blaster carb question

[bllewis394]

so i have a blaster with a coffman's sizzler/61x and i cannot seem to get the low speed tuned for good throttle response.

in the water it idles fine and starts right up but the throttle response up through about 1/3 is really bogged down feeling, when it gets to the high speed jet however it takes right off.

ive tried richening the low speed but ive gone out from 1 1/4 turns to 2 1/2 with little difference. im a little nervous about leaning it out so i thought i would ask if this sounds like the low speed is too rich since there are a lot a people on here who know way more about tuning these things than me.

specs are:

hi-135
low-120
n/s-2.3
spring-65g

thanks for any help!

 

[Dustin Mustangs]

You are way low on pop-off and main jet. Try a 145 main and a 80g or even 95g spring.

 

[bllewis394]

You are way low on pop-off and main jet. Try a 145 main and a 80g or even 95g spring.

thanks, ill get that stuff ordered!

 

[Dustin Mustangs]

That may not be perfect, but it should get you close. If you run the stock f/a pull out all but one screen.