352LikesNOVAROSSI Engine thread....
07-24-2013 | 05:18 PM
#5807
I averaged 9:10 to 9:25 last month at the Tilityard for the Roar Region 2 race series race. My Roma was at maybe 3 quarts of run time when did a few timed runs. This was with the 2084/41021 combo on 6.0 restrictor in 811T with OEM clutch (4 alum shoes-med springs) on 30%. Needles were not at a full race tune...a touch rich.
Personally I love the sound of the 9886 no matter what engine I've used it on. Unfortunately I get lower mileage so I rarely use it anymore. But wow...engines sure sing on top, nothing like the wailof the 9886. FWIW I have not tried the 9886 on the Roma, only the 9901 and 2084. Compared to the 9901, my 2084 gave better fuel mileage and feels smoother across the power band. I would like to try the 2096 on the Roma just have not gotten a chance to do so.
Personally I love the sound of the 9886 no matter what engine I've used it on. Unfortunately I get lower mileage so I rarely use it anymore. But wow...engines sure sing on top, nothing like the wailof the 9886. FWIW I have not tried the 9886 on the Roma, only the 9901 and 2084. Compared to the 9901, my 2084 gave better fuel mileage and feels smoother across the power band. I would like to try the 2096 on the Roma just have not gotten a chance to do so.
07-24-2013 | 05:19 PM
#5808
07-24-2013 | 06:08 PM
#5810
07-25-2013 | 08:42 AM
#5811
Tech Regular
Joined: May 2011
Posts: 423
If you figure out how to get more than 8 minutes out of the Roma let me know. I'm running the 9886 pipe with 41001 header and get 8 minutes .It runs awesome and if I can pit at 7.30 I'm happy. I geared it up to a 14 tooth clutch to help tame it down some but this thing screams on the straight.
07-25-2013 | 10:13 AM
#5812
41021/51016 combo will give you the best mileage from what we see traveling around. For a carb restrictor, you should try 6.0/6.5/7.0. We recommend starting with 6.5. LSN is about flush +/- 1/4 turn. HSN is about 1/2 to 1 turn in from flush on a fully broken in engine. Newer engines need the HSN more open (~flush) and that's why it takes a little while (1-2 gal) for the mileage to come around. We normally see ROMAs doing 10+ minutes in Truggies without stressing the engine. To get 12-15 minutes you have to run the engine very lean and you better be careful and know what you are doing.
Great info and your always very helpful!!
07-26-2013 | 12:31 PM
#5814
Hi
don't forget to make the bottom end flush before starting it for the first time and raise the idle just a little bit to keep it running during the initial break in.
07-26-2013 | 09:05 PM
#5817
Shoot for about 210 to 220* F I run the first 2 tanks separate one at a time, letting the engine cool with piston a BDC (always) After that taking easy runs, back to back tanks with light load, no more then 1/4 throttle but keeping the temp in that target range. Each pair of tanks gets a little more throttle and a little leanerfor about 1500CC than I put it on the track and take it easy for a few more tanks. By then it will be ready for a fat race tune. At about 2 gallons it will be fully broke in and ready to scream at 260 to 280*
07-29-2013 | 01:23 PM
#5819
07-29-2013 | 01:34 PM
#5820
