daily driving, that’s why I want to use the +9 psi on sport, but I’ve noticed the videos I’ve watched of people using +9 are afraid to redline. If that’s too damaging, I have no problem using +6 psi on sport mode, because I do want my engine to last and I want to be able to redline, I just wanted to coax out the little extra power I know it can do (and was a little disappointed that stock Sport mode doesn’t actually increase power).
4. General thoughts? How much did you like these upgrades, and would you recommend it? Anything you think I missed that I should keep in mind before I buy? Or do you have any suggestions for similar better products? I’d prefer to stay at or under the current price for the products right now (~$1300).
That’s all of my questions for now, thank you!
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