Our car club the Gold Coast Muscle Car Assn. had a dyno day at ASG Motorsports not long avo, I am just across the road from thier dyno and workshop, and I got in quick to get the Skylark booked in through the club for a free dyno session! I made sure the car was ready, changed the oil to full synthetic and a nw WIX filter, drove dow to the airport fuel station and filled with premium unleaded. Got the car nice n warmed up then parked it Went over and got a feed at the club BBQ they had set up. Then Aaron indicted he would like my Buick up next so I went and got it. Aaron backed it up onto the rollers did the preliminies and got everything set up correct. Gave it 4 or 5 runs, then shut it down and came to the front line to tell he crowd what they hadnt heard before about Horsepower and Torque, stressing the big flat torque of my 455 how it made and pointed uout the mountain before they dissapear made 261 HP Chech the video out
Wouldn’t a basically stock stage 1 Dyno at 260 to the wheels? I can’t recall how non stock his engine is? Cliff
My 70 Stage 1 with mild build dyno reading for engine alone was 450hp and 550 lb/ft. That was with headers however.
Yeah mate its at the wheels on a chassis dyno in Australia, everyone knows USA dynos read higher.(for some strange reason) was that at the wheels or on an engine dyno?
whats yours put out at the wheels then? and 1/4 mile time? My lighter XYGT had 270 at the wheels and its a lighter car, would run 14.4 all day. Yet the basically stock Buicks best to date is 13.8 on a hot day. Proof these cars are driven by torque not horsepower. Id be interested to see your dyno figures and ET @HeavensDevil
I've had many runs on a chassis dyno and if you are at 300 HP (with torque usually higher) a usual weight GS should be sneaking into the 12's. Typical 455 will have noticeably higher torque than HP until the cam starts getting big and rpm goes up. Of course your driveline is a major factor especially how high the stall speed is on your converter. As OZ mentioned the 455 gets the good ET's with torque. I've said it before that you will be hard pressed to get "bragging" HP numbers out of a 455 compared to the brand X engines but the torque is usually up there. Too bad they didn't use RPM for the bottom line. Much more useful than "MPH". Actual torque numbers would be good too. If you ever do it again ask them to change the MPH to RPM and the TE to TQ to be more compatible to the numbers we'd typically get over here. It usually isn't a big deal to do it, just change the scale they are using on the readout.
Run it in the quarter mile. If you run over 100 in the traps you are doing way more than that 260. My stock 71 Stage-1 ran around 101-103 consistently. I forget HP to do that.
Chassis dynos are useless except as a tuning tool. You make changes while it's on the dyno and see if the numbers go up or down. Run the car down the track, much more useful.
Yeah Larry, the black dynos much more fun and I get to drive it. Couldnt pass up the offer of a freeby though. I already knew my HP would be down cos of my 13.8@98mph Also knew posting it on here would bring out all the tards and start a pissing contest
