Manifold queries!

[Yezinki]

My Corolla’s engine is 1ZZ-FE done 13K.

I want to replace it stock Manifold & exhaust setup.

I have a few questions, do keep in mind I’m a noob newbie when it comes to mod.

1. Manifold & Headers are different names of the same part?

2. Manifold consists of intake & exhaust headers?

3. Can one replace the stock intake headers only, by race long running intake headers using the stock Manifold……if yes……the pros & cons of that?

4. If supposedly yes than it can handle both aspirated & charged engines?

5. If no should than go for a charged manifold replacing the stock?

6. Does changing the stock Catalytic convertor, muffler, inlet increase from 2 to 2.25” help in performance?

7. What role of resonator & does the 9th Gen Corolla has one?

8. Which company manufacturers the best of these products…PPE, JP?

9. My aim is it to replace the stock once only, not changing each time with another mod.

10. Do you think it’s a good investment?

11. What approx WHP & Torque would I gain?

Thanks.

[MR2Jedi]

Originally Posted by Yezinki

9. My aim is it to replace the stock once only, not changing each time with another mod.

.

Then you need to decide whether your gonna go with normally aspirated or forced induction before you do anything else.

Choices:
1.) Normally aspirated
2.)TurboCharged
3.) Supercharged

[Yezinki]

MR2Jedi,

You have given 3 choices.

The answer to them might sound ridiculous, as stated earlier am noob when it comes to mod.

I wanna go with a 4th choice… is that possible…i.e. both normal aspirated & charged…….cause I have no clue if I go with forced induction where would the mods end…..they might end up more than the price, what I paid for this vehicle?

Thanks again.

[NMGeorge]

I'd just drive the 328i Our Corollas make great daily drivers - but there are much better platforms available to mod. If I wanted a sporty small 4 door, there'd be a WRX in my garage... But, to each their own.

Have fun,

[XR2003]

1) yes

2) no, there are differences. Intake manifold involves the air going IN to the engine for combustion. Exhaust manifold involves the fumes EXITING the engine after the combustion process is completed.

3) Not likely, Toyota made the intake manifold out of plastic due to less heat soak - meaning less heat absorbed into the material. Older 1zz motors had metal intake manifolds.

I suppose if you had the money to design and create a custom intake manifold - you can.

4) No - Forced Induction engines need different air and fuel needs as compared to N/A motors.

5) Only if you plan to go forced induced later - it would be way too expensive to go back & forth from N/A to forced induced (charged).

6) It does help, though you want to get mandrel bent piping and not crush (pressure) bent piping. Smoother flow = better performance in power and even in fuel mileage if you are able to discipline yourself from stomping on the throttle.

7) The 9thgen Corolla does have a resonator. It is there is keep the exhaust sound from being too loud, it works in accordance with your stock muffler.

8) Best exhaust header? It depends on what you want to do. Dc header, JP (might be discontinues), and PPE.

In terms of horsepower overall - PPE.

9) Then decide BEFORE doing ANYTHING - are you going to stay N/A or will you do forced induction? Keep in mind if you do go "charged" aka forced induction - you will need the necessary ECU via piggyback or standalone Engine Management system to control the A/F ratio and not to mention that on top of that expect to double the cost on just "tuning" the engine to work with the turbo. Don't forget all the other parts involved like the intercooler, the I/C piping, the months the Corolla will be not in service for all this to be installed and tuned.

10) Personally, I think it would be more cost effective to keep the Corolla N/A with a few mods and use it as your daily driver. If you really want great performance car, look elsewhere for a car that is already OEM performance oriented from the factory.

11) Can't answer this question as we do not know what route of performance you will go.

[Yezinki]

MR2Jedi & XR2003

Thanks for your very detailed replies.

I appreciate your taking the time out to reply to each.

So in a way there are 2 manifolds…….intake & exhaust?

BTW PPE is offering an intake manifold for both N/A & charged?

After a reading them & agreeing to your suggestions I plan keeping my Corolla N/A……now what would be your answers.

Thanks again.

Originally Posted by XR2003

6) It does help, though you want to get mandrel bent piping and not crush (pressure) bent piping. Smoother flow = better performance in power and even in fuel mileage if you are able to discipline yourself from stomping on the throttle.

