Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Garage > 4 Cylinder

Notices

K&N Intake 2.7L 4cyl

Reply
 
Thread Tools Search this Thread
Old 09-14-2013, 03:59 PM   #1
Junior Member
Tacoma4x4banger is on a distinguished road
 
Tacoma4x4banger's Avatar
Name: Danny
Joined: Sep 2013, #112397
Location: Colorado
Gender: Male
Posts: 10
Tacoma4x4banger's Tacoma Gallery
K&N Intake 2.7L 4cyl

Anyone have a K&N intake on there 2.7L? I'm doing some mods and to my 2013 2.7L auto 4x4 and I'm curios if the K&N is really worth it. I'm getting 265/75-16 BFG AT's with 16x8 alloy wheels with the ProComp ProRunner shocks and struts with the 2.5in front height lift adjustment. Will the intake help compensate for the added tire size and weight?
  Reply With Quote
Old 09-14-2013, 09:55 PM   #2
Senior Member
bama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shedbama trd is one of the sharper tools in the shed
 
bama trd's Avatar
Law Enforcement:
Joined: Mar 2010, #34371
Location: Alabama
Gender: Male
Posts: 262
bama trd's Tacoma Gallery
I purchased my 2003 2.7L x-cab 4x4 with a K&N cold air induction already installed, so I can't compare to what it's like without it. One thing is , I can here that K&N cone filter sucking some air, when I rev.
  Reply With Quote
Old 09-14-2013, 10:55 PM   #3
play every day
tooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shed
 
tooter's Avatar
Army: CH47 Chinook mechanic
Name: Greg
Joined: Apr 2013, #102021
Location: Los Angeles
Gender: Male
Posts: 2,142
tooter's Tacoma Gallery
Quote:
Originally Posted by Tacoma4x4banger View Post
Anyone have a K&N intake on there 2.7L? I'm doing some mods and to my 2013 2.7L auto 4x4 and I'm curios if the K&N is really worth it. I'm getting 265/75-16 BFG AT's with 16x8 alloy wheels with the ProComp ProRunner shocks and struts with the 2.5in front height lift adjustment. Will the intake help compensate for the added tire size and weight?
With the 2.7, no intake could possibly compensate for the larger diameter and heavier rotating weight of bigger tires. However, gearing your final drive lower would definitely resolve the issue.
  Reply With Quote
Old 09-14-2013, 10:58 PM   #4
Senior Member
Rich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shed
 
Rich91710's Avatar
Name: Rich
Joined: Feb 2012, #73470
Location: Los Angeles
Gender: Male
Posts: 16,682
Rich91710's Tacoma Gallery
Not worth it.
Makes more noise, so the psychological effect is it makes more power, but it doesn't, and the K&N filter does not filter as well as stock.
  Reply With Quote
Old 09-14-2013, 11:25 PM   #5
DerpWerx Fab
SingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shed
 
SingleCabGuy's Avatar
Name: Kase
Joined: Mar 2012, #75753
Location: Columbus/Waco,Tx
Age: 20
Gender: Male
Posts: 28,737
SingleCabGuy's Tacoma Gallery
Quote:
Originally Posted by Tacoma4x4banger View Post
Anyone have a K&N intake on there 2.7L? I'm doing some mods and to my 2013 2.7L auto 4x4 and I'm curios if the K&N is really worth it. I'm getting 265/75-16 BFG AT's with 16x8 alloy wheels with the ProComp ProRunner shocks and struts with the 2.5in front height lift adjustment. Will the intake help compensate for the added tire size and weight?
I have a k&N CAI on mine for testing. Throttle response is slightly better than stock but overall speed (0-60mph and 1/4 mile time) is slower than stock. I keep it for the noise anyway and the loss of power is worth it IMO. With stock exhaust after 3,500RPM the CAI gives the engine a loud deep sound.
  Reply With Quote
Old 09-14-2013, 11:57 PM   #6
Senior Member
worthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shedworthywads is one of the sharper tools in the shed
 
worthywads's Avatar
Joined: Jun 2011, #58841
Location: Peoples Republic of Boulder
Gender: Male
Posts: 3,124
worthywads's Tacoma Gallery
^ wut?
  Reply With Quote
Old 09-15-2013, 12:38 AM   #7
DerpWerx Fab
SingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shedSingleCabGuy is one of the sharper tools in the shed
 
