Author Topic: 22RE + Header = less power???? (Read 18402 times)

Moit88RNR · « **on:** Apr 05, 2009, 04:20:15 PM »

i put a header on my yota and left the smog stuff just sitting there unhooked. now my runner bogs at low rpm and really kicks in at high rpm. is my smog pump my problem and if so, what should i do to fix it?

thanks.

jimbo74 · « **Reply #1 on:** Apr 05, 2009, 04:27:49 PM »

have you blocked off the smog stuff or is it jsut disconnected? there is some stuff you can remove from the 22re, but it needs input from its sensors...

too little backpressure will make it feel slower...... the 22r and re do need some, they arent a huge displacement engine

NCK4L · « **Reply #2 on:** Apr 05, 2009, 04:31:44 PM »

Quote from: Moit88RNR on Apr 05, 2009, 04:20:15 PM

i put a header on my yota and left the smog stuff just sitting there unhooked. now my runner bogs at low rpm and really kicks in at high rpm. is my smog pump my problem and if so, what should i do to fix it?

thanks.

what year is your engine. Did you leave your o2 sensors disconnected? i believe you need those for your motor to run right .

Moit88RNR · « **Reply #3 on:** Apr 05, 2009, 04:38:51 PM »

the truck is an 88 but i got the motor a couple years ago and it only has 15k on it. i did leave my o2 hanging im going to go drill out the hole in the header right now and hook it up and see if that does it. the tube to the smog pump is just open. do i need to block it off?

NCK4L · « **Reply #4 on:** Apr 05, 2009, 05:07:27 PM »

Quote from: Moit88RNR on Apr 05, 2009, 04:38:51 PM

the truck is an 88 but i got the motor a couple years ago and it only has 15k on it. i did leave my o2 hanging im going to go drill out the hole in the header right now and hook it up and see if that does it. the tube to the smog pump is just open. do i need to block it off?

where do you plan on putting the o2 sensor? My downey header has a spot for the o2 sensor and it picks up off of cylinders 3&4 i think you want you want your o2 sensor to at least pick up 2 of the cylinders not sure if it would matter a whole lot though. Yes i would block that hose off you dont want it sucking outside air and dirt.

Moit88RNR · « **Reply #5 on:** Apr 05, 2009, 05:33:12 PM »

there is a spot on the header for the o2 sensor but its only off of 1 cylinder. im going to do it after work tomarrow though. i found that i need a clutch MC so thats next.

joey0712 · « **Reply #6 on:** Apr 05, 2009, 07:23:53 PM »

You gotta have the o2 hooked up mine ran like ass when i pulled it out

Moit88RNR · « **Reply #7 on:** Apr 05, 2009, 08:17:20 PM »

i was driving around with it hanging under my car

but now i pulled up my carpet and undid all the wire to the o2 sensor so tomarrow all i have to do is drill the hole in the fire wall and my header and bolt it up.

thank for all the input.

joey0712 · « **Reply #8 on:** Apr 05, 2009, 08:21:13 PM »

Boosted · « **Reply #9 on:** Apr 05, 2009, 08:51:23 PM »

Quote from: Moit88RNR on Apr 05, 2009, 04:20:15 PM

i put a header on my yota and left the smog stuff just sitting there unhooked. now my runner bogs at low rpm and really kicks in at high rpm. is my smog pump my problem and if so, what should i do to fix it?

thanks.

Simply installing a header on an otherwise stock engine will usually result in loss of power due to the fact that you will lose some torque. Torque is what you "feel" when you accelerate. Most stock engines are designed to run with a certain amount of back pressure and installing the header takes away from that. You may notice an increase in performance at higher RPM's which generally mean you have gained a little bit of horsepower which is also true for most stock engines with a header installed.

To get full benefit from a header, other modifications are necessary to make the most out of the decrease in back pressure. Just an example of what you might need to accomplish that....increased camshaft lift and timing, higher compression, better flowing cylinder head and more.....

Moit88RNR · « **Reply #10 on:** Apr 05, 2009, 09:03:54 PM »

i can always buy stuff to help. but once it come to all that other stuff i dont know

so I'll just have to hope the o2 sensor is all it is. unless you know some sneaky little tricks i can tweak with?
thanks

joey0712 · « **Reply #11 on:** Apr 05, 2009, 10:37:19 PM »

Its the o2 sensor.....

kneedownnate · « **Reply #12 on:** Apr 05, 2009, 10:46:49 PM »

Finish installing the 02 sensor, then take it from there. You can adjust the afm a little (downey off-road site should have the write up), but you'll also need to set your complete exhaust system up to compliment the header. What brand of header? Just installing a flange with random tubes won't necessarily give you a gain, especially over the stock manifold which is actually a tri-y design.

Moit88RNR · « **Reply #13 on:** Apr 05, 2009, 11:18:06 PM »

the header is into 2.5 in. into a 40 series flowmaster that turns down right before my axle. i dont know how to

w/ the afm or any of those things. I'll mess with it tomarrow after work or in the morning and let you guys know the results.

94MtnYote · « **Reply #14 on:** Apr 05, 2009, 11:20:56 PM »

You might consider placing the O2 sensor farther down on the exhuaust so it picks up all the cylinders and won't have to drill into your header.
my truck is a 94 and it has sensors on the piping before and after the cat.

