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HO exhaust manifold on a Renix


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I am trying to figure out if a HO exhaust manifold will fit on a Renix head. I understand that it will not have a bung for the EGR or the O2 sensor. The O2 sensor will mount in the new HO down pipe. I understand a bung would have to be added for the EGR. I am trying to figure this out because I need a new exhaust and a new manifold. The HO manifolds are cheap and have the bellows. The renix manifolds are about $100 more. I am going to replace the down pipe either way so if the HO manifold works it's just cheaper. I am also going to add in an extra piece of flex pipe when I do the exhaust. Wondering if anyone had actually done this? 

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12 hours ago, jeeptec1 said:

The exhaust ports are different. Don’t waste your time


Sent from my iPhone using Tapatalk

Not true at all. Bolts right up.

 

HO exhaust manifold on Renix

As far as exhaust, you can use the Renix exhaust manifold and be fine.
If you want to use the HO exhaust manifold, you must go with an HO headpipe and screw your O2 sensor into that headpipe. Standard Renix harness is plenty long to do so.
A bung can be welded into the HO manifold to accept the EGR tube also.
 

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23 minutes ago, cruiser54 said:

Not true at all. Bolts right up.

 

HO exhaust manifold on Renix

As far as exhaust, you can use the Renix exhaust manifold and be fine.
If you want to use the HO exhaust manifold, you must go with an HO headpipe and screw your O2 sensor into that headpipe. Standard Renix harness is plenty long to do so.
A bung can be welded into the HO manifold to accept the EGR tube also.
 

Thank you. 

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  • 3 weeks later...

If anyone ever comes back to this the answer is yes. You need a HO head pipe and round the corner in the intake.

IMG_20190611_151407337.jpg.03cd67402962f6a4bb34ad56c290f15d.jpg

Use the renix gasket so the intake lines up. The exhaust ports are identical.

IMG_20190611_151428194.jpg.553628fec0fbf38396ce0399db155a60.jpg

Renix on top HO on bottom.

IMG_20190611_153216513.jpg.95990d9124432c6b2051999495afdf9d.jpg

They sure look different.

IMG_20190611_175729159.jpg.7f7a3e37e321530d96330d0b9cd0675d.jpg

HO head pipe for the O2 sensor bung and different drop location. You will have to deal with the EGR pipe.

IMG_20190611_145901205.jpg.8d3bfe23646d711768084070321f9fda.jpg

I just deleted the EGR.

IMG_20190610_121710025.jpg.a8d569c882d205bd9b55e5317d40857f.jpgPlate for the valve and plug for the pipe hole.

IMG_20190611_153137387.jpg.69b24f07ae0230193e7e45b8a019dbe4.jpg

Round both bottom corners.

IMG_20190611_153127436.jpg.8775282659f2ceb557b4081c88206527.jpg

Just a little.

IMG_20190611_174341195.jpg.9f84d89a728da51b758f74c4ffd73c17.jpgHO manifold on a Renix!

 

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On 5/22/2019 at 8:18 AM, cruiser54 said:

Not true at all. Bolts right up.

 

HO exhaust manifold on Renix

As far as exhaust, you can use the Renix exhaust manifold and be fine.
If you want to use the HO exhaust manifold, you must go with an HO headpipe and screw your O2 sensor into that headpipe. Standard Renix harness is plenty long to do so.
A bung can be welded into the HO manifold to accept the EGR tube also.
 


So the o2 senseor seem easy enough..... If someone did not have the tools to weld, could the EGR just be be deleted entirely?

Which sucks because I just replaced all the vacuum lines with new tubing, including the egr lines   :doh:

Literally the only headers that I can find for Renix jeeps is the Pacesetter set and I have heard mixed reviews at best about those...
 

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3 hours ago, Ryno said:


So the o2 senseor seem easy enough..... If someone did not have the tools to weld, could the EGR just be be deleted entirely?

Which sucks because I just replaced all the vacuum lines with new tubing, including the egr lines   :doh:

Literally the only headers that I can find for Renix jeeps is the Pacesetter set and I have heard mixed reviews at best about those...
 

Yes you can delete the EGR if you're not worried about passing emissions.

IMG_20190610_121710025.jpg.fcfad64b1f91107e8c3fd696be5ceaa7.jpg

Doorman part #090-061 plug for the intake.

Route66mods.com part#70978 

https://www.route66mods.com/product/jeep-egr-delete/

IMG_20190611_145901205.jpg.cf224f56a2b3025413392b288d28e588.jpg

This is both parts installed.

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17 hours ago, Ryno said:


So the o2 senseor seem easy enough..... If someone did not have the tools to weld, could the EGR just be be deleted entirely?

Which sucks because I just replaced all the vacuum lines with new tubing, including the egr lines   :doh:

Literally the only headers that I can find for Renix jeeps is the Pacesetter set and I have heard mixed reviews at best about those...

 

Yes, it can be deleted. 
 

 

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So this question may need to go to a separate thread...
 but wouldn`t deleting the egr lead to running richer? Less recycled exhaust gas mean more air? Slight power gain but slightly worse fuel economy?
I`m still learning in and outs, just curious what everyone else thinks.

If there is a big difference, I`ll take the time to learn to weld and buy equipment....(eventually, probaly should anyway) and do it "properly" .

If not, i`ll grab me a new header this weekend or next and plug that hole up and be done with it.

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RENIX ECU knows when EGR is requested and cuts back on INJ PW during that time. So actually without EGR engine goes lean (these are very short time durations). ST/LT fuel trims should compensate for this.

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  • 10 months later...

Hello all.

Has anyone installed the ERG bung on the HO exhaust? Part numbers, order info, installation details, etc.?

Also, any custom fitting required to the Renix intake to match up with the HO exhaust manifold?

Much appreciated.

 

AVjeeper

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Just now, AVjeeper said:

Hello all.

Has anyone installed the ERG bung on the HO exhaust? Part numbers, order info, installation details, etc.?

Also, any custom fitting required to the Renix intake to match up with the HO exhaust manifold?

Much appreciated.

 

AVjeeper

Bolts right up to the head. MAY have to do minimal filing on the intake manifold. No biggie. 

Intake filing.jpg

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28 minutes ago, BeatCJ said:

Does moving the O2 sensor further down stream affect how it reads? It wouldn't be difficult to add a bung for that onto the manifold/header, too.

Your choice. 91 and later stock location is fine.

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1 hour ago, BeatCJ said:

Does moving the O2 sensor further down stream affect how it reads? It wouldn't be difficult to add a bung for that onto the manifold/header, too.

Mine works great on the HO position and the factory wiring reaches no problem.

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And the EGR delete doesn't seem to be a problem?

 

I don't need to do anything right now, this is the first 4.0 I have ever driven WITHOUT an exhaust leak, just collecting information.

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