[Shotimes] New +20 cam dyno results

[Bruce Malachuk]

Where are these results? Did I miss the posting somewhere?
 


Bruce J Malachuk

*	94 Opal Frost MTX 
*	93 Emerald Green MTX - SOLD 
*	93 Black ATX - New Parts CAR 
*	95 Silver Frost ATX SE - SLO -Buyer waiting 
*	96 TR - Cam Failed parts car :-(


-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Ron Porter
Sent: Sunday, May 29, 2005 1:31 PM
To: 'Donald Mallinson'; shotimes@autox.team.net
Subject: RE: [Shotimes] New +20 cam dyno results

Results look pretty good to me!!

I have not been following anything on the new cams offered, nor any of their
specs, but don't these cams increase duration & overlap? If that's the case,
then what you are seeing is pretty typical for that kind of a cam mod in any
kind of engine (OHC, OHV, etc).

If you just increased lift, and left duration/overlap alone, you would have
seen more gross torque throughout the range.

Cam upgrades are one of those mods that can make nice gross HP numbers, but
don't necessarily make the car feel any quicker as they shuffle the torque
curve around (unless gearing changes are made).

However, for a track car, having a nice, flat torque curve is a pretty
desirable thing, as is having a nice, wide rpm range that develops power for
those times that a gear change (with the stock cams) just comes at the wrong
time on a track.

Ron Porter

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Donald Mallinson
Sent: Saturday, May 28, 2005 1:51 PM
To: shotimes@autox.team.net
Subject: [Shotimes] New +20 cam dyno results

Just got back from the first dyno test of the '89 with the new setup.  
Here are the details:

Previous tests:
205-207 hp at 6100 rpm
196 lb ft at 4800 rpm  and 190 @ 3100 rpm (before runners open) 180,000
miles on the car/engine now, test above done at probably 165,000 miles.
Engine is healthy using about 1/2 quart per 3000 miles like it has since it
was 45,000 miles young when I bought it.

BOS basically, without a computer chip, running a Pro-Flo 77mm Maf.  
Walker exhaust with generic turbo mufflers.

New:
+.20 cams
EH intake runners
BBB
new cam belt, plugs, wires, with NO computer chip or tuning, same setup
otherwise as above.

220hp @ 6700 rpm
182.5 lb/ft @ both 3500  and 5500 rpm  Torque basically flat between these
rpm's except for a slight dip when the runners open at 4000 rpm.

Air/Fuel mixture is basically 13-1 from about 3700 to 5700 rpm and then has
a slow drop to 11.5-1 at 7000 rpm.

First, I am shocked at the loss in torque, this is the exact opposite of
what I wanted.

Second I am a bit disappointed in the HP gain, but maybe more is to be had
with some computer tuning.

So tuner guru's..... a couple questions:  Where did my torque go and will
tuning get any of it back?  Is there more HP to be had?

Don Mallinson
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