Port Matching Intake

[toad490]

When doing a port match should I bolt the intake to the head with the gasket, or not?

[RacerHog]

Us a gasket as your templet....Or poster board and make a templet....
I think that is the easyest way to do it......Then you just dycum and scrib and grind and blend. Or weld, dycum, scribe, Grind and blend.

If you bolt them together, how will you scribe them?????

[3404spdvaliant]

From what I know you bolt it together w/gaskets snug it then drill small holes at each end through manifold/gasket/head, then pin it. locating true relation to the ports with pins.
Then take it apart dye/scribe w/gasket pined to head/manifold & grind.
This way you match head/intake/gasket & nothing can move. Install with locaters. good luck

[ehostler]

As talented as I am, there is no way that I could get a drill (not to mention a scribe) in there, while the intake is bolted to the head.

Place the intake against the gasket. Insert the intake bolts for alignment. With the gasket firmly against the intake, you can now scribe your port openings. Remember to do the same thing to your heads. If you don't, the intake will have larger ports than the head. That will cause a lot of turbulence.

[3404spdvaliant]

READ AGAIN
Do I not say to take it apart to do the dye/scribe/grind?
If you scribe & grind it by lining gasket up with loose fitting bolts on intake you will never know where the gasket has really settled in relation to port alignment when torqued.
Come on! What do you think is gonna happen with the gasket
when you put it together gasket matched on loose fitting bolts?
It's gonna move up, down, side to side leaving U with gasket/port obstruction , and ports that are larger than their mate port.
Intake Gaskets move around when rtv'd & torqued.
Hence the drilling/pins that would locate and hold it's true positioning.
All the roofs of the ports head/intake could be well aligned & floors out of align, but here you are grinding away roof according to your gasket lined up by bolts and now you just ruined an intake or heads or just have a gasket eating up flow. Ask any drag/circle track racer they'll tell you the same.

So put it together drill small hole through intake,gasket,& about 1/8 into head at all 4 corners next to runners 1,2,7,8. Take it apart line gasket up w/head ports insert pins to hold it in place dye/scribe/grind do the same for the manifold, then when putting it back together insert pins through manifold/gasket/head to hold in place then torque to 35 lbs.

[toad490]

Sorry for being dense guys but if I understand correctly I locate the gasket on the head, cut it to fit the ports and transfer that to the correct position on the manifold and then do the scribe and grind thing to the manifold.

I do like the pin idea, the web between the ports is very thin.

[3404spdvaliant]

You grind the ports of the head & intake, not the gasket.
If the gasket is smaller than the port then you need to trim/get the right gasket.
I would leave the intake ports slightly smaller than the ports on the head, just slightly.
Are these Indys or eddys? manifold same?

[toad490]

They are Indy 440-1 heads, I just got them back from Indy, they did a full port and polish, so I don't want to touch the heads. The manifold is also Indy, 4150. I'm going to use a adapter and a 1050 Dominator for the track and on the street a 4150 carb.