Custom Code Reflash dyno result

[Bug_racer]

Yeah, cos like most of us, they are over the whole dyno debate...

So your happy to be manipulated ?

You just want a large figure at the end of the day

[shaneth]

Ok I have a few questions. As I'm at work can't view outside web sites.

To the boys that did the last dyno run did they put it n the throttle body for you?

I don't understand why if it's put in the throttle body every time you go there you wouldnt see the same results you would see if it was infront of the car. Woldnt it just use the same correction values just on a different IT. So my car went from being 90kwatw stock with the sensor in the same place to 131 after custom code and clutch.

If you feel so strongly that you have to post it in my thread where you could have pmed me and told me your thoughts so i could do another run. You pay and I'll quite happily take it back and do it your way. And btw don't bring guys dyno run into this thread it's got nothing to do with my run and it's just another way for you to discredit his run.

Oh and how is the sensor going to get a good reading when the fan is blasting.

[Blitzen]

So your happy to be manipulated ?

Yes I am, cos at the end of the day, its just another pineapple i have to accept. BTW, you will have to read my edit, cos my draft was a bit too much to the point...
Anyway, back OT. Congrats Shane. Food for thought.

[Sharkie]

Placing an intake manifold air temp sensor 3 feet in front of the car serves no purpose whatsoever .... LOL

You actually want to measure the temperature of the air as it enters the intake manifold. Why ? it is the only place to see what temp the air is as it enters the engine.

Ambient temperature (AT on the graph) is measured outside the car as that is the temp environment the car operates in.

Now for those that forgot ...... compressing air by supercharging or turbo charging heats up the air and the air temp (at the intake manifold) on an unintercooled turboed car is much much more than the temp 3 feet in front of the car .... LOL

Bottom line is ... Intake air temp is important and needs to be measured between the IC and the intake manifold. In fact the Polo's own IT sensor sits exactly in that location ...... .... why ... because the ECU adjusts a number of parameters on that extremely important information .....

[Sharkie]

Pretty easy on a DD , place the temp probe 3 feet in front of the car so it reads the same air the engine actually sees rather than a bull**** overcompensated figure

I'm sorry, I call BS here ..... an engine, especially a turboed one never relies on outside temp and never actually sees air as it is 3 feet in front ..... LOL

Intake air temp sensors by the manufacturers are always placed somewhere in the intake itself .... in turboed cars, always between the IC and the intake manifold. This is the air temp that the engine actually sees ....

[Bug_racer]

Placing an intake manifold air temp sensor 3 feet in front of the car serves no purpose whatsoever .... LOL

You actually want to measure the temperature of the air as it enters the intake manifold. Why ? it is the only place to see what temp the air is as it enters the engine.

Ambient temperature (AT on the graph) is measured outside the car as that is the temp environment the car operates in.

Now for those that forgot ...... compressing air by supercharging or turbo charging heats up the air and the air temp (at the intake manifold) on an unintercooled turboed car is much much more than the temp 3 feet in front of the car .... LOL

Bottom line is ... Intake air temp is important and needs to be measured between the IC and the intake manifold. In fact the Polo's own IT sensor sits exactly in that location ...... .... why ... because the ECU adjusts a number of parameters on that extremely important information .....

The ambient temp measures the temperature around the car , the intake temp should be the temperature on the outside of the vehicle before the airbox . The two should be fairly close to each other within a few degrees . If your gonna put the sensor in the intake manifold what exactly are you measuring ? How do you know that the sensor wiring thats in the piping isnt touching the hoses/pipework and transfering the heat to the sensor ? You have also by passed the intercooler so how do you know its efficiency if the correction factors are going to change the power based upon the temperature ?

The Polo uses the sensor to do adjustements , and ? When you operating a dyno your checking the cars a/f and torque levels and converting them to power . Your not making any adjustements , your checking the cars condition and its ability to turn the rollers .

