Fantom

On a perfectly set up car, how much fuel does a vta waste? compared to having an uprated re-circ??
From an engine performance perspective, what would be the better one to have? The bov I have is an HKS SSQV thingymajiggy. I'm looking to swap it for an uprated re-circ, but want to know if there's any point?

Cheers
Steve

axgt_bwaii

iTrader: (6)

ive never noticed any diffirence. vta or recirc.

stew

Elmer Fudpucker

well normal folk wont be able to tell if a complete bell-end is approaching if you don't have a noisy dumb valve,will they?

axgt_bwaii

iTrader: (6)

i hope your not starting!

[Davey]

VTA will use more fuel due to the position of the MAF in relation to the DV and throttle. Shouldnt be noticeable though.

The Rig

iTrader: (13)

Any pics of engines with VTA and standard ?

im not sure what im looking for and am building up a database in my head LOL

cheers....

Brit_in_Japan

Fantom, the VTA will not use any more fuel than a recirc. The reason is that air is vented upstream of where the fuel is injected. The mixture immediately after venting will be over rich, not because of too much fuel but because of too little air.

VTA's upset the correct fuelling of the engine for a limited period after it has vented. This cannot help performance. So if anything, moving from a VTA to recirc dump valve will improve fuelling during gear changes.

[Davey]

Ditto as above, perfect explination..

Fantom

So basically its not worth changing at all??