bypass TB heating?

[axewielder]

havent driven it really yet, the exhaust has fallen off so the hours drive to work gets a bit deafening, have to drive my mk4 1.6  + smoothed out the inside of tb this week which has given better throttle responce

[Khare]

I see. Well I'll try and bypass TB before JKM RR day, should be interesting.
TB porting and polishing is also on the to do list, but wont be able to do it before the RR.

Btw have accepted you on fb 

[Ess_Three]

Which engine are we speaking about here?

I'm confused.

[Ess_Three]

Any engine management system that used an IAT sensor will read the temperature of the air...and that air is passing through the TB at such speed that it's not going to pick up any temperature!
Certainly not when driving on the open road.

The only TB I have 'bypassed' the coolant of the TB is the VR6, and I cann assure all of you you will not get any power out of doing it - 2.8 or 2.9.

You will from modifying the airbox, or modifying the TB...but not by bypassing the coolant.
I've tested it on the dyno.

[Khare]

Any engine management system that used an IAT sensor will read the temperature of the air...and that air is passing through the TB at such speed that it's not going to pick up any temperature!
Certainly not when driving on the open road.

The only TB I have 'bypassed' the coolant of the TB is the VR6, and I cann assure all of you you will not get any power out of doing it - 2.8 or 2.9.

You will from modifying the airbox, or modifying the TB...but not by bypassing the coolant.
I've tested it on the dyno.

Seems like you have done pretty much everything 


Got the before and after dyno graphs?

Because in theory, it makes sense bypassing it. The TB stays cold therefore the air does not warm up.

[axewielder]

if its hot then itll heat the air man even if it is going fast, yes it might not make enough difference to show on dyno but every little helps  mines a 2l 8v ady

[Khare]

I was asking Ess about dyno charts but would have been good nevertheless if you had some too.

just doing the little things as and when i get the opertunity

1 little thing might not make much difference, but add 5 little things put together and they all add up 

[Ess_Three]

Seems like you have done pretty much everything 

Well the thing is, I have actually done the testing, whilst modifying cars over the last 20 years...as opposed to thinking about it and achieving Internet Expert status whilst doing nothing.
From stuff I've tested, I know what works, and what doesn't...if I've not tested it, I'll not comment on it.
Simples. Christ knows it need to be for some people.

Got the before and after dyno graphs?

I've got 60+ dyno plots for my Mk3 ABF...
Probably 30 for my S3...
And numerous for mates VR6 Golfs and Corrados I've tweaked for them.

Which, specifically, would you like me to scan?

Because in theory, it makes sense bypassing it. The TB stays cold therefore the air does not warm up.

In theory yes, I agree. But the airspeed it soo high to pick up the heat when driving. It WILL help sitting in traffic though, although you then pick up heat in the TB from conduction from the manifold/head and from radiation off the ex manifold.

The theory of changing an air filter says you should get more power too...but it doesn't prove so on the dyno.

It can't do any harm...but don't go expecting miracle gains.


But hey, what do I care?
If people want to waste their time and money on crap...so be it.
If however, they want to buy or modify things that actually work and save on buying crap...maybe what I've found could help.

[Ess_Three]

if its hot then itll heat the air man even if it is going fast, yes it might not make enough difference to show on dyno but every little helps  mines a 2l 8v ady

I have no experience of the ADY.
Perhaps that will behave differently to every other internal combustion engine, or defy physics...but I doubt it.
Cold air is good, of course.
But the speed the air passes through the TB doesn't allow much latent heat transfer...even if it's very cold air going in...
Then of course, there's the people who feed it hot air from their cone filter in the engine bay!

[Len]

Will this small insignificant tweek make any difference in power of an 8v?