Speedloader
Well-Known Member
- Messages
- 51
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Thanks, there seems to be different oppinions about the 1107. I have read that actually some changes from 1107 to 990 on g320 and g340. But i don't know as i haven't tried.Your better off with a modded 1107 over a rt990.
Well its not a tuning issue as i have tried a lot of needle settings. Its maybe just me beeing sensitive about it, its not that bad, its just not reacting that fast. But surely faster with the 771 than the 990.I'm not running a super fast servo, so maybe I'm not feeling such a dramatic delay. But there will always be a "delay" in throttle response compared to an electric. Volts move through a system faster than go juice. That being said, you're delay may also be a tuning issue. Without a video showing the actual response times, it's impossible for me to make any kind of judgement.
OBR uses unmodified WT-990s for all of their 30.5 Full Mod Reed Case Engines and continue to use them on the 32-34cc version as well. I would imagine that if they saw the same problem, they would not use them, or offer some form of mod for these carbs. These guys have been tuning and modding these motors for almost 2 decades, so they know the score.
If you think this lag is a bit too much, you might want to reach out to them to see if maybe they can offer some tuning advice if you are running a 990 or 1107.
Hopefully you find something that will hit all the notes for you!
Alteady cut some coils and pressure tested it to 16psi@Speedloader If you are running a WT-990 or WT-1107 and want to do a pop off mod, the WT-257 spring will do the trick if you aren't willing to clip some coils. This should drop your pop off to lower than 19 PSI. The carb is discontinued, but I did some digging and found one for ya: https://www.jackssmallengines.com/jacks-parts-lookup/part/walbro/983047 and you can buy a 5 pack here: https://www.mowers4u.com/983047-pack-walbro-metering-springs-p-2775.html.
This is the spring that was recommended for the 990/1107 for 30.2 Reed Case motors according to my research.
Yea i know. Tried the 813 and i think the 990 is better. ?Non of the carbs you mention have accelerator pumps in them. A slight hesitation on take off isnt uncommon and is not a tuning issue.
It didn't come today if you don't have pictures ???? wanna see plzThanks for the information,appreciated.
So my obr 29.5 FM LB, came today?
So I guess I'll use 990 since I have it,for the moment anyway.
So I took off the carb on 23(25.4) ESP head and it's running a wt603. Any info on this carb?. I had put the 990 on but haven't tested. The 23 ran rich w/603 but needed tune. So I'll still have to get another carb unless someone says wt603 is good.
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