Just got back from WA where I picked up the Feb issue of SPEED magazine. There is a couple of pages on the Memorial Cruise for the occupants of EVLR34.
Brett-32i is right, the vacuum comes after the throttle butterfly, brake boosters however have enough vacuum stored for at least 2 -3 brake applications.
From memory you are allowed around 10% difference between cylinders, meaning between 1 & 2 , 2 & 3 , 3 & 4 , 4 & 5 and 5 & 6 not between 1 & 3 or 2 & 6 for example.
You know my car is set up wrong because your car is the ants pants.
Give us a break.
Your car will respond quicker, but you have set it up wrong
Show us your proof
A POV will not vent on throttle liftoff. A BOV will.
They’re not the same thing.
As for racecars not using BOV may be correct. If you think about it, a champ car uses SWOL (Shift With Out Lift) so a BOV is not really needed here, but if the driver tries to turn up the boost to far in a race the POV will stop him exceeding the regulation limits.
As for a road car with the constant lifting of the throttle in everyday driving conditions a BOV will assist in a quicker spool up of the turbo.
Roy is correct.
A Pop off valve is fitted by the governing body in motor sports and is compulsory, where a BOV valve is not.
Two totally different operations.
POV's are to stop race teams running more than a pre-set amount of boost as defined by the governing body.
A BOV is fitted to help reduce turbo spool up time after a throttle close.
Your keep telling us you have the proof that the BOV's do nothing and challenge anyone to prove otherwise.
You Sir have not yet shown any proof to the contrary.
Posting VDO's and links to other (which is you again telling it how it is)forums does not prove squat.
Post your proof here and make us all look stupid, at the moment your talking through your (for the lack of a better term) :shake: ...
Oh
forgot to mention, it has a stock BOV because unlike the full time race cars, I dont strip and rebuild my engines every few meets, nor do I use a sequential gear box where you dont lift off the throttle...
Matty it won’t damage anything if you block the little hole in the bottom of the stock BOV, but it will be difficult to feather the throttle especially in lower gears.