looking for a 24v p-pump runner intake

Lucky Jeff said:
So does anyone have any pics of what kind of machining they do to the head to get all ports completely seperate from eachother? Or is that still super secret don't even tell your Mom kinda stuff?
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I seen pics of the LazarSmith one, it has 12 runners, it has a part that bolts to the head that divides the cylinders so its 2 inlets per cylinder, but then again it doesnt really show how is separating the siamese ports.
 
j-rod said:
The ports are not separated on a 24v like on the 12v. That is the whole crux of the "problem".
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doh... I didn't realize that. So I guess I don't have the problem then and intake runners would work fine on my engine.
 
12 valves won't fully benefit from an IR manifold unless the plenum base is totally removed or the port junctions blocked.

An individual tract from each valve to the plenum is key... obviously, long branches & generous plenum volumes are more beneficial.

This intake design for a 24 valve (i.e. the 12-IR) additionally requires the bi-furcated head ports to be modified.
 
Why couldnt you just machine off the stock pieace, then have someone lay in a ton of weld, to separate all the ports, then do your porting. Machine your flange acordingly. I realize its cast and not the easiest to do but there are guys out their whole can weld all that up properly.
 
lots of great info here.....I have been designing a 12valve intake for over a year and keep changing it and making tweaks....hopefully I can finalize it in the next few weeks and get it started.

Ryan
 
Ryan no matter how much a person keeps redesigning some thing they are never completly happy.I'm not

Dale
 
jabird said:
Why couldnt you just machine off the stock pieace, then have someone lay in a ton of weld, to separate all the ports, then do your porting. Machine your flange acordingly. I realize its cast and not the easiest to do but there are guys out their whole can weld all that up properly.
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BINGO. been there , done that. worked out great
 
My concern is that if you welded it up might it cause the head to crack and even possibly flake off and go into the motor. I have heard some pretty horrible things about welding cast.
 
welding cast can be a trick. sometimes it will weld good, other times you can chase cracks all over the place. pre heating and a slow cool down place a part too.
 
you need a really big oven and two days with nothing to do but baby sit the thing......heating it up and sloooooooooooooowly cooling it
 
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