Cross 8 Feedback
I read Michael Knowling's article about the Holden Crewman Cross 8 (Holden Crewman Cross 8 Test)
and enjoyed it. I saw that the test vehicle Michael drove had a clunk from the
front-end and another intermittent clunk from the driveline. I was wondering if
GMH might have told you what they were, as I have a HSV Cross 8 with exactly the
same noises (which my Holden service team haven't heard before and can't
reproduce).
Also, I thought Michael must have driven fairly conservatively as his petrol
consumption was fairly good compared with my 20 litres per 100km using premium
unleaded.
Greg Hedditch
Australia
No, we don’t know the cause of the
clunks – but it seems our test car didn’t have a one-off problem... As quoted in
the article, we recorded 19 litres per 100km in city/urban conditions – pretty
similar to your claimed fuel consumption.
Using DFA on MAP
I have an AE92 Toyota Corolla with an AE111 20-valve 4A-GE which uses a MAP
sensor. I recently bought a Digital Fuel Adjuster (DFA) with the hope of
altering the air-fuel ratio. I hooked it up to the MAP sensor signal - it sits
on load point 48 at idle and maxes out at load point 93 (getting there quite
early in the rev range). Now I need to know is there anyone in Brisbane who has
experience with the Digital Fuel Adjuster and maybe able to help me.
Shane Bromage
Australia
Those load points make sense. Because
your car’s engine is MAP sensed, it will reach its maximum load input as soon as
full throttle is used - almost regardless of rpm. If you’re not confident tuning
the DFA we suggest visiting ChipTorque. But be aware that the DFA is not ideally
suited to MAP sensed engines. To understand the reason for this, see The Fueltronics AMFC
Big Turbo for Little Engine
I recently purchased a 1984 G11 Daihatsu Charade Turbo. I did a quick search
on the web, found your article (Daihatsu Charade Turbo)
and noticed the fact that Michael Knowling once owned one. I bought my Charade
with a few problems and have fixed most of them so far. It now has a 2 ¼ inch
exhaust, bleed valve (unknown boost at this point), blow-off valve and air
filter. I have read “Pocket Performer” (Response)
and will upgrade the secondary jets in the carb.
My question is concerning turbo upgrades - I have found no reference to this
anywhere. A while ago I bought a single R32 Skyline GT-R turbo and was wondering
whether it would be suitable for this car? I found a compressor map for a R33
GT-R N1 turbo and was doing a few calcs to determine whether it would suit my
purpose - it seems it is a bit too big, so I think the turbo I have may be
perfect. What do you think? Also, I understand my R32 GT-R turbo has a ceramic
turbine wheel and is good for about 150kW - is this correct? I also read Mighty Midget
and Ian Richards used a modified T2 turbo. Would this be a better match?
BTW – I love the mag. I just got all the archives and two years subscription
and can’t wait to try out all your turbo tricks!
Chris King
Australia
The R32 GT-R turbo will probably be a
bit laggy. A Nissan ET/EXA T2 would be better suited, as would a Charade GTti or
early Starlet turbocharger. You can also use one of the Toyota 1G-GTE six-cylinder turbos (which come in a
twin configuration). All of these are suitably sized upgrades for street use.
Hyper Hybrid
Julian Edgar, I’ve seen all the awesome projects you have been working on but
you haven't been telling us what difference it made to the performance and
drivability of your car. Please - tell us how it goes!
Matt King
Australia
The
supercharged Prius? A full series on that car – including performance
quantification - has recently started at Technokill: Building a Blown Hybrid, Part 1
VL into VL-T
I have purchased a 1988 Holden VL Commodore manual. I want to know what the
pin-outs of the ECU are so I can use data from the sensor wires. Do you have a
wiring diagram for the Bosch ECU? Also, I was also looking at installing a turbo
- what’s the best way I should go about this?
Joshua
Australia
A Gregory’s service and repair manual
will give you the wire colours from the ECU. With this information, you should
be able to identify particular wires using a multimeter. Alternatively we
suggest contacting your local Holden service department for a look at the
factory pin-out diagram. For the turbo system we suggest a stock VL-T exhaust
manifold with a suitably sized T3-style turbo to meet your power requirement.
Low compression pistons are advisable and you’ll need to increase fuel
flow and alter ignition timing.
Supercharged Silvia?
Just an approximate answer or a general idea would be fine here... I was told
that if I throw a supercharger (twin screw) into my Nissan Silvia it would use a
lot more fuel than a stock naturally aspirated or turbo Silvia. This is
apparently because it is constantly running max boost. How much more fuel do you
think it will use? If I currently use AUD$30 fuel a week, would this increase to
about AUD$40 or AUD$50?
Any help would be greatly appreciated. You're doing a great job with the mag
- keep it up.
Steve Brown
Australia
The supercharger won’t always be
pumping boost but it is likely that fuel consumption will be higher than the
factory turbo version of the Silvia. If you’re currently averaging AUD$30 a
week, consumption might increase to around $35 - 40 – depending how often you
use that extra power!
Fan for the Intercooler
I read about fan cooling for intercoolers (Fan-Forcing Your Intercooler, Part 1)
and drive a Rexton 270XDI. Would fan cooling be a good option for me? The car
has a tuned chip and is used a lot in slow traffic. Can I buy the fan over here
(in Holland ) or can you send it
over?
Ron
Netherlands
AutoSpeed does not sell intercooler
fans. We suggest that you look through local car/motorcycle wrecking yards to
find a fan to suit.
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