Dyno Reading

[subie]

Hi guys,

just came back from the small dyno day around my area, tried to get the AFR from this dyno .. and end up with the paper without the AFR reading.. talked to them and they said " my exhaust pipe is too big, and no pressure at the back and oxygen is cool down.. and so on..

i saw it when my car was running on the dyno and my car lean out.. that's why i need it for the retune/remap..

is this true or they dont know how to get the read out on the paper?

waste my time/money

[xRHETTx]

Go somewhere else.

The whole point of going on a dyno is to get the AFR readout.

[Simon-S14]

well its not the whole point... but the point is to get it tuned or run up on the dyno by people who know what the f**k they are doing

[The Mafia]

did you pay them? I wouldn't have.

99.99% of dyno operators have an extension they can put on their Wideband pipe to make it go right up the exhaust. This actually gives more accurate readings.

But I have a 5inch cannon and never had a problem.

They obviously are tossers.

[Wheezy]

Could have always taken out yer 02 sensor and plugged it in there.......sounds sus

[mad082]

a lot of places won't give out the AFR's from on a dyno day for the simple reason that they will want you to come in and get them to tune it. if they give you the AFR's then you can go and make some alterations yourself, or take it to your local place to get it done. but if they don't give them out they have more chance of getting you back again to get the car tuned, so they get more money. they are a busniess after all.

[paulr33]

i agree

[MrStabby]

Unique Autos didnt have any problem supplying AFR at that SAU dyno day. I dont think any shop that is confident and competent would have a problem providing it to you.

In this particular case they gave you a BS reason for not being able to supply it, so dont go back. If their true reason is that suggested by mad, they're being dishonest with you - another reason not to go back.

[subie]

I'm not going back there for sure..

the reason I went there this morning because their shop is around my area and i just wanna get the AFR and power figure print out for the remapping in the future..

absolutely wasting my time and $$

I'm going to go to the SAU dyno day next month

Edited February 2, 2008 by subie

[Adriano]

If they cant get it to run for a dyno day, how do they tune cars??

[r33cruiser]

^^^

[subie]

If they cant get it to run for a dyno day, how do they tune cars??

I dont think they can tune the car!! there

[Duncan]

hmm I think you might all be a bit quick to judge. big diameter exhausts and 02 sensors right at the rear are a bad mix. You need them as close to the turbos as possible, the 02 sensors up the zorst can read leaner than true due to the extra air back there.

We compared 2 properly calibrated o2 sensors, one at the exhaust, 1 at the dump pipe, and the exhaust one read leaner and responded slower to changes (about 500rpm)

[Guilt-Toy]

Why the hell do people have to bag a workshop because of a silly thing like this ?

Seriously it drives me up the wall, you might as well bag every tuner thats ever touched a ecu if your going to be like this.

It was a dyno day man, seriously. the whole point of the day is a power read out, yes they should be giving AFR's if the customer asks for one (i have worked the computer at a few dyno days and its not hard) but sometimes your car does not give a correct reading, and the exaust being too big is a damn good reason.

Its a shame that your never going to go back there because those guys are probably really good at what they do, they just didnt want to hold up the dyno day to get you a AFR read out, its a mission to get 50 cars on the dyno in one day so you dont want to f**k around if you dont have to. car goes on, 3 runs.. thats it.

If you have a problem with your cannon being too big at the back (very very very common problem) then go to a exaust shop and ask them to install a bung before your cat and ask the tuner to tune from that point which will give you accurate readings.

Sorry for the rant but it shits me to no end when i hear tuners getting bagged out by someone who has NO idea what they are on about and they start to get a bad name because of it, yes i know the people who listen have no idea either.

But thats what makes the industry so hard for people trying to make a living out of it, they practicly have to charge through the roof just to keep the shop running.

I suggest you go back and talk to them, tell him you were not really too happy that you didnt get a AFR read out and that you have got the bung in your exaust now and ask if he can do you a good deal on a couple of runs! The guy will appreciate what your asking and probly do the runs for the same price the dyno day cost you.

