O.S. .21 VG (P) - Good engine for a beginner??
09-17-2007, 07:46 AM
#136
I don't think these motors last long. I got one used, installed new Boca bearings, new piston/sleeve, rod, pins & clips. Broke it in on rich setting (fuel rich throttle limited) used only half throttle for 5 tanks (230 average temps), now its been run in the car and tuned for good response while still rich. These motor do not like hot weather & humidity. SoFla weather is killing this thing. Very hard to keep temps under 250 without too rich boggy throttle. Running O'Donnells fuel 20%. Saw upwards of 308 today before shutting it down. Motor seem to lean out when getting hot. Also is mushy in the bottorm end torque area. Will be installing a 13 tooth bell and low end pipe. Mid pipe is OK, but everybody else on the track is killing this motor at local track. I also was told by local guys at track these motor don't last long. Next motor will be back to a Picco/Nova motor. Plus I see way too many used OS motors needing rebuilds or bearings in FS forums.
Low end is too lean. That's what I experienced this weekend with mine. Started richening up the low end and the torque increased and the temp stabilized.
10-04-2007, 02:46 AM
#138
Wow, I bet itll be a apple to orange's kind of change. I know the OS is smoother trough out the rev's. No one has a better carb than OS. As for power wise i don't really know. Someone out there chime in?
10-05-2007, 01:11 AM
#140
I'vee only got about 3 gallon's on my 2 VG's right now. 1 is modded and the other is stock. 8 to 9 gallons's will be rare for my VG's cause im pretty hard on them. So the 8 port might be your best bet.
10-05-2007, 08:30 AM
#142
just my thoughts on it .i have a vg and is a good motor but my novarossi 3 port is a lot better and just as easy to tune and 3 times the power for only 40 bucks more. and check your compression it sounds like you lost it from running to lean.
10-06-2007, 09:15 PM
#143
If cost wasnt an issue i would go with the Novarossi also.
10-06-2007, 09:40 PM
#144
O.S AND OPS
i run a o.s in my 1/8 scale v-spec never had a problem with it i also run a OPS in my Losi 1/10 The OPS is a very strong motor .12 vey fast temp on the .21 is 222 Deg'S and the OPS is 196 DEG'S WELL KEEP RACING TALK TO EVERY ONE LATER.......
10-07-2007, 08:29 AM
#145
hmmm yeah the Novarossi .21 3-Port is only $175 at amainhobbies. heres a link
http://www.amainhobbies.com/product_...oducts_id/9124
http://www.amainhobbies.com/product_...oducts_id/9124
10-07-2007, 06:45 PM
#146
I wouldn't compare or don't even compare the O.S. VG to a Novarossi. First off, the VG is a ABN engine while the Novarossi is a ABC. Hands down, the Novarossi 3 port will outrun and outlast the O.S. VG. Everyone at my local track will tell you the VG doesn't last very long.
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