Moit88RNR · « **Reply #15 on:** Apr 05, 2009, 11:36:28 PM »

the header has the hole and everything for the sensor to bolt to it's just not drilled. it looks like thats what its for.

94MtnYote · « **Reply #16 on:** Apr 05, 2009, 11:42:12 PM »

oh ok one of the posts made it sound like you were gonna drill

Moit88RNR · « **Reply #17 on:** Apr 06, 2009, 08:17:29 PM »

put the o2 sensor back in and took a short test drive and it felt the same but Ill see tomarrow on the way to work.

joey0712 · « **Reply #18 on:** Apr 07, 2009, 08:42:05 AM »

Are u sure u have it in the rite spot? Did it throw any codes?

wakkjobb · « **Reply #19 on:** Apr 07, 2009, 10:26:31 AM »

2.5" exhaust sounds like too much; on wildyoats.com there's an exhaust thread and it says no more than 2.25" to maintain decent backpressure with a header.
Had a similar issue with my 79; put 2.5" on stock exhaust... was a dog after tuning. Found junkyard long tube header, installed with 2.25" pipe and Thrush muffler (also turn-down in front of axle) and the truck is quicker now.

Hell, might even try 2.0" pipe or would that be way too restrictive?

and good luck!

Dan

Boosted · « **Reply #20 on:** Apr 07, 2009, 12:30:15 PM »

Quote from: wakkjobb on Apr 07, 2009, 10:26:31 AM

2.5" exhaust sounds like too much; on wildyoats.com there's an exhaust thread and it says no more than 2.25" to maintain decent backpressure with a header.
Had a similar issue with my 79; put 2.5" on stock exhaust... was a dog after tuning. Found junkyard long tube header, installed with 2.25" pipe and Thrush muffler (also turn-down in front of axle) and the truck is quicker now.

Hell, might even try 2.0" pipe or would that be way too restrictive?
and good luck!

Dan

This supports the lack of backpressure theory....

Snowtoy · « **Reply #21 on:** Apr 07, 2009, 04:06:16 PM »

^^X2, as well as having too open of a muffler. The 4cyls just aren't flowing that much air to need a large/open exhaust, system. The high flow exhausts work great above 4k rpm's, it is just getting there that is an issue.

I would redo the tube in 2-2.25" to the muffler than 2" or smaller after the muffler if the Series 40 is an open style.

Moit88RNR · « **Reply #22 on:** Apr 07, 2009, 04:31:59 PM »

thats not good news. I only paid $55 for the header, pipe and muffler and didnt think to much about that when i throw it on. do you think maybe smaller pipe before and after the muffler (like mentioned above) might help? I figured if the header was made for 2.5 inch it would b ok.

emsvitil · « **Reply #23 on:** Apr 07, 2009, 05:40:34 PM »

Now that you have a O2 sensor, pull the fuse on the ECM so it can relearn quicker.

FLRunner · « **Reply #24 on:** Apr 07, 2009, 07:08:57 PM »

You mite want to check that front lower exhaust bolt

NCK4L · « **Reply #25 on:** Apr 07, 2009, 08:02:56 PM »

just thought i would let you know i threw a downey header with 2.5 inch exhaust and a 40 series flowmaster on my 86 runner and it seems to run fine other than it is to loud. My exhaust does flow through all the way to the rear of the truck though don't really know if that helps with back pressure

jimbo74 · « **Reply #26 on:** Apr 07, 2009, 08:07:43 PM »

the 22r downey exhaust is 2.5.... its huge!

have one sitting in my backyard

NCK4L · « **Reply #27 on:** Apr 07, 2009, 08:10:17 PM »

Quote from: jimbo74 on Apr 07, 2009, 08:07:43 PM

the 22r downey exhaust is 2.5.... its huge!

have one sitting in my backyard

whats it doing back there. Kind of expensive to have it sit out back and collect dust

kneedownnate · « **Reply #28 on:** Apr 07, 2009, 08:11:42 PM »

I don't know why people are so insistent on believing *theories* they read on the internet. I suggest people put it into effect themselves before blindly saying 2.5" is too big. I did, then a few years later necked it down to 2.25" and LOST low end response and power. I put a theory to the test before believing it and found it to be wrong, which is what my brother had been suggesting to be true before, and it wouldn't have bothered me to prove him wrong either. He's just too damn smart for his own good sometimes

The thing is, no matter what setup you're running, it just won't work to it's full potential unless each piece is tuned to work together. Each mod I've made to my truck has been put to the test of pulling a steep hill on the freeway going to work, which really helped me keep track of each change I made to my truck.

On the right in the last pic, have you capped that emissions tube off? I'm sure that'll mess with you if left open. And if it helps, that looks like a NWOR header, which is a pretty nice design, though I think thorleys are a little better tri-y.

Moit88RNR · « **Reply #29 on:** Apr 07, 2009, 08:29:08 PM »

thanks. i did not know what kind of header i had. i bought a non running truck 4 $70 and the header was on it so i put it on my 4runner. if anyone knows of any other small motor mods they think i should try i would be interested in hearing them.

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Moit88RNR [OP]

Related Topics