Go easy on those guys, its not a easy job doing what they do, but someone has to do it.

[Adriano]

I agree GT, its a good way to handle it, although ive run heaps of dyno days, and IMO for the $50 people pay for 15 min dyno time, they deserve the O2 to be hooked up. Sure its not exact, but all dyno shops will have a way of mounting the extended probe((which is the biggest pain with some of the cannons)

[BHDave]

Why the hell do people have to bag a workshop because of a silly thing like this ?

Seriously it drives me up the wall, you might as well bag every tuner thats ever touched a ecu if your going to be like this.

It was a dyno day man, seriously. the whole point of the day is a power read out, yes they should be giving AFR's if the customer asks for one (i have worked the computer at a few dyno days and its not hard) but sometimes your car does not give a correct reading, and the exaust being too big is a damn good reason.

Its a shame that your never going to go back there because those guys are probably really good at what they do, they just didnt want to hold up the dyno day to get you a AFR read out, its a mission to get 50 cars on the dyno in one day so you dont want to f**k around if you dont have to. car goes on, 3 runs.. thats it.

If you have a problem with your cannon being too big at the back (very very very common problem) then go to a exaust shop and ask them to install a bung before your cat and ask the tuner to tune from that point which will give you accurate readings.

Sorry for the rant but it shits me to no end when i hear tuners getting bagged out by someone who has NO idea what they are on about and they start to get a bad name because of it, yes i know the people who listen have no idea either.

But thats what makes the industry so hard for people trying to make a living out of it, they practicly have to charge through the roof just to keep the shop running.

I suggest you go back and talk to them, tell him you were not really too happy that you didnt get a AFR read out and that you have got the bung in your exaust now and ask if he can do you a good deal on a couple of runs! The guy will appreciate what your asking and probly do the runs for the same price the dyno day cost you.

Go easy on those guys, its not a easy job doing what they do, but someone has to do it.

It's a dyno day, not a dyno comp.

If they can't be stuffed putting the probe up the exhaust they are being lazy. I've got a 3.5 inch exhaust with a cannon. It's never been a problem, it's never even been raised. And if they cant be stuffed putting a pipe up the exhaust can you honestly see them wanting to shimmy under the car to install the o2 sensor?

The whole point of these days for most people is that they want to know what their car is doing, whether it's afr's are safe, what boost it's actually running as opposed to what the gauge is saying, whether it's pinging.

Which raises another question. Did the operator hook up for a boost signal subie? Or was it a roll on strap down, run up, roll off. Tell me someone at least listened for knock.

Point taken on the bung duncan. I'm making a new front and dump pipe soon to suit a new setup so i may do this.

[subie]

The whole point of these days for most people is that they want to know what their car is doing, whether it's afr's are safe, what boost it's actually running as opposed to what the gauge is saying, whether it's pinging.

that's the point of going to the dyno day for me, i'm not after the power figure number

If they can't be stuffed putting the probe up the exhaust they are being lazy. I've got a 3.5 inch exhaust with a cannon. It's never been a problem, it's never even been raised

i've been to many dyno day with my other car (rex) they usually gave the print out between KW and Boost or KW and AFR

I think this is the 2nd time they organized the dyno day there... and i have to tell them to watch out the AFR and stop pushing my car due to the lean out!

Did the operator hook up for a boost signal subie? Or was it a roll on strap down, run up, roll off. Tell me someone at least listened for knock.

dont think so.

[subie]

just got contact from the owner of the workshop, the oxigen sensor probe shat itself partway through that day

so, he will look after me again

cheers

[Adriano]

Thats what i suspected, pretty common, as they do fall out during dyno days sometimes, and that kills them pretty quick

[Guilt-Toy]

well thats good, i would sugged you get the sensor bung welded in before you go to get accurate readings, they cost around $5 each or less and its about $20 to get it installed at any exaust shop, if you go into the shop and tell them what you want they will be able to order it in and fit it for you.

good luck, post the dyno sheet if you can.

just got contact from the owner of the workshop, the oxigen sensor probe shat itself partway through that day

so, he will look after me again

cheers