When to switch to a bigger intake valve?

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When to switch to a bigger intake valve? #1544085 12/05/13 05:51 PM 12/05/13 05:51 PM
Joined: Aug 2006 Posts: 610 long time lurker, short time p... P PorkyPig OP mopar
PorkyPig OP mopar P Joined: Aug 2006 Posts: 610 long time lurker, short time p...	I know from some old ported iron heads that putting in a bigger intake valve "just because" won't necessarily make much difference. But for something like an Indy SR or EZ (or a regular Victor for that matter), when would it make sense to switch from the standard 2.19 to a 2.25 intake? Would it be based on cam lift, or how much porting the head has or what other things would determine if it is a good move?

Re: When to switch to a bigger intake valve? [Re: PorkyPig] #1544086 12/05/13 05:58 PM 12/05/13 05:58 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	To me its the amount of porting... you could have .900 lift but the choke point would still be the head weather its the valve or porting(along with the intake and carb)... but I'm sure that most head porters do as much as they can then try a larger valve just to see

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