Compound Supercharged Turbocharged 125cc

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Rob
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Location: Richmond, NSW. DLRA #888

Re: Compound Supercharged Turbocharged 125cc

Post by Rob » Thu Feb 28, 2013 4:55 pm

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.

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I owe, I owe, so off to work I go.

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Thu Feb 28, 2013 5:41 pm

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.

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ChrisACT
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Re: Compound Supercharged Turbocharged 125cc

Post by ChrisACT » Thu Feb 28, 2013 6:43 pm

That is an awesome beast. Truly an inspiration.

Bravo!

Rob
Posts: 1092
Joined: Wed Jul 06, 2005 5:30 pm
Location: Richmond, NSW. DLRA #888

Re: Compound Supercharged Turbocharged 125cc

Post by Rob » Thu Feb 28, 2013 8:21 pm

dplecko,

Sounds like you're onto it already, I'll be looking out for you and your son next year!

Cheers,
Rob
I owe, I owe, so off to work I go.

momec3
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Location: Cedar Grove Qld

Re: Compound Supercharged Turbocharged 125cc

Post by momec3 » Sat Mar 02, 2013 11:40 am

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
Chris

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ROSS BROWN
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Location: COORPAROO BRISBANE

Re: Compound Supercharged Turbocharged 125cc

Post by ROSS BROWN » Sat Mar 02, 2013 10:04 pm

Had the pleasure of scuitneering this work of art..
yep it certainly did present well.... the essential spirit of salt racing.. 8) 8) 8)
The race to 100 is on....
81.500 MPH &
81.100 MPH from Mike Riddells postie..

Next year should be good... 8)
IT IS ALL A RACE AGAINST TIME.
TIME WAITS FOR NO ONE.

HOW FAST CAN YOU GO ?

S/UF 925

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Sun Mar 10, 2013 11:54 am

Just bought this for the mancave, doctor said it would help with the salt fever

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momec3
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Location: Cedar Grove Qld

Re: Compound Supercharged Turbocharged 125cc

Post by momec3 » Sun Mar 10, 2013 12:01 pm

Essential equipment, hope you know what the neighbours drink :D

Chris
Chris

grumm441
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Re: Compound Supercharged Turbocharged 125cc

Post by grumm441 » Sun Mar 10, 2013 4:08 pm

momec3 wrote:Essential equipment, hope you know what the neighbours drink :D

Chris
Going to need a bigger cave as well
G
They make it
I make it work

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Thu Sep 12, 2013 10:27 pm

Just cracked 100 runs.

Neighbours have a for sale sign up for some reason.
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RGV
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Re: Compound Supercharged Turbocharged 125cc

Post by RGV » Fri Sep 13, 2013 6:07 pm

Injection?

Dave

Last Minute Racing "its a 2-stroke ya twit - Its supposed to smoke"
DLRA #928
SATA #10

2010 MPS/G 250 118 MPH:)
2011 Washed Out:(
2012 Washed Out:(
2013 MPS/G 250 131 MPH (RECORD):)
2014 MPS/G 250 140 MPH (RECORD):)
2015 MPS/F 250 DNF:(

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Fri Sep 13, 2013 7:57 pm

Yeh, M84. Complete overkill but something that could be used on other projects.

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Sat Nov 09, 2013 8:02 pm

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.

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Mon Nov 18, 2013 10:49 am

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. 8)

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko » Thu Nov 28, 2013 12:17 am

Here's that bloody boost gauge again:

http://www.youtube.com/watch?v=1_30paiAA3s


Click here to learn how to add YouTube Videos to your phpBB forum

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.

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