header help

[j0olz]

i was wondering if having a longer length between the header and pipe will alter performance. This paradox came to me as i was installing a new pipe on my xxx-nt rtr. i noticed that there was a large space between the header and pipe. Good or Bad?

 

[x_789]

it will give more highend and less torge more than likly but in trucks that light it probably wont matter.
You figure the longer and slower the pipe expands the more middle and top end you get. So its like elongating the pipe a bit. x

 

[Çh®i§tiªñ]

Well on the XXX-NT I have noticed that it is a bit longer than most. Will it impact performance? I would venture to say yes. The more airspace in the exhaust system, or less, the more or less backpressure you will have. Of coarse, this is all guessing on my part. Just would seem logical to me.

Anyone?

 

[FastEddy]

Here is some info on different pipes. You my be able to equate some of the info here to your header question.

Here

 

[j0olz]

Thanks everyone, got the problem fixed. i actually placed the car at the beginning of a 5 yard stretch, i then altered the length between the header and pipe until it could get acroos those 5 yards from a standstill the fastest

 

[FastEddy]

Originally posted by j0olz
Thanks everyone, got the problem fixed.

Share your findings with us.

 

[backspur]

Pipe

Generally, the longer the gap between the pipe and header the greater the low end. Of course with all the different pipe, header, engine combos this only works up to a point. The acceleration test that you used is the best way to get good results.

 

[j0olz]

i now have my header approximately 1 and a half inches away from the pipe. This is w/ the adam drake edition header and the stock xxx-nt pipe and a rb .12 engine. this has proven to be a very effective combo, seeing that i whooped some @$$ at my last club race

 

[Hunter]

You must be racing on a short tight track am I right?

 

[j0olz]

yea, only one straight away, very short, maybe 7 yards.

 

[Hunter]

Make the gap longer and you will get better low end, also pick a pipe with a steep divergent cone in its design this will give you the best off the line speed.