How to make custom intake

[clutch Kick drifter]

Im wanting to make a custom intake for my blacktop SR. Should i just get a piece of like 2.5in piping and make the bends and stick the air filter on the end?

[214kka-et240sx]

why don't you just buy the greddy intake mani, or theres is other companies that make it for cheap too IMO.

[slow s13]

what does a greddy intake mani have to do with the intake tube?

I used a plastic tube from a stanza worked pretty good, I had to rap tape around the maf so the stanza tube would fit tight on it and that was about it.

If your looking for a blingin upgrade enjuku racing makes one but it has no provisions for recirculating the bov.

[clutch Kick drifter]

Ok would someone please explain the recirculating BOV. Like what does this mean "it has no provisions for recirculating the bov." Thanks

[AmoebAssassin]

Recirculating a BOV is a preventative measure on MAF equipped cars to prevent a super-rich condition in between shifts and under decelleration. Physically, recirculation means that all the air blown off by the BOV is fed back into the intake tract, pre-turbo and post-maf. This, in effect, turns your intake system into a closed loop...the only way air can escape after passing hte MAF is by undergoing combustion in the engine. Thus, your MAF reading is always accurate and the ECU will never give too much fuel on account of metered air being blown off to the atmosphere.

No provision for recirc means that the BOV has no corresponding fitting that attaches to it to which you can plumb recirc hosing. If you get a non-recirc BOV you risk stalling on decelleration, poor fuel economy, and constant backfiring between shifts which could eventually lead to turbine damage and catalytic converter damage, not to mention too much attention from the po-lice and mAd tYtE sTrEeT RaCerS, dawg.

[Nismo_Freak]

If you get a non-recirc BOV you risk stalling on decelleration

Raise your base idle to about 900 RPM and it won't happen.

poor fuel economy

It's impossible for the engine to get worse gas milage. Anyone who says otherwise is a victim of placebo, or self-induced granny driving because they don't push the throttle to hear the BOV.

constant backfiring between shifts which could eventually lead to turbine damage and catalytic converter damage

The mixture does not ignite until it mixes with the air at the exhaust exit. At least in a maintained vehicle it doesn't. If you have 10 exhaust leaks and don't take care of your car then yes, you can have backfiring in the exhaust tract. It definately does not damage the turbine, as that would cause excessive boost spiking as a side result.

[makav3li]

yes raising the idle will help from the car dying. did it to my old ka turbo and it worked with a blitz bov

[Nicksemianiw]

I'm getting a custom 3 inch intake made for me with couplers gonna cost 170 $

[AmoebAssassin]

Nismo_Freak, points taken, but it definately is possible to lose fuel economy by not recirculating. Its very simple, the fuel that is igniting out of your exhaust is not providing any work to propel the car forwards...thus, poorer fuel economy.

[ETTInnov04]

I'm getting a custom 3 inch intake made for me with couplers gonna cost 170 $

Damn, must be nice to be a baller.

[Nicksemianiw]

???? A baller?

[SixSpeedSleuth]

I made a custom Intake using my old CAI off of my Six Speed Accord. I just took a hacksaw and cut it at the proper angle and then sanded it down. I could even use the bung on it to run the Hose from the crankcase to it. Works like a charm.

[boost_creep]

im gonna try puttin my weapon r in my altima on.the bends look perfect and has the port for the valve cover.ill let you know

[Nismo_Freak]

Nismo_Freak, points taken, but it definately is possible to lose fuel economy by not recirculating. Its very simple, the fuel that is igniting out of your exhaust is not providing any work to propel the car forwards...thus, poorer fuel economy.

LOL, the .025 mpg difference that makes will really add up

Less we not forget we are OFF the throttle (ie. deaccelerating) when this occurs, so your arguement is invalid.

[clutch Kick drifter]

OK that helps alot. yeah i think im going to make a custom intake with some 3in piping. What about like the PCV valve? I always see filters on them. Where is mine on the Stock intake on SR