Firstgens.com

Got your e-mail Jim.Glad you had a safe trip.

I have an oppourtunity to chassis dyno the 68 for $50/2 pulls/no tuning.

Anyone care to share their experiances on the rollers..good and bad.

I heard a guy ask a shop recently about dynoing his car. The response was
"Three baseline pulls would be a couple hundred $ without tuning"

Also note, do some utube searching to see what not to do. Some crazy stuff happens on them.

Pictures and video are requested if that awesome Camaro of your's get strapped to the rollers

David F.

no, this is not a wet blanket. Strapping it down to the rollers and pulling agianst the dybo is a blast, no doubt, and the price they are wuoting you is good for an hours fun.

but.

The dyno is a tuning tool, nothing more. The numbers are basically meaningles, and good only for cruise night bragging rights.

to dyno without tuning is to waste your time.

4 pulls minimum, with tuning. direct readouts of EGT, AFR, and BSFC. You'd buy the jets, wieghts and springs, and round here would pay about $120 per hour, and get your 4-5 pulls done in 2-3 hours.

Yes, Jim has enjoyed his margaritas tonight.

Found a local Jr College in my area, putting on a Dyno Day on a Mustang chassis dyno. Got two good pulls , they even learned how to hook up the O2 set up, they never did that before. They never ran a car with headers uncorked. Before it was over, had the whole school awake. They got a $50 donation to a worthy cause. Did 375 rwhp, about 355 tq at 6130 rpm. Thats about what my cam card say the power limit is. Not bad for a street cruiser and 23 mpg.

Sure is a whole lot better than the Dynomax pull I did at the Little Rock power tour start. Come to find out, I had one cly that the rings were stuck in the top ring gland. Too much Indian Head shellac I guess. Leak down revealed a 70% loss on that cly. .

Actually Jim..I am not interested in empircal data.
I could care less what the #,s show on the chassis dyno.That was never my intention.
What I do want to do is put the engine and powertrain under load in a safe and controlled environment.
I would feel confident knowing that the throttle does not stick wide open..the dipstick does not launch into the stratosphere and spew oil over hot headers..driveline anomolys and such.
Seems to me..finding errors before hand on a chassis dyno...trumps finding them on the road or at the track.
On surface streets in Metro Motown..very limited real estate to open up a blown big block in a 1st Gen F body..but would be nice to know the combo will not screw up if driven to a track for test and tune night.

very good points all George.

Unless your engine was dynoed and setup by a pro when it was built, I'd still pony up for some tuning tho.

Duly noted Jim.
I do my own building but not machining.I leave that to Denny Hummel @ Booth/Aarons in Berkley Mi.
I tune my blown big block for the street..gotta a good feel for it after 3 decades of wrenching across the board.Everything from semis and heavy equipment right down to motor scooters.Forced induction bbc,s tune ups are not difficult..but will tax everything else to the extreme.Thats why I would rather fail on the chassis dyno vs the open road or track.