[SPAM] Re: NMP Header

[Troy A. Newman]

The front support is too tight or the pipe and header combo is hitting the 
model. I saw this happen with another model where the header was actually 
hitting the side of the model when it was moving on the motor mount. The 
pipe tunnel was exposed but was just narrow enough to fit the pipe...it 
didn't allow any side to side motion.  Also look at the angle the header is 
taking as it leaves the head of the motor...If it is bending up at a sharp 
rise and then levels out in the pipe tunnel this is putting stress on the 
pipe as well. This is a problem on the Focus I have seen the answer is to 
move the motor as far forward as possible and then cut the firewall down 
where the pipe tunnel starts. This gives the pipe a gradual rise rather than 
trying to make it all at one shot and then bend it back toward the model to 
fit a pipe level in a pipe tunnel or recess.

The wire tie wrap on the NMP pipe mount thing for the front support should 
be loose allowing maybe a 1/4 of travel in all directions. This will 
restrain the front of the pipe but not secure it driving the forces up to 
the header. They also make a small header mount bracket that attaches in the 
middle of the S bend and then mounts to the rear mounting lug on the back of 
the carb that is used on the YS mount. So a motor that is 140FZ or earlier 
can not use this...but 140L, 120FZ and all the current 140-160 stuff it 
works on just fine.

Troy
----- Original Message ----- 
From: "Todd Schmidt" <tschmidt at classicnet.net>
To: <discussion at nsrca.org>
Sent: Wednesday, July 27, 2005 8:13 PM
Subject: NMP Header


>
>
> Anyone having trouble with the NMP header breaking at the first bend.  A
> fairly new one (maybe 30 flights) broke this evening. YS140L on a Hyde
> mount, pipe is mounted with the NMP system.
>
> Any tricks I'm missing to keep this from happening?
>
> Todd Schmidt
>
>
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