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Old 03-18-2003, 12:06 AM   #1
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Default All About Pipies & Manifolds

Hi all,

i wanted to have a thread like this so that we can discuss about which pipes and manifolds have a better combination or which pipe is the loudest or....etc.

I'm personally looking at these few pipes and have no idea which to get:

1. Zac project tuned pipe
2. Shark Pipe (outlaw w/6mm stinger)
3. Five Star

Any comments on the above pipes? lets get this thread going...
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Old 03-18-2003, 02:45 AM   #2
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Have heard very good things about the Zac and the Shark pipes. Sorry, can give you more info, I run with 5.2mm ID stingers and pipes change a lot with a larger stinger.
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Old 03-18-2003, 03:09 AM   #3
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Quote:
stingers and pipes change a lot with a larger stinger
In what sense? Larger stingers less torque or...?
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Old 03-18-2003, 03:29 AM   #4
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Quote:
Originally posted by Gravedigger
In what sense? Larger stingers less torque or...?
Generally larger stingers means higher speed at the expense of low-end, but many parameters affect to this (lenght, diameter and layout of the pipe and manifold), but as a general rule:

- The longer the pipe and manifold (measured from the first chamber to the end of manifold), the better low-end.
- The larger ID of the stinger, the better high-end at expense of low-end.

Depending of the divergent and convergent cones on the pipe, this affects to the performance of the pipe. Some time ago, Motorman posted a list of pipes depending of their features. Will try to find and post them as a reference.
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Old 03-18-2003, 03:35 AM   #5
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Default Pipe list from Motorman....

Here's the list of pipes that Motorman posted some time ago.

Quote:
Posted by Motorman on 01-01-2003 04:53 PM:
a little 2 cents worth on pipes. I will give you a list of pipes ranging from torque biased to rpm biased in an approximated order.

Torque at the top and RPM at the bottom
RC 10 GT
Paris turbo ring
Fantom steel
NTC3 rear and side exhaust standard pipes

all others this style and shape (sharp cone on each end long flat band center, single chamber. (above)
Nova mega TPO5
Novarossi 51604
Ofna one piece

Agressive divergent cones low mid biased (above)
Nova Mega TP04
Novarossi 51603
RB X12
RD logic one piece roar legal

moderate divergent cone mid biased
This is the mid list and these all act similar Good all around pipes neither bottom or top end biased (above)

RD logic outlaw
RB X15 outlaw
RB X12 outlaw

RPM top end biased not roar legal due to stinger diameter (above)
Picco 12 pipes
Novarossi 51601
Rex 52625

Mid top end biased roar legal moderate divergent cone agressive convergent cone. hard to find now due to the fact that short rod rever motors are the norm stock. These were the hot ticket on the MT 12.


Now all that said, how to pick a pipe. If the engine is a short rod rever you need a torquier pipe to enhance the bottom end as engine will be biased and take over on the top.

If the engine is a long rod engine you need a rev pipe to help the engine unload on the top.

Another note the stinger diameter has a dramatic effect on the top and bottom end.

Bigger = top end at the sacrifice of low end torque.
Smaller= low end at the sacrifice of high end revs.

pipe length must be considered the same way.

Shorter=top end at the sacrifice of low end torque.
Longer=low end at the sacrifice of high end revs.

Engine expectations
due to rod length. Short rod engines at the top and long rod engines at the bottom.

Very short
HPI 15 FE
Rossi Pixi

Short
RB X12 and all the X12 derivitaves
All Novarossi 12 engines except the MT
All Nova mega 12 engines

Mid length
Picco 12 and 15
Collari 12 all

Long
STS MT
Mugen MT

With all this you should be able to pick a suitable pipe for your car or truck based on the engine it has in it and the track you will run on.

Dennis Richey
AKA motorman
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