XRS2003 what's the difference mandrel bent vs crush bent piping?

Thanks.



Reasons for not going for a different vehicle/platform:

1. My 9th Gen corolla might be 06, but has done only 13k very well maintained , feels like is just out of the dealership. Cause either am out of the state in the mainland or out of the country due to the nature of my profession.
2. It’s my 2nd ride; my BMW does most of the running & needs no mods.
3. As far as performance entirely with stock & no mods, it’s great. Top speed clocked is 125 mph, 0-60 haven’t measured accurately but defiantly less than 10 secs.
4. Average FC city/highway, mixed with occasional my style of high rev driving gives me 33.7 MPG…….high way only & below 100 gives me 45MPG eaily.
5. I was & am thinking of learning to mod on this till it does some more Ks before I change it
6. It’s a very reliable car never has let me down & have some personal attachments too.
7. To summarize it’s true that I can just go buy a WRX that’s a smart thing……but my thinking is to learn to mod.

[MR2Jedi]

I don't know how much aftermarket performance support there is for the Corolla 1ZZ.
To get more power for an N/A :
Freer flowing intake
Header
Freer Flowing Catback Exhaust
High Compression Pistons and Rings
High Lift Cams with adjustable cam gears
Higher Tension Valve Springs
Titanium Retainers
Over Sized Valves (1mm)
Larger Fuel Injectors(possibly larger fuel to acommodate injectors)
High Capacity Fuel Pump

[Yezinki]

Should I purchase the Intake manifold(Black ceramic), Complete exhaust setup 2.25” inlet ( includes Catalytic Convertor, resonator , muffler & mid piping) from PPE for $ 1,860…….black ceramic coat for header, mid pipe & muffler costs a $460 more which is included……approx gain is 15WHP & 7-8 lbs*ft of torque.

Muffler tip is similar to stock, tipped down, aint that flashy.

OR

Buy the Intake manifold from PPE & exhaust setup from Magnaflow…..but Magnaflow does not manufacture catalytic convertor.

Hoping to hear your experienced thoughts?

[GTurner598]

pp3 doesnt make an intake manifold. they have a race header and a supercharged header. there is a intake manifold in the making for the 2zz guys but there was talk of a 1zz intake manifold but they need like 20 people to put a certain amount of money down to begin production and nobody had the cash.

[Yezinki]

Correct GTurner598…….my mistake used the wrong term…….yes long race header, which even supports a TRD supercharger……would that fit in the stock manifold?

[MR2Jedi]

Originally Posted by Yezinki

Should I purchase the Intake manifold(Black ceramic), Complete exhaust setup 2.25” inlet ( includes Catalytic Convertor, resonator , muffler & mid piping) from PPE for $ 1,860…….black ceramic coat for header, mid pipe & muffler costs a $460 more which is included……approx gain is 15WHP & 7-8 lbs*ft of torque.

Muffler tip is similar to stock, tipped down, aint that flashy.

OR

Buy the Intake manifold from PPE & exhaust setup from Magnaflow…..but Magnaflow does not manufacture catalytic convertor.

Hoping to hear your experienced thoughts?

Thats alotta money for 15hp and an un noticeable amount of torque. I'm not comfortable telling you what to spend your money on, but I would rather spend twice that much and go turbo. Much more HP for the money and way more upgradeable down the road.

[Yezinki]

MR2Jedi,

You have all the right to suggest/recommend since I have blind faith & trust in your abilities.

I plan starting a new thread regarding mods of all sorts & hope that you shall guide me with your vast experience.

Lastly would you care to reply to my thread Zeroing questions?

Regards,

Yezinki.

[GTurner598]

well if you got the s/c header when you are N/A you might even see a loss in power. I think you should find a shop and get your stock exhaust manifold bored out. it would prob be cheaper and net more gains than a dc or jp header.

[Yezinki]

Any one selling a TRD S/C ……..how can one bore a stock manifold……..I mean dimensions’, specs …..bore to what value from the stock?

[GTurner598]

there a 3 for sale on 9thgen. i dont know about boring though. iv never had it done but i have seen some dynos from them and they gain jsut about the same as a dc header but like 1-2 whp more.