Well, I have used the new intake manifold (2017) for this exercise. The guy that did it for me said that it actually flows really well, and has seen these numbers on bigger engine Porsches...so, looks like the intake manifold is pretty well built.

And now the 17' intake manifold will cost more

what did the honing end up costing you?

ive always tossed up the idea of doing that to the 2017 and sandblasting the outside and having it thermal coated to prevent heat soak.

They are pretty much the same as the previous plastic one. Mine will cost more for sure. :)

About 450 AUD and had it ceramic coated as well afterwards. Haven't had a chance to hit the dyno, but compared to my previous set up there is a quantifiable improvement for sure. I should get it done pretty soon!

Bump, any updates?

Have you had a chance to dyno your car with the manifold?

Mate, been very busy and completely forgotten about it. Will see if I can book it in sometimes next week!

Still going, fresh motor on the test car!

Quite update.

Fresh motor on car is good. Been getting some street tuning done, but is slow because Ecutek flashes rather slowly, and this is being done organically.

More dyno time coming soon.

Yesssss


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Glad to hear everything is going well. Patiently looking forward to updates!

where is it located the map sensor with this itb? or is it maf based? or alpha N?

So... Down time at work has me researching car parts (again) and I just discovered that CSG has a power package option. Dangerous stuff, especially since the ITBs cost as much by themselves as a full exhaust would. That being said... It is tempting. I can't help but wonder how much power you would get out of a full exhaust with ITBs and tuned for E85.

That's being actively worked on.

It won't be anywhere near as much as FI, but none of the complexity, and you'll never heat soak.

I see we have something in common.

Well, I'm one of the very few that's satisfied with stock power, but if I said I wasn't curious about more power I'd be lying. I don't need huge power, but to justify almost $8k in parts I would like to see those numbers, and some big ones.
It sucks haha

ITB's are not about hp/dollar gains, but the change in response and attitude of the engine. If hp/dollar is your objective, a bolt-on supercharger (Jackson, Edelbrock) with E85 will cost less, and double your engine output.

Oh, no doubt, but I want to stay NA if possible, and like I said, big numbers really aren't my goal. I guess I'm just trying to justify the extra cost since the ITBs cost more than the entire exhaust setup combined. I'm a cheap person by nature so my mind won't allow the splurge without justification. Response time improvement is a tempting factor since I do think the revs need to climb faster.

If you want the revs to climb faster, a light clutch setup will be the way to go. Specifically, an OS Giken.

ITBs dramatically change throttle response.

Try giving your throttle pedal a large momentary blip, and observe the delay between stepping on the throttle, and the revs climbing.

It's an auto, so no clutch haha

But I know the lag you're talking about. Getting rid of that is tempting, but I'm not sure if it's worth $3500. I'll keep it tentative for now and definitely will keep following this for more info. The more info I can get the better.

And this right here is why I hate forced induction. I have never once driven a FI car that has that immediate throttle response that I crave in a fun vehicle.
If it doesn't have good throttle response, might as well slap an automatic on it and let the damn transmission sort it out.

Fingers crossed that this doesn't require a full ecu swap; I don't like having to dodge vehicle inspections 'cause the diagnostic port is a road to nowhere.

Sounds like you've never really driven FI done right!

Perhaps; I mean, I have never driven anything with a supercharger. But I'm really not sure a turbo'd engine can be made to feel acceptable to me. Always open to being proven wrong, but I'm a pretty big n/a fan. The faster the revs rise and fall the better. Make it feel as responsive as a superbike engine and I'm sold.

Which is why I'm here in the itb thread lookin' at parts that cost almost as much as a turbokit :thumbup:

Turbo is not the only way of forced induction (though even it can be made right with little to no turbo lag). Ever heard of supercharging?

LS swap

The fundamental concept of turbocharging means there will always be a delay, but that transient spoolup can be minimized.

With a proper clutch setup, a turbo will still be more responsive than a stock engine and tune that has excessive transient ignition retard.

Superchargers will have zero lag.

Thankfully, no automotive engineer on the planet gives a flying fuck what you feel is acceptable. Especially when there isn’t a single modern turbo that suffers from anything you could claissify as a lack of throttle response. Turbo cars can suffer from transient response, depending on the size of the turbo, but the throttle plate opens the second you mash the gas on pretty much all of them.
I’m going with, you just don’t know what you’re talking about. And that’s fine.
The speed with which revs rise and fall have absolutely zero to do with induction type. This is all relative to mass of the rotating assembly, including the flywheel. You’ve proven my point.
You’re free to like and dislike whatever you want, for whatever reason, but you should at least have an educated opinion.

The thing can be responsive and still slow lol. Forced induction to make power, na to make a point

I am considering the ITB with velocity stacks, however I am still wondering how can we deal with the MAF sensor missing? Is there a way to trick the ECU?

Already got an LS7 in another car, don't want to step on any toes.
If I'm swapping motors, I'd sooner just sling a bridgeported 2 or 3 rotor in there so it would rev like a madman and scare people.

Have you driven a current model STi? It does not have what I call "snappy throttle response." With throttles no longer being cable controlled, are you really getting the throttle opening you think you are? The base BRZ plays games with throttle opening to try to game that torque hole. But thats besides the point.

I'm also well aware what lighter flywheels do. I've run 9 and 11 pound units in other cars.
I don't like turbos. I prefer N/A. It's a free country.

At the end of all this, I just hope there's another useful product to spend money on.

With stock twins ecu tune/stock throttle mapping torque dip is there, i doubt there any games are played regarding that (otherwise i'd expect that to be hacked around/"fixed" by throttle remap in MY2017, as many complained about it in past for twins). But yes, throttle mapping is not linear, and judging by how it's done, imho game that is played in stock tune is to make impression of having larger engine, by actual throttle opening much steeper during first part of pedal travel. That doesn't affect so much how immediate throttle response is though, drawback being less fine low-medium open throttle control to pay for that bigger engine faking.
Still, as i already mentioned above - supercharging might be considered as option. It won't change a bit throttle response, which will same exactly same as in NA. With SC engine should behave same as NA except generating more power, like if engine had been NA but of bigger displacement (at cost of less efficiency due gearing/pumping losses from driven by engine supercharger, instead of more efficient turbocharging that is driven by recuperated energy of exhaust gases).
But imho lag of well done turbo setup that isn't concentrated on max output, but instead on little lag/quick spoolup from low rpms with single turbo optimized for low rpms or twin turbo (STI's setup is not such in my eyes, rather set for max power from engine, mostly at top) can be rather responsive, and you might be trying to avoid such too undeservedly.

There's a really easy way to find out of you're getting the throttle position you think you are. Log it.
For all else, see quoted post.

I would 100% sell my turbo kit to fund running an ITB setup. I hope they can utilize Ecutek and get everything figured out. I will be watch this thread closely. Going back to N/A would be ideal for me.

Keep your turbo AND run ITB...

No news?.

/cast rresurrection

Dont hold your breath. Theres a set of them for sale in classifieds though if you want to try em.

Where do you see ITBs for sale? Can't find them under classifieds on here.

That was over a month ago