whats changed from the shark9 to the shark10

The Shark9 is a 3 port engine and it has a balanced crank in it. It also has the much lower cooling head on it so it may run a little warmer.

Shark10 no longer has a balanced crank and they have lowered the exhaust port on it to help with fuel mileage, it is also not a 3 port like the Shark9. It is more similar to the B10

A lot of people think the Cross10 is the same engine as the Shark9 and this is not true either. The Cross does not have the balanced crankshaft in it.

ok, I'm sure this question was ask before bu,t I don't feel like reading 115 pages yeah I know I'm lazy lol.

Most people now days run the os or ninja engines, I have been out for a few years and decide to get back into the hobby, I currently run a c6 with a jp1 and 7mm venturi and getting 7 maybe 7.5 mins per tank, I feel that my c6 can hang with the new os and ninja engines and at some parts of the tracks have more power but not as fuel friendly as the os any pointers on what to do? My c6 runs great it just don't have that fuel economy like the new ones, I was wondering if the new rb like the b10 has the same power of the c6 with better fuel economy? I currently run the c6 in a mugen mbx5r, I tried the new mbx6 but can't get used to it so I'm back to the 5 any help I'll appreciated.

Well there are two reasons your C6 is getting poor fuel mileage. The first is the JP1 pipe, while the pipe does make decent power it makes an RB an all out fuel hog. You would be doing yourself a huge favor by getting the 2045 pipe.

Next thing holding back your run time is the MBX5, that car is very heavy and has an inefficient drive train. With a 2045 you could probably get up to 8.5 minutes on the MBX5 but if you go back to the 6 you might even see those runtimes go to 9 or 10 depending on track and driver.

As far as getting a B10, that engine is a great engine but is not going to be a ton different than your C6. if the C6 is still in good condition you can save some money by sticking with it and getting a 2045 pipe, and both 192 and 198 headers.

One more thing that will help alot it to lighten your drive train is blow out all the grease in your berings and lube them (the diff. is out of this world!!!!!). Removing 1 oz. of rotating weight is the same as removing 4 oz. of chassis weight.

The 2045 makes a huge difference, plus JP pipes tend to make C6's run about 20 degrees hotter from all of our running experience.
Ive always liked the C6/2045/6.5mm venturi combo

Thanks chris I'll look into getting one soon I do have an os 2045 and I have a 192 header I think, is the os 2045 the same of the rb 2045?

Nick-Thanks for the info

on the buggy yes I noticed the weight issues when driven the two of them I just drive the 5 better then the 6, the 6 seems more unsettled to drive but that may have to do with the weight but thats issue to another thread.....

OS doesn't make a 2045. The OS 2060 is an efra 2042.

Sorry I have my numbers confused the numbers on the os pipe I have are 2050 that are made for the vspec engines I'll try that with the 192 and see how it runs in the mean time till I get the rb 2045

The stock OS 2050 pipe has a short manifold close to a 2.8" centerline. The RB 192 is much longer with a centerline close to 3.3". Don't think that mix and match job will yield good results.

Thanks for you knowledge I'm just trying to see if it gives me better fuel milage I got the rb 2045 coming but it may not be here on time for this weekend. Thanks for y'alls help

I have seen with my own eyes a B9(C6) run very well stock with an OS 2050 pipeset. So good i'm still not sure to believe the guy that it was a stock engine.

best fuel milage
 

which engine is going to get the best fuel mileage. (with good power)
I need to run 20 min. main with 1 stop
I run on midsize loamy track, descent traction (revalation raceway) s. cal, with many pro drivers
need bottom end power/ punch. but smooth and controllable.
i currently run a ceo modded c6 7mm venturi with 2045 pipe and 1351-192p header, alum clutch 1.0 spring rb #7 plug. All suggestions appreciated

To be exact, it's a 5+2 port with 3 exhaust.

What is with RB and using flat blade screws and how in the world do i get the four that hold down the head out?

Long skinny flathead driver, simillar to a tunning screw driver would be my guess.