Magazines:  Real Estate Shopping: Adult Costumes  |  Kids Costumes  |  Car Books  |  Guitars |  Electronics
This Issue Archived Articles Blog About Us Contact Us


Some of this week's Letters to AutoSpeed

Click on pics to view larger images

Prius Pain

Click for larger image

I just wanted to say to Julian Edgar that I think the supercharged hybrid was a great project. It is painful that it didn’t work out, but I hope you had fun making it (and getting paid for it, you lucky bastard :P)

Kent Slaughter

Injector Search Complete!

Re my question at Response... I have finally sourced the injectors I want – I’ve got Keihin 73cc per second units from Canada. So my project is now moving ahead!

I have been reading Julian Edgar's write-up on his Prius. It is a shame he didn't use an Eaton supercharger. They are much quieter than a straight-lobed blower - witness the new Mini or a SC Commodore or SC Benz. The M45 is the one the Mini uses and they can be picked up pretty cheap, as can the M62 units on most MBs. Another problem is that the throttle has been place AFTER the SC and not before the SC - this causes more noise again. Another option may have been a clutched unit, so it would come on with demand. The Benz M45 and M62's have clutches and are late generation high helix blowers. I just think it is a shame Julian went to all that trouble, only to pull the SC off.

I was talking with a workshop the other day that is having all sorts of dramas with a blower on an Alfa. They also have the throttle mounted post-blower and the noise is just frantic! They can't even take it to the rego station because there is no point.

Peter de Vries

Good to hear re the injectors. Unfortunately there is no other supercharger that’s an appropriate size for the Prius (which makes just 43kW from its petrol engine). The noise remained at full throttle, so it wasn't the throttle location causing the problem. The turbo? Ahhh it's much quieter - keep watching AutoSpeed!

EWP Test Results?

Click for larger image

I am extremely interested in the testing you did of the Davies Craig EWP (Testing the Davies Craig Electric Water Pump - Part 1). I am a member of the University of Michigan Formula SAE racing team. We’ve built a small open wheel race car and use this pump on our car. Could you please send me a copy of the article you did on it? I realise that you are concerned about legal issues but I can assure you this will remain absolutely confidential and no one besides me will see the report.

Bryan GilroySmith

We are unable to present this story online or forward it to anyone on a private basis. It doesn't take much nous to work out why...

Taller Benz Gearing?

I recently bought a 2000 model MB100D with a 5-speed manual. I am wondering whether there is a different differential available so that when travelling on the highway at 110 km/h the engine doesn't have to scream at 3500 rpm? Any idea of the cost to exchange?

Roulf Commandeur

We aren’t aware of any taller diff ratios that’ll bolt in – we suggest asking your local Mercedes service centre if there’s an option.

02 Sensor Position

Quick question - what would you suggest is optimal distance from the valves to tap in an 02 sensor into the headers? How far away would be too far?

John Littler

We suggest that you have a close look at the 02 sensor positioning in some factory engines that are the same configuration as your engine (ie V configuration, horizontally opposed, rotary, in-line, atmo or turbocharged). Use these factory positions as a guide. If the engine you have came factory fitted with an 02 sensor we suggest that you stick to this location.


Click for larger image

In your article Building and Testing an Airbox you say...

"This is an extremely sensitive gauge (we’ve covered them before so to find out more, do a site search under ‘Magnahelic’)"

Unfortunately, this doesn't work because you have it misspelled! In every other article it is "Magnehelic" - with an "e".

It might be nice to fix that one as I did an initial search for "Magnahelic" and couldn't find but one reference! Any prizes for finding spelling errors?

Dave Bolen

Well spotted – article fixed. And, no, there aren’t any prizes...

Time to Mature...

Click for larger image

Can I have your opinion? After owning Escorts, early Bimmers, a few 4WD turbos and having one point left on previously pristine licence, it’s time to get ol... er... mature....

I'm down to looking at LS400/Celsiors available from Yahoo Motorsport or Ford EFII Fairmont Ghias - they are around the same price. Primarily I want a car for trips from Sydney to Inverell over the mountains and up the back country. The Falcon has longevity, age and simplicity in its favour but has a live rear end. The Lexus has wishbone suspension, but do you think its world beating engineering was five years ahead of the Falcon? I would sooooo much love a BMW 750iL, but I think that's my heart talking...

Matthew King

Wow – an interesting choice! The Celsior wins easily in terms of refinement, comfort, quality and handling stability. Performance is also in favour of the big Toyota, though a 5.0 litre V8 version of the Fairmont Ghia is in the same ballpark. The only advantages of the Ford are its simplicity and the cost and availability of parts. The Celsior is the better car overall. A back-to-back test drive will quickly convince you of that! If you haven’t already, see The Lexus LS400 and Celsior Magnificence for more on the Celsior.

Not So Cool Polo?

I own a 2005 VW Polo 1.4 litre and feel that the air conditioning on this model is not very effective. I measured the temperature of the cooled air (at the air vents) to be 10 degrees Celsius. Other models, like the Golf, are 4-5 degrees Celsius. What is the temperature that’s considered normal from factory?

Bassam ElGhussein

We suggest raising the issue with your local VW dealer service centre. They should be able to compare air conditioning performance to other versions of your vehicle and identify if there’s a problem.

Loves the Imports

Click for larger image

I just want to say that I thoroughly enjoy your road tests on the various 15 year old Japanese imports – for example, the Subaru Leone RX/II was great story (Grand-daddy Subie). I visited Yahoo Motorsport's website and found some fascinating cars. Just wondering if you might be testing any more 15 year old imports in the near future?


We plan to cover more Japanese import vehicles. However, given recent regulation changes, there won’t be many more 1989/1990 model vehicles featured.

More on Subaru Bits

In response to A.Hocking's question about intercooler splitters (Response)... To the best of my knowledge they are fitted standard to some of the later model STis. The same could also be said for intercooler water spays. If it's so effective why don't Subaru fit it to all their intercoolers? Simple answer - cost and simplicity. That is why the STi has both a spitter and water spray...

Brent Muldoon

Did you enjoy this article?

Please consider supporting AutoSpeed with a small contribution. More Info...

Share this Article: 

More of our most popular articles.
The most amazing flying machines you've ever seen

Smart Technology - 5 March, 2002

Between the Wind and the Waves: Ekranoplans

Is it time for a new direction in car modification?

Special Features - 13 May, 2008

Where to From Here?

Do it yourself development of an aero undertray

DIY Tech Features - 3 June, 2004

Undertrays, Spoilers & Bonnet Vents, Part 2

The incredible land speed record Bluebird

Special Features - 3 April, 2006

World's Greatest Cars, Part 1

Fuel economy of 1 litre/100km from an amazing car

Technical Features - 11 June, 2002

The World's Most Fuel-Efficient Car

DIY Module that can pulse horns, lights or solenoids

DIY Tech Features - 23 June, 2008

The eLabtronics Pulser, Part 1

Building a programmable temperature alarm

DIY Tech Features - 13 October, 2009

eLabtronics EZ System, Part 2

Want to see where you're going with modifications? Measure the airflow meter output.

DIY Tech Features - 20 January, 2005

Using the Airflow Meter as a Dyno

So what makes a vehicle have a good ride?

Technical Features - 4 May, 2010

Ride Quality, Part 1

Testing performance

DIY Tech Features - 21 April, 2009

Ultimate DIY Automotive Modification Tool-Kit, Part 4

Copyright © 1996-2019 Web Publications Pty Limited. All Rights ReservedRSS|Privacy policy|Advertise
Consulting Services: Magento Experts|Technologies : Magento Extensions|ReadytoShip