Melted a piston on Wednesday and I think 89mph but I am not 100% on the speed. They had 3 spare slugs but I didn't see the bike again which was a bugger, I was hanging out for the nitro run!!!
Definitely my favorite vehicle of the meet, so far outside the square and well presented too.
Turbocharged, supercharged, intercooled, water cooled head and air shifted... then there was the father and son team aspect of the operation.
Re: Compound Supercharged Turbocharged 125cc
Posted: Thu Feb 28, 2013 5:41 pm
by dplecko
Major fuel supply issues, only managed 81.5 MPH. Would have probably been quicker if the guts of the blower and turbo were removed. 1.2 L/min flow through the float bowl obviously isn't anywhere near enough. Injection for next year.
Re: Compound Supercharged Turbocharged 125cc
Posted: Thu Feb 28, 2013 6:43 pm
by ChrisACT
That is an awesome beast. Truly an inspiration.
Bravo!
Re: Compound Supercharged Turbocharged 125cc
Posted: Thu Feb 28, 2013 8:21 pm
by Rob
dplecko,
Sounds like you're onto it already, I'll be looking out for you and your son next year!
Cheers,
Rob
Re: Compound Supercharged Turbocharged 125cc
Posted: Sat Mar 02, 2013 11:40 am
by momec3
My vote for best enginered Bike of the meet if we had an award.
Everywhere you looked at it was a bit gob smacking. Fitting all that stuff in such a small package, well done guys.
Chris
Re: Compound Supercharged Turbocharged 125cc
Posted: Sat Mar 02, 2013 10:04 pm
by ROSS BROWN
Had the pleasure of scuitneering this work of art..
yep it certainly did present well.... the essential spirit of salt racing..
The race to 100 is on....
81.500 MPH &
81.100 MPH from Mike Riddells postie..
Next year should be good...
Re: Compound Supercharged Turbocharged 125cc
Posted: Sun Mar 10, 2013 11:54 am
by dplecko
Just bought this for the mancave, doctor said it would help with the salt fever
Re: Compound Supercharged Turbocharged 125cc
Posted: Sun Mar 10, 2013 12:01 pm
by momec3
Essential equipment, hope you know what the neighbours drink
Chris
Re: Compound Supercharged Turbocharged 125cc
Posted: Sun Mar 10, 2013 4:08 pm
by grumm441
momec3 wrote:Essential equipment, hope you know what the neighbours drink
Chris
Going to need a bigger cave as well
G
Re: Compound Supercharged Turbocharged 125cc
Posted: Thu Sep 12, 2013 10:27 pm
by dplecko
Just cracked 100 runs.
Neighbours have a for sale sign up for some reason.
Re: Compound Supercharged Turbocharged 125cc
Posted: Fri Sep 13, 2013 6:07 pm
by RGV
Injection?
Dave
Re: Compound Supercharged Turbocharged 125cc
Posted: Fri Sep 13, 2013 7:57 pm
by dplecko
Yeh, M84. Complete overkill but something that could be used on other projects.
Re: Compound Supercharged Turbocharged 125cc
Posted: Sat Nov 09, 2013 8:02 pm
by dplecko
Just found probably a major contributing factor to the melted piston. Today just checked my well known high end brand fuel pressure regulator and the ratio is more like 0.8:1 not 1:1. Results in not much effective fuel pressure at high boost. To top it off the gauge i originally tested the boost reference to the regulator with has 5 PSI error, bit of problem when the base carby pressure was 5 PSI. So might of had 1.2 liters per minute at 5 PSI but at boost would have significantly less.
Re: Compound Supercharged Turbocharged 125cc
Posted: Mon Nov 18, 2013 10:49 am
by dplecko
The fuel pressure regulator manufacturer has recently upgraded their seat design of the regulator, I have one now and it is significantly better as you can see in the datalog below, the new (red trace) regulator has much control, ignoring the transients and is almost exactly 1:1 boost referenced. fuel_press_CALC is simply fuel pressure - manifold pressure.
Since added an ice inter-cooler with very good results, particularly in the mid range. Also a lot more consistent (no heat soak). Still learning the tuning and still on pump gas.
