Install trumpet inside plenum. Any difference???

[nappx]

i'm happy with my open trumpet & 272.
lalalalalallalalala.....

ha ha ha
that right...but full tank will be around 350km-400km only..
last time lancer GT & new civic 2.0 (not k20 inside arr) easily can bite...

 

[pcmoddingmy]

pcmoddingmy: interesting with your DIY. can u show us the step?

Basically u just need 4 pieces of stainless steel cups, can get them from any indian shops near masjid jamek or brickfields or any other shops selling indian cookware n stuff like that. Various sizes available from 2" all the way to 4". Then for the flange, u can try to source them from exhaust pipe shops or CNC them if you have a fren working with CNC machine. To get the flange dimension, you can either go to chopshops/workshops to measure it (look for BT ITB) but note that BT and SVT ITB has different sizes. Don't use the rubber trumpet that comes stock with the ITB because the diameter is smaller than the actual ITB's mouth.
Then once you have the SS cups and flange, just need to weld them together and cut the bottom part of the cup. You can also use super strong glue (JB weld) to glue the cups to the flange but the result might not be nice for your eyes, unless you don't plan to showoff ur trumpet to your buddies I guess it doesn't matter how it looks if its inside the plenum...as long it does its job right.
Happy DIYing!

 

[Mouse]

Thanks a lot! will do it tomorrow...
the flange will make it at friend shop..

 

[1JZtezza]

firstly the sound from the 'open' trumpets is 'sweet'.
its function is to improve the 'flow' characteristics into the engine.
The actual gain is marginal except @ wide open throttle-without air filter restriction.
If installed inside plenum should use shorter trumpets lest the clearance from plenum body actually restricts air flow.As pcmoddingmy indicated you got to match diameter of trumpet to ITB.
It does not affect FC-usually its driver 'foot happy' becoz of the sound..hehe
Coupled with high compression pistons and high cams is when it actually gives a significant advantage.

 

[20V Trumpeteer]

That's why I'm so eager to install the trumpet coz wanna feel myself how 'sssswwwwweeeettttt' the sound is....later,might be poisoned by sifu2 to be one who had a 'heavy-footed disease'...hehehe....but,I've read from the previous thread that open trumpet is not advisable coz the dust and harsh particles could enter into the engine same goes to the owner who use a subaru-like bonnet cos when in a rainy day, water could enter the engine via the trumpet.....hmmm,need to think very very wisely when imaging all these thing could happen:hmmmm:...sory aaa if I'm so talkative

 

[pcmoddingmy]

Regarding the sound... i didn't feel much difference if installed inside the plenum, but the type of intake air filter used also plays an important role. If using HKS mushroom filter, I think the ITB roar will be louder. I myself using Apexi dual funnel, sound wise not much difference after swapping out the rubber OEM trumpet to SS trumpet. However, remove the plenum and you will be an immediate crowd pleaser. ;)

Trumpets aka velocity stacks doesn't necessarily increase HP, its more of a responsive improvement thingy. Just to note...

 

[j_l200s]

well, open trumpet is nice but it'll 'choke' a bit when your rpm is around 3-4k range. but after that... ;)

don't floor the throttle when u are around 2-3k rpm. slowly press down the throttle. when it passes 3.5k-4k rpm then only u floor it. u'll be amazed. :D

 

[1JZtezza]

well, open trumpet is nice but it'll 'choke' a bit when your rpm is around 3-4k range. but after that... ;)

don't floor the throttle when u are around 2-3k rpm. slowly press down the throttle. when it passes 3.5k-4k rpm then only u floor it. u'll be amazed. :D

Its not so much the trumpets but your cam and AFR.In stock mode the BT VVT kicks in @ 4400rpm but with the 272 cams the intake opens about 20deg earlier so you got to retune and that should take care of it.

 

[20V Trumpeteer]

Regarding the AFR,how to adjust it?coz my car seems to hav a misfiring sound and quite frequent there's a 'fuel-cut' feeling eventhough I'm not pressing till the redline....does it bcoz of the AFR or something else...my car really need to meet the 'specialist doctor' bout its illness

 

[meg_omen]

well, open trumpet is nice but it'll 'choke' a bit when your rpm is around 3-4k range. but after that... ;)

don't floor the throttle when u are around 2-3k rpm. slowly press down the throttle. when it passes 3.5k-4k rpm then only u floor it. u'll be amazed. :D

this is actually symptom of O2 sensor getting faulty...

