Coolant to Plenum Delete - ZR-1 Net Registry Forums

threestar40 · 01-14-2007

Can anyone direct me to advice on how to do the coolant to plenum delete mod?

The diagrams in the factory service manual and the ones posted here don't show enough to see EXACTLY how to redirect.

I think that is a very cool mod and being from Texas, I'm sure I don't "need" it. It sucks to have to deal with coolant when pulling the plenum.

Thanks in Advance,

Rick =)

Kevin · 01-14-2007

if you're talking about the TB bypass, all you need is around 4 feet of hose and I think 5/16ths rubber nipples, hose clamps, and zip ties.

threestar40 · 01-15-2007

I'm talking about bypassing the entire plenum. Not just the throttle body.

Rick

jonszr1 · 01-16-2007

The best way to do it is the way the first post said . i would be afraid of steam pockets unless you pull the inj housings and the benifit just isnt there. you would do better getting one of the 170 thermastates . jmho

ZR1 MK · 01-17-2007

I have the plenum plates, but I dont see why you cant tap and plug the passage holes.

jonszr1 · 01-17-2007

the problem is without flow ,air will get trapped. think about it air goes to the top, but with no flow it gets trapped and once the engine gets warm you get steam pocket which can create more heat than the coolant. I you listen to what those that have a lot more knowledge on these motors than you are trying to tell you . ITS NOT WORTH THE TROUBLE. since you are in texas call Corey henderson in New Braunfells (210 8676286 he is one of the 5 most knowledgeable people in the country on these motors . Maybe you will believe him when he tells you that if you want to bypass the throttle body it gives you absoultly no power gain at all. Moving the MAT sensor to the air dam will do more good and is easier.. the temp inside the engine compartment will conteract your attempt at heat reduction. I know what your thinking but I tried it and saw no gain. In the end its your car do what you want . and find out for yourself. jmho

01-14-2007	#1
threestar40 Join Date: Jan 2005 Posts: 150	Coolant to Plenum Delete Can anyone direct me to advice on how to do the coolant to plenum delete mod? The diagrams in the factory service manual and the ones posted here don't show enough to see EXACTLY how to redirect. I think that is a very cool mod and being from Texas, I'm sure I don't "need" it. It sucks to have to deal with coolant when pulling the plenum. Thanks in Advance, Rick =) Last edited by threestar40; 01-14-2007 at 12:36 PM.

01-14-2007	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: Coolant to Plenum Delete if you're talking about the TB bypass, all you need is around 4 feet of hose and I think 5/16ths rubber nipples, hose clamps, and zip ties. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

01-15-2007	#3
threestar40 Join Date: Jan 2005 Posts: 150	Re: Coolant to Plenum Delete I'm talking about bypassing the entire plenum. Not just the throttle body. Rick

01-16-2007	#4
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Coolant to Plenum Delete The best way to do it is the way the first post said . i would be afraid of steam pockets unless you pull the inj housings and the benifit just isnt there. you would do better getting one of the 170 thermastates . jmho

01-17-2007	#5
ZR1 MK Join Date: Aug 2005 Location: NY Posts: 143	Re: Coolant to Plenum Delete I have the plenum plates, but I dont see why you cant tap and plug the passage holes. __________________ Mike 427 cu in LT5 [URL="http://zr1mk.weebly.com"]http://zr1mk.weebly.com[/URL]

01-17-2007	#6
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: Coolant to Plenum Delete the problem is without flow ,air will get trapped. think about it air goes to the top, but with no flow it gets trapped and once the engine gets warm you get steam pocket which can create more heat than the coolant. I you listen to what those that have a lot more knowledge on these motors than you are trying to tell you . ITS NOT WORTH THE TROUBLE. since you are in texas call Corey henderson in New Braunfells (210 8676286 he is one of the 5 most knowledgeable people in the country on these motors . Maybe you will believe him when he tells you that if you want to bypass the throttle body it gives you absoultly no power gain at all. Moving the MAT sensor to the air dam will do more good and is easier.. the temp inside the engine compartment will conteract your attempt at heat reduction. I know what your thinking but I tried it and saw no gain. In the end its your car do what you want . and find out for yourself. jmho