day dreaming out loud, building a small six? Options

[VaccaRabite]

Every now and again, I get it in my head to build a small 6 for my 914. Either a 2.2 or a 2.4. Either engine would be built up to the "S" type specs, though probably carburated as I don't want to deal with MFI, and at this point have a pretty good understanding of how IDF style carbs work.

While driving my 914, I tend to drive it differently then I do my daily, keeping the engine revved up. This is NOT how I thought I would drive it. (IMG:style_emoticons/default/laugh.gif)
The idea of a small bore high revving engine really tickles something in me.

Could anyone here breakdown the costs involved with taking a tired old 2.2T or 2.4T motor and building it out to S level to have a peaky but potent 190ish HP? I would be doing all the labor, save machine work, myself.

I am not as concerned with the costs of the oil tank, engine mounts, etc. I know about what that stuff all costs to get, and where to go about finding them. I am more interested in just the parts and costs associated with rebuilding the small bored 6 plants.

This would be a build taht I might start collecting parts for now, but would not start for probably a year or longer as I DO want to have my m715 running at some point in my lifetime. (IMG:style_emoticons/default/laugh.gif) I am putting my 914 on the same restriction that I had the truck on. No major changes to the 914 now until the truck is road worthy.

Zach

[VaccaRabite]

If I used a 2.7 case and the 2.0 crank to make a 2.5, would I be able to use CIS instead of carburators?

I don't want to deal with MFI, but I would like to learn CIS.

Zach

[ArtechnikA]

If I used a 2.7 case and the 2.0 crank to make a 2.5, would I be able to use CIS instead of carburaetors?
I don't want to deal with MFI, but I would like to learn CIS.

CIS doesn't care much about displacement.
What it cares about is valve overlap.

Porsche ran CIS and the very mild cams it requires because they had to meet emissions.

You may be able to run a 964 cam profile with CIS but that's about as extreme as you can go. I donno why you'd want to go to all this work and expense just to kneecap the performance by using an antique injection system.

You want to learn CIS - get a mid-80's VW like a Jetta GLI or a GTI.

Unless I had some reason to go period-correct (i.e. concours or vintage race classification) I couldn't see a reason to consider CIS.

And yes - plus or minus a little - cost is not a factor of displacement.

The cast aluminum cases would be desirable if you were making a turbo or race motor, but a 7R with the Competition Engineering work is fine for a street motor IMO. (There's a machine work needed to make a 2,0 aluminum case work with bigger bores, and it still needs the intermediate shaft bearings cut, the scavenge mod, and piston squirters installed, so it's no free lunch.)

I think I were going to build up an engine (aside from the period-correct 2,8RSR in my plans...) it'd be based on an SC. Bulletproof aluminum case, many plentiful parts. It may not rev like a short-stroke engine but there's a limit to the appeal of going zoom! Zoom! ZOOM!! in the parking lot...