Cold air intake

[Jackrabbit41]

On a renix 4.0l, will a cold air intake be worth it? I'm not asking if it does anything, just wondering if I should spend the money. Thanks.

[64 Cheyenne]

No

 

Money could be more beneficial spent else wheres.

[Rockfrog]

Problem is all the cold air intakes still suck hot air being on the wrong side of the motor.

On a street driven truck, a filter and a section of 3" pipe will do the same thing, cost less and make room for other things (relocating items or just making room to work.

On a trail driven truck, they leave the filter fairly open to water ingestion, something the stock airbox is better at preventing.

Not a whole lot of power going to come from a filter though unless a lot of other things are already in place (freer flowing exhaust, Engine mods, the usual mix) . A new stock filter flows more that any stock Jeep engine is gonna suck through it.

[DirtyComanche]

It's only worth it to get rid of the stock airbox.

[benjy_26]

It makes room in the engine bay and makes a cool noise when the throttle is mashed, so there's that.

[Marine1Texas]

Cold air take is only good if you can get cold air. I used the spectre cold air intake that takes the air from the fresh air behind the fire wall. I put a small scoop and ran the ducting straight up so it gets only cold air above the hood, also a little force from driving as well. Working very good with the enlarged 62mm Renix throttle Body. I thought it may get water in it when heavy rain, however I have not gotten any water in it yet, after 5 years of using it. You can see the setup of mine by clicking on my picture link. It is the top part of the picture

[gogmorgo]

The stock intake is pretty well already a cold-air intake, pulling air from behind the headlight, not the hot engine bay. With the fancy k&n setups, the biggest benignity you'll see is down to the better-flowing ducting, and as was said you won't benefit much without other modifications to let you use the extra air. Also you'll mostly notice the benefit at or near WOT, so if you don't ever use that last quarter of the skinny pedal's travel, you won't notice much difference.

[cruiser54]

Index your distributor and have a muffler shop remove the "D" crush in your downpipe while rereouting it.

 

Use NGK plugs, Taylor wires, Napa Premium cap and rotor. The ones with brass contacts. 

[DirtyComanche]

Cold air take is only good if you can get cold air. I used the spectre cold air intake that takes the air from the fresh air behind the fire wall. I put a small scoop and ran the ducting straight up so it gets only cold air above the hood, also a little force from driving as well. Working very good with the enlarged 62mm Renix throttle Body. I thought it may get water in it when heavy rain, however I have not gotten any water in it yet, after 5 years of using it. You can see the setup of mine by clicking on my picture link. It is the top part of the picture

 

I'm guessing that intake is discontinued.  Can't seem to find anywhere that has it available.  I'm debating doing something like it with my renix setup, but it's a little more of a pain to adapt to the throttle body on them.

[Marine1Texas]

DirtyComanche, on 04 Apr 2016 - 12:33 PM, said:DirtyComanche, on 04 Apr 2016 - 12:33 PM, said:DirtyComanche, on 04 Apr 2016 - 12:33 PM, said:DirtyComanche, on 04 Apr 2016 - 12:33 PM, said:

 

Noriyori_Kudo, on 04 Apr 2016 - 06:55 AM, said:Noriyori_Kudo, on 04 Apr 2016 - 06:55 AM, said:Noriyori_Kudo, on 04 Apr 2016 - 06:55 AM, said:Noriyori_Kudo, on 04 Apr 2016 - 06:55 AM, said:

Cold air take is only good if you can get cold air. I used the spectre cold air intake that takes the air from the fresh air behind the fire wall. I put a small scoop and ran the ducting straight up so it gets only cold air above the hood, also a little force from driving as well. Working very good with the enlarged 62mm Renix throttle Body. I thought it may get water in it when heavy rain, however I have not gotten any water in it yet, after 5 years of using it. You can see the setup of mine by clicking on my picture link. It is the top part of the picture

 

I'm guessing that intake is discontinued.  Can't seem to find anywhere that has it available.  I'm debating doing something like it with my renix setup, but it's a little more of a pain to adapt to the throttle body on them.

 

yes spectre stopped making the complete kit, but you can build one your self. the filter is very available still

http://www.summitracing.com/parts/spe-99456 you can use this part then

either buy one like here http://www.ebay.com/itm/SPECTRE-9943-Cold-Air-Intake-System-97-2006-Jeep-Wrangler-TJ-4-0-6-Cyl-/231900538004?hash=item35fe596494:g:~4gAAOSwAvJXAHBd&vxp=mtr

or build your own with http://www.ebay.com/itm/Spectre-9833-Inline-Airbox-w-Cartridge-Filter-4-Housing-3-Inlet-Outlet-/311546608006?hash=item48899ff986:g:pZwAAOSwLnlWoEUQ&vxp=mtr

 

basically with part 99456, and 9833 you just add the tubing you want and take it where you want it to either hood scoop, in to firewall or run it down to pull direct cold air.

[big66440]

I made my own but removed it, I thought it was a little too loud. I didn't feel any difference in power either.

[87mjdriver]

Si did the rusty's tube/ filter adaper then had a HVAC bend up a heat shield for it. It works good but, I now commute with my truck 25 miles one way on the freeway and get tired of hearing the whistle it creates

[ScottJeep]

Running the Spectre cowl unit on my MJ. ( not my engine but the install is pretty much the same...can't post from Google images )

 

 

Only paid ~$100 off eBay for it. Has added sounds good and bad ( bit of a whistle ). As I have continued most unnecessary

EGR/Emissions/Vacuum."stuff" and average ~15 mpg with the mixed driving I do. 

The room in the engine compartment is very nice!

 

It has some issues.

Oil changes are a hassle ( oil fil is rest spot for the thing). 

With the way the Renix valve cover baffles work it seems to suck more oil thru.

It is a semi-hard connection between engine and the body seems to transmit more vibrations.

Which I think has added to/created some intake/exhaust leakage, which I have not had before.

[Marine1Texas]

Running the Spectre cowl unit on my MJ. ( not my engine but the install is pretty much the same...can't post from Google images )

 

 

Only paid ~$100 off eBay for it. Has added sounds good and bad ( bit of a whistle ). As I have continued most unnecessary

EGR/Emissions/Vacuum."stuff" and average ~15 mpg with the mixed driving I do. 

The room in the engine compartment is very nice!

 

It has some issues.

Oil changes are a hassle ( oil fil is rest spot for the thing). 

With the way the Renix valve cover baffles work it seems to suck more oil thru.

It is a semi-hard connection between engine and the body seems to transmit more vibrations.

Which I think has added to/created some intake/exhaust leakage, which I have not had before.

The reason for the tight fit on that was why I did a scoop, I was able to move it clockwise so I do not interfere with anything. I don't get the whistle, but that maybe because the scoop as well, not sure on that. 

For the oil problem I use a pcv valve on the back and the front has a breather filter. Also since it is going to a foam connection against rubber I am not getting the vibration. I thought that might happen as well.