RS Intake Manifold,airbox mod and 1zzfe throttle body/injectors - Toyota Yaris Forums

Compeer · 02-07-2023, 01:00 PM

Hey guys I have been planning on doing the 1zz-fe throttle body sway for a while and have been reading up.

Found these guys selling RS intakes saying they produced a little better top end power and torque, it's one of the mods they do in asia.

Here a pick showing the difference, it's funny becasuse there is the mod to increase the size again from the longer version, which they said lowers where you get the torque but will decrease hp and toyota does know what they are doing and the best NA cars have short stacks not long ones.

So I am picking up the intake and airbox today from an RS, Plan is to mod the airbox by removing the ribs, adding a performance panel filter and then enlarging the intake hole and adding an intake trumpet facing down into front bumper from the opposing side as the factory had it so the air is always flowing the same direction. May use some ofther factory car intake pipe to run from airbox to bumper cavity. I want to keep it short so not all the way down into bumper, with the floods I don't need my intake to low

For the intake manifoldI will use high temp plastic or even a wood adaptor plate with some gasket paper to fit a 59mm throttle body ether from a 1zzfe or a 1az as they are both the same size and we dont care about the electronics anyway as we will be following this amazing New Zealand guide https://sergei.nz/toyota-vitz-rs-and...ttle-response/ So will be replacing the insides with the current yari insides of the throttle body and adjusting idle screw.

The 1zz-fe injectors and Throttle body I still need to go to a PickaPart wreckers and take off a car. Injectors will then go and be cleaned and flow matched with new filters and o-rings. Its about $33nzd an injector at local shops here in Auckland city.

Picked up some of the parts yesterday.

Can see the RS Shorter intake and its part number.

Time to MOD! Starting with the Airbox!

Used various pliers and what not to get all the ribbing out I could.

Then started to get serious and cut off the old intake ring to be used on the opposing side as well drilled out a hole for the new intake.

Then I got out the soldering iron and went ham using the plastic pieces I had removed to plastic weld the intake on and to seal the old holebefore sanding it all.

sh0rtlife · 02-08-2023, 12:41 PM

it will be intresting to see if your plan works...and if it does ill be following your path for sure...the yaris suffers from a lack of torque off the hop

Compeer · 02-08-2023, 07:36 PM

Quote:

Originally Posted by sh0rtlife

it will be intresting to see if your plan works...and if it does ill be following your path for sure...the yaris suffers from a lack of torque off the hop

Yeah I can't wait to hear some intake noise as well, My airbox now works as a trumpet it's going to have way more "DOOOOORT!!!!"

sh0rtlife · 02-09-2023, 01:18 AM

do we know if the "rs" short ram was used on any other car as a non RS?...i ask because i swear ive seen the short intake before but i cant place where....prius?

Compeer · 02-09-2023, 03:29 PM

Quote:

Originally Posted by sh0rtlife

do we know if the "rs" short ram was used on any other car as a non RS?...i ask because i swear ive seen the short intake before but i cant place where....prius?

Not prius but some of the larger cars got this manifold in 2004-2006 namely corolla variations and the ist for a hot minute.

Seems some of the more sporty corrola variants with 1.5 from 2008 on had them. If it has the shorter manifold it would be worth checking to see if it has the more aggressive vvti solenoid while you are the wreckers too.

sh0rtlife · 02-09-2023, 04:37 PM

Quote:

Originally Posted by Compeer

Not prius but some of the larger cars got this manifold in 2004-2006 namely corolla variations and the ist for a hot minute.

