Why Dual Intakes?

Post by **CoppellStereo** » Fri Aug 24, 2007 2:01 am

I was just curious what are the pros and cons of the dual intake system, like on my 07 G sedan? it seems like if one throttle body messes up, or one air filiter gets cloged or some, what would happen?

also, if you wanted to put a turbo on, would you have to put 2 on, one for each throttle body?

just some random things i was thinking about, thanks!!

Post by **Q45tech** » Fri Aug 24, 2007 2:59 am

Nissan used dual TB back in 1990 thru 1996 on 300zx and J30 as a method to reduce restriction by 2-3% when you are looking to squeeze out that last 6-10 HP withput increasing displacement while meeting emissions [limits of mild cams].

Obviously the extra $500 they spent was the most cost effective method for the power increase.

Every cylinder flows slightly differently so having a MAF measure 3 and individually just adjust for 3 creates improvememts also.

After all individual TB and stacks are the ultimate in NA.

Make it as hard as possible to add aftermarket parts and screw up their work of art.

Post by **joe603** » Fri Aug 24, 2007 3:58 am

It does make things more difficult for FI...A twin turbo would be ok, but a supercharger would need special piping to make it work. The good thing is that you have redundancy with 2 TBs. If you have a failure with one, you won't be stranded.

Post by **Q45tech** » Fri Aug 24, 2007 4:17 am

Before being so affirmative about TB I would disco a maf and or TB to see the result.

The old [90-96] dual TB designs were mechanically coupled together and were split from a single MAF.

Post by **joe603** » Fri Aug 24, 2007 4:51 am

I don't think there is a mechanical connection between the TB's. They are drive by wire and are most likely computer controlled.

Do they still even have MAFs?? (could have went with MAP or Membrane sensor arrangement)

Post by **joe603** » Sat Aug 25, 2007 6:47 pm

Any Tech guys know for sure?

Post by **CoppellStereo** » Sun Aug 26, 2007 4:16 pm

thanks for the replys guys!

would i see any decrese in MPG if i got an intake system? i know on my old jeep, when i put the intake on it, my MPG dropped like 6mpg. it was the 4.0L on a cherokee, i was getting around 11-12 city driving normally

Post by **joe603** » Mon Aug 27, 2007 5:38 am

The only reason it would go down is due to more aggressive driving...the sound is addictive!

Post by **CoppellStereo** » Mon Aug 27, 2007 6:20 am

so you are saying i should get intakes? does it void the warranty or anything?

Post by **joe603** » Mon Aug 27, 2007 6:27 am

Get 'em! The warranty is not voided. The only thing is to not over-oil the filter elements when you clean them (after 10-20k miles or so).

FYI, the factory warranty is only invalidated when an aftermarket part causes the problem. For example, if you put on a supercharger and your engine blows, the engine is not covered...however if your power seat breaks its still covered even though you have a supercharger....make sense?

Post by **gwoods** » Tue Aug 28, 2007 11:24 am

Doesn't hurt to clean both sides of the throttle butterfly every once and a while either.

All power is made by burning fuel. You need air to burn fuel more air you can get into the motor the more fuel you can burn.

I put dual filters and 4" pipe on my Hemi ;-)

All the fastest cars have at the min dual filters..

Post by **Jacko3** » Fri May 16, 2008 1:52 pm

Gwoods:

Do you think the G-35 can be fitted with dual air filters? Do you think there will be a tendency to excessively lean out the air-fuel mixture with such a set up for a G-35?

Post by **audtatious** » Mon May 19, 2008 12:37 am

You talking the single-intake VQ35DE or the VQ35HR (which is already dual-intake)?

No reason (or easy way) to run dual filters on the DE

Post by **joe603** » Mon May 19, 2008 6:44 am

I've seen intakes that have dual paths for the G35...the only application that it was for was twin turbos. I'll try to dig up the pic....

Post by **Jacko3** » Mon May 19, 2008 7:34 am

Joe603:

I would love to see it for the DE. Wonder if it will add more power or just cause A/F mixture to be extra lean?

Post by **joe603** » Mon May 19, 2008 10:38 am

Found it!!

Post by **Sentientbydesign** » Mon May 19, 2008 10:41 am

Ask and you shall receive...

http://www.speedforceracing.co...i.php

Why Dual Intakes?

Why Dual Intakes?

Re: Why Dual Intakes? (CoppellStereo)

Re: (joe603)

Re: (joe603)

Re: (gwoods)

Re: (Jacko3)

Re: (joe603)

Re: (Jacko3)

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