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They mate directly to the 48 IDA bore spacing. The intakes in my case are "homebuilt billet". This seems to be easier when building for TIV were, what I can see the extensions are not needed. The extensions for the cams are not stock. You ask if the pulleys and everything else is stock. It is better to center the heads and modify the cam housing/rocker boxes to center on top of heads. Cam boxes are not modified with this offset.īUT, it is not the type of engine I would copy, if I build it again and I know of nobody else that has this version. The heads on this engine are offset approximately 2 mm each over the piston cylinder. The pump is a schadek 30 mm and the cover is GB with integral oilrelief. Same line feeds oil squirter holes over each rocker pair. One oil line to each head for bearing opressurized oil to cams. Oil squirters but has no connection to 911 heads or not. The oil system is kept as close as possible original.
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But I also LOVE Porsches, so won't loose any sleep over it Plus I would have been going Porsche had I of chosen 914 heads, anyway. I'm a purist in the fact that I love aircooled VW engines. Yet then again so will a TypeIV hi-po cam, lifters, rockers, pushrods, pushrod tubes, etc, etc, etc.Įach to their own, I always say. The pinning of the cam's won't be overly expensive, but will still cost. But I already have factory air cooled high performance heads. However, initial plans tell me the 911 heads will come out cheaper. And even though I'm still going to have to get an exhaust made, the builder will have alot more give when doing the design.Īll in all, it won't be much difference in price. They flow right, make sensational combustion. Probably another $500-1K machining and they're on my car. Now I can get a set of top quality, used 911 heads for about 1.5K landed here. Infact, they won't even be upto standard 911 head flow, combustion, heat resistance, etc. So I would have forked out a couple of grand for a set of heads which will look nice, granted, but there won't be any guarantee of them not dumping valve seats on me, let alone all the other probs these heads have. Then I've got to get them fully worked, by the right shop, with the right gear (flow benching, etc.) and at the end of it all, they still won't flow properly for forced induction use. On top of that I'll need to pay GST, shipping, taxes, etc. And thats probably in $US since we never had the cars here. Infact, I shelled out so much, just for a mint case and nothing else beyond that I will really be using.Ģ.0 or any other 914 items are worth between $500 (if I'm lucky.) and over 1K. I've already paid a fair bit for a typeIV motor. The machinist's I've asked have all said it will be no probs and the head work they can do on 911 heads compared to TypeIV items is scary MASSIVE TYPE IV wrote:You better have a Mill, a Lathe and alot of time.Those are 911 heads.ĭon't know if you'd need that much, dude. Īlthough it's functional, you have to admit: it is NOT the optimal solution to the problem. That way, you don't have to repeat the alignment dance - it's already done for you. Often times, for disassembly, you only undo the head studs and leave the heads attached to the cambox. Then, you torque down the head studs like normal. Then, you tighten (but not torque) down the little 8mm studs for the cambox to maintain the alignment. Then, you put the cambox atop the heads and move everything around a little so the dowel pins all line up. The installation procedure is that the cylinders and heads are put on as normal, but not torqued down. Įach head has two dowel pins on it for alignment and six 8mm studs (three around each valve) to the cambox. This is because the cam needs to have well-aligned things around it so the bearings don't bind up. There are only two camboxes - one per bank. The heads are held down by four studs that pass through the "floating" cylinders. the cam box doesn't attatch to the heads at the studs do they? and the cam runs through three separate cam boxes on the 911 correct? or am i missing something? thanks for all the help its definetly appreciated.Įach of the six cylinders and each of the six heads are seperate.
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I was thinking the cam box was a single unit per side not three separate units.