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With open trumpets should i change the ECU?
Topic Started: Sep 1 2009, 04:11 PM (444 Views)
luvinTHElevin
Stage 3
Just looking into changing to some loud but awesome open throttle bodies! but heard it may be pointless without changing the ECU.....iv read that OMEX supply a really good ECU which would be sufficient.

what do you guys recommend? Would it be pointless changing the ecu just for throttle bodies? Or would it be needed? Also would changing the ECU effect other areas of the car? Just worried about a chain expensive if you know what i mean...lol

Any help/advice would be appreciated, thanks guys
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Takabell
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Stage 3
U don't have to change the ECU but ur ECU would need tuning and since u can't chip a toyota ECU u'd have to go piggy back, such as a emange blue or ultimate. U need tuning tu re-adjust the air-fuel ratios since ur engine will be breathing better now.

If u have the money to spend then go standlone and change the ECU. This serves as a good base for future upgrades.
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20vLevin
Stage 4
Mine runs ok with trumpets and a itg filter, fueling was ok on the rolling road and i haven't had any probs in the last year
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n2o
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mechanical n00b
there is no need to change an ecu for open trumpets......
it's been tested and proven when running open trumpets you do lose power.

just provide you with food for thought
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JDM
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AE111
n2o
Sep 2 2009, 02:05 PM
it's been tested and proven when running open trumpets you do lose power.
Ive read this and then ive read other posts sayin that it gives you around 8 extra bhp. :idk:


this whole trumpet issue is frustrating. :wall:

it seems 50% of people say one thing and 50% say another.

makes me feel dizzy :sick:
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import_trung
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Stage 6
you say it's tested and proven, but no one has seen or posted proof results.

if you have dyno graphs, please post up for all to see.

as for the OP asking whether an aftermarket ecu is worth it, it is always worth it to tune all the mods you have to benefit 100%.

as for wanting to go down the omex route. DONT.

it isnt as simple as plug and play.
you'll need a custom crank pick up, custom wiring, lose the dizzy and change to wasted spark coil pack. you'll need to fit an aftermarket water temp sensor, alot of faffin with the calibration to get it to run ok. you'll lose certain functions, namely cold start up, and the worst is that it runs open loop. it doesnt run a lambda sensor, so it doesnt self correct, so your tune must be spot on, otherwise it'll run off.

not worth it in my experience.
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20vLevin
Stage 4
Look at my results here!!!!!!!

Click here!
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JDM
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AE111
did you use the same rollers?
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20vLevin
Stage 4
Yeah mate Triton Motor Sport in bournemouth near the airport. Granted they are a few months apart but you get the idea
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Crampy
Stage 2
With open trumpets you lose power down low. The plenum plays part in the tuning of the intake system. Open trumpets will give a gain up high (if of a good design) but for street it's much better to leave the plenum chamber in place. Also, having the chamber means you're not sucking in hot air from the engine bay (also bad for power).
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luvinTHElevin
Stage 3
But the sound is to die for, so iv been told! and as long as its not noticeably slower i dont really mind. :)
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JDM
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AE111
Takabell
Sep 10 2009, 01:29 PM
what that dude said about losing power is total BS. The only way that is
He may just be ill informed.

I think total BS is a bit harsh, maybe he meant what you said about installing trumpets with standard exhaust etc.

:idk:
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Jungian
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Stage 4
Takabell
Sep 10 2009, 01:29 PM
20vLevin awsome results but u say u've never seen figures so hi for a 20, mine made 133hp to the wheels and 110 ft lbs with minor mods, K&N filter in stock box and 2 1'4 exhaust decat.

And what that dude said about losing power is total BS. The only way that is possible is if someone is stupid enough to install ITB trumpets on a stock exhaust. Ur engine will be suckin gin more air so the exhaust needs somewere to go and a stock exhaust doens't do much so u will lose power.

I'm gonna do some upgrades to my engine and my goal is atleast 160hp to the wheels. Oh and one of thoe upgrades is ITB trumpets.
So you don't have trumpets then?
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Takabell
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Stage 3
No i don't have trumpets, already bought but not installed as yet. For proven results check this page http://www.wheelsjamaicahost.com/wheels_forum/index.php?topic=32929.0
Edited by Takabell, Sep 11 2009, 04:55 PM.
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TRUENOSAM
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Stage 6
jdm
Sep 11 2009, 10:02 PM
Taken from the link above.
"4E-FTE"
 
Simply slapping on a set of horns will not make power, trust me on this.


How do i know if i have a auto ecu or a manual ecu?
It will say on the ECU
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JDM
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AE111
Will have a look tomorrow

been reading and reading that page by 4E-FTE and I'm only slightly less confused.

"4E-FTE"
 
The original figures were 132.9 with 103lb/ft. We only added the horns, there were no other modifications to the car. This is a gain of 8.6whp - 6lb/ft over his standard ECU and a massive 12.9whp - 12.7lb/ft.


So now it would seem that a decent set of horns will give around 8hp extra.

from what ive read..... 50mm horns are the ideal size. manual ecu will make more power if the air temp sensor is mounted correctly, and a manifold/exhaust system is vital.

:)
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Crampy
Stage 2
You lose DOWN LOW with open trumpet. For a street car it made leaving intersections a big pain in the ar$e to be honest. I also loved the sound, so put up with it. There are much better gains to be had by leaving the plenum on, with 50mm stacks and making a good cold air feed.
Changing from stock trumpets to straight short ones you get quite a big change in the intake sound, plus you're not sucking in hot air. That's a win/win situation there.

Also, was the dyno run done with a the bonnet open (as they usually are)?
Would be good to see what difference closing the bonnet does. Might end up losing all those gains with the hot air.
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AceSniper
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Global Moderator

Think this topic has been worked over and over.

Once you fit some form of filter to open throttles most gains are lost, Try sock filters on open throttles then take them off very noticeable, and since most cars here are for the street I don't think wearing a engine out early by not using filters is a good option.
The plenum defiantly helps with torque as it keeps the air surging into the plenum... if you know how tuned length headers work same effect.

So noise and boggy down low or tuned for street use?
You can run open with std blacktop ecu but you will find it runs rich (is this a sign its not breathing as well as having the plenum)

Anyway going to lock this as it will just go down hill, have a problem with it? pm me why....

edit again by BZ-G: this topic is getting way off topic anyway since this was about "ECU" with open trumpets, so if you guys want to talk purely about open trumpets, then discuss it with the already exsiting topics about it...
Edited by BZ-G, Sep 14 2009, 04:31 AM.
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