JRciv

So I've had a JRSC kicking around in my garage for a few months and I'm finally getting around to putting it on. The only problem is that the jackson racing instructions suck ***. I hope someone can help; pics would be greatly appreciated.

So on the top of the intake manifold (the part that faces the firewall) there are two 1/4" openings. One is threaded, one is not. What goes in these holes? It looks like the un-threaded hole might be for a MAP sensor or something. I think the other one is for the boost pressure sensor. But that's another problem; since I'm using a MAP controller, I don't need the boost sensor anymore and once again I have two 1/4" openings to deal with.

JRciv

Anyone?

Jaker

The hole to the driver's side of the manifold is for the Intake Air Temperature sensor. Is you JRSC originally for the D16Y8? The other hole is for the map pressure switch. I threaded a nipple into that one, and used it to feed manifold pressure to my firewall mounted MAP sensor (89 Civic hatch).

JRciv

Okay, that makes sense. I think I figured out what to do with the MAP controller.

So should I take the air temp sensor out of my intake tube and move it to the JR intake manifold?

(and the kit was made for the 99-00 d16y8)

JRciv

^^^Do I move the air temp sensor or not?

SOHC_MShue

you may just have to plug that hole with something. I don't know if the stock one will fit in there because on the y8s they are in the intake tube like you said, but on the z6's which your sc is probably made for they are bolted into the intake manifold.

JRciv

Well the directions are just rediculous. They say the two holes are for the purge cut solenoid valve and the boost pressure sensor. Then they go through instructions on installing both. Then, at a later point in the instructions, they say to mount the purge cut solenoid valve back onto the fuel rail like it is from the factory. I think maybe they just scramble up the directions for manual/automatic cars into one instruction manual so it get's really confusing.

I'm pretty sure the air temp sensor doesn't go in the IM though. I'm going to leave that where it is.

Jaker

You have to mount the intake air temperature sensor in the manifold. The ECU needs to see the heated air that the supercharger generates, or you'll be pinging all over the place. I suggest you get your hands on one of the IAT sensors that mounts in the manifold (any Civic up to 95 and any Integra 86 to 2001) along with the plug, and wire it up to your engine harness.

JRciv

Well what the **** - My car is a '98 Civic EX and the temp sensor is in the intake tube from the factory. Then the instrucions from jackson racing say to drill new holes in the airbox to move the sensor even FURTHER from the IM. Am I confusing two sensors here or what?


I would be eternally grateful if someone could just post pics of the JR intake manifold setup...

Jaker

Well then maybe I'm not the best person to be helping you here. It makes absolutely no sense to be reading the air temperature at the airbox, because the air the combustion chamber is seeing is so much hotter than the ambient air. With heat, the stock ECU pulls timing for good reason. Hotter air means more chance of detonation.

EE_Chris

Step #80 talks about adding the Fuel Enrichment Relay to the IAT sensor circuit - this is why the IAT sensor is mounted the way that it is.

*96-98 D16Y8 Instructions used*

JRciv

But that only applies to the wiring setup, not the actual location of the sensor. Besides, I'm not using the relay because I have the MAP controller.

EE_Chris

But see, that IS how JR decided to address fueling efforts - with the use of a pressure switch and the fuel enrichment relay on the IAT sensor.

JR is NOT counting on the IAT sensing the actual air temp exiting the blower - they instead say "At 0", the pressure switch activates and instantly makes the ECU think colder air is entering which equates to more fuel". I understand that doesn't exactly make sense, because why not sample how hot the air really is, but that is how they chose to engineer their 'solution'.

Now that you are using the JR MAP controller - the location of the IAT hasn't changed, it says so in the directions - its the IAT fuel enrichment relay which has vanished.