TAC
Well-known member
- Joined
- Feb 18, 2002
- Messages
- 252
- Location
- Bothell, WA
- Corvette
- 1987 Yellow Callaway TT Convertible & 2003 MY Z06
I had my '87 dyno'd today on the Dynapack dyno. Temp was around 50-55 degrees and it was raining. This is the dyno that bolts right onto the hubs and then induces a load with hydraulics. After blowing off my driver's side intercooler twice I got some pretty good runs. I used 10 gallons of unleaded race gas mixed with a little over 1/4 tank of 92. #s (all SAE corrected) are:
Rear Wheel 326.3 hp @ 3,582 and 514.57 lb ft @ 2984 rpm
Flywheel 378.5 hp and 596.9 lb ft @ same rpms as above.
The only mods to the car are new y-pipe w/out pre-cats and a Random Tech high flow cat.
One thing I am plagued with is an imperfect AF ratio. At the beginning of each pull the ratio starts at 14-14.5 and by 3k rpm it's down to 12-12.5.
The guy running the dyno had a few comments.
-The engine runs well and cools well. I never got above 200 degrees water or 170 degrees oil. The water temp would typically get to 190 and then drop back to 180 within 2-3 minutes.
-He could hear no detonation at all.
-Since the car has been dyno tuned for AF by a well known tuner in our area his suggestion is to get bigger injectors or a new controller if I plan on running the car hard (I'm not).
-race gas shouldn't have affected my results--it just made the engine run cooler during the runs. If I had it tuned for more advance I could pull more power.
I am pretty happy with the results. Comments?
Rear Wheel 326.3 hp @ 3,582 and 514.57 lb ft @ 2984 rpm
Flywheel 378.5 hp and 596.9 lb ft @ same rpms as above.
The only mods to the car are new y-pipe w/out pre-cats and a Random Tech high flow cat.
One thing I am plagued with is an imperfect AF ratio. At the beginning of each pull the ratio starts at 14-14.5 and by 3k rpm it's down to 12-12.5.
The guy running the dyno had a few comments.
-The engine runs well and cools well. I never got above 200 degrees water or 170 degrees oil. The water temp would typically get to 190 and then drop back to 180 within 2-3 minutes.
-He could hear no detonation at all.
-Since the car has been dyno tuned for AF by a well known tuner in our area his suggestion is to get bigger injectors or a new controller if I plan on running the car hard (I'm not).
-race gas shouldn't have affected my results--it just made the engine run cooler during the runs. If I had it tuned for more advance I could pull more power.
I am pretty happy with the results. Comments?
:eek 
