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2015 Kia Optima
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Discussion Starter #1
What would you do if you had only 5 mods to do to your SX T to gain power?
Without touching the engine .
 

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2013 Kia Optima 2.0T
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Your K5 Optima Vendor
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I'm confused, because you said "without touching the engine" but all of these would require you to mod the engine, with the exception of the midpipe and catch cans. :unsure:

There are a lot of post about adding HP. But to save you time and money. These are the 5 things I will do:

-intake
-mid pipe
-catch cans (it won’t increase hp but very useful for our engine)
-BOV
-Intercooler
 

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Discussion Starter #8
I'm confused, because you said "without touching the engine" but all of these would require you to mod the engine, with the exception of the midpipe and catch cans. <img src="http://www.optimaforums.com/forum/images/smilies/unsure.gif" border="0" alt="" title="Unsure" class="inlineimg" />

There are a lot of post about adding HP. But to save you time and money. These are the 5 things I will do:

-intake
-mid pipe
-catch cans (it won’t increase hp but very useful for our engine)
-BOV
-Intercooler
I meant without touching internals. Just bolt ons.
 

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Premium Member
2012 Kia Optima SX-T
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1,440 Posts
So here would be my Top Five list (in order of "bang-for-the-buck"):

1] LAP3USA Uncle Boost ECU canned tune (this requires the two mod's a & b) - Stage 1 to start, switching to State 1.5+ after #2/3/4 are done.
(a) OCC on PCV line to intake
(b) HKS M40XL or M45XL racing plugs

2] CPe MidPipe w/HFC and resonator
3] CPe Catback
4] InJen Intake
5] Wagner Intercooler

Run ONLY 93 octane Top Tier fuel (from Costco/Shell/Exxon/etc.) and a really good synthetic oil (0W-40 or 5W-40).
 

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2018 Kia Optima
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745 Posts
So here would be my Top Five list (in order of "bang-for-the-buck"):

1] LAP3USA Uncle Boost ECU canned tune (this requires the two mod's a & b) - Stage 1 to start, switching to State 1.5+ after #2/3/4 are done.
(a) OCC on PCV line to intake
(b) HKS M40XL or M45XL racing plugs

2] CPe MidPipe w/HFC and resonator
3] CPe Catback
4] InJen Intake
5] Wagner Intercooler

Run ONLY 93 octane Top Tier fuel (from Costco/Shell/Exxon/etc.) and a really good synthetic oil (0W-40 or 5W-40).
Well if one of the requirement is to use *ONLY* 93 octane fuel then I suppose that would eliminate California Kia Optima owners since 93 octane is not widely available here in CA--heck we don't even have 92 octane here.
 

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2012 Kia Optima SX-T
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Well if one of the requirement is to use *ONLY* 93 octane fuel then I suppose that would eliminate California Kia Optima owners since 93 octane is not widely available here in CA--heck we don't even have 92 octane here.
Not really. It just means you can't run Stage 1.5+ with the LAP3USA ECU tune. You run the Stage 1 tune with all the same mods and generate safely only the amount of power the fuel available to you can create. That would be one option anyway. Another would be to mix with what you can get (let's assume it is 91 octane) with E85 to get a higher overall octane level and still run the Stage 1.5+ tune. Where there is a will, I bet there is a way....

Enjoy your ride!
 

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2018 Kia Optima
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Hmmm that's interesting about mixing 91 octane and E85--since I know nothing about the ramifications from running such a mixture, how exactly might doing that affect daily drivability and emissions (here in CA the biggest nanny state in the nation they care a whole lot about pollution), let alone any possible long-term side effects on the engine from burning such a mixture? It sucks that us folks aren't able to realize full power/torque gains from using a product such as the LAP3 because our state thinks it knows what's best for us.
 

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Exactly, who doesn't like smog, it's good for you.

Seriously though, NY is pretty strong on emissions too, especially in downstate areas, but we have 93 all over. In fact it is harder to find 93 in less regulated areas.

You would want to find out how much ethanol is in available 91. If it has already 10%, I wouldn't mix another 10% from E85.
 

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2012 Kia Optima
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What would you do if you had only 5 mods to do to your SX T to gain power?
Without touching the engine .
There is already a thread on there with best mods for gains including dyno charts. please search.
 

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2012 & 2015 Kia Optima SX & SXL
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LAP3 ECU tune is going to be the best bang for your buck.

Intake doesn't make a single hp, and the stock intake has been proven to be fine up to 350WHP(over 400BHP+)

You shouldn't be running HFC/Catless exhaust until you have proper ECU tune to prevent overboosting. A lot of people have blown spark plugs and damaged engines from running HFC/Catless exhaust without ECU tuning. The Stock tune is mapped to operate with backpressure, and if you remove them without ECU logic changed, you will run into overboost, limp mode, misfire, and possibly damaging spark plugs and your motor. Lots have gone through this, especially in winter.

FMIC is a great upgrade for summer, but it's only to recover lost hp from heatsoak.

You can throw in thousands of dollars on bolt-on parts, but it will only make 10whp at most.
Stock makes 210-220whp.
Stock with 93 occtane makes 220-230whp.
Stock with full bolt-ons(intake, downpipe, midpipe, catback, fmic, you name it) can make up to 240whp.
Stock + LAP3 ECU tune stage 1 will get you to 270WHP
Stock + LAP3 ECU tune stage 1.5 will get you to 280WHP
LAP3 Stage 1.5 ECU tune and HFC/Catless will get you up to 290WHP
LAP3 Stage 2 ECU tune which requires HFC/Catless will get you 300-315WHP
LAp3 Stage 2.5 ECU tune will get you up to 325WHP.
There's a lot you can do to make power, but without ECU tuning, you won't see much of gain.
 

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2015 Kia Optima
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Discussion Starter #17 (Edited)
Thanks for the info. From what Ive read so far ,this is what's most probably going in my car:
Lap 3 tune, 3"downpipe (these 2 together) then fmic and lastly 2.5" catback. How does that look?
Edit:

After posting this post I went reading and found conflicting information.
Dynoed results with 3" turboback are
35.5 HP increase and a decrease of 2.4ft-lbs of torque*....
 

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Thanks for the info. From what Ive read so far ,this is what's most probably going in my car:
Lap 3 tune, 3"downpipe (these 2 together) then fmic and lastly 2.5" catback. How does that look?
Edit:

After posting this post I went reading and found conflicting information.
Dynoed results with 3" turboback are
35.5 HP increase and a decrease of 2.4ft-lbs of torque*....
Yes, you get the 35.5hp gain and 2.4ft-lbs loss from 3” turbo back, but if you look you’ll see that you’re best bet is 3” down pipe to 2.5” cat back like you stated. Remember “HP sells cars, Torque wins races!”
 
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