thinking about a new rolling road

[spitfire4v8]

Hi all
One for the mappers / rolling road peeps out there ..

I run an old analogue dyno dynamics 450 .. it works great as these old workhorses tend to do .. however it has neither a tacho interface or a printer and I also would like to update to something newer just for the heck of it (always the best reason!)

I've had two DD450s .. the first supplied by mike gurney and the second by gerry gaffney .. both gave fab service ..
I notice they each sell dyno developments and mainline dynos .. does anyone have experience of these two dynos and what are your thoughts?
Also the entry level dyno dynamics (dynotech) doesn't seem so well received .. is there any particular reason?
What are people's thoughts on say a sub 35k gb pounds two wheel drive dyno these days. I don't really keep up with the market so don't have much of an idea what's actually about.
cheers.

[stevieturbo]

Can you uprate the current units to meet your needs ?

Might be a lot cheaper, as surely some of the hardware is the same or similar ?

But you're already speaking to the right people anyway.

[anonymous-user]

Considering you could knock up a tacho and a PC link with a £100 USB scope these days, i'd just do that.........

[spitfire4v8]

^^ how does that get the signal to the dyno so it plots the power v engine revs though? At the moment I'm doing what everyone else does with no tacho input and use the roller speed ratio v engine revs but I miss the old tacho interface of my previous dyno ..

I'm going to fire some emails off to people and see what they say of their own dynos, but naturally they're going to be (slightly) biased. Would much prefer some first hand experience.
Spending money isn't a problem, I'd just like something good and new that works right out of the box plus something new and shiny

[stevieturbo]

spitfire4v8 said:

^^ how does that get the signal to the dyno so it plots the power v engine revs though? At the moment I'm doing what everyone else does with no tacho input and use the roller speed ratio v engine revs but I miss the old tacho interface of my previous dyno ..

I'm going to fire some emails off to people and see what they say of their own dynos, but naturally they're going to be (slightly) biased. Would much prefer some first hand experience.
Spending money isn't a problem, I'd just like something good and new that works right out of the box plus something new and shiny

Surely that's simply a PC/software issue rather than the dyno itself ?

Try asking here

http://efi101.com/forum/viewforum.php?f=29&sid...

[spitfire4v8]

There's a tacho interface box that seems to be as rare as hen's teeth that's required .. you spec that when you order your dyno new and mine like many others obviously wasn't specced that way from new.
There's the digital update that you can do to bring the dyno up to current spec but from what I've read that doesn't seem to be a seamless proceedure, and isn't cheap either. I can sell my current dyno or p/ex it to offset the cost of new somewhat (old DD450s seem to fetch decent money and mine is all paid for outright) .. I'm probably looking at finding 16K to get myself into a new spangly dyno .. just want to know what's on the market to shortlist.
I've mailed Mike and Gerry already .. will fire a few other messages out there and see what deals can be done

[geeks]

Give Louis at MAHA a call, tell him Dan from the Compact Cup sent you, can't think of anyone else I would get a Dyno from!

[anonymous-user]

spitfire4v8 said:

^^ how does that get the signal to the dyno so it plots the power v engine revs though? At the moment I'm doing what everyone else does with no tacho input and use the roller speed ratio v engine revs but I miss the old tacho interface of my previous dyno ..

I'm going to fire some emails off to people and see what they say of their own dynos, but naturally they're going to be (slightly) biased. Would much prefer some first hand experience.
Spending money isn't a problem, I'd just like something good and new that works right out of the box plus something new and shiny

How do you normally get a "tacho" signal?

In the "old" days, you clipped an inductive sensor around a plug lead. These days, everything is CoP!

[spitfire4v8]

yep dyno dynamics provided several ways including inductive clamps, mats to go over the engine, I made a breakout plug to like to injectors .. but that all got fed into two boxes, one a grey little box and one a big red box (forgive me if it gets too technical lol) .. before getting fed into the back of the dyno computer itself. I have nice of that equipment on this dyno and it's incredibly difficult to come by it secondhand ..
at the moment i just use the speed of the rollers with a ratio in to give a guesstimate of engine revs. I'd like something a bit better than that for the next dyno.
Thanks for all comments so far. Mike Gurney has emailed me back so he goes to the top of the pile for promptness. That's either good or bad depending on your point of view ..

[stevieturbo]

Max_Torque said:

How do you normally get a "tacho" signal?

In the "old" days, you clipped an inductive sensor around a plug lead. These days, everything is CoP!

DD and some you can tap into an injector wire to get an rpm trigger.

Or some inductive clamps will still work when placed around the low voltage wiring on COP ( my snap on light still flashes like this on most coils )

[rev-erend]

Hi Jules

My mate has a 4 wheel drive 1000 bhp by maha

It's not expensive and he wants to move it on to a good new home.

[spitfire4v8]

Hi .. sadly no need for 4wd as I only deal in small light 2wd cars, the scooby and evo and skyline guys are already well catered for
Thanks for the suggestion though, cheers.

[AW111]

I would talk to DD about options, including upgrades. It costs nothing to ask .

ps 2000 hp on a Dynotech at Summernats.


re Tachos - it gets harder every year. With multi-squirt injectors and multi-fire coils, it is not just "one pulse per cycle" any more, sadly. OBDII is great, as long as it is giving real-time data, not the value from 1/2 second ago.

[spitfire4v8]

Yep Mark at DD is going to email me some prices later, cheers.
Fortunately I still work with old-school cars so the more modern injection and ignition systems aren't things I come across thankfully, though I appreciate it must be a real issue for modern car tuners.

[geeks]

spitfire4v8 said:

Yep Mark at DD is going to email me some prices later, cheers.
Fortunately I still work with old-school cars so the more modern injection and ignition systems aren't things I come across thankfully, though I appreciate it must be a real issue for modern car tuners.

Seriously give Louis at Maha a call, I think you would be surprised/impressed!