750cc pushrod bike build

[Rchop]

New turbo installation uses 3 inch exhaust pipe with V-band clamp on the end. Elbow can now be rotated if needed or a different end can be installed when front fairing is installed.


http://www.frsengineering.com/pp166.JPG

O2 sensor will be installed in open bung when support brackets are fabricated and pipe is thermal wrapped.


http://www.frsengineering.com/pp165.JPG

[Rchop]

New BOV is adjustable and boost pressure controlled.


http://www.frsengineering.com/pp167.JPG

[willieworld]

7.B.20.     2010 SCTA rulebook        all exhaust system outlets shall be directed away from rider, the rear tire and the course surface.                                                                  willie buchta

[Rchop]

New turbo installation is complete with new support brackets installed. Bike was tested on the country road in front of the house and this one appears to work much better than the first setup. A large bug was appropriately sacrificed on the front of the turbo at high speed to insure a safe test!


http://www.frsengineering.com/pp168.JPG


http://www.frsengineering.com/pp169.JPG

[Rchop]

New dyno has been installed. I can finally get the EFI mapped properly for this bike. Should be ready for Maxton by the end of the month.


http://www.frsengineering.com/pp172.JPG


http://www.frsengineering.com/pp171.JPG


http://www.frsengineering.com/pp170.JPG

[isiahstites]

Nice job Randy!

[55chevr]

That was one fast install ... I like it ... Joe

[Rchop]

Thanks guys, I made one pass on it just to see if everything worked mechanically. I still have to load the software on my laptop and calibrate it.

[Rchop]

Success in Maxton! 4 passes made Saturday and the old record was bumped 20mph to 129 + mph. I kept increasing fuel pressure and went faster. I was planning on increasing boost Sunday morning and working into the 130's but I sold the bike Saturday afternoon and it was on its way to NY!  Joe Daly's nephew bought the bike to learn to Land Speed race. It's a great platform to slowly increase in size and go faster as you learn.

The new dyno made it a whole lot easier. I did learn something about dyno tuning though; with the type of dyno I have you can't simulate the load experienced on the track for more than a few seconds. My first pass logged at over 14 to 1 AFR when I had tuned to the low 12s on the dyno. I slowly made adjustments with fuel pressure increases since the injector timing was maxed in the WOT high rpm range. This brought the AFR down to where I wanted it and incresed my power and speed. The perfect scenario would be to put the bike back on the dyno now, and log the difference from the track to the dyno runs. This would give me a differencial to tune to on this bike for future track runs. Thanks to Todd Dross for that information. I can't do it with the turbo 750 since it's been sold, but I will tune the new one richer in anticipation of the track differencial.

So...it is on to the next, faster bike build!

[saltwheels262]

you sure don't have any problem selling lsr bikes.
good for you .

i've got 2 for sale---
  120c.i. kneedragger v twin

  222 hp zx12r

franey