Sr Emissions Mods

[fstfenx]

Hi all,
I am installing my second SR in my car, and I am trying a few different things this time. First of all, is the heater hosing under the intake manifold. I am trying to rid myself of this rats nest. There is a set of silinoids on the lower intake manifold. I think the set is called the bav or bov. (not blow off valve) It has a harness clip, two small hose nipples, and a large nipple directed to the front of the engine. I am attempting to cap that unit. Along with this I want to cap off the water intlet from the heater box and simply tap into the radiator. The unit is located directly behind the water outlet to the heater box. (these directions could be oppisite.) This also has a harness clip.

My concern is after capping those will my ecu have problems without feedback from these units. And will the engine idle well. Any help is appreciated.
thanx

[180fan]

Those long sets of hoses under the intake manifold you can't do without. They distribute coolant to different parts of the motor.

That thing you're talking about with the two little coolant nipples and the hose that runs to the front of the car, do you know what that does? That controls your idle. that controls the amount of air your motor gets when idle. It's not a BAV or BOV, it's an IACV.

The heater box tapped directly to your radiator? Do you have any idea how long a hose you'd have to run to do that? Additionally you'd have inconsistant heat. If you're planning on not running the two short heater hoses, you'll be running two long hoses and have additional tee'd sections for your coolant hoses running to and from the radiator. If you plan on removing your heater core, then sure, have the coolant hoses circulate the coolant that would go to the heater core back to the return line located not too far away.

The biggest problem with your thinking is that little bit you were thinking about with the IACV. That'll make you have serious issues. Next you shouldn't have idle issues if you leave the IACV as long as your coolant temp sensor (located at the front next to the TPS) is in-tact with the harness there to get the readings from that. However, I do have to say you're not thinking too clearly about the heater hoses or maybe you've worded them not as descriptively as you'd thought in your head or maybe I read it wrong. If you plan on clearing up coolant hoses, that's not the way to do it.

If this is your second SR, it makes me wonder what you did to make the first one your "first" sr if you understand what I'm saying. The only coolant hoses that I know of that can be removed are the ones that run to your throttle. That gets removed when you install a Greddy Intake manifold and many have done it before on FreshAlloy without any ill effects unless you live in an area where the weather gets very cold.

[spinitsidewayz!]

how does emissions work over there?

ca smog nazis!

[fstfenx]

180fan,
i thought that the greddy intake manifold did not have the mounting location for the iacv. (what does that stand for by the way) that is why I assumed that it was unnessecary emissions junk. After looking at the engine: I am noticing two nipples that would work great for a basic 1960's style heater hoses, they would be just as long as they are stock. The first one is the stock water outlet that exits the block behind the main water outlet (where the thermostat is located). The second is located on the back of this main water outlet, there is a nipple on the back of this aluminum peice. This would solve the lengthy hoses that you are concerned about. But If my car will not idle without the iacv then I will have a problem.

So are you sure that the greddy manifold does come with a mounting location fot the iacv. Oh and yes this is my second SR, the first had minimal mods, I simply like to drive my cars. Hard.

Thanx for your help, I do appreciate the response.

And by the way our emissions are pretty standard in Salt Lake.

[180fan]

the iacv mounts at the bottom of the collector for the greddy intake manifold.

IACV = Idle Air Control Valve

How could you mistaken it for emissions? It goes to the intake manifold and has a hose running from the cold pipe?

The first hose you're talking about, runs to the throttle if we're thinking about the same hose (the little one that runs to the front hooks up to the bottom of the throttle and runs next to the coolant temp sensor?). It doesn't flow enough coolant to be able to have a good functioning heater. There's also another trick your heater core can do when you're on heavy track days, set the heater to hot, and you've another small radiator. I had to do that with the Uhaul I drove from SF to LA to pick up my clip and back. Kept the uhaul from overheating before I got to the mountains. I'd say keep the heater hoses where they are as they're pretty unobtrusive and if you use new heater hoses back there you'll be good for a long time. I put some aircraft gasket tack between the hoses and the actual pipes so they'd have that super tight fit. You may want to consider that if you're looking for less maintainence down the road. Either that or getting new metal hoses made with the outlets at better locations, like under the intake manifold and have another one running to the IACV.

Emissions in CA I've gone over on NICO as to how to pass out the pipe with an SR. The info's apparently beginning to work it's way around into Zilvia and some of the ideas were taken from FA and basic understanding of how engine emissions are made.

[fstfenx]

180fan,
thanks for the info, you've helped me out a lot.

I mistook it for emissions because the 13b engine has two valves on the intake that keep it running clean. On both of my 13b's I removed those valves in order to clean up the mess. You see how I consulted you before jumping into it, smart.

Thanks again for your help.
even though i had to suffer your cynical remarks.
fstfenx

[180fan]

don't take those remarks the wrong way. just I see alot of posts like this over on NICO where I post usually and don't really care to make stuff too nice for people that I don't think at the time haven't put too much thought or research into the components and what they do. I guess I'm a bit jaded. I had alot of issues with my own SR when it was installed even though I have installed a few previous without problems, which forced me to learn alot more about the SR's engine control systems. The internals after I did a tear down of my motor and did a soft rebuild on it for greater long term reliability. I understand what you were doing, but didn't think you took too much more thought and effort in it. Don't take it the wrong way and sorry if I came off as a prick.

[fstfenx]

no big deal, i'm just not much of a passive guy so I felt i had to say something.
about the figureing it out myself, it still doesn't seem so easy to me. but this is only my second sr. all of the muscle cars i've worked on don't make it to easy either. but all's well that ends well. Now i know exactly what it is.

by the way what is nico? good forums?

thanks again
fstfenx

[180fan]

NICO = nissaninfiniticlub but yeah it's linked up with 240sx.org. I tend to post there alot more and there's alot more info up there with regards to any nissan/infiniti. If you've any more questions I'll do my best to help you out with em and hopefully without the spike in the language that you felt. There's also Fresh Alloy but those guys are notorious for being intolerant of questions like the one below.