Load Sensing for ITBs
I was reading a past article for tuning ITBs (individual throttle bodies) and
had a question about how you would meter the induction air. Would you use AFM or
MAP? Also, do you think using ITBs from a motorcycle is logical?
You can use either a MAP sensor or
AFM. A MAP sensor will need a vacuum/boost signal derived from all throttles –
not just one. An airflow meter can be used so long as the throttles are
contained in a plenum that connects to the AFM. The airflow meter has advantages
in terms of tuning accuracy and is a good choice so long as it doesn’t cause
excess airflow restriction. The Nissan RB26DETT, GTi-R-spec SR20DET and early
model Toyota 4A-GE 20V use individual throttle bodies –
and all use an airflow meter. Re motorbike throttles... We suggest comparing the
power output per cylinder of the donor bike against the car. If they generate
similar power there shouldn’t be any major problems.
Mazda Mess Up
Great mag - as always. Just to clarify re Practical Performers - Part One...
The V6 engine in the Telstar/626/MX6 (Australian models) is the 2.5 litre KL03.
It’s a detuned version of the KLZE, which is highly sought after from Japanese
import wreckers. Remember the V6 Ford Laser you profiled a few years ago (Pot Grower)?
It’s now running around with the KLZE!
Well spotted! Correction made.
Problem with Spray Module
I purchased the AutoSpeed/Labtronics intercooler water spray module (as seen
at Intelligent Intercooler Water Spray - Part 1).
I have wired it all up as per the instructions, but can’t make the injector wire
work. The kit states that I should power it up first without the injector wire
connected and that there should be three green lights. Did this and got the
three green lights.
Next, the instructions say to connect the injector lead to one side of the
injector and, if I don’t see a solid green light, to hook it up to the other
side. I have done this - but this is where my problem is...
Connected to either side of the injector I get the green light cycling on and
off in five second intervals. My car is a Holden VT Commodore GENIII with a
I am hoping you might be able to shed some light on my problems or at least
supply me with some contact details of someone that might be able to help.
We suggest contacting the
designer/manufacturer – Labtronics – on +61 8 8231 5966.
Turbo Oil Pump Requirements
I am writing re your article that mentions rear mounted turbos (Ten Tech Tips).
I would appreciate it greatly if you could answer a couple of questions for
1) What flow would you recommend for the return oil pump?
2) Would you be able to suggest a suitable pump available in the
Can any readers make some
That Beauty XR8 Airbox...
I read with interest your article on the Ford XR8 on the weekend (Driving Emotion)
and was wondering if you had any more photos of the XR8 airbox you raved about.
It may well give a very nice, professional finish to the clubman I am building
if I can use a well finished factory airbox.
The airbox can be seen fitted to
the turbo Prius at The Story of Turbo'ing a Hybrid Prius, Part 2
and in our new car test at Ford BA Mark II XR8
and in the modification article Xeding Expectations
Oh, and you can see one at your local Ford dealer!
Additional Injector Controller
Just wondering if you have seen any DIY kits for additional injector control
that allow for changing pulse width with load? Something like a cross between
the nitrous fuel controller and perhaps the digital fuel adjuster?
The Digital Pulse Adjuster (DPA) is
what you need. See the AutoSpeed shop or Jaycar for further details.
With current fuel costs (which are still going up) I was wondering if you
would do articles on LPG conversions for modern cars. I have a preference for
Subarus but the local dealer said Subaru would void the warranty if any of their
cars were converted to LPG. It also seems that regulations have changed and
fitting a complying kit is limited to only a few cars (no Subies). I have a WRX
which I would love to get converted - do you know anyone who can do this in
Sydney or surrounds?
If you haven’t already, check out Getting Gas...
for our article on manufacturer-approved LPG installations. We haven’t seen any
LPG-powered WRXs – can any readers suggest some contacts?
Not Talking to the Trans
Thanx for the great articles. I am currently scanning your site coz I’m so
desperate... I urgently need to get in touch with someone who can help me with
the computer on my auto Nissan Skyline GTS (1997). I’ve fitted an aftermarket
fuel management system but now need to send the right inputs to the stock trans
computer... Any info/contacts will be greatly appreciated.
You may be able to piggy-back your new
ECU to work in conjunction with the factory ECU. In this set-up, the
programmable system controls fuel and ignition and the factory ECU is left to
control the transmission. Your management seller and/or installer should be able
to do this for you. Alternatively, you might want to look at a programmable
transmission control ECU – see www.powertraincontrolsolutions.com or