Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => BMPRS - British Model Powerboat Racing Society => Topic started by: Brigadair on September 14, 2014, 08:21:10 pm
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1048 walbro carb needle settings?
Just wondered what people used and thought best?
H 1 and 1/8th, low 1 and 3/4?
Or
H 1 and 3/4, low 1 and 1/2??
Or somewhere I between?
I realise settings depend on many factors, pipes, pipe lengths, props, etc etc.
Just wondered if any favoured settings?
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Hi Garry
When I bought my Zenoahs from Dave Marles, both the stock engine and his tuned Zen 7 (old hat now perhaps), his recommended settings were richer on the idle needle and leaner on the high speed needle. His recommended settings proved bullet proof throughout the throttling process.
I can not comment on the latest tuned engines and bigger bore carbs. I guess it is down to trial and error unless folks are willing to share key experiences %%
Craig
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Thanks Craig.
What setting do you run on low and high needle?
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Stock setting was H 1 3/8 low 1 1/2
Im running H 1 1/2 and L 1 1/2
The 1048 carb has alot of settings that work... Look at car forums and they are different again.
i found i kept getting a bog on Low when the High jet was rich.
Jack
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during sunday my settings on K30 were
H 1 1/2
L1 1/2
changed it to
H 1 1/4
L 1 1/2
This will probably change again with abit more fine tuning to do and also modded the air intake into hull ;)
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2 on the low and 1 on the high :-)) if it bogs down on low revs go and 1/8th of a turn in on the low but please remember to go an 1/8th of a turn out on the high,,,,,, :-)) :-))
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Magic No. is (3) like Kurt suggests but you have to find the combo............for me its 1.1/4H x1.3/4L useing Walbro 257 std carb... you could try the WYK 33. now thats a different ball game..and a lot better .....JMHO
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Thanks Craig.
What setting do you run on low and high needle?
Hi Garry
Sorry for not replying sooner. My settings are Low Needle 1 and 3/4, High Needle 1 and 1/8. However bearing in mind that I am running the smaller capacity Zen7, with modded Walbro 257 carb and submerged drive, I suspect my information will be about as much use as a chocolate fire guard! {:-{
The comments from others have been very helpful and interesting to read. Thank you to all of you :-))
Craig
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Hi all
Thanks for your honest replies on carb settings.
I'll add that lot into e mix soon. Your advice appreciated,
One thing that is apparent is that the 1048 carb is quite a flexible bit of kit, in more ways than one.
Hope to see as many of you as possible for a great racing venue at Leicester this Sunday.
Cheers
Garry
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And yes what a great day it was at Leicester!!! See BMPRS.CO.UK for full results and pics!
Garry