Need Help getting power without Forced Induction

[SteveIsBored]

Originally Posted by KoolBRZ

What I meant was adding an intake WITH a header, and an OFT. A header alone gives power but cuts mileage, since the valve overlap hasn't been changed and there is less back-pressure. Since the exhaust flow is slower through the larger primaries, there is also less low-end torque. Lowering the air resistance through the intake and filter however, increase the low-end torque, helping to offset the loss of torque from the header. The OFT supplies the tune to best use the header, and in some cases, even the best MAF scale for the new intake.

It's very simple. There are no OTS tunes to reduce valve overlap to get better mileage. When the exhaust is replaced with more free-flowing exhaust it allows more power, but it also allows more unburnt fuel to flow out, because of the valve overlap. So, more power, less mileage with a free-flowing exhaust.

A free-flowing intake however, when added with a header, will only give more power, since valve overlap and back-pressure only affect the exhaust. So, if you want more power with good mileage, get an OFT, an intake and a header.

I feel the best compromise is with an OFT, an intake and a header. I personally have an axle-back also, simply for the better looks and sound. It doesn't give me a bit more power, and costs me a little mileage, since there is less back-pressure, but it sounds good when I open it up.

I think your engine is running backwards probably causing poor gas mileage

[2much]

Originally Posted by KoolBRZ

What I meant was adding an intake WITH a header, and an OFT. A header alone gives power but cuts mileage, since the valve overlap hasn't been changed and there is less back-pressure. Since the exhaust flow is slower through the larger primaries, there is also less low-end torque. Lowering the air resistance through the intake and filter however, increase the low-end torque, helping to offset the loss of torque from the header. The OFT supplies the tune to best use the header, and in some cases, even the best MAF scale for the new intake.

what in the fuck are you talking about

[SteveIsBored]

How does he know valve overlap hasn't been changed this not a fixed cam vehicle it has vvts on both cams on both banks. I'm pretty sure oft guys optimze cam angles at different engine speeds for headers etc.

[steve99]

Originally Posted by SteveIsBored

How does he know valve overlap hasn't been changed this not a fixed cam vehicle it has vvts on both cams on both banks. I'm pretty sure oft guys optimze cam angles at different engine speeds for headers etc.

all tuners adjust vvt cam tables intake and exhaust as well as many other changes to optimise fueling and ignition

[SteveIsBored]

Right I was referring to kool brz s comment about over lap and fuel economy.

[F1fletch]

I have learned a ton in the last three months and after thousands spent, let me just simply state this.....and was stated earlier too.

Good intake
Good header (I chose catted)
Axle back if you want a bit of sound
Good tune
Call it good.....the rest will just bleed you dry and leave you wanting for more.

[rx3]

Originally Posted by Shiv@Openflash

I'm pretty sure RX8 have harmonic balancers.

Well, if it does, it's not in the main drive pulley (since the drive pulley is actually just a simple one piece and relatively light part).

[donoman]

What about California guys, are there any SMOG legal headers? I don't want to pull the headers off every 2 years to pass a SMOG.

[cdrazic93]

Lol this thread.

[themajesticone]

Wow.... just read through a few comments and the cringe factor IS TOO DAMN HIGH! Many of the members here need to learn how to read and actually research the keywords they are using instead of not defining/piecing them together properly. Many many many people expect a quick answer without actually taking the time to absorb information and understand...

In general, this forum has evolved into about 95% dipshits making comments with proper keywords but are completely clueless on what they are talking about - providing misinformation on a whole other level of dumb. Back pressure this, mpg that, limp **** this, bang my head on glass that....

The other 5% are are helpful and actually provide solid information, so thanks to you - go have a beer tonight....that is where I'm headed

[Koa]

palmed my face 20x again today re-reading it

[themajesticone]

To paint a picture, this guy on the FB buy group has spent thousands on a full exhaust upgrade, wheels, tires, I think exterior and is NOW looking for a TOP OF THE LINE intake, nothing cheap here of course, but nonetheless INSISTS that he will need a tune last and doesn't want to get it yet. But he needs that cherry-on-top intake to complete his mission. grrrrrrrrrrrrrrrrrrrrrrrr

[raven1231]

Originally Posted by jflogerzi

Do not get an intake. Stock is just fine. If you after pure power Here are the 3 mods I recommend:

OFT, OFH and an axleback. Trust me, nothing else is needed for gaining power with NA. Front pipe and OP not required.

This! and even more important than all of these is E85 (w oft/ecutek) if you have access.

[Andrew025]

Originally Posted by themajesticone

To paint a picture, this guy on the FB buy group has spent thousands on a full exhaust upgrade, wheels, tires, I think exterior and is NOW looking for a TOP OF THE LINE intake, nothing cheap here of course, but nonetheless INSISTS that he will need a tune last and doesn't want to get it yet. But he needs that cherry-on-top intake to complete his mission. grrrrrrrrrrrrrrrrrrrrrrrr

The Facebook group is ridiculous.
I'd swear everyone is trollin in there if I didn't know any better with how stupid most of the posts are.