Don't Remove Your Turbocharged ITB Setup's WASTEGATE! | Individual Throttle Body Tuning [
Vložit
- čas přidán 28. 06. 2024
- Higher Boost, Higher RPM = A Turbo Choke Point?
When it comes to Tuning ITB’s unfortunately simply tuning with the Speed Density Principal can present certain complications. Luckily using Alpha-N we can avoid these pitfalls to get reliable inputs, air fuel ratio readings and results.
In this [TECH TALK] Andre dives into aftermarket tuning of ITB’s with the Emtron KV8 ECU using Alpha-N on an R34 GTR. Talked about is using and understanding Emtune, the Emtron tuning software, the difference ITB’s can make with the Ignition Table, AFR and the Target Lambda Table.
Also covered is how a lot of people assume when tuning ITB’s you need to remove or wire open your wastegates, but this can actually be counterproductive. Lastly, Andre dives into how with ITB tuning when you reach a higher boost and higher RPM the turbocharger/s can become a choke point and explains how as a tuner you can get around this via a secondary load table.
0:00 - Intro
0:23 - The Speed Density Principal
01:00 - Why doesn’t it work with ITB’s?
02:24 - What’s the solution? - Alpha-N
03:20 - Throttle Position & Airflow Relationship
04:14 - Factory ITB’s on the RB26
05:05 - Aftermarket Tuning
05:58 - ECU
06:20 - Using & Understanding the Emtron ECU Software
08:15 - Ignition Table
09:15 - AFR
11:07 - Target Lambda Table
12:08 - Keeping a Consistent AFR
12:45 - The Problem
12:30 - The Solution
14:38 - Dealing with the Richer the AFR at Higher RPM
15:15 - Secondary Load Table
16:15 - Outro
Want to learn how to tune EFI? Start here instantly, and for free: bit.ly/EngineTuningFree
Website: www.hpacademy.com
Contact: support@hpacademy.com
Merch: bit.ly/MerchHPA
#highperformanceacademy #itbtuning #emtron #alphan #learntotune #individualthrottlebodies #speeddensity #emtronworld #r34gtr #gtrtuning #itb #rfb #tuning #r34 #GTR #rb26 - Auta a dopravní prostředky
You asked for more track footage, engine noises and b-roll. We present to you less of these things, in the form of a podcast. You're welcome.
Stream via your favourite service here: www.hpatechtorque.com/
And merch yourself here: shop.hpacademy.com/- Taz
so, this featured ECU is averaging the tables between Alpha-N, VE and target AFR tables? man, i remember playing with Alpha-N on my 4 cylinder turbo car to see what it would do for idle and acceleration enrichment and boy, did that thing roar!💪
Appreciate you breaking this down in a video
This should come handy when working on my GTIR with nistune. Thx Andre!
I’ve seen GTIR a few times and thought I’d ask as It’s been recent, mind sharing what it stands for? I keep reading it as Imitation, like a gtst with rb26 or installed itb’s
@@Master_Psyper it’s a pulsar gtir, was built by nissan to compete in rally, has an sr20 turbo with individual throttle body’s and AWD
@@bretth3224 aaahhhhh awesome, thanks
@@Master_Psyper yes it's a different platform with a variation on the SR20DET with ITBs, solid lifters, and some other beefier components. I have a video series where I'm building one on my channel 😉
@@FWLRmusic oh nice, i appreciate it, that makes a lot more sense now lol. good luck with the channel and build, ill check it out for sure.
Can u use a compensation table when tuning a NA motor that may see high/low altitudes, depending on where u tune it, that may disrupt the target AFR
Wish I knew this 12 months ago, I found this out the hard way
how so？
Hi! Nice video, but I feel or think that you went a bit too fast between the TPS vs RPM VE table and the AFR table. Yes, I understand that the AFR target are MAP driven, and the target will be richer. But the increased “plenum” pressure does not directly do anything with the VE values in the map. Are you multiplying the VE values relative to “plenum” pressure? Or in other words, use the pressure before the throttle blades as a barometric correction? Would have been nice to get more in details there.
so you still need to hook up a map sensor at idle?
Thanks Andre 👍
What would you recommend I do when looking to add efi to a late model 300cc 2 stroke dirt bike?
I was planning to go with a simple throttle body off a 450 MX bike and a Haltec E550.
My concerns were about getting a sensible MAP signal given that it would have a very short runner length between the butterfly and the Reed valve plate.
I also considered referencing the MAP signal off the crankcase, but the signal would be worse, swinging from pressure, to vacuum and back as the piston runs through its strokes.
Is mapping via TPS the only option here, or a combination of TPS and MAP with a switch point 🤷♂️
How does only calculate VE on a 2 stroke engine, especially one with a set of electronic power valves?
I'm pretty ignorant when it comes to tuning but why can't a good MAF/MAP reading taken off the airbox/plenum preceding the ITBs?
Because you what you actually want to know is the pressure between the throttle body and the intake valve.
is afc capable of correcting AFR from 12.0 to 15.0 at idle ?
MAP sensor at idle is 1.9 , but it should be around 1.55 volts
is it capable of correcting this MAP voltage ?
ive got 4age 20v silvertop itb's on a 16v 4age .
vacuum is the best i can make from them = -0.4 bar instead of -0.6 ( sinlge throttle ) .
i built a large volume vacuum block ( 1.5 liter) with a check valve to eliminate pulse .
idles nice , runs good, no hesitation . and brake booster works fine .
its just the idle afr is to rich .
anyone care to share knoledge/experience about AFC apexi?
dont need to squeeze out more hp
i would appreciate your answer ....
thanks!!!!!!