Forums

Happy New Year all just got back from holiday an tune in an been reading the entry form for the Nats an think its great for the hobby but my Question is how did the WT-603 carb get added to the stock Zenoah class when you buy a stock Zenoah the only carb they offer with these motors are a WT-644 or WT-257 an not the WT-603 that is an extra like the WT-929 so came some out there also help with this question .Thanks

These engine / carb specs have been copied direct from the T1 rules, it has always been there since inception, not added in later as suggested.
What difference does it make ?
We were trying to keep these specs consistent across the "stock" classes so you could use 1 engine in multiple hull applications.

Cheers, Tui.

Hi again,

I just got hold of Andrew ONeil, he drafted the original T1 and T2 remits approx 2007 / 2008, he has confirmed, and if you read note 2 regarding this in the rule book in the right context, he confirms that AT THAT TIME the stock carbs that were issued with the 230 and 260 engines were either the 603 or 644 carbs. The 257 was the allowable substitute.

Hope that squares this away !!

Cheers, ST.

This is starting to sound like a Ford vs Holden thing thing. There are many motors out there that will Blow a stock Zen away. How ever as you say Zenoha are out dated but they are the most constant brand out there in stock form. There is one model not many different variations like other brands and this makes it the perfect engine for a stock class. IMO
Cheers Matt

Hi All,

I rimind all that this was introduced approx 2008 in terms of T1, and are still not intending changes as simply not required as STILL current. The piston relief thing is NOT a performance enhancing modification, as I understand, it was simply to minimise the risk of cold seize when first running as a new motor. This went round and round at that time and I dont intend re inventing the wheel or staying on this merry go round any longer. For what its worth the piston in my Zen was not touched and the motor ran 4 + years with no work or repairs ! So with patient running in, the piston relief is not really required.
The committee will have to cross any updated motor versions if / when they appear and it actually becomes an identified issue. For now its staus quo. We are not wasting time on rumours and hear say !
I would suggest if anyone wants to pursue this argument further, then put a formal presentation to committee with the appropriate info to validate your thoughts & comment.

If petrol classes are this hard, then go glow ! They are simple as !!!!

Cheers, ST