Dyno Results

[TnBlkC230WZ]

I had the car dyno'd yesterday to see how close I am to my goal of an of an honest 400 flywheel horsepower. I know it is a chassis dyno, so I'm assuming an 18% power train lose. There was a significant increase from my last runs.
The last run was a best of 262 HP at 5250 with a rapid power fall off at 5500. The motor was done at 5600 RPM. New run is 328 at 5600 and is still making over 310 at 6200. I was very excited. The guy doing the runs said there was another 5 - 10 HP with a little carb tuning (running rich at WOT)

The engine is a ZZ4 with the following mods made after the first runs:

Comp Cams 26995 behive valve springs, retainers and chromoly push rods
Manley Street flow valves with under cut stems - stock size
Competition valve job and milled .008 - no other head work
GMPP 1.6 roller rockers
Weiand Stealth Air Strike intake.
Compression Ratio averages 10.1:1

The following upgrades were made from the first run

replaced the Eddy 1405 with a Holley 750 4160 that has a close tune - As GM intended
Replace the cheapy electric pump with a Mallory Comp 70
Installed an electric fan.
Replaced 1.625 headers with 1.75 - As GM intended
Replaced the Flowmasters with Magnaflows and an X-Pipe.



I'll start the EZ-EFI install this weekend and rerun when done. I'm curious to see if it helps. Thanks to Mike Norris for hooking me up with the EZ-EFI