mdnanwelch7(at)hotmail.co
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 Posted: Tue Apr 24, 2007 6:09 am Post subject: Make my own Turbo set-up |
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Hey All,
A little over a week ago I asked everybody for their opinion on the
"Perfect engine" or more specifically, "the Perfect Power". (to push my
MkIII) While there were one or two guys that said the 60 HP range (Rotax
582) was just fine, it appears that the basic concensus was more the 80 HP
range (Rotax 912).
Since I already have my Kolb engine (GEO 1000cc 3 cylinder, Raven
Redrive) (approx. 60 hp, 58 ftlb torque) and I am going to stick with it,
here is what I have decided to do: I am going to fabricate my OWN Turbo
set-up. First, let me say "I don't know diddly about turbo-ing
anything." But, thank God for Google search and eBay!!!
In the course of a week, I feel I have come up with enough "know-how" to
put a turbo on my GEO. Yes, there are important issues to resolve!!!
Things like;
1) Excess turbine back pressure (handled by a wastegate)
2) Surging, after you close the throttle (quickly letting off the gas)
(handled by the Blow-Off valve)
3) Proper turbo size (This isn't as critical as you might think!!)
4) Fuel/air ratio (turbos give you "tons" more air, so what about the fuel
to go along with it??)
(This is handled by the O2 sensor and the MAP sensor. The O2 sensor will
read extra lean and then tell the computer to richen up the fuel/air ratio.
The MAP, manifold air pressure, sensor also assists the O2 sensor in
detecting the correct F/A mixture)
There are, of course, other issues, but for this email they get lengthy.
I could have bought a ready-made turbo set-up from Raven ($1800), but after
doing all the research, I decided to do my own. Kind of a challenge thing.
I can certainly handle the fabrication part of the project.
And putting a turbo on an engine isn't Rocket Science!!! (It isn't, is
it??) Just kidding.
If anyone is interested in what I have come up with, let me know. Call me
435-817-1816. It's just too complicated to do by way of email. (Plus,
I'll tell you about this awesome turbo I found that doesn't need a
wastegate....brand new...$325...came on Shelbys...and really small.)
By the way, all told, I may have about $600 TOTAL to do this turbo set-up.
I should go from 60 HP to about 80-85HP. And yes, as I stated before,
Suzuki 3 cylinders came with turbos as an option in their cars a few years
ago.
Gotta get to work on my shop. Mike in SW Utah
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