8BU-10 setup ..round 1

modsrx said:
need to remove some weight in primary never adjust the rpm with secondary
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Mr viper said my secondary was opening too fast with that aggressive of a helix and red spring was too weak for it. I have stock primary spring and stock weights with only a little weight added in the middle. Told me try red at 100, And green at 70. Record speeds. Will see what happens. Will be putting in stock 47 also with stock spring wrap. That should put me right at 8500 I would think with all stock setup with addition of a little mid weight...
 
I agree the green at 60. My sled with its current setup will gain 3 mph in 1000' going from 80 to 60. You could also put the red back in and go to a G-W-G primary in it. You will have the same launch but gain some topend rpm's with the G-W-G
 
Spinner18 said:
Mr viper said my secondary was opening too fast with that aggressive of a helix and red spring was too weak for it. I have stock primary spring and stock weights with only a little weight added in the middle. Told me try red at 100, And green at 70. Record speeds. Will see what happens. Will be putting in stock 47 also with stock spring wrap. That should put me right at 8500 I would think with all stock setup with addition of a little mid weight...
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yep sounds like your problem ...put a green spring in there ...red one will work better for top end if u do not punch the throttle wide open so the belt don't sunk into the secondary ... but will not work good for trail ride
 
modsrx said:
yep sounds like your problem ...put a green spring in there ...red one will work better for top end if u do not punch the throttle wide open so the belt don't sunk into the secondary ... but will not work good for trail ride
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Yes, probably right. Will try and see how they feel. Even at 70mph, in I punch it then, rpm will hit 8500, then I can feel it shift into an overdrive feeling and rpms fall to 8100 everytime.
 
If it were me...I would install a green spring wrapped to 70 with that helix then leave it alone and do all my tuning with the primary weight and springs...JM.02c

Bob
 
sideshowBob said:
If it were me...I would install a green spring wrapped to 70 with that helix then leave it alone and do all my tuning with the primary weight and springs...JM.02c

Bob
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same for me...unless u wanna do some long pull radar gun
 
Blue what do you want this setup for? trail riding or just for speed runs? There are by far better trail setups than this.
 
modsrx said:
its gonna be a great trail set up .........
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As Turk would put it you can't have great speed run setup and a great trail setup in the same setup. Either this setup doesn't perform as well as Tony says it does for top speed runs or it isn't going to be good trail setup. If it actually does both you better package it and sell it for $500 a pop
 
well to be honest i don't run 8bu-10 but the set up i got run almost everywhere ..so i'm sure u can make those 8bu to work very good
 
ok guys..I hear ya's.First I am gonna try red at 90 and see were rpm's sit and my speed. Then come back home and switch to Green at 70 and see what that does.. Then the one that seems to be the close one will be the one,and like Bob said..fine tune the primary to it then.Got a fews days left to the weekend.I just want to see what speed the SRX can do on top with these weights.We do have a radar gun and we do have a helmet cam for the weekend.I usually like to take the SRX on the River and pin it hard in the straight a ways.If it snows heavy,I will switch to my 600 to ride then.Weather has been ideal for testing today and the next few days look great to.I know 1 thing for sure.with these weights.does it ever pull midrange..man o man... crazy like!!!Love that feeling.
 
bluemonster1 said:
the primary lines I made have about 1/4" black marker left..so belt is climbing to the top,thinks the green was to much pressure at 80.I will try red spring at 90 first,I red spring seemed to be more suited I can see.There are different combo's to try and only so much time to ride..Tomorrow is another testing day I guess.
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asking if my clutches are shifting all the way.Yes primary marks show it and noticed tonight when switching springs in the 2ndary..belt mark line towards the bottom,but still had another 1" to 1.5" to drop..so it wasn't shifting out totally due to the green at 80 most probably.
 
wouldn't that be kinda to stiff a spring to use.....maybe not..guess more testing to do... #$%&* :rofl:

here it is then;;
either:

red at 80
green at 70
silver at 60
 
Bingo

SRX700guy said:
I agree the green at 60. My sled with its current setup will gain 3 mph in 1000' going from 80 to 60. You could also put the red back in and go to a G-W-G primary in it. You will have the same launch but gain some topend rpm's with the G-W-G
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I've been watching this thread because I used to be into this stuff and I've played with these weight quite a bit. This guy above is in the hunt. Some hints:

1. Your primary spring is too weak. Try a G/W/G or for more engagement a Hauck orange
2. Green secondary spring and look for a helix in the 51/45 area. Your finish angle is too shallow for these weights at 40 degrees.
3. Tune RPM's with the primary after you get these components in there.

By the way....if you are looking for a set up that is going to be light years ahead of 8DN-20's you might as well give up now. You might improve some aspects but you are going to suffer elsewhere. It's fine if you are having fun tuning but now you are spritting hairs.

Madmatt
 
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