[Shotimes] 89 sho dyno charts posted

[Donald Mallinson]

Bill,

I doubt the Dynomax system is the problem.  it is bigger than stock and 
most people continue to lose torque with bigger and bigger exhaust.

Don

Bill Murray wrote:

>I wonder if the dynomax is holding back power.  Bob Bruce gained a decent amount of power when he went to the full 2.5 ich catback, and that was with stock cams.  Isn't the dynomax only 2.25"?
>
>Bill Murray
>-----Original Message-----
>From: "Justin Schick" <jschick@aafp.org>
>Date: 06/06/05 11:06 PM
>To: <shotimes@autox.team.net>
>Subject: Re: [Shotimes] 89 sho dyno charts posted
>
>Don,
>
>I've seen a few dyno graphs in my day but am no means adept at deciphering them, and am staring at a so-so laptop LCD. What happened to the performance seems to be what I'd expect with what mods were made. The intake path was opened up and the powerband moved up in the RPM range. The torque curve is now flat as Kansas and great for a track car. This is what I see:
>
>old
>max HP = 205 @ 6200
>max TQ = 195 @ 4750
>
>new
>max HP = 220 @ 6750
>max TQ = 190 @ 3500 - 4000, 4750 - 6000
>red (the first run) was better and more rich.
>
>If you want off idle torque, give it about 6 psi or another half liter of displacement! =)
>
>Justin
>parted 92 - need something (like an intake?)?
>
>  
>
>>>>Donald Mallinson <dmall@mwonline.net> 6/6/2005 7:45 PM >>>
>>>>        
>>>>
>I finally got the prints of my dyno test of the new .20 cam setup.  So I 
>don't use up bandwidth, I have put the dyno charts up on the shoclub.com 
>web site.  here is a short link:
>
>http://makeashorterlink.com/?A2625163B 
>
>I could not get the new charts on disk so I had to scan all of them.
>
>to my way of thinking, this is a much weaker engine than before.
>
>What can I do to get some power back...basically what I see is that 
>unless I want the engine to live above 6000 rpm, I am have gone way 
>backwards in torque and  HP.
>
>Exactly NOT what I wanted.
>
>Reminder.  The engine was basically a BOS with a Pro Flow 77mm with no 
>chip.  Ran great.
>
>Now same except with EH runners, BBB, Josh's .20 cams.
>
>Engine is healthy.
>
>What is it going to take to get back some of the power and torque below 
>6000 rpm except just putting it back to the way it was?  I expected to 
>have to run the engine a bit harder, but this is not good what I see on 
>these charts.
>
>any and all advice appreciated
>
>Don Mallinson
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