Seems some of the more sporty corrola variants with 1.5 from 2008 on had them. If it has the shorter manifold it would be worth checking to see if it has the more aggressive vvti solenoid while you are the wreckers too.

shit..i actualy found the more agressive VVT on an XA.....maybe thats where i spotted the short ram

but ill be watching all the rolla's now cause torque is where these lil yaris fail

Compeer · 02-09-2023, 07:14 PM

Quote:

Originally Posted by sh0rtlife

shit..i actualy found the more agressive VVT on an XA.....maybe thats where i spotted the short ram

but ill be watching all the rolla's now cause torque is where these lil yaris fail

Yeah it should be good for a few hp's in the top end,
I will put the airbox on today today and give it a try, I still have the entire stock setup for everything so if I ever want to put her back to stock I have it all put away, this also lets me play and see what I like the feel of most.

mitch9521 · 02-12-2023, 01:31 AM

huh, I didn't realize the manifolds were different.

the USDM 1NZ one is 17101-21080 while the "RS" manifold is 17101-21070. Guess its time to go on beforward and grab one off a Toyota Ractis or Vitz RS lol. I already have a second gen Ractis cluster in my 2014, may as well run a Ractis manifold too

Compeer · 02-12-2023, 05:35 AM

Quote:

Originally Posted by mitch9521

huh, I didn't realize the manifolds were different.

the USDM 1NZ one is 17101-21080 while the "RS" manifold is 17101-21070. Guess its time to go on beforward and grab one off a Toyota Ractis or Vitz RS lol. I already have a second gen Ractis cluster in my 2014, may as well run a Ractis manifold too

Have you already done the 1zz-fe throttle body and injector swap?

mitch9521 · 02-12-2023, 04:21 PM

Quote:

Originally Posted by Compeer

Have you already done the 1zz-fe throttle body and injector swap?

No. Stock injectors and TB, the throttle response doesn't bother me after I swapped in the Lexus IS250 pedal that gets rid of the dead spot and makes the pedal heavier feeling.

Neinris · 02-12-2023, 05:01 PM

Quote:

Originally Posted by mitch9521

No. Stock injectors and TB, the throttle response doesn't bother me after I swapped in the Lexus IS250 pedal that gets rid of the dead spot and makes the pedal heavier feeling.

I've thought of doing the pedal swap in the future. Would you share how you mounted the pedal? Did you make an adaptor plate?

mitch9521 · 02-13-2023, 07:33 AM

Quote:

Originally Posted by Neinris

I've thought of doing the pedal swap in the future. Would you share how you mounted the pedal? Did you make an adaptor plate?

The gen 3 Vitz RS has its own OEM pedal bracket so I just ordered one from RHDJapan. I don't know if it will work in a 2nd gen though.

Part number is 78114-52020.

Neinris · 02-13-2023, 02:59 PM

Quote:

Originally Posted by mitch9521

The gen 3 Vitz RS has its own OEM pedal bracket so I just ordered one from RHDJapan. I don't know if it will work in a 2nd gen though.

Part number is 78114-52020.

Thanks! Does it look like something like this? If so, did it feel weird that the pedal moved forward? The second and third gen's throttle pedals are the same btw.

mitch9521 · 02-13-2023, 09:25 PM

Quote:

Originally Posted by Neinris

Thanks! Does it look like something like this? If so, did it feel weird that the pedal moved forward? The second and third gen's throttle pedals are the same btw.

Sort of, its metal though and raises the pedal up about an inch which makes it almost level with the brake and clutch, makes heel-toe a breeze. The Lexus pedal I pulled out of the junkyard had that spacer, I didn't end up using it though and threw it out.

Neinris · 02-14-2023, 11:53 AM

Quote:

Originally Posted by mitch9521

Sort of, its metal though and raises the pedal up about an inch which makes it almost level with the brake and clutch, makes heel-toe a breeze. The Lexus pedal I pulled out of the junkyard had that spacer, I didn't end up using it though and threw it out.

Thanks! I can probably make such an adapter plate. It won't be pretty, but I won't see it so it'll be ok.

mitch9521 · 02-14-2023, 06:17 PM

Quote:

Originally Posted by Neinris

Thanks! I can probably make such an adapter plate. It won't be pretty, but I won't see it so it'll be ok.

If I remember right, the bracket was only ~$12 CAD on RHDJapan's OEM store lol

Neinris · 02-14-2023, 07:31 PM

Quote:

Originally Posted by mitch9521

If I remember right, the bracket was only ~$12 CAD on RHDJapan's OEM store lol

I'm not sure if you've looked recently, I punched in that PN 78114-52020, but it's no longer available.