SingleCabGuy's Avatar
Name: Kase
Joined: Mar 2012, #75753
Location: Columbus/Waco,Tx
Age: 20
Gender: Male
Posts: 28,737
SingleCabGuy's Tacoma Gallery
Quote:
Originally Posted by worthywads View Post
^ wut?
I know it sounds weird that throttle response feels better yet the truck is actually slower but it's just the truth.
  Reply With Quote
Old 09-15-2013, 08:54 AM   #8
Junior Member
Tacoma4x4banger is on a distinguished road
 
Tacoma4x4banger's Avatar
Name: Danny
Joined: Sep 2013, #112397
Location: Colorado
Gender: Male
Posts: 10
Tacoma4x4banger's Tacoma Gallery
Cool, Thanks guys! I was worried about it possible ingesting water anyways, the open design just seems like it would be more prone to sucking up water. Especially with the amount of rain we have been getting here in Denver. I'll save the money and stick with the stock intake. Gracias Taco Amigos!
  Reply With Quote
Old 09-15-2013, 09:43 AM   #9
play every day
tooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shed
 
tooter's Avatar
Army: CH47 Chinook mechanic
Name: Greg
Joined: Apr 2013, #102021
Location: Los Angeles
Gender: Male
Posts: 2,142
tooter's Tacoma Gallery
Quote:
Originally Posted by SingleCabGuy View Post
I know it sounds weird that throttle response feels better yet the truck is actually slower but it's just the truth.
You just offered a very useful piece of information concerning intakes,
as your drag runs are as valid as dyno test results.

I don't think that my Injen intake helped my engine either as the A/F on the dyno runs was really lean. When I removed the stock intake I took some careful measurements and found that the inside diameter of the throttle body bore is exactly 61mm, and the inside diameter of the intake air horn at the other end in the fender well is also exactly 61mm. This 1 to 1 relationship of the intake's entry to throttle body bore must be critical for the ECU to meter a good A/F ratio under full throttle conditions.



So I'm going to make a 61mm inside diameter ring and insert it right at the mouth of the Injen intake to restrict the opening enough to richen up the mixture at wide open throttle.
  Reply With Quote
Old 09-15-2013, 07:39 PM   #10
Senior Member
chriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shedchriss is one of the sharper tools in the shed
Name: chris
Joined: Jun 2010, #38206
Gender: Male
Posts: 100
chriss's Tacoma Gallery
Quote:
Originally Posted by tooter View Post
This 1 to 1 relationship of the intake's entry to throttle body bore must be critical for the ECU to meter a good A/F ratio under full throttle conditions.




Not true. As everyone that has modified their stock airbox can attest, this is not critical. Only the section of the intake that contains the mass air flow sensor is relevant to measurement or mixture ratios.
  Reply With Quote
Old 09-15-2013, 08:01 PM   #11
play every day
tooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shed
 
tooter's Avatar
Army: CH47 Chinook mechanic
Name: Greg
Joined: Apr 2013, #102021
Location: Los Angeles
Gender: Male
Posts: 2,142
tooter's Tacoma Gallery
Quote:
Originally Posted by chriss View Post
Not true. As everyone that has modified their stock airbox can attest, this is not critical. Only the section of the intake that contains the mass air flow sensor is relevant to measurement or mixture ratios.
I understand what you're saying, as all of aftermarket intakes are restricted in exactly the same way by the required diameter of the MAF sensor.

My Injen uses oversized tubing and necks down to the proper size right at the MAF sensor...



then returns to the larger diameter until it necks down again right at the throttle body...



