Monty we talked in private abt some motors. What pipe would be better on the newer 21-4btts?? 9901 or 2084???

either is a great choice for buggy

i would personally choose the 9901ss as i prefer a little smoother feel , the 2084ss has a little extra punch and a smidge more rev out but both are great
plus 21-4btt
41021

9901ss
2084ss

Houston, I have a 21-5 non turbo what is the best pipe for it I have 9901,
41021, 41020,dynamite 053,086, Also what would be the best milage thanks.Tim

is it in pretty decent shape ?

dynamite 086hs works great on that engine as well does the 9901ss/41021


but it depends on what you are looking for as far as feel from the engine , if you are running it in truggy or buggy , if you are looking for the most runtime or the most power , etc. etc.

Hey Monty, good to meet you this weekend. Good to put a face to the name instead of words on the forum.

I've got a question for you guys. My buddy got an ofna mutilator truggy,and it comes with the force 32 engine in it. It says to run 20% in it, but we can't really get 20% anywhere near where we live. We order all of our fuel in bulk and it's byron's 30%. Will he be alright to run 30% in it, or would he have to add some shims to it? If it does need shimed, what size should we use in it.

It will be just fine, I am sure of it

Nice to meet you as well Hans

Well, it is junk. 4.77 to 4.86 measurements. I guess i really got screwed on this deal. I may just put it back together, put some 50% nitro in it and see how long it lives.

Guess i won't bother sending it to you now.

Scott

so you bought it from groundhawg1979 right?

pay with paypal?

get your money back !!!!


this happens way tooo often and is absolute BS!!!!!!!

Ran the FMS with a Dyn 007 pipe at the AKA Mid America championship this weekend. That dude was bad fast. Was running top 3 in truggy when the engine stalled on me. Back in the pits realized the idle was too low. Dang it. But back on track fast and still managed 7th place I think. I can't wait till they post results so I can look at those lap times.

Wow, FMS stalled out? That's crazy

LOL. I know. It was my bad cause I couldn't hear it during warm up. Pit man turned it up a bit and it was golden.

hopefully you got it all dialed in for next time bro

I tried it online, PayPal denied it, would not even start one. I may call them up and see what i can do.

Lesson learned on this one.

Scott