ESE's works engine tuner

[TZ350]

The Arrow race engine I did with pipes for a guy here in Tauranga

And here it is, beautiful job too.

[speedpro]

Hard case. Binning a 24.8hp cylinder.

[mr bucketracer]

And here it is, beautiful job too.

when it went it was good but seem to have alot of promblems cause he had a srewdriver in hand to much . lovey bike

[Drew]

Hard case. Binning a 24.8hp cylinder.

I raised an eye brow too.

Is that because the stuff the port floor is now made of, won't last?

[TZ350]

TS125 Exhaust Port



Rick with the exhaust port I figure, raise it to 25mm from the top of the cylinder and widen it to 40mm at the top and leave it the original width at the bottom.

We can set the port timing at work to open at 80 deg ATDC accurately using a degree wheel and the width at 73% when finishing up and radiusing off the edges.

[kel]

TS125 Exhaust Port

Rick with the exhaust port I figure,

Bloody hell, I go away for a few weeks and you're tuning the competitions bike. Wait, team mate

[Frits Overmars]

When I first tried the Triple Exhaust I got 29.5 rwhp (I had previously done better with a single port at 31 rwhp)

1 Tried to improve the Triple Exhaust and it fell to 18.6

2 Raised the exhaust port floor and went from 18.6 to 24.8

3 Thrown the cylinder in the bin and started again.

You work too hard, TeeZee. Leave out step 1 and step 3 and you'll end up with a clean bin and 37.7 rwhp

[RomeuPT]

When I first tried the Triple Exhaust I got 29.5 rwhp (I had previously done better with a single port at 31 rwhp)

Tried to improve the Triple Exhaust and it fell to 18.6

Raised the exhaust port floor and went from 18.6 to 24.8

Thrown the cylinder in the bin and started again.

I have to read better what you posted before...

[F5 Dave]

Just to invalidate testing, perhaps in test 1 there was some issue where the ring seal was disturbed. Who knows, that's the problem sometimes without following a methodical approach which is the luxury of perhaps those full time employed to do so. The rest of us just have to hope for consistency.

[wobbly]

Look closely at the toolbox item on the floor in front of the bike - says it all really, as this was used to set the spark gap on BR9 plugs run at over 17:1 on Methanol.

[twotempi]

I assume you are referring to the rather large hammer !!

[twotempi]

Was a pity really as it had all the potential but never really lasted a race weekend. They used to turn up on Friday all bright-eyed and bushy-tailed for practice. By the afternoon the cylinders were off. On Saturday it would run in practice but in the afternoon seldom finished a race. On Sunday it became a display bike.

Would have very disappointing and fustrating to be pit crew. They seemed to be trying everything, but it was what I call a 'rainbow bike". Never got to the pot-of-gold at the end.

The old story - Get something simple running first , and be clever later. AND !! don't do your tuning/development at the track !!

[wobbly]

More disappointing to spend over a week grinding, welding & designing pipes, doing the crank balance etc, to have it run just fine ,once, on petrol.
Then as you say, tuned to death by people way cleverer than I could hope to dream of.

[Haufen]

When I first tried the Triple Exhaust I got 29.5 rwhp (I had previously done better with a single port at 31 rwhp)

Tried to improve the Triple Exhaust and it fell to 18.6

Raised the exhaust port floor and went from 18.6 to 24.8

Thrown the cylinder in the bin and started again.

I am pretty sure you did, but just in case: did you check the ignition timing with a strobe light each time? 10-15 degrees off could have the same effect.

[kel]

AND !! don't do your tuning/development at the track !!

I dont understand. Surely the track is the perfect place for final tuning, its also the best place to try development mods. Its all good and well to prove concepts through simulation and to carry out tuning on the dyno but its the on track performance that matters and that means tweeks, some of them less than minor. That big hammer may be an over kill though