R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 08-01-2010, 03:09 AM   #1
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default pipe too long

I am facing a problem with my sirio pipe being too long in my serpent (it touches the steering rod end). i have
shaved down the front of the pipe a little, but it needs a bit more. So, i have
the problem that if i shave it more, the grub screw will become too small
maybe one-thread will be left. I was thinking dont mounting this grub screw
and mount a silicone tube under the pipe at the exhaust spring and secure
the pipe with a collar. Any othe suggestions would be usefull..
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Old 08-01-2010, 05:44 AM   #2
Tech Elite
 
Join Date: Sep 2005
Location: Corona Ca.
Posts: 2,834
Trader Rating: 18 (100%+)
Default pipe too long

Quote:
Originally Posted by gfilos View Post
I am facing a problem with my sirio pipe being too long in my serpent (it touches the steering rod end). i have
shaved down the front of the pipe a little, but it needs a bit more. So, i have
the problem that if i shave it more, the grub screw will become too small
maybe one-thread will be left. I was thinking dont mounting this grub screw
and mount a silicone tube under the pipe at the exhaust spring and secure
the pipe with a collar. Any othe suggestions would be usefull..

Drill a small hole as close to the pipe as possible.<remove grub screw first>
Use your pipe hanger, and rebend it so it will go from the bottom of the pipe up.
Then use a small collet on top of the pipe hanger to prevent the pipe from raising up on the hanger.
If you are unable to bend the hanger this way, you can always install the hanger pointing down as long as you use a collet on the hanger to hold the pipe in place.
Once you do this, you can cut off the excess off the front of the pipe that is hitting your steering assembly.
You can also make a new pipe hanger with a right angle bend on it if you are unable to bend yours as needed
This happens a lot with the Serio engine/pipe systems
__________________
[COLOR="Red"][FONT="Comic Sans MS"][/FONT][/COLOR]BRC358http://www.kamikazercracing.com
nearest barstool
brc358 is offline   Reply With Quote
Old 08-01-2010, 06:54 AM   #3
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default

Quote:
Originally Posted by brc358 View Post
Drill a small hole as close to the pipe as possible.<remove grub screw first>
Use your pipe hanger, and rebend it so it will go from the bottom of the pipe up.
Then use a small collet on top of the pipe hanger to prevent the pipe from raising up on the hanger.
If you are unable to bend the hanger this way, you can always install the hanger pointing down as long as you use a collet on the hanger to hold the pipe in place.
Once you do this, you can cut off the excess off the front of the pipe that is hitting your steering assembly.
You can also make a new pipe hanger with a right angle bend on it if you are unable to bend yours as needed
This happens a lot with the Serio engine/pipe systems
i am not sure i understood. Why should i drill a small hole? The spring exhaust holder is mounted into the pipe hole from bottom to top.
Do you mean to drill a new hole closer to the pipe so i can shave more material? I think that if i
shave the front of the pipe and let 1mm off the hole it will give the clearance i need. However, then i wont be able
to mount the grub screw so what i want to ask is if a collet is a safe way to prevent pipe going up. Btw i am using a bend xray exhaust spring which gives me
extra wire to mount a collet on the top of the pipe.

Another way is to get rid of this sirio pipe!
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Old 08-01-2010, 07:22 AM   #4
Tech Champion
 
nitrodude's Avatar
 
Join Date: Aug 2002
Location: Oxnard, CA
Posts: 5,842
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by gfilos View Post
i am not sure i understood. Why should i drill a small hole? The spring exhaust holder is mounted into the pipe hole from bottom to top.
Do you mean to drill a new hole closer to the pipe so i can shave more material? I think that if i
shave the front of the pipe and let 1mm off the hole it will give the clearance i need. However, then i wont be able
to mount the grub screw so what i want to ask is if a collet is a safe way to prevent pipe going up. Btw i am using a bend xray exhaust spring which gives me
extra wire to mount a collet on the top of the pipe.

Another way is to get rid of this sirio pipe!
You understood most of it, except the part about the collet. If you use a collet, you dont need the grub screw. You use the collet to keep the pipe from falling off of the pipe.

This is what the means by collet.

http://www3.towerhobbies.com/cgi-bin...?&I=LXM748&P=7

So, you drill the extra hole right next to the pipe, put the wire hanger into the new hole, put the collet/stopper on the wire hanger, set it right up against the pipe, and tighten the grub screw on the stopper.

Then you just grind off the extra material from the pipe and the pipe doesnt hit the turnbuckle anymore.
__________________
Steven Muller
AKA El Pibe RUFAST? HAHA!!!
Ronin Speed Parts
nitrodude is offline   Reply With Quote
Old 08-01-2010, 08:28 AM   #5
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default

Quote:
Originally Posted by nitrodude View Post
You understood most of it, except the part about the collet. If you use a collet, you dont need the grub screw. You use the collet to keep the pipe from falling off of the pipe.

This is what the means by collet.

http://www3.towerhobbies.com/cgi-bin...?&I=LXM748&P=7

So, you drill the extra hole right next to the pipe, put the wire hanger into the new hole, put the collet/stopper on the wire hanger, set it right up against the pipe, and tighten the grub screw on the stopper.