However the intake diameter at the air filter end of the tube is quite a bit larger than the stock intake which makes the Injen intake overall less restrictive at wide open throttle. Here's the dyno run A/F chart. In both runs I used exactly the same intake, and as you can see, they're both running way lean.






So I'm going to reduce the opening at the air filter to match the bore of the throttle body exactly like the air horn on the stock intake.
  Reply With Quote
Old 09-15-2013, 09:34 PM   #12
Senior Member
Rich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shed
 
Rich91710's Avatar
Name: Rich
Joined: Feb 2012, #73470
Location: Los Angeles
Gender: Male
Posts: 16,682
Rich91710's Tacoma Gallery
Quote:
Originally Posted by tooter View Post
My Injen uses oversized tubing and necks down to the proper size right at the MAF sensor...

then returns to the larger diameter until it necks down again right at the throttle body...
Which causes an increase in velocity at the MAF and TB, but the total volume remains unchanged.
Restricting the tubing at the filter will simply place another velocity change into the system, but will not improve flow.

If this were a carb'd system and the velocity changes were post-carb, this would be a bad thing because the fuel would drop out of suspension when the tubing flared out beyond the MAF and the velocity dropped.

In this case, the velocity at the MAF and the velocity through the TB are identical, whether the tubing ahead of the MAF and behind the MAF is 61mm or 610mm. The expanded tubing provides a bit of a buffer... almost acting as a capacitor, so the MAF does not "see" small fluctuations in flow at the TB... enlarging the tubing between the MAF and TB would increase that effect... I'd say with a 70mm tube you'd start seeing some serious mixture issues caused by the capacitive lag between the TB and MAF.

Adding a restriction ahead of the MAF will only serve to increase the overall restriction of the intake.
The multiple bends and chambers in the stock snorkel, the ridges in the flexible coupling, and the intersection in the stock resonator chamber introduce more restriction via turbulence than the stock 61mm snorkel inlet diameter.

The magic is in the flow velocity at the intake port, which you have addressed with the 2" spacer.
  Reply With Quote
Old 09-17-2013, 11:08 AM   #13
play every day
tooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shedtooter is one of the sharper tools in the shed
 
tooter's Avatar
Army: CH47 Chinook mechanic
Name: Greg
Joined: Apr 2013, #102021
Location: Los Angeles
Gender: Male
Posts: 2,142
tooter's Tacoma Gallery
In addition to diameter reduction, flow restriction is also a function of the length of the diameter reduction.

Ask any plumber which flows better... 10 feet of half inch, or 100 feet of half inch.
  Reply With Quote
Old 09-17-2013, 06:37 PM   #14
Senior Member
Rich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shedRich91710 is one of the sharper tools in the shed
 
Rich91710's Avatar
Name: Rich
Joined: Feb 2012, #73470
Location: Los Angeles
Gender: Male
Posts: 16,682
Rich91710's Tacoma Gallery
Quote:
Originally Posted by tooter View Post
In addition to diameter reduction, flow restriction is also a function of the length of the diameter reduction.

Ask any plumber which flows better... 10 feet of half inch, or 100 feet of half inch.
Yup... and that 90 degree bend dropping into the TB "costs" as much as 10ft of straight pipe
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
OEM Intake 2.7L 4cyl, $10 SicKnd 2nd Gen Tacoma Marketplace 2 07-18-2014 10:30 AM
K&N Airfilter kit, 2.7l 4cyl. 05+ Happysmiley 2nd Gen Tacoma Marketplace 13 02-22-2012 04:57 AM
K&N Intake for the 2.7l 4cyl JEA86 Buy / Sell / Trade 3 02-07-2011 05:49 AM
WTT my K&n CAI kit for your stock intake 4cyl pyro13g Buy / Sell / Trade 11 01-21-2011 05:45 PM
Brand New K&N intake 05-08 2.7L 4cyl hondarida122 Buy / Sell / Trade 10 03-11-2009 07:54 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.