 

[j_l200s]

this is actually symptom of O2 sensor getting faulty...

owh really?! hmmm, i was a bit suspicious when i did that O2 sensor test. multimeter works fine (moved up when i press throttle and down when i released throttle) except when i maintain the rpm @ 2500, the meter will be idle in the middle. It didn't move more than 8 times in 10 secs. actually... it doesn't move at all... LOL

now the hard part, where to get a new/working used sensor?

 

[meg_omen]

yup, quite pricey...
do inform if you manage to secure the item with a good price...
coz many from Club4AGE changed to Bosch LS05... however i've been quoted at RM469 by the Bosch dealer...

related to trumpet... just to share not promoting...
Drift.com.my ~ View topic - High Quality Aluminum Trumpets.

good bell-mouth shape...

 

[j_l200s]

yup, quite pricey...
do inform if you manage to secure the item with a good price...
coz many from Club4AGE changed to Bosch LS05... however i've been quoted at RM469 by the Bosch dealer...

related to trumpet... just to share not promoting...
Drift.com.my ~ View topic - High Quality Aluminum Trumpets.

good bell-mouth shape...

Just called up an authorised Bosch distributor in Butterworth. I asked him what's the model and he said it's for universal use. he didn't give me the model number . He said any car can use. the kit comes with application chart and wiring diagram. He said as long as u hook it up correctly the 4 wires, then it should be working. No return after buying cos i said i'm a car owner (customer), not from any spare part shops.
the price he quoted me for a brand new one is RM350.

anyone interested?

 

[meg_omen]

Just called up an authorised Bosch distributor in Butterworth. I asked him what's the model and he said it's for universal use. he didn't give me the model number . He said any car can use. the kit comes with application chart and wiring diagram. He said as long as u hook it up correctly the 4 wires, then it should be working. No return after buying cos i said i'm a car owner (customer), not from any spare part shops.
the price he quoted me for a brand new one is RM350.

anyone interested?

remember if using Bosch LS05 (yes it's universal)... you need to put a new 'bung' to your extractor... coz this is not like ori Toyota O2 where there's a flange instead...
good luck...

 

[j_l200s]

is the 'bung' same as the one they used to cucuk in the wideband sensor during tuning?

 

[meg_omen]

the wonder of a search engine...
O2 sensor bung - Google Search

 

[j_l200s]

the wonder of a search engine...
O2 sensor bung - Google Search

i think i have a mech who got this bung 'pattern' for sale. he's selling to those u wanna do wideband tuning. gotta check the price with him tho...

 

[sdil_trdtoms]

wat is the diff between short trumpet and long one? any comment?

 

[Dayline668]

wat is the diff between short trumpet and long one? any comment?

Diff of torque as i recall..

 

[Sil80-13]

Diff of torque as i recall..

So the short one got better torque or long one got better torque?

 

[j_l200s]

according to wiki :

A velocity stack is a trumpet-shaped device which is added on to the air entry of an engine's fuel system, carburetor or fuel injection. It is designed to:

Allow smooth and even entry of air into the intake duct with the flow stream adhering to the pipe walls.

Modify the dynamic tuning range of the intake tract slightly by functioning as a small reverse megaphone which can extend the duration of pulses within the tract.

Alter the dynamic tuning speed if it includes extra length thereby changing the tuned length to a lower rpm.

 

[Dayline668]

So the short one got better torque or long one got better torque?

Longer will produce better torque then short.

---------- Post added at 06:26 PM ---------- 6 hour anti-bump limit - Previous post was at 06:15 PM ----------

according to wiki :

A velocity stack is a trumpet-shaped device which is added on to the air entry of an engine's fuel system, carburetor or fuel injection. It is designed to:

Allow smooth and even entry of air into the intake duct with the flow stream adhering to the pipe walls.

Modify the dynamic tuning range of the intake tract slightly by functioning as a small reverse megaphone which can extend the duration of pulses within the tract.

Alter the dynamic tuning speed if it includes extra length thereby changing the tuned length to a lower rpm.

Sorry for my bad english.. but i dun know wat it mean..?

 

[pcmoddingmy]

IIRC, longer trumpet will improve low-end torque... shorter trumpet for high-end torque, or is it the other way around. The best way is to dyno test it out...

 

[ajik8953]

Thanks a lot! will do it tomorrow...
the flange will make it at friend shop..

cikgu..how's it done?share ur pic la...

want to order 1 set for my use..boleh ka...hehe

 

[tofu_manic]

longer velocity stacks aid in lower-end torque, like what dayline sed

with/without trumpets, without it the air entry will be rough/messy, with it, response definitely improved, and seemed more eager to get off the line as well, just felt better all round

dcoe40/4g15 user here but applicable here as well haha