What size are std efi inlet ports

[darky82]

Hi, wondering if any one has info on 5.0L efi inlet manifold intake runner sizes looking at buying a ported inlet manifold but the port size is 28mm x 50mm with a 70 mm machined thottle body, i measured my old gasket and its 31mm x 63mm my stock manifold seems bigger or is that just how big the gasket spacing is

 

[mr j-man]

Hi, wondering if any one has info on 5.0L efi inlet manifold intake runner sizes looking at buying a ported inlet manifold but the port size is 28mm x 50mm with a 70 mm machined thottle body, i measured my old gasket and its 31mm x 63mm my stock manifold seems bigger or is that just how big the gasket spacing is

maybe measure ya stock manifold...if uv still got it! i just had mine off to do the gaskets but its all bolted back down now...sorry bud!

 

[sporty custom]

my stock manifold was 26x50

 

[darky82]

thanks champ..

 

[Commydoor]

i thought porting heads and manifolds was to bring the outlet shapes out to the gasket measurements to give a cleaner and higher flow of air...your not gonna gain much with a 2mm increase on one dimension only...just bolt up the 70mm throttle to your standard manifold, the gains will be about the same anyhow and cheaper...

 

[soop]

Not much gain with 2mm?
Totally depends where you take the material from.

 

[Immortality]

Not much gain with 2mm?
Totally depends where you take the material from.

or loose if you take it from the wrong spot

 

[darky82]

Think i will just get mine done to match, got my heads today and they are 32mm x 50mm , was looking at the intake chanber and there seems to be still a bit of meat on the sides just inside the opening, can this be removed with no side effects or is it not worth the hastle

 

[Commydoor]

Not much gain with 2mm?
Totally depends where you take the material from.

i think you missunderstand what ive said but you do carry on dont you...please give me the benefit of your wisdom as to why 2mm is a substantive gain for the cost involved...and dispute that matching the heads and manifold to the gasket size doesnt give better or cleaner flow...

 

[ari666]

substantive

we making up words now?

2mm could be loads. could be a gain of a few cc's if it was somewhere where it shouldnt be. but all depends on the final shape and finish of the port.