Tz350 new engine idea. Will it go bang?

**bucketracer** · 25th March 2010, 20:28

Originally Posted by SS90

Come on, put up or shut up.

Ok piss and wind, you already owe Thomas, so payup or shut up

**SS90** · 25th March 2010, 20:30

Originally Posted by bucketracer

You owe Thomas, Payup or shut up

Post a video and dyno run of your daddy's latest abandoned project, or I am not going anywhere.

**bucketracer** · 25th March 2010, 20:37

SuperStupid I don't think you have got the readys and you probably couldn't understand what you saw anyway.

**SS90** · 25th March 2010, 21:19

why do you turn everything into a bitch fight. I remember we used to have a guy from Ireland who wanted to introduce buckets there.......he contributed to Bucket threads...... he's gone..... he posted something referring to "Dick measuring teenagers"...then he never appeared again.

For the love of god, grow up.

**bucketracer** · 25th March 2010, 21:23

Originally Posted by SS90

I remember we used to have a guy from Ireland who wanted to introduce buckets there.......he contributed to Bucket threads...... he's gone.....

Discovered Girls.......

**bucketracer** · 25th March 2010, 21:25

Originally Posted by SS90

why do you turn everything into a bitch fight.............

Not man enough to finish what you started, I said you would start blubbering soon.............and was right

Originally Posted by bucketracer

Ohooooo didums you will be running of to mother again like you did last time I kicked your arse.........

......you big cry baby

Probably time for you to put up something useful or shutup

**SS90** · 25th March 2010, 21:37

And you just killed another thread.

Thanks Genius.......

**bucketracer** · 25th March 2010, 21:38

Originally Posted by SS90

Thanks Genius.......

Thats more like it..........

**fi5hy** · 26th March 2010, 07:06

more more more I say

**Buckets4Me** · 26th March 2010, 22:59

Originally Posted by fi5hy

more more more I say

you like a good thread bashing do you ??

kinky bastard !

next you will tell us how good those chinese engines are

**craisin** · 27th March 2010, 00:45

get a grip take it to the tip get it off the truck with a flip

**Buckets4Me** · 28th March 2010, 07:20

Originally Posted by SS90

Thanks Genius.......

so true so true

Originally Posted by TZ350

Only because you and Squiggles have asked. I thought it was only that twit SS90 that was interested.

I can say that it didn't blow up and its first dyno test session, if not spectacular was at least encouraging.

Its the first cut and I would have liked to have completed some more development........

A lot of our recent work was inspired by some sensible and constructive posts earlier from Sonic_V they are worth another look….……

This is from memory, and remember Johns dyno only graphs rwhp against road speed so rpm has to be calculated.

The original engine with a std 24mm carb and an inlet duration of 225deg made 19+rwhp at 11,250 rpm.

The same engine was fitted with a barrel that has enlarged transfers and a reduced exhaust duration as suggested by SS90 and a 24mm venturi carb as suggested by Sonic_V which was fitted conventionally on the side, it made 21+rwhp at 9,500rpm. It ran best on a 130 main jet and was a strong runner at Taupo.

Same engine, same carb same 225deg inlet duration but with the plenum chamber, it was frighteningly fast up the drive on Taupo gearing but suffered badly from a flat spot below the power band at about 4-5k rpm.

Sonic_V in one of his early posts had suggested an inlet closing point of 60deg ATDC, for a duration of 205deg.

Same plenum engine, same carb but with 205deg inlet duration it still suffered from a lesser but significant flat spot below the power band at about 4-5k rpm.

Reducing the closing point to 45 then 35 degrees ATDC for a duration of 180 reduced the flat spot but it still made the bike unrideable in competition.

Increasing the inlet tract length inside the plenum by 35mm cured the flat spot and it was rideable on the track at Mt Wellington in the wet.

Now Dyno Time….

21+rwhp at 9,500 rpm from the conventional engine with 225 deg inlet duration Sonic_V venture carb SS90 barrel, Honda RS125 chamber and 130 main jet.

20+rwhp at 8,500 rpm from the same engine fitted with the plenum and 180deg inlet duration and it ran best on a 185 main jet.

Interestingly the plenum engine made much more hp below the power band, about 4-5hp every where and this extra low down grunt probably accounts for the wheel spin when giving it some big throttle during testing at Mt Welly.

Testing stopped when we realised that there may be a lubrication problem as most of the pre-mix oil was being left behind in the plenum. To do any more development I will have to build an auto lube motor to go with the plenum.

As the BMEP for 20rwhp at 8,500 is a whole lot better than for 21 at 9,500, it will be interesting to see where the plenum idea goes with more inlet duration and barrel/chamber mods as suggested by Sonic_V for max power at 10,500.

Team ESE are building some new chassis and I have taken the plenum off old Blue to use in the new bike.

So there you have it, encouraging but not spectacular….. "yet"………

Gentelmen do you want to place your bets?

well I guess it's still on then
bring on Taupo 2010

**fi5hy** · 28th March 2010, 07:25

Loncin

**Henk** · 28th March 2010, 07:32

You do realisse that with your filthy chineese diesel you are single handedly responsible for global warming.

On a brighter note, whats the outcome of the sweep? It didn't go bang, it did go thud and it didn't clean up. Does that make my maybe vote the most accurate?