Does BOV affect air fuel ratio?

[DAMQIK GTS-T]

yep now where getting somewhere

some of lambos questions answered

Does those BOV that vent excess air when the throttle is shut affect the air fuel ratio?

Yes because the ecu has accounted for that air as being already in the engine

Since the throttle is shut the air getting into the engine should be the same even without the BOV.

No because the would get in when the throttle is re opened and the throttle is never completely closed the motor needs air to burn the fuel

Isn't the job of the BOV is to pretect the intake turbine from blow back pressure from shutting the throttle abruptly.

Yes and to protect the turbo from spinning backwards in the case of a backfire

Can we fix the Bov so that it comes before the AFM?

Is it even possible?

No the ecu would read the air eneering the engine twice causing a very over rich state

I do not understand how the return BOV works. If it return the excess air back into the intake doesn't it defeat the purpose of having a bov to relief the back pressure from sudden shut of the throttle?

It simply removes the pressure between the throttle butterfly and the turbo outlet on the compressor side of the turbo by putting that pressure on the inlet side between the turbo and the afm

Anyone knows about those return BOV that vent gas back? and the above post also

lambo I’m not quite sure what you mean by this question

Lambo short of replacing the ecu the only fix for the problem is by adjusting the air bypass valve at the back of the inlet as I stated in my post on the first page.

[lambo]

Thanx..

[JimX]

Originally posted by greygirl1976

yep i hate afm they sux i just need a aftermarkrt computer so i can do low 12s car shuts down{limp mode} at half track on 8-10psi

AFM sux? So, you get your fuel for free then? I like AFM's. If you need more power than the one you're using can handle, just get a bigger/better one with more resolution. MAP will almost always use more fuel than AFM with everything else equal.

[GiJOr33]

yeah.... AFM's are the most accurate way of measuring, so youdo get better fuel economy, and there are some cars with good horse power still using AFM's.... I have MAP, and it's not bad, a bit rougher than the AFM, but it's all good

[Guest generic r33]

i know nothing,

but your wrong greygirl !!!!!