Originally Posted by Chad Phillips (Post 9922020)

I use the BTTS which is the same engine other than yours has a steel front bearing and mine is ceramic. I use the 6mm venturi with 41021 manifold and 9901 pipe. I use odonnell spend blend fuel and with this set up i can get over 11 minutes of run time. If I use the 2084 pipe i can go 13 minutes..

Originally Posted by mcion (Post 9924313)

I honestly would change the 9853 to 9901. The 9853 bottom end is just to insane where as the 9901 maintains good bottom end, but more controllable power.

Originally Posted by merdith6 (Post 9924486)

i tried the 9901 on the plus-4 and it was a bit too mild...Although it was in a test Durango, not the perfect test..

I might tryit on the p5...in the Mugen, but I like the way the p5 drives with the 9853, and the plus-4 really leans more toward p5 performance with the 9853....but I do have a 9901. I may just try it a little more....Maybe with the bent header it will pep it up.

Originally Posted by ABN Hoosier (Post 9923785)

Ok, I watched this video of Adam Drake talking about two engines. This is what was said in the video:

http://www.youtube.com/watch?v=qoWhB...layer_embedded

Buggy:
BTT engine
6mm restrictor
steel flywheel
4 shoe clutch (2 composite & 2 aluminum)
springs (composite shoe springs BLACK .036 25°)(aluminum shoe springs GREEN .036 30°)
9901 pipe
41021 header

Truggy
BONITO engine
7mm restrictor
aluminum flywheel
4 shoe clutch (2 composite & 2 aluminum)
springs (composite shoe springs GREEN .036 30°)(aluminum shoe springs GOLD .040 25°)
9901 pipe
41021 header

My questions are:
Lighter flywheel has what effect on motor?
Heavier flywheel has what effect on motor?
Lighter spring on composite shoe engages first, what advantage does this have?
Heavier spring on aluminum shoe engages later, what advantage does this have?

I run a RC8.2 with the same setup except a 6.5mm restrictor and a RC8 clutch with all aluminum shoes and 1.0x3 springs and my RC8T same except a 7.5mm restrictor 9853 pipe and a 41020 header and a RC8 clutch with all aluminum shoes and 1.0x3 springs...........

Originally Posted by Guillermito (Post 9925466)

A small correction! Drake says uses 4BTT "S"

Best Regards.

Originally Posted by Guillermito (Post 9925466)

A small correction! Drake says uses 4BTT "S"

Best Regards.

Originally Posted by kgombe (Post 9925685)

which the only difference is a front ceramic

Originally Posted by mcion (Post 9924828)

I tested them back to back at mikes, last weekend and was getting a lot more wheelspin with the 9853, which was causing me to lose time. Thru the 9901 on, and there was more usable traction so times got better. Track was dusty though.

Originally Posted by aussies1129 (Post 9924354)

did you richen your needles much going from a 6.5 to a 6mm venturi?
cheers

Originally Posted by ben73 (Post 9926816)

you need to lean the needles as you have less air to the carb when you go from 6.5mm to 6mm

Originally Posted by aussies1129 (Post 9926883)

yes thats right I got it the wrong way around, last week I forgot to put a carb insert in and it was rich as:lol:

Originally Posted by ABN Hoosier (Post 9929149)

BTT.......ok, 6mm venturi.....too hard to tune compared to 6.5mm...geeze, went back to 6.5. :cry:

Originally Posted by houston (Post 9929280)

Thars what I was getting at earlier ;)