yoToco94

Hello I'm new here and I've a few questions regarding to the CAI and the Cat-back exhaust as well as a header. I've a 2013 Scion Tc Stock and well I want to get its 180 HP to at least 205 and its 173 lb torque to at least 195. I've been looking at a lot of different brands yet I don't know which to choose. Which one is better for me? I'm been looking at lot at the Megan cat back exhaust drift spec (If I get the catback, is it necessary to change the WHOLE pipe, like every single one?) and at the K&N Typhoon intake and the Weapon R Header. Are this good and reliable brands? I want sound and power, I really just want to get it to 205 max hp for now.

ashtc2

You'll never get there with cai, exhaust, and header. You would need to tune which means buying an ecu piggyback and pnp harness. Even then, I can't see those gains with bolt ons.

yoToco94

Then how much would I get without tuning?

ashtc2

I don't want to give you a number without any backing. I have those parts on my car but haven't ever dynoed it. By just driving it I can tell you this though: intake makes pshh sound, exhaust sounds nice and opens up more power when revving high in 3rd gear, and header just modifies exhaust sound. I do wonder if I got any gains though...

yoToco94

And can you tell me what brands u have? I just want to get even with 2008 Civic Si if its possible. There a few here and people are all over rubbing faces cuz they have Vtecs.

ashtc2

Injen Intake
Descendant Exhaust
Weapon R Header

I haven't raced an SI, but I imagine it being a drivers race. Get a shortshifter and a motormount to have an edge.

yoToco94

Thanks, also does it sound good with those bolt on? How is the sound?

ashtc2

It sounds really good! I get a lot of compliments because its not obnoxious.

yoToco94

Great, as fot he Exhaust, when is a cat back do Ive to hcange the whole system? Like every single pipe or I can just buy the tip and thats it? I know it would be like an axle back. But Im not sure really what is best.

o TaGGeD o

iTrader: (2)

I've got a weapon r race header with cel eliminator im selling if your in the market it's a great price less than 1k miles on it I'm just boosting my car so I don't need it I loved it the entire time I had it on and I raced a few si it was a drivers race won a few lost a few think of it this way everyone's got a honda and your tc looks much better

yoToco94

Right now I dont have the money as I started working today. xD But thanks for sharing, also what is a Cel AEiminator?

o TaGGeD o

iTrader: (2)

Check engine light so you don't throw any codes when you put a header on it throws a cel due to no cat unless you have an eliminator then your problems resolved

ashtc2

Cat back means from the catalytic converter to the back. Axel back means from the axel to the back (keeping your stock midpipe).

yoToco94

Thanks to both of you. You cleared by doubts.

Kyleptrsn1

It's nice to know I'm not the only one trying to beat an SI... haha Mind you mines on a little bigger scale. (His is supercharged with a bunch of mods) But as for what you're looking to do, just bolt ons won't get you where you're trying to get unless you tune as well. It might be worth looking into to get the most out of your car. I would recommend looking into Dezod's green header, it retains the catalytic convertor so you don't have to worry about beating the CEL.

yoToco94

Hahaha thanks for the info. Im not THAT into racing but I dont like to be all stock. Also please check my other question, maybe you can help me! I will look for that header.

o TaGGeD o

iTrader: (2)

Green can suck it lol dezod makes a great header just prefer the race header myself

Kyleptrsn1

I guess I'm confused about which question you're referring to, so I'll answer all the ones I can.
As for all the brands you mentioned, they are all very reputable brands. The only one that hasn't proven itself (in my mind) is the K&N typhoon intake. K&N makes great air filters, I've just never been sold on their intake systems.

As for how much you think you would get with out tuning? There is really no way to be sure unless you or someone else goes to do a dyno pull stock and then with the exact same parts installed (with similar dynos and weather conditions)

Another way you can help with your power to the wheels is by installing a light weight crank pulley (like the one from NST)and lightweight flywheel.

I hope I was able to answer your questions.

yoToco94

Thanks for your time. Im looking up info on Dynos here where I live to see what I can do.

Here is another question I got

https://www.scionlife.com/forums/sho...d.php?t=219852

Thanks!

russiankid

I raced a 2010 Civic Si at the track and we were dead even. At that time I just had an axle back exhaust.

As for your power, 180HP is at the crank. Take into consideration drive train loss, so on the dyno you're maybe putting 160hp to the wheels based on condition. So do you want 205hp at the wheels or just in general? Most bolt on modifications do not increase power significantly without a tune as already mentioned. Your best bet, if you want power, is to go forced induction. I have a CAI and an exhaust, it sounds cool. Exhaust opened it up a bit and CAI gave better throttle response, but overall power it doesn't feel like I gained a lot, just feels more peppier.