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Imec Trumpets; Questions and more Questions
Topic Started: Jan 18 2011, 01:15 PM (1,004 Views)
taz-20v
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Stage 6
First of all I'm sorry for my lack of knowledge and also sorry if this has been covered before but I looked through the site already but found very limited information on these so here goes.

I had my heart set on open trumpets because of the crazy noise which i love but unfortunately after doing some research on the forum I discovered The air/fuel ratio will be wrong and that means needing an aftermarket ecu which I cant afford so thats a no for them.

Then on reading some more I came across the Imec trumpets which go inside the plenum, These would suit me alot better as it would mean I dont need to change my ecu..or do I I'm really not sure!

I'm wondering is there much power\HP gains with these??
Have any members used these before?I seen a small thread with limited information saying the cause better acceleration but does anybody have any more information on them.
I seen that these are available on yahoo auctions and ebay but I'm looking all week cant find any.
Is there anywhere else to get these?

Thanks for any replies :thumbsup:
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The Parrot


hey taz. yup you cant really run them open properly. as you said the a/f ratio goes out. running them in the airbox plenum gives you good response gains and has a habit of giving more torque. defo worth doing when you get some spare cash
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taz-20v
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Thanks For That
Now the only problem is to source a set of Imec trumpets.
Not cheap I'd imagine
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n2o
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mechanical n00b
they're relatively cheap, the hard part is finding a set
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Bryan BZ-R
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Ive a set and there unreal... great upgrade +1
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sabajin
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sabajin
I bought my imecs from this guy:

http://cgi.ebay.com/ebaymotors/Pass-Racing-Air-Funnel-AE111-Velocity-stack-_W0QQcmdZViewItemQQhashZitem56401f7f59QQitemZ370442993497QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

He has 5 available sets. Those are really good trumpets.

Hope that helps you.

:thumbsup:
Edited by sabajin, Jan 18 2011, 08:49 PM.
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chris BZR
Stage 2
http://www.mcnsport.com/shop/part.php?car=25&category=Engine&part=2887

wonder would these be any good , he has 50mm and 70mm too , there 30mm in pic
Edited by chris BZR, Jan 18 2011, 09:04 PM.
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1i1
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NZ Toyota Parts Guy

Touge_trueno did back to back runs on a dyno and made more power through the mid-range and fraction (from memory maybe 1hp) more at the top end with the factory trumpets inside the air box over his TWM trumpets (meant to be the same as the imec?) that were inside the factory plenum too. That was on a stock BT with only a decat, 2.25" exhaust and custom air filter box
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frax
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1i1
Jan 19 2011, 12:50 AM
Touge_trueno did back to back runs on a dyno and made more power through the mid-range and fraction (from memory maybe 1hp) more at the top end with the factory trumpets inside the air box over his TWM trumpets (meant to be the same as the imec?) that were inside the factory plenum too. That was on a stock BT with only a decat, 2.25" exhaust and custom air filter box
Yeah I believe that. Can't say I'm all that impressed with my ipecs. I think the worst thing I did was take out the air res box behind the front bar.
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taz-20v
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frax
Jan 19 2011, 02:26 AM
1i1
Jan 19 2011, 12:50 AM
Touge_trueno did back to back runs on a dyno and made more power through the mid-range and fraction (from memory maybe 1hp) more at the top end with the factory trumpets inside the air box over his TWM trumpets (meant to be the same as the imec?) that were inside the factory plenum too. That was on a stock BT with only a decat, 2.25" exhaust and custom air filter box
Yeah I believe that. Can't say I'm all that impressed with my ipecs. I think the worst thing I did was take out the air res box behind the front bar.
So in other words there more or less useless??
Its more of a noise thing with me To be honest.4-age sounds unreal with trumpets saw alot of videos on youtube.
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touge_trueno
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top line is std, bottom is with TWM trumpets which are thought to be of superior design to IMEC due to their full radius curve.

so yes, you are wasting your time. this dyno test was also done with them in the plenum. leaving them open will loose you a lot more power.

the only improvement i think it could have is if i free up the exhaust side by replacing the std extractors. but it is predicted to loose mid range and gain a slight amount at the top. gains can be made by going longer (70mm+ but then they don't fit in the plenum and you are killing your engine.

this topic has been done to death. in fact their is a trumpets thread on here from not long ago where the same convo has been had x5 and i may have even posted this exact dyno plot in. please search properly 1st
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1i1
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NZ Toyota Parts Guy

Cheets for putting them up Rhys.

Unfortunately, realistically on an otherwise stock blacktop changing the trumpets is a waste of time unless you are putting socks on them and leaving the box off.. As they sound awesome. Length of trumpets needs to factor in cams, head flow, extractors etc to get the optimum power band
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taz-20v
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No problem Thanks for the help
As I said I apoligise if it was covered before I did a forum search and it never came up!.
Edited by taz-20v, Jan 20 2011, 09:26 AM.
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Bryan BZ-R
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What?? i defo felt an increase4 in power with mine anyway which are genuine imecs not copys
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1i1
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taz-20v
Jan 20 2011, 09:25 AM
No problem Thanks for the help
As I said I apoligise if it was covered before I did a forum search and it never came up!.
I've found in the past the search feature to be, well, crap haha. On this site it's best just to troll through a few pages and the info can be found B)

@Bryan BZ-R: The issue can often be due to the reduced lower RPM performance the car feels to be better up top.
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DreadAngel
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Han Lue
Bryan BZ-R
Jan 20 2011, 08:20 PM
What?? i defo felt an increase4 in power with mine anyway which are genuine imecs not copys
Psychological gain yes ;)