Im also thinking you failed to mention the MAF has an intake air temp sensor , and on some models like the S3 / S4 there is a exhaust gas temperature probe , must of skipped your mind

[Bug_racer]

I'm sorry, I call BS here ..... an engine, especially a turboed one never relies on outside temp and never actually sees air as it is 3 feet in front ..... LOL

Intake air temp sensors by the manufacturers are always placed somewhere in the intake itself .... in turboed cars, always between the IC and the intake manifold. This is the air temp that the engine actually sees ....

You can call b/s if you like , I guess you can tell that to the guy who builds and runs dynos

As I said earlier , a dyno doesnt adjust anything , the engine ecu does so they are in no way related

[Blitzen]

And the saga continues....See what you started Shane!!!

[RhysQ]

Bug Racer, i'm sorry, i'm not very knowledgable on the whole mechanics and dynamics of dyno's, but i find it very hard to understand why an INTAKE temp should be taken anywhere but in front of the intake manifold. you say that it should be 3 feet in front of the car, but about 95-98% of the air measured 3 feet in front of the car will just pass over/under the car and is therefore not even relevant. also, the temp of fast flowing air (in real life conditions, which is what we want to know) will not be a consistent temperature, so how is that air 'in front' worthwhile measuring. shouldn't the air that is feeding actually into the intake manifold be the indicator, as that IS the air going into the engine, not what might be.

lastly, this may sound harsh, but have you EVER been happy with a dyno result that has not been done in front of your own eyes? it seems you pick on all these dyno results/operators saying they don't know what they are doing and have fudged results.

maybe its your operator/that dyno builder who is wrong? if so many trained operators are doing one thing, and very few are doing another, who would you believe is incorrect? does that guy build and run his dyno on his own theories or what reputable dyno manufacturers have spent the R&D on?

[dubbed]

Learn to ignore it kids. The reality here is that the OP can compare the modifications before and after they had taken place. It would be a different story if it was all about the peak number or if the sensors were moved at great distances before and after the modifications (code).

It's a great result, but now it's time to take it to the strip to get some times and terminal speeds!

[Sharkie]

I don't care what a dyno does with the figures it gets from an IT sensor. There are many inputs that a dyno may need and they may come from many sources. I agree that manipulating these can lead to incorrect figures.

My point is that intake temperature can only ever be measured at 1 point........ where it actually enters the engine. Anywhere else and it is not intake temp now is it?

This is how every turbo car manufacturer in the world does it. If you can't understand that then I'd be worried .....

[Blitzen]

We need to start a "Dynos, Temp sensors, and who actually gives a sh*t" Thread in Performance and Tuning, and and give a few people an automatic pistol and box of ammo to play Russian Roulette. Would be good for a laugh.

So Shane, how about that dyno sheet...

[Tim]

This is how every turbo car manufacturer in the world does it. If you can't understand that then I'd be worried .....

I think sebs point is that a dyno reads the intake temp in order to apply a correction. In other words. If it reads hot the power reading gets higher.

The manufacturer reads the temp in order to adjust the cars tune. The two things are completely different

So when seb gets his knickers in a knot about a dyno plot its for a reason. Its because he understands how these things work.

[DubSteve]

We need to start a "Dynos, Temp sensors, and who actually gives a sh*t" Thread in Performance and Tuning, and and give a few people an automatic pistol and box of ammo to play Russian Roulette. Would be good for a laugh.

So Shane, how about that dyno sheet...

Hahahahahaha thats the funniest **** I heard all day lol!

[Sharkie]

I think sebs point is that a dyno reads the intake temp in order to apply a correction. In other words. If it reads hot the power reading gets higher.

The manufacturer reads the temp in order to adjust the cars tune. The two things are completely different

Yes, agreed, and not disputing the purpose of either at all.

I'm happy with the fact (if not the result) that a dyno adjusts figures based on intake temp readings.

However, to suggest that you take readings from somewhere else and then call them intake temps and use these for calculations etc is BS.