930 intake porting

[gumba]

I picked up a 3.3 intake I need to get ported to 38mm. I also read a couple of old threads about extrude-honed to match the flow. The posts are pretty old, who is still doing this? Is this still the way to go? I was thinking of setting up the intake on my mill to enlarge the opening, but I'm getting there is more to it.

This is for my hodge-podge 3.3/3.0 motor. TK ported the heads, aluminum injector blocks and 3.0 intake (CIS). The current i/c set up has the i/c in the firewall so the 3.0 intake is fine. If I want to try another i/c in the stock position I need the 3.3 intake. I test fit a Andial/Garretson 3.0 i/c (for sale) but it sits too high.

[JFairman]

The 930 manifold is like a flat plenum chamber with 6 holes and a throttle body.
Port match the holes in the manifold to the injector blocks you already have. Doing it by hand with a die grinder is easy.

[kenikh]

Here's how I did it:

My New 1979 930 - yes, another introduction...

[Black_Hat]

Chris at TurboKraft did mine

40mm

nice job , pic's do ot do justice

Forced to Deal with This

[kenikh]

Doing it again, I'd have Chris do it.

[RarlyL8]

I'm porting mine soon to match the headwork we did. Don't plan to extrude hone as that just isn't necessary, porting should allow adequate flow for the pancake manifold design.

[gumba]

thanks.

[Alan L]

The intake manifold is magnesium so real easy to smooth out to shape.
Alan