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Old 03-25-2007, 09:31 AM   #1
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Default RB motor in an 8ight

need some help here guys....i have been reading all the "what .21 motor should i get" threads and saw some good advice but i want to refine what i have seen. i am very partial to the RB motors since i ran one in my Jammin X1 CRT last summer, so i need some input on what RB motor/pipe to try in my 8ight? i am currently looking at the S5, but there are so many other choices that RB has that may be better?

the track i race on (once the weather breaks) would be considered tight with a few technical sections, but in the near future it is going to be reworked to become about double the size with alot of elavation changes, so i would say medium and open.
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Old 03-25-2007, 10:00 AM   #2
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Well either the WS7III or the C6BB.

Either will be great in your 8ight.

I use a C6BB in my CRT with a RB2020 pipe and long manifold for more bottom end, it had plenty to begin with but I like alot of bottom end.
In my Buggy I used the WS7III because I felt it had better mid range.

Either way use the RB2045 pipe and in a buggy use the shorter manifold I think its 92mm.

You will be very satisfied.
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Old 03-25-2007, 10:04 AM   #3
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RB only makes 1 really good engine for that app. S5 . C6 WAY too much power!! 7port versions are dogs with out a lot of fussing.
Personally I would go with a new Novarossi 5 port Plus 21k or 367 plus 2.
Very smooth and powerful and last !! RB's will last too ,but the "S" series doesn't seem to hold up quite as good as the C6's and Novas.
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Old 03-25-2007, 01:02 PM   #4
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I'd probably get this one
http://www.rctech.net/forum/showthread.php?t=154302
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Old 03-25-2007, 03:09 PM   #5
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Wink

In the 8ight the S5 will be fine. Run an .063 or .053 pipe and you will have all you want. Keep in mind the Losi car is the lightest of all the buggies. They are also geared to come out of the corner real quick. Every friend I have has tried to run big motors in their 8ights and have all switched to smaller power plants.
The .063 pipe will be good for small tracks and the .053 for medium open tracks. Get your self a short header to complete your exhaust setup.
Good luck,
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Old 03-25-2007, 05:40 PM   #6
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ws7 II x3 with a jp 2 is a great combo for small or large tracks. Just my 2 cents
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Old 03-25-2007, 06:51 PM   #7
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thanks for the input guys!! what do you think about the Jammin JP3 pipe on the S5?
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Old 03-26-2007, 06:56 AM   #8
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Red face

jallshouse - it seems the JP-3 is truely a good all around pipe. The S5 is known to not have much in the way of snap out of the corner. This is fine considering how the 8ight picks up speed so quick. If you are going with an S5 then I would suggest an .063 for small track. The JP-3 will set you back $89 and the 063 clone by Dynamite will set you back $59. The JP-3 does come with a long header that will help the low end. It also gets good fuel mileage and is made to take the abuse.
Good stuff.
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Old 03-26-2007, 09:39 AM   #9
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I have to disagree about the pipe for the S5. I have an S5 & I have tried 086, 053, 063 pipes & others. I think the 2020 made that motor come alive.

I also have to disagree about the comments on the 7 ports. The regular S7 (not W) is no fuss to tune & makes great power, again I like the 2020 on this motor. I have 2 of these and have had the WS7II as well.

On the C6, the 2045 is the way to go. I agree this motor makes monster power but I also find it very drivable on shorter tracks.

I will not comment on the JP pipes because I have never used one.
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Old 03-26-2007, 10:05 AM   #10
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Quote:
Originally Posted by layedbackguy
ws7 II x3 with a jp 2 is a great combo for small or large tracks. Just my 2 cents
Really, you think the JP 2 is good for it? I have a regular WS7II with a JP1, still has "too much" top end for my track, but the bottom end is still lacking. Although I am sure it is also my tune to an extent. I have it in my 8ight with the 14 tooth CB...
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Old 03-26-2007, 02:17 PM   #11
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Quote:
Originally Posted by rezenclowd3
Really, you think the JP 2 is good for it? I have a regular WS7II with a JP1, still has "too much" top end for my track, but the bottom end is still lacking. Although I am sure it is also my tune to an extent. I have it in my 8ight with the 14 tooth CB...
I run that motor and pipe combo on a regular at our local track. It has nice bottom, and crazy top end. We dont have alot of big jobs, but it's pretty punchy in and out of corners. Have used the jp1 with it, and the results seem to be pretty close.
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Old 03-26-2007, 03:01 PM   #12
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http://www.rbproducts.com/mainEn.php...duit=E01005-S5 and call it a day. i couldnt be more happier with my c6 combo. locals told me not to use RB because they tried using mismatched pipes and manifolds. all i can say is i am a newb and only trouble my c6 gave me is when i didnt lean it out as as i should have. c6 isnt too UNcontrollable either just depends on if you like to pull the throttle or squeeze it. slowly squeezing it my c6 still pulls away pretty bad from my rossi 21 bf in a drag race
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