WeeYari · 02-14-2023, 08:50 PM

It is on eBay. All I can quickly see is Canadian shipping which is as usual, astronomical. Don't know what US shipping would be.

02-07-2023, 01:00 PM	#1
Compeer Drives: NCP90 TRD Yaris Manual Join Date: Oct 2022 Location: Auckland, NZ Posts: 266	RS Intake Manifold,airbox mod and 1zzfe throttle body/injectors Hey guys I have been planning on doing the 1zz-fe throttle body sway for a while and have been reading up. Found these guys selling RS intakes saying they produced a little better top end power and torque, it's one of the mods they do in asia. Here a pick showing the difference, it's funny becasuse there is the mod to increase the size again from the longer version, which they said lowers where you get the torque but will decrease hp and toyota does know what they are doing and the best NA cars have short stacks not long ones. So I am picking up the intake and airbox today from an RS, Plan is to mod the airbox by removing the ribs, adding a performance panel filter and then enlarging the intake hole and adding an intake trumpet facing down into front bumper from the opposing side as the factory had it so the air is always flowing the same direction. May use some ofther factory car intake pipe to run from airbox to bumper cavity. I want to keep it short so not all the way down into bumper, with the floods I don't need my intake to low For the intake manifoldI will use high temp plastic or even a wood adaptor plate with some gasket paper to fit a 59mm throttle body ether from a 1zzfe or a 1az as they are both the same size and we dont care about the electronics anyway as we will be following this amazing New Zealand guide https://sergei.nz/toyota-vitz-rs-and...ttle-response/ So will be replacing the insides with the current yari insides of the throttle body and adjusting idle screw. The 1zz-fe injectors and Throttle body I still need to go to a PickaPart wreckers and take off a car. Injectors will then go and be cleaned and flow matched with new filters and o-rings. Its about $33nzd an injector at local shops here in Auckland city. Picked up some of the parts yesterday. Can see the RS Shorter intake and its part number. Time to MOD! Starting with the Airbox! Used various pliers and what not to get all the ribbing out I could. Then started to get serious and cut off the old intake ring to be used on the opposing side as well drilled out a hole for the new intake. Then I got out the soldering iron and went ham using the plastic pieces I had removed to plastic weld the intake on and to seal the old holebefore sanding it all. Last edited by Compeer; 02-22-2023 at 11:12 AM.

02-12-2023, 01:31 AM	#8
mitch9521 Gen 3 > Gen 2 Drives: NCP131, F-150 Join Date: Jul 2019 Location: Red Deer, AB Posts: 497	huh, I didn't realize the manifolds were different. the USDM 1NZ one is 17101-21080 while the "RS" manifold is 17101-21070. Guess its time to go on beforward and grab one off a Toyota Ractis or Vitz RS lol. I already have a second gen Ractis cluster in my 2014, may as well run a Ractis manifold too __________________ 2014 NCP131 5 Speed 2007 F150 4.2L 5 Speed 2013 Rav4 LE AWD Autotragic - Wife's

02-14-2023, 08:50 PM	#18
WeeYari View User's Garage Drives: 06 Polar White 5dr, 13 Soul 4u Join Date: Oct 2008 Location: Georgetown, Ontario, Canada Posts: 5,740	It is on eBay. All I can quickly see is Canadian shipping which is as usual, astronomical. Don't know what US shipping would be. __________________

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02-08-2023, 12:41 PM	#2
sh0rtlife Drives: 2007 5dr canadian import Join Date: Dec 2016 Location: pacific north WET Posts: 1,025	it will be intresting to see if your plan works...and if it does ill be following your path for sure...the yaris suffers from a lack of torque off the hop

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sh0rtlife Drives: 2007 5dr canadian import Join Date: Dec 2016 Location: pacific north WET Posts: 1,025	do we know if the "rs" short ram was used on any other car as a non RS?...i ask because i swear ive seen the short intake before but i cant place where....prius?