Proto bike getting closer to fruition....so to speak!

So here is a video I finally finished on the long term project bike. It's a 550 Yamaha Seca from 1981. So yea older engine technology, although it is overhead cam. The engine is bone stock for the exception of my polishing the piston tops for more deflection. I have a lot to read within the video which will take a lot of pausing or just replaying it. Should you be interested!

I will implement much of the tech I've established from this dude on my current rebuild of the SV650 especially if I use the SV1000 engine as I would like to get way better mileage from the bike than those engines currently get, especially in the winter. I'll have my on board ability to change PWM which even in closed loop maintains the measurement I choose on board.

Modified turbos and then some....new cycle project

 So I finally finished a little turbo rebuilding and mod video that I had been kind of working on from time to time over the past three months or so.

So as to the TURBO SV650: when the oil pump basically jammed on me, it broke the oil gear in the process and like a dumb ass, I drove it up the hill to my home. (the oil pump gears, which are three clover type rotors, lost tolerance just in wear, thus just jammed up from losing said tolerance. It broke the Teflon gear in two pieces. I replaced it with the steal one but realized I am better off with the Teflon one, as should this occur again, more damage to other components like the drive gear to the oil pump would have been damage not to mention gobs of steal grindings in the oil reservoir.) In the process I did a little damage to the journal bearings, or so it seems and probably put more wear on the rings as well.  Now I get ridiculous blow by even though there is no smoke on the exhaust and
compression is pretty decent. So I'm only guessing/ making a hypothesis that it's the excessive clearance in the journal bearing and possibly rings. I'll know for certain once I've taken it apart. The engine alone now has well over 136,000 miles. I don't know exactly anymore since the original speedometer got destroyed in the accident back in September of last year.

Now I'm deciding to either: Put an SV1000 engine in my poor little SV650 with EFI computer and all, or build an SV650 engine I have under my bench and leave it alone. But the SV650 now has a salvage title from the accident so it's just mine with no intention of ever selling it. So I'm thinking Hot Rod the hell out of it. Build a Turbo SV650 with a good title for selling.  I now have a TLS1000 that will get a turbo next spring or late winter that's also a driver now.   
We'll see how it all transpires!

Super Mod Turbo

So something a little different with the usual turbo modifications is that I realized the limitations where what after market compressor wheel was available for a specific wheel when there are so many that are used in other makes and models. Not to mention the cost of say an HE1 Holset wheel can be used in the larger TD04 housings. Certain Schwitzer wheels that are a bit larger and extended fit in some of the Garrett housings even sometimes fitting the shaft id. This of course not without some if not a decent amount of modifications to the backing plate, sleeving the shaft, and modifying the compressor housing in a few ways to make all the tolerances just right. Yes, in certain models like the above Garrett, I modify the housing as well to avoid choking. You can read more at this link.
The video on the right is a test on my Turbo SV650s where we finally got some numbers 109.50 HP and 63ftlbs of torque from a stock engine.
As to the Super Mod turbo's, some of the other improvements of course comes from the bushing material alloy that C39800 or 700 that has a higher heat tolerance with some self lubrication properties to the alloy making it ideal. Also in the way in which we machine the bushings alow for better flow especially guys and gals running thicker racing oils.
I have two blogs on turbos so here is the other one. At that sight you can get pricing on general turbo rebuilding services and some of the do's and don'ts that are common when putting a system together. This side business has become much more and a bit of fun at that.