Dyno Results Reported - For Bolt-on and Custom Parts or Modifications
This section is intended to give you a some information / feedback related to reported Dyno results. One has to keep in mind that test results are effected by a number of factors, and that results will vary from Dyno to Dyno. What is most usefull and meaningfull, are results taken on the same Dyno - on the same day using the same test procedures.
Note: For Easier Viewing Of This Data - You May Want To Open A New Window With This Frame
As of 18 Feb., 1999....cjb
Notes:
Car was driven to the dyno facility to ensure all fluids were at operating temperture. Most of the runs presented here were done back to back to minimize the influence of atmospheric changes; however, during the entire 5 hour test the air temperature vaired less than 4 degrees, and barometric pressure less than .02 in-hg. Temperatures were monitored for the transmission, diff, oil and water to ensure consistent drivetrain losses.
Header swaps were performed within 30 minutes. Car was run at varying speed on the dyno untill fluid temp.'s were back up to baseline.
Some graphs are shown with SAE corrected data, a few are not. This is because I had no control over the scaling that the viewing software chose and some graphics were simply easier to read as uncorrected. Regardless, the trends are the same.
The more modified your engine is, the more you have to gain with headers. These tests are for a basically stock L-24, if you have a 3.1L with a cam and a blower, all bets are off.
Most comparisons are without muffler and air cleaner, unless otherwise noted>
What Is Are Headers Really Buying You - Not Much (see below)
Rebello Modified vs Nissan Comp (same results as above)
2.5 vs. 3.0 Inch Exhaust Pipes (no gains - 3inch drops off power peak sooner)
It Costs You Nothing (in terms of H.P.) - To Run A DynoMax Super Trubo Muffler
The Air Cleaner Can Cost You About Four HP In The Peak Power Band (but well worth it)
Its Easy To Over Spend On Ingition - with little to no gain in hp.
