Bigger Throttle Body?

[fitzy2005]

i got a vr v6 auto and i recently installed some ported and polished heads, the cars alaso got pacemaker extractors and 2.5 cat back exhuast, do you think a bigger throttle body will make much difference?

 

[blaze]

in throttle respose and pickup yes, hp no. they work real good wen u got extractors n a chip

 

[fitzy2005]

ok thanks, wot is it stock vr thorttle body? like mm, and wot would i be looking at in mm

 

[Adzzaman]

v6 is 60 an v8 is 65, and what kritical said is correct.

 

[fitzy2005]

so the 65mm will be noticeable? coz they are a lot cheaper then the 71mm ones

 

[blaze]

from what ive read man dont get a 71mm for a VR unless u got big mods. alot of people
have the problem where the car idle way to high, and the walls on the throttle body are too thin and can crack real easy unless there properly made, id stick with the V8 tb if i were u i orderd a 70mm for tha VS apparently a mm make a difference.

 

[stocky]

a bigger throttle body should help since you have the ported and polished heads. wheres greenfoam when you need him

 

[Immortality]

biggest restriction in the engine is still the valves, get some high ratio roller rockers also with the 70mm TB and replace the standard air box as it doesn't flow very well either. got any pics of the port and polish job you can post?

 

[blaze]

whats the differnce between port n polished tb and a bored out 1???

 

[fitzy2005]

biggest restriction in the engine is still the valves, get some high ratio roller rockers also with the 70mm TB and replace the standard air box as it doesn't flow very well either. got any pics of the port and polish job you can post?

i will check for fotos, ii had the stock heads beside the worked ones.. but camera played up and not sure if i can get off the camera. if i can ill post em, so rockers would be the next move you rekon be4 the throttle body??