Rather like those speed meter things, only this uses injector pulses (warren, how does your Blitz thingy work? vehicle speed or injector pulses?)...

http://www.charm.net/~mchaney/roaddyno/index.html

COOL!

Thats what I thought - appears *very* comprehensive (including calculating drag resistance!), and easy to use...

 

And what the hell.. it's only money, right? Er.. Come back..

 

Hangon, it appears my credit card has done a runner.. I'll just go retrieve it!

WOW! Not extortionate price wise either, even cooler

 

Az, only one question...it mentions coil connector cables and goes on about indicitive connection etc. etc.

 

Is it gonna be a bitch to connect up with ours having seperate coil packs and frank wangle mensor etc.???

 

I mean, just wiring up a timing light to our cars seems to require a phone call to Stephen Hawking for advice??? LOL

Lol It can also use signals from the ECU, so I think that's OK..

 

I'll check with them, but I know there's at least one person on TTnet using it...

the blitz works of the speed sensor. that kit looks very cool.

 

personally i wouldent put much on products liek these. My blitz works a treat but more gimiky than anything else.

the unit is quite accurate, well pretty close but they are very easy to cheat on power stats and things liek that.

Don't get me wrong I wouldn't treat the figures as gospel Although it would be cool to hook it up on say your car, and AndyP's car - see how close it comes to your proper dyno runs, what do you reckon?

 

If nothing else it's a good way of seeing how mods affect your car..

yeah it is cool and thats why i got it lol.

mine measured somethign like 480 on my dyno run so it is quite accurate lol i made 400 ont he wheels on that run at 4000rpm

 

The unit will be as accurate as the data that is fed into it. It's actually very simple, it just seems to be measuring the time the engine takes to accelerate from one rpm to another and then it calculates the power required to do that given the figures you supply. You could do this with a stopwatch and a calculator (and O level physics) but it would take time.

A dyno measures the rate at which the engine overcomes a known resistance and gives a more direct measurement of power. My accelerometer measures the rate at which the car accelerates and given all the relevant data calculates the power required to do so.

The dyno is the easiest. The other two require accurate weight, drag co-efficient, gear ratio figures etc, but all three should give accurate and comparable results IF the data fed in is accurate. Garbage In, Garbage Out - as they say.

 

[This message has been edited by AndyP (edited 14-12-2001).]

blahblashlbahlbahblahlbahblah where do you get the time to write all that blurb

 

i must say after fixing the utterballs up SE made on my clocks (ie removing all that they did) My blitz id metre works a treat. the speed thingy is very accurate. One question though will the idmetre make a power figure closer to bhp at the wheels or bhp at the crank with the calculation it makes.

 

Dunno how your Blitz meter works but almost certainly the wheels. Reason is that it can have no idea how much power your engine makes, but it should be able to measure the effect it has. This can only easily be seen at the wheels. Of course this is all bollox if they have added a fudge-factor to cover transmission losses.