Compound Supercharged Turbocharged 125cc

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ROSS BROWN
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Re: Compound Supercharged Turbocharged 125cc

Post by ROSS BROWN »

That is seriously funny :D
After the fifth time I watched it .. I worked out were the music came from.. 8)
Once again.. Will tip the "can" for ya, .....make it to friday.... :shock:
IT IS ALL A RACE AGAINST TIME.
TIME WAITS FOR NO ONE.

HOW FAST CAN YOU GO ?

S/UF 925
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RGV
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Re: Compound Supercharged Turbocharged 125cc

Post by RGV »

:shock: :shock: :shock: :shock: :shock: :shock:

Dave

Last Minute Racing
DLRA #928

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
2016 MPS/F 250 114 MPH (RECORD)
2017 MPS/F 250 DNF
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gennyshovel
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Location: Broken Hill

Re: Compound Supercharged Turbocharged 125cc

Post by gennyshovel »

I'm thinking of moving into the soon to be vacant house next to yours Dave :D :D :D
Tiny DLRA# 484
Postiebike Racing , created & funded by TwoBob Engineering
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AuotonomousRX
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Location: Eyre Peninsula SA

Re: Compound Supercharged Turbocharged 125cc

Post by AuotonomousRX »

Brilliant 35hp Postie Bike :lol: :lol: :lol:

Over to you Don and Mike, who will tip the "can" the furthest by the Friday session :wink:

Pete
Still trying to decide if I am a procrastinator

Pete :?
DLRA #866
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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko »

Sorry couldn't resist sharing, sending this hand crafted water cooled billet piece off to poetonaptec ASAP.

Aluminum conducts heat many times better than iron and billet aluminium conducts heat about 3 times better than cast aluminuim.

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RGV
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Re: Compound Supercharged Turbocharged 125cc

Post by RGV »

Thats a work of art. Well done.

Dave

Last Minute Racing
DLRA #928

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
2016 MPS/F 250 114 MPH (RECORD)
2017 MPS/F 250 DNF
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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko »

So I wasted the small turbo, luckily these are relativley cheap and there was no other follow on damage. Judging by the premature bearing wear I guess the oil pressure needs to be higher than the boost pressure (depends which way you want the oil to flow I suppose).

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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko »

Plated cylinder arrived today, unbelievable service and turnaround time. Sent 7th Jan, that makes it 3 weeks door to door. Not sure I carry enough fuel to be able to melt it, but I'll have a good go.

Oil pressure to the turbos has been increased and an additional filter stage added (custom full flow magnetic).
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w3stie
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Re: Compound Supercharged Turbocharged 125cc

Post by w3stie »

I'm waiting to hear how this little screamer went.
Rob
DLRA member # 1187
Rob
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Joined: Wed Jul 06, 2005 5:30 pm
Location: Richmond, NSW. DLRA #888

Re: Compound Supercharged Turbocharged 125cc

Post by Rob »

1173 David Plecas 1992 Honda CT110 125cc A-BF BLUE (Open Record)

Monday, GPS track 83.3, 89.6mph
Tuesday, Long track 92.774mph
Thursday, Long Track 111.476mph

When I spoke to Dave on Thursday am he told me he'd screwed up the boost a further 10hp.. to put that into context, a CT110 makes 7.6hp in standard form!

Well done Dave and crew (family!)

Cheers,
Rob
I owe, I owe, so off to work I go.
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w3stie
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Re: Compound Supercharged Turbocharged 125cc

Post by w3stie »

Rob wrote:1173 David Plecas 1992 Honda CT110 125cc A-BF BLUE (Open Record)

Monday, GPS track 83.3, 89.6mph
Tuesday, Long track 92.774mph
Thursday, Long Track 111.476mph

When I spoke to Dave on Thursday am he told me he'd screwed up the boost a further 10hp.. to put that into context, a CT110 makes 7.6hp in standard form!

Well done Dave and crew (family!)

Cheers,
Rob
Well done indeed! That must be the world's fastest postie then!
Rob
DLRA member # 1187
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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko »

Can't figure out what happened half way through the last run, dropped about 250 RPM for some reason, then starts to pickup again towards the end. The only thing I can see is the engine temperature stops rising as fast at exactly the same time, EGT, Boost, etc, everything else looks great. Initially I thought it was the water pump kicking in and cooling down the head too much, however the Lo Temp is set to 70'C (Sets the engine temp below which the pump will be at minimum speed). Maybe there is something in the motor that doesn't like > 11,000 RPM, power falls, RPM drops, whatever it is cools down and away she goes again (valve springs heating up, or piston beginning to nip? :oops: ).

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Greg Watters
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Re: Compound Supercharged Turbocharged 125cc

Post by Greg Watters »

They dont fix themselves ,
keep cross referencing your info, are voltages consistant ? fuel pressure?


or external forces
Did you run into some damp salt that dragged your rpm down , or a head wind ,

or rider input,
lifted your head , or put your knees or elbows out slightly
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dplecko
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Re: Compound Supercharged Turbocharged 125cc

Post by dplecko »

I didn't notice this before, but zooming in on the air temperature after the intercoolers clearly shows the same trend in temperature rise slowdown. After reading Gregs comment about headwind, the best theory i have to date is that a gust of cold wind came along and slowed the bike down. The headwind only accounts for the temperature drop if it was somewhat colder. So much to learn in this game.
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