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Subject: "Underdrive pulley messes up engine" Previous topic | Next topic
vaughnAug-25-03 06:37 PM
Member since Aug 10th 2003
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#57855, "Underdrive pulley messes up engine"


          

I was wanting to buy an af/x underdrive pulley but heard that it messes up the roation of the crankshaft and will give me problems later. If anyone has any comments please say

  
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Replies to this topic
RE: Underdrive pulley messes up engine, jerseystyle1, Aug-25-03 06:50 PM, #1
RE: Underdrive pulley messes up engine, TeamDR1665, Aug-25-03 07:29 PM, #2
      RE: Underdrive pulley messes up engine, MotoFool, Aug-26-03 01:00 AM, #3
           RE: Underdrive pulley messes up engine, ModeratorVX100, Aug-26-03 05:13 AM, #4
                RE: Underdrive pulley messes up engine, TeamMichael_97RS, Aug-26-03 11:27 AM, #5
                     RE: Underdrive pulley messes up engine, ThE oRACLe, Aug-27-03 06:29 AM, #6

jerseystyle1Aug-25-03 06:50 PM
Member since May 20th 2003
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#57857, "RE: Underdrive pulley messes up engine"
In response to Reply # 0

          

Do a search, this was discussed before and the same conclusion comes up.......That it is a bunch of BS. I am by no means an expert on the internal combustion engine, but I have a UDP along with the majority of peeps on here and I don't think anyone (since I have been here) has experienced any problems caused by a UDP.

Allan
2008 Magnetic Black 350z NISMO /1976 Austin Mini 1098 Special (export)

Member# 1980

  
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TeamDR1665Aug-25-03 07:29 PM
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#57861, "RE: Underdrive pulley messes up engine"
In response to Reply # 1

          

AFX UDP is one of the BPUs most here would consider MANDATORY. Whoever told you it's a bad idea is no one you want to pay to work on your car. Buy it. Rent the tool and install it yourself in about an hour. You WON'T regret it.

Welcome to the family. Stick around and learn many new things grasshopper. emoji

  
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MotoFoolAug-26-03 01:00 AM
Member since Sep 08th 2002
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#57869, "RE: Underdrive pulley messes up engine"
In response to Reply # 2

          

on alot of engines UDP can harm the motor the 420a it doesn't...

Bill

You can have it cheap, fast or good. Pick any two.

If you want it cheap and fast, it's not going to be good.
If you want it cheap and good, it's not going to be fast.
If you want it good and fast, it's not going to be cheap.

  
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ModeratorVX100Aug-26-03 05:13 AM
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#57874, "RE: Underdrive pulley messes up engine"
In response to Reply # 3



          

>on alot of engines UDP can harm the motor the 420a it
>doesn't...

Very true. It can be a bad addition to some engines. The 420A loves it emoji trust me, you'll like the power increase

"Tutto fa brodo."

Todd Scungio
98 RS
15.173 @ 90.70 MPH

And also a 2011 Ralliart

  
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TeamMichael_97RSAug-26-03 11:27 AM
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#57909, "RE: Underdrive pulley messes up engine"
In response to Reply # 4

          

Yup, 420A does not have a balancer pulley, just a damper. There's no damage and I say less strain on the engine due to the lower rotational mass. There's less stress now, buy, install and enjoy.



15.9 @ 86.7mph

Smooth idle? We don't need no stinking smooth idle.

Mods List:
http://highlander.dsmpower.com/sig.htm

  
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ThE oRACLeAug-27-03 06:29 AM
Member since Jun 04th 2003
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#57968, "RE: Underdrive pulley messes up engine"
In response to Reply # 5
 Aug-27-03 06:29 AM by ThE oRACLe



          

ive had it for almost 2 years now and no problems .. the install isnt to bad and you'll enjoy the quicker revs ... from what i hear our factory crank is very well built and is quite strong

oRACLe's 1997 RS




ThE oRACLe says: "I've got some yellow liquid for your popcorn ... and its non-dairy .."

  
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