30.5 stuffed stroker

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kevinmt

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hi all, i finally finished mt break in since doing stuffed stroker crank,esp modified championship ported head,990 carb.,8k hpi clutch,ada billet intake,and all i got to say is holy s&%t crazy fast.one small issue is kind of a pain to start(5 to 10 pulls)im assuming cause the 990 carb. has no choke?tank is vented.any one experianced this or have any thoughts to help would be greatly appreciated,thanks
 
my xsc takes like 5 or 6 ever since I put the 990 on some one told me if it was tuned right it should start in like 2 or 3 but I dnt know how much more perfect I can toon it the plug is a paper brown color
 
I have spent quite a bit of time modding 990-813- ect. Whaiti do to these guys is mod the butterfly valve. I have went tru dozens of new butterfly valves, Trial and error. I have hit the sweet spot on the 813. This is one good carb with the accelator pump!! Thing is with the 813, ya just pump the throttle 2-3 times, It lights right up. These larger engines really rip with this carb- off the bottom the modded 813 launches quite a bit harder than the 990 because of the pump and butterfly mod- This is in 80-85 degree weather. When it gets colder I will put a slightly lighter rate pressure spring in. This spring is somewhat like changing the power valve on a Barry Grant, or Holly full scale carb- The timeing of fuel enrichment. Man do i love working on these cars-engines!!!!! Ya know? the way we all bust our butts at work, we deserve to have this hobby, no matter if our work is mental or blue collar- we need quality time. - never say this to the woman, -quality time!!!lol!
 
I run the 813 on three of mine and just pump the throttle 3-4 times and they start 2nd or 3rd pull usually. Oh don't get the quality time thing started that does stir up poop lol.
 
lol you arent kidding about quality time.thanks for the info. do you think the 813 is better than the 990? :D
 
kevinmt said:
hi all, i finally finished mt break in since doing stuffed stroker crank,esp modified championship ported head,990 carb.,8k hpi clutch,ada billet intake,and all i got to say is holy s&%t crazy fast.one small issue is kind of a pain to start(5 to 10 pulls)im assuming cause the 990 carb. has no choke?tank is vented.any one experianced this or have any thoughts to help would be greatly appreciated,thanks
Click to expand...
Might need to richen up the LSN a bit.
 
rchobby89 said:
my xsc takes like 5 or 6 ever since I put the 990 on some one told me if it was tuned right it should start in like 2 or 3 but I dnt know how much more perfect I can toon it the plug is a paper brown color
Click to expand...
Remember your plug color is showing WOT condition, not the idle.
 
kevinmt said:
have you seen the choke plate they sell?wondering about thoughts on that
Click to expand...
You should not run those off road. They leak air/dirt through the lever.
 
I bet if you richen it up a bit and increase the idle stop screw also it will start easier.
 
kevinmt said:
hi all, i finally finished mt break in since doing stuffed stroker crank,esp modified championship ported head,990 carb.,8k hpi clutch,ada billet intake,and all i got to say is holy s&%t crazy fast.one small issue is kind of a pain to start(5 to 10 pulls)im assuming cause the 990 carb. has no choke?tank is vented.any one experianced this or have any thoughts to help would be greatly appreciated,thanks
Click to expand...
Richen the LSN half a turn, then pull until it tries to start. Then lean the LSN half a turn and give it another pull. Should fire right up.
 
deluge when you say that they are trash and let dirt in which carb are you talking about. i'm mixed up but that ain't nothing new!
 
It has an opening after the filter where dirty air can enter and get sucked into the engine. The product was not designed for off road RCs. Goped guys use them but strictly on the street.
 
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