Its like the first day you fit a pod filter/SRI and punch it with the window down. Sounds awesome, hell sounds fast but in fact (Honda boys know what I'm talking about) you've just lost about 10hp and a bucket load of torque all along the rev range lolz...
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TRUENOSAM
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DreadAngel
Jan 21 2011, 12:01 AM
Bryan BZ-R
Jan 20 2011, 08:20 PM
What?? i defo felt an increase4 in power with mine anyway which are genuine imecs not copys
Psychological gain yes ;)

Its like the first day you fit a pod filter/SRI and punch it with the window down. Sounds awesome, hell sounds fast but in fact (Honda boys know what I'm talking about) you've just lost about 10hp and a bucket load of torque all along the rev range lolz...
The old Placebo effect has contaminated many :rotfl:
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Kurisu
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So we have reached a conclusion...

Trumpets

*Lost of power and torque
*Sounds are really good like a classic car ><
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Ikenty
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BZ Touring Carib
I still want the sound though.
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Kaiser
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You've gotta think, if it was as easy to get more power as fitting different trumpets inside the plenum, wouldn't Toyotas engineers done this in the first place?

In my opinion the engine is very well tuned from the factory, has lots of mid range torque for such little displacement. If you want no mid range torque and lots of power top end....that's what VTECs are for!
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Cheensbo
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'88 Carina II
can we use this thread as a sticky?? :P

* they lose power
* they sound amazing

if it was me, (which it aint) i wouldnt bother buyin a set of stacks, just leave the intake standard, then when you feel like making some noise, take off the plenum for a while!!

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Kurisu
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Ikenty
Jan 21 2011, 06:32 AM
I still want the sound though.
Yes they sound amazing, kind of like a AE86 track car, but imo its not worth loosing so much power...
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touge_trueno
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the feeling of going faster is def from the sound but the throttle response is quite a bit more punchy and responsive as i have found from doing touge runs with open trumpets. but without the power it is slower unless it is a really tight road.
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taz-20v
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This info has defo turned me off getting trumpets anyway.Ill spend the money on something else lol
Cheers lads.
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Levin BZR
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It has been dynoed before and for sure, imec trumpets gives hp!! (if they used properly inside the plenum)

I don't know what happened with your car touge, but in my car made a lot of difference :idk: Maybe because I have a Mine's ECU and it's working better?

I'm sure that I have seen an other member's dyno, with gains up to 10hp :whistle:
Edited by Levin BZR, Jan 21 2011, 01:34 PM.
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Bryan BZ-R
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They only get full gains from cams, im getting my car dynod in march so we'll see then but i sure they gave a gain the engine reved abot faster to

last dyno for made 147 with decat and catback and panal filter since then have fit imecs, apexi 4-1, cold air feed so im hoping 155-160 as the car is a total different breath now
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touge_trueno
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yes mines ecu is a lot different from std ecu as they are set up individually. my dyno test was a true back to back run with just the time to swap them over between runs. (bout 20mins)

this is why it is called 'tuning' not 'power upgrades', it is a mixture of things which cause your engine to increase in HP there is no set formula and it has a lot to do with some very complicated physics.
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Kurisu
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taz-20v
Jan 21 2011, 12:48 PM
This info has defo turned me off getting trumpets anyway.Ill spend the money on something else lol
Cheers lads.
Well depends if u want performance or sound.. Brightside of getting trumpets you wont have to change your air filter ever again :D
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Levin BZR
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touge_trueno
Jan 21 2011, 09:50 PM
yes mines ecu is a lot different from std ecu as they are set up individually. my dyno test was a true back to back run with just the time to swap them over between runs. (bout 20mins)

this is why it is called 'tuning' not 'power upgrades', it is a mixture of things which cause your engine to increase in HP there is no set formula and it has a lot to do with some very complicated physics.
I believe that if you put your imec trumpets back, run your car for approximately 100km and do a dyno test, you will get gains! Your ecu will get new parameters. ;)
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1i1
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NZ Toyota Parts Guy

When Rhys did his back to back dyno runs I'm 99% sure he had his shorter trumpets first which had been on the car for some time. Second run was with the factory trumpets
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supernova-dw


Your not going to get much if anything from changing the stock trumpets as like has been said Toyota would have done it if you could get 10hp as simply as this,you'll probably get a little gain in the upper rev range but loose out on the good midrange that these have in comparison to a Honda Vtec. If you were to fit short trumpets in conjunction with upgraded cams,some headwork and a upgraded manifold then I think you'd see some decent gains though !!!
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Ikenty
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BZ Touring Carib
I lost my bid so no Trumpets for me. for now.
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firks-blacktop
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i have open long trumpets with an itg filter (like ecsy) and tbh from what i can remember, i couldnt notice a difference in power, pretty much just gives an awesome sound :P the sound may even trick you into thinking its more powerful really haha.

i havent done anything else though, maybe if i got a ecu to go with it, and maybe change the exhaust system id get a significant enough improvement.....im not really that clued up about all this.
Edited by firks-blacktop, Mar 13 2011, 04:17 PM.
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touge_trueno
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Ikenty
Mar 13 2011, 07:25 AM
I lost my bid so no Trumpets for me. for now.
PM what you would pay for a set of decent trumpets. i have some trumpets sitting here i might be selling soon...postage probably won't be that much its a fairly small and lightweight package.
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AE111_JAMES
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how long are they rhys?
And what size would be the best sounding/performance?
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