bored out afm and larger throttle boby .

[daz the plumber]

ive heard stories that a bored out afm and larger throttle body will make the car go better .will the car need re chipping for this and if you only have the 38mm trumpet base is this canceling out the proposed mods .any one done this mod as it does not cost a fortune .i have the act induction kit and 38mm carbon trumpets .i might as well fit these if im thinking of a re chip but i would be more happy with out paying for the re map .if i need to change the trumpet base i will not bother with the mod .

[GreenV8S]

I would suggest asking the people trying to sell you the bored out AFM and throttle body what sort of gains you should expect. If they don't know then I would think long and hard before buying from them. I would be surprised if you can bore out an AFM without affecting the calibration, but perhaps somebody has managed it.

[spend]

..even then I would suspect it may be placebo on the 4.0. Apart from stroked crank the 5.0s have a lot of breathing mods - the afm & plenum top about the only items untouched... Don't get confused with mods that are applicable to the larger / more highly tuned engines.

Just buy a 500 & get it done with

[clive f]

spend said:

..Just buy a 500 & get it done with

[trackcar]

The AFM is restrictive even on a 4 litre but not by much and you'll only gain right at the very top end .. advice on a 4 litre from me is leave it alone.