I have finally convinced my boss to buy a dyno. We are currently looking in to Dyno Dynamics, and Dyna Pak. I have always favored the Dyan Pak, until i saw that it uses hub speed to read RPM. OK, sound fine till I try to dyno a 1970 Chevy Nova with a Manuel rev. valve bodied turbo 400 with a 4100 RPM stall speed. How are you guys that own and operate a dyna pak getting past this? I called Dyan Pak today and they said that there has been research into a RPM hook up, and that it has been going on for 4 years, with no end in site. Please help i don't wanna give up on dyan pak yet.

 

bump

 

What specifically do you anticipate would give you a problem when running a vehicle such as the one you described? As long as you configure the Dynapack for the particular vehicle you're running, you shouldn't have any difficulties.

 

no inductive pickup for the plug wires????????? never looked into it but must be available

 

I'm not sure that you'd have a problem, especially if the wheels don't move till 4100 rpm anyway.

If it has a 4100 rpm stall converter, do you really care how much power it makes below 4100?

Personally though, I own a Dynojet 224x, and based on my experiences with many dyno's, if I were to buy another, it would probably be the dyno dynamics. Dynojets have NOTORIOUS problems with RPM pickup, and customer service isn't all that great at solving the problem, or remembering to ship out replacement parts as needed..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">What specifically do you anticipate would give you a problem when running a vehicle such as the one you described? As long as you configure the Dynapack for the particular vehicle you're running, you shouldn't have any difficulties. </TD></TR></TABLE>
No, its like this. the dyno uses hub speed to get an RPM signal. which means if i were to run an auto trans car with a stall converter the engine speed and tire speed are not proportional. Or think of this, dyno a stick car with a slipping clutch, the clutch begins to slip which alows the RPM to increase but the dyno doesnt recognize this cause it saw no change in hub speed. get me? any one from Church auto on here wanna chime in?? thanks for all the above replies.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fulldragcrx &raquo;</TD></TR><TR><TD CLASS="quote">
No, its like this. the dyno uses hub speed to get an RPM signal. which means if i were to run an auto trans car with a stall converter the engine speed and tire speed are not proportional. Or think of this, dyno a stick car with a slipping clutch, the clutch begins to slip which alows the RPM to increase but the dyno doesnt recognize this cause it saw no change in hub speed. get me? any one from Church auto on here wanna chime in?? thanks for all the above replies. </TD></TR></TABLE>

I understand what you're saying to a degree. However, with the Dynapack, shouldn't you be able to dyno in a low enough gear to prevent the converter from slipping excessively, thus maintaining an accurate speed/RPM ratio?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">

I understand what you're saying to a degree. However, with the Dynapack, shouldn't you be able to dyno in a low enough gear to prevent the converter from slipping excessively, thus maintaining an accurate speed/RPM ratio?</TD></TR></TABLE>
what gear your in doesnt change the stall speed or slippage of a converter, hence my problem with dyna pak. thanks for the thought though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fulldragcrx &raquo;</TD></TR><TR><TD CLASS="quote">what gear your in doesnt change the stall speed or slippage of a converter, hence my problem with dyna pak. thanks for the thought though. </TD></TR></TABLE>

The articles and information I read regarding high-stall converters stated that slippage increases in higher gears (in some cases actually hurting drag E.T.'s). As I said, I have no direct experience with them, but that's the information I came across.

 

bump again