Then you just grind off the extra material from the pipe and the pipe doesnt hit the turnbuckle anymore.
Yes, this is what i was thinking but why to drill a new hole? there is a hole
designed for the wire hanger already there. I dont need opening a new. My
pipe will be secured by a collet at the top and by fuel tubing down to the hanger
so as to secure the pipe from going any under. And shave the front of the pipe until
going at about 1mm distance from the hanger hole.
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Old 08-01-2010, 08:57 AM   #6
Tech Elite
 
Join Date: Sep 2005
Location: Corona Ca.
Posts: 2,834
Trader Rating: 18 (100%+)
Default pipe too long

Quote:
Originally Posted by gfilos View Post
Yes, this is what i was thinking but why to drill a new hole? there is a hole
designed for the wire hanger already there. I dont need opening a new. My
pipe will be secured by a collet at the top and by fuel tubing down to the hanger
so as to secure the pipe from going any under. And shave the front of the pipe until
going at about 1mm distance from the hanger hole.
Thats great if the orginal hole will work. You drill a new hole only if you need to gain as much room as possible.
But I think you have the idea now. If you use a collet on the pipe hanger instead of the grub screw, you can grind off the excess off the front of the pipe that is causing the problem
__________________
[COLOR="Red"][FONT="Comic Sans MS"][/FONT][/COLOR]BRC358http://www.kamikazercracing.com
nearest barstool
brc358 is offline   Reply With Quote
Old 08-01-2010, 11:49 AM   #7
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default

thanks guys. Yes i undestood the meaning of opening a new hole, however
the original hanger hole is made as back as possible at the sirio pipe. So, i ll have to work with this hole and shave up to the limit at the front of the pipe.
this will create some space for the steering rods, not much though, maybe 2 mm but this is the best i can do.
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Old 08-01-2010, 02:09 PM   #8
avs
Tech Master
 
avs's Avatar
 
Join Date: Jul 2006
Posts: 1,175
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by gfilos View Post
thanks guys. Yes i undestood the meaning of opening a new hole, however
the original hanger hole is made as back as possible at the sirio pipe. So, i ll have to work with this hole and shave up to the limit at the front of the pipe.
this will create some space for the steering rods, not much though, maybe 2 mm but this is the best i can do.
i take it that no shorter header pipes are available?
__________________
Tony Shimko
avs is offline   Reply With Quote
Old 08-01-2010, 02:18 PM   #9
Tech Regular
 
streetfreek's Avatar
 
Join Date: Jul 2009
Location: NORCAL
Posts: 450
Trader Rating: 7 (100%+)
Default

can't you just shorten the header...?...I had a similar problem on my NTC3 with an RB pipe.
streetfreek is offline   Reply With Quote
Old 08-01-2010, 02:27 PM   #10
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default

Quote:
Originally Posted by streetfreek View Post
can't you just shorten the header...?...I had a similar problem on my NTC3 with an RB pipe.
yes you can (by using a shorter manifold) but then you will change the powerband of the motor.
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Old 08-01-2010, 04:28 PM   #11
Tech Elite
 
Join Date: Sep 2005
Location: Corona Ca.
Posts: 2,834
Trader Rating: 18 (100%+)
Default pipe too long

Quote:
Originally Posted by gfilos View Post
thanks guys. Yes i undestood the meaning of opening a new hole, however
the original hanger hole is made as back as possible at the sirio pipe. So, i ll have to work with this hole and shave up to the limit at the front of the pipe.
this will create some space for the steering rods, not much though, maybe 2 mm but this is the best i can do.
Is this by chance on a Kyosho RRR?
They usually have the most problems,as there seems to be enough room on the Mugens.
I ran the Serio pipe and header on one of my RRRs, and ran into the same problem, and after talking to a few drivers, they had the same clearence problems, solving just they we we discussed it.
I then installed the same pipe/engine in one of my Mugens and even though it was a tight fit, it did work ok.
__________________
[COLOR="Red"][FONT="Comic Sans MS"][/FONT][/COLOR]BRC358http://www.kamikazercracing.com
nearest barstool
brc358 is offline   Reply With Quote
Old 08-01-2010, 11:10 PM   #12
Tech Master
 
Geezatec's Avatar
 
Join Date: Oct 2007
Posts: 1,460
Default

Fileing, Shorten header, and other recommendations. I think you Radio EPA(End point adjustment) could settle your problem w/o doing any advise of modifying the exhaust manifold.

Just my opinion. Good luck!!!
Geezatec is offline   Reply With Quote
Old 08-02-2010, 02:32 AM   #13
Tech Adept
 
gfilos's Avatar
 
Join Date: Aug 2008
Location: Greece
Posts: 230
Default

Quote:
Originally Posted by brc358 View Post
Is this by chance on a Kyosho RRR?
They usually have the most problems,as there seems to be enough room on the Mugens.
I ran the Serio pipe and header on one of my RRRs, and ran into the same problem, and after talking to a few drivers, they had the same clearence problems, solving just they we we discussed it.
I then installed the same pipe/engine in one of my Mugens and even though it was a tight fit, it did work ok.

no, its on a serpent 720. Anyway, i did shave it and has about 2-2.5 mm clearance without applying any force to the pipe.
I think it will be fine. i just have to find some good quality collets to do the job.

thank you all guys,
__________________
Serpent 720 09 mega zx 12 dsII+, Serpent 733 nova 353 tuned/sirio XXXV
Futaba, Graupner, Hudy, RB fuel
gfilos is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 11:51 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net