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Went to the dyno today!

  • Thread starter Thread starter Flghtmstr1
  • Start date Start date Nov 11, 2007

Flghtmstr1

Member
Mar 31, 2005
572
4
19
Springfield, PA
Nov 11, 2007
#1
  • Nov 11, 2007
  • #1
Today I made my first visit to the dyno. I put down 240rwhp and 280rwtq on a Dynojet, which I was very pleased with, considering my car is an auto and I have very few power mods. It was a fun day, and the shop was great to work with. I got a printout with both the power/torque curves AND a chart with the datapoints used to make the graph. I can scan it and upload if anyone's interested.

Unfortunately, in the excitement of the event, I forgot to use a fan and didn't let my car cool down between runs; I just pulled onto the roller, let them strap it down, and made my 3 pulls. I don't know if it would have made a difference for me, but I know my friend's naturally-aspirated Dakota R/T gained 20rwhp today between runs by using the fan, letting his truck cool down between runs, pulling the air filter off, and running a short belt. His truck put down 250/330 initially, and 270/340 on his second run.

So, does Stangnet think I would have made more power if I had done those things? What if I add a 75mm Accufab tb/plenum and magnaflow catback, my next planned mods?
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Nov 11, 2007
#2
  • Nov 11, 2007
  • #2
If you open up the intake/exhaust it will help out. Just keep an eye on your air/fuel ratio... I have a K&N intake, 75mm tb, and RPM ported plenum and my A/F ratio was a little high, I had to richen it up via Diablosport tuner.

I found the throttle body/plenum combo to help out quite a bit on the top end. Same with the X pipe...
 

Flghtmstr1

Member
Mar 31, 2005
572
4
19
Springfield, PA
Nov 11, 2007
#3
  • Nov 11, 2007
  • #3
BurningRubber said:
If you open up the intake/exhaust it will help out. Just keep an eye on your air/fuel ratio... I have a K&N intake, 75mm tb, and RPM ported plenum and my A/F ratio was a little high, I had to richen it up via Diablosport tuner.

I found the throttle body/plenum combo to help out quite a bit on the top end. Same with the X pipe...
Click to expand...

What numbers did you put down? My A/F ratio was between 13 and 13.5 the entire run, and the graph was very smooth. I already have a tune, and although it was just a "mail-order", it is apparently spot-on according to the shop where I dynoed.
 
N

Nightstick

New Member
Jul 1, 2007
68
0
0
Nov 11, 2007
#4
  • Nov 11, 2007
  • #4
You put down almost the exact numbers as my 01 did with these mods:

Amsoil filter/silencer delete, C&L plenum, SCT tune, Borla Exhaust, SLP catted X-pipe

But this is with a 12.5:1 ratio most of the run...a tad rich but safe.
 

BurningRubber

10 Year Member
Dec 6, 2004
1,865
24
58
Nov 11, 2007
#5
  • Nov 11, 2007
  • #5
Flghtmstr1 said:
What numbers did you put down? My A/F ratio was between 13 and 13.5 the entire run, and the graph was very smooth. I already have a tune, and although it was just a "mail-order", it is apparently spot-on according to the shop where I dynoed.
Click to expand...

258/314 at the wheels.

My AF was 13.6 or so to start, down to a 13.3-13.4.
 
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