Sorry guys, none for sale and no plans to make them available. There's a lot of machining to fabricate it the way that I did it but it worked because I had my college machine shop there and some help from a generous co-op employer. I thought on it for a while and I can't see making many of these the way I did; you'd have to do some more thinking on the design.
And of course most of the design was done as it was to accommodate the two banks of injectors and I imagine the crowd interested in those would be even smaller than the crowd interested in injection....
***Bare in mind I haven't run this thing yet so while I've researched this stuff I seen it myself (yet)***
Plenum volume: I chose mine on ease of fabricating since this is my first project and I'm doing this all on my own.....can't expect the world yet. I've seen it one or two places but
www.grapeaperacing.com has it summarized decently:
"There is not going to be a simple answer to
the needed plenum volume for a given application or rpm range. The good thing about plenum volume is that there is a pretty wide range that it can be and still be effective, so general rules work well. The following guidelines are for engine operating in the 5000-6000 rpm rage.
V8's with one large plenum feeding all 8
cylinders does not work all that well as far as the Helmholtz resonator goes, but if this is the case, plenum volume should be about 40-50% of total cylinder displacement. On a four cylinder engine 50- 60% works well. For 3 cylinders (6 cylinder engine with two plenums), each plenum needs to be about 65-80% of the 3 cylinders it feeds.
If a boost is desired in a higher rpm range,
closer 7000-7500 rpm, the plenum will need to be
10-15% smaller. To get a boost in the 2500-3500
rpm range, it will need to need about 30% larger."
I don't have the numbers in front of me but my plenum ends up being something like 200% of what it needs to be. For that reason I left the ends caps as sealed joints rather then having then welded; I intend to add ballast volume (gasoline resistant plastic maybe? not sure) as a tuning and experimenting means. In this particular case it is easier to remove volume than add it (as many do with throttle body spacers).
I would recommend the Grape site. I waited forever for Jeff Hartman's Engine Management book (for the computer stuff) and who do they basically copy/paste for the intake section.....grape....
Douglas Carbonera - awesome looking setup man, just awesome. Someday I'm going to be into cars the way you are.
Right now I'm broke, just done school and no job yet, so it is all about turning wrenches while savings money and doing all the work myself. Which is its own challenge but I won't feel too bad when I can actually afford a decent head and a turbo....
take care guys - I'll keep at it so I have some pictures for you soon
