Intake, Header, HFC, CBE = Too Lean?

Smallywood

Anyone running all 4 items? I hear that if you run all 4 parts you will lean the car out too much. Any feedback from members running or that have tried this set-up?

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NewlyIMPORTed

idk alot of people are running HFC CBE CAI though im curious to find this out too

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2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

spearfish25

Stillen guys told me that all 4 will make you run too lean. Thus, you'll need a tune.

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2013 Cadillac V-Wagon, RIP Z

NewlyIMPORTed

are you fine just running three though? haha

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2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

spearfish25

According to them, yes. Three is fine, four is not without a tune.

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2013 Cadillac V-Wagon, RIP Z

Zsteve

when I first got my car the exhaust would get some black gook on the intake tips, I guess it was running a tad rich but after the CBE and K&N drop ins, no black gook so Its running a little lean just with that. Cobb access port on the way, wed maybe.

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2010 LS3 C6 Silver coupe corvette

NewlyIMPORTed

dang i guess after I install the agency power exhaust i will be getting a tune

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2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

Supergoji

i thought the all powerful nissan ecu would add fuel when needed?

kannibul

To a point, like most ECU's.

F.I. Inc.

I have done extensive dyno testing and I can tell you with our headers and CBE the car does not run too lean. However, when you throw Stillen Gen III intakes into the equation it will need a re tune. The A/F will be way out of whack and in the mid to high 13 ratio!

Just to prove my point about not being too lean look at the A/F dyno chart here. This dyno chart is from my LTH thread. You can see the comparison between our HFC/CBE vs. our LTH's/CBE:



One more thing I would like to add. From just a performance standpoint, I feel that any aftermarket intake for this car is a WASTE of money. From all of the dyno testing we have done, the gains have been very minimal and in most cases next to none! I have dyno charts that shows a car losing mid range power and some torque in trade of 3 horsepower up top. For $500+ and the time or money to install it, I feel that you can spend your money elsewhere. Buy the K&N drop ins and call it a day!

If anyone has any questions comments or concerns PLEASE do not hesitate to ask. I can show dyno charts with many different combinations. What I can tell you is that the stock intakes do the job just fine... even with long tube headers installed.

Thank you,

Tony

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Xan

How come some threads and also Stillen are claiming impressive gains from the G3?

m4a1mustang

That's over stock, so they aren't going to show those high gains on a car that's already got exhaust mods done.

I'll take the other side and say they ARE worth it if you stay N/A as they help you eek out that last bit of power for your dyno numbers and sound really cool, but even with 18 whp gains over stock, you'll never feel it. Just look at that Stillen graph... the stock air boxes are super efficient 'til nearly redline (I think the stock pull on that Stillen graph is a little misleading -- it shouldn't fall flat on it's face like that at 6.5K) so the gains you see on paper can't really be felt because they're at the very end of the rev range.

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F.I. Inc.

The numbers are impressive with a stock exhaust! Look at the numbers, this is a stock baseline. So the Stillen intakes uncork power in a stock exhaust application. Congratulations to all of those who are running around with a stock exhaust and Stillen Gen III intakes. I know I am sounding a little hostile and for coming off that way I apologize to you ahead of time!

The bottom line (dyno proven) once you change the exhaust system you free up the almost all of the power & torque. (I said almost all) Then you do the intakes, you will see they are not doing much of anything until close to 7000 RPM's! Like I said, I have seen cases where you lose some low end and mid range. We all know usable power is 3500-6800 RPM's, not 7000-7300!

Thank you, Tony

You took the words right out of my mouth...

Tony

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Nikon FM

Nice thread!

I'm running the Res Test pipes with the CBE (both F. I.) including K&N filters. If I was to go to the long tube headers there may be a too lean scenario? Getting a tune then would be the fix and provide a nice addition down at the mid + RPM range?

I'm curious how much more a tune would provide with my current set up as well.

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drisko

I have a feeling once COBB finalizes the VVEL tuning aspect of the accessport, an intake will definitely be a worthwhile modification, since the motor in theory should be able to take in more air at the top end (assuming Nissan does not already have the cams at maximum lift).