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Topic: Like dyno graphs? (Read 1984 times) previous topic - next topic

Like dyno graphs?

Reply #15
An auto will show lower dyno results, but not THAT much lower.....Mustang dynos typically show lower results than a Dynojet would as well.  What cam is in that thing?  I know you say it's the same as an HO, but what year?
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

Like dyno graphs?

Reply #16
Even if your shifter was in O/D the transmission should not have actually shifted into overdrive on a dyno unless he was going like 100+ mph unless your TV cable is fubared out of a adjustment.
One 88

Like dyno graphs?

Reply #17
Quote from: sum_weirdo;181165
Keep in mind it's not a manual transmission.  The dyno guy's been doing this day in, day out for years, I have to believe he knew what he was doing even if I don't know how he did the math.


Yes, a good condition AOD will have around 20% parasitic loss.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Like dyno graphs?

Reply #18
Okay the dyno guy finally replied to my email and this is what he said:

"The tests were run in 3rd as second cannot be manually selected on your car. The conversion I use for SAE net is as follows:
 
((Wheel HP) + (auto trans loss)) / 0.75
 
(159+25)/.75 = 245.3 HP SAE Net."

I'm not sitting behind the wheel at the moment but I don't remember my car having an option for 3rd.  And anyway my gear ratio graph has 3rd as the 1:1 gear not 0.75:1.  Guess I gave the guy too much credit for experience....

Oh well.  I kinda had the timing screwed up for that run, I'll probably do better next time.
1983 Thunderbird-302 HO, Holley 650 CFM 4150 DP, Weiand Stealth Intake, Dual-Snorkel Air Cleaner,  Holley Fuel Pump, Procomp HEI Distributor, B&M Holeshot 2400 Converter, Custom 2 1/4 duals with no cats and BBK shorties, Taurus Fan Conversion, FMS Grill, much more to come....


"In the future, I plan on taking more of an active role in the decisions I make" - Paris Hilton

Like dyno graphs?

Reply #19
Stared at the gear selector a bit on the way home.  Like I thought there's no selection for third gear.  But interestingly enough the 3rd selection up is the Overdrive.  Now I know it's been said that it's doubtful the transmission would shift into Overdrive on hard acceleration but I know it has before during a little street race.  Besides he didn't stab the gas and go to town with it, he ran it in the midrange for a bit before going for broke.  And the overdrive ratio is about right for these results.  Just speculation I guess.
1983 Thunderbird-302 HO, Holley 650 CFM 4150 DP, Weiand Stealth Intake, Dual-Snorkel Air Cleaner,  Holley Fuel Pump, Procomp HEI Distributor, B&M Holeshot 2400 Converter, Custom 2 1/4 duals with no cats and BBK shorties, Taurus Fan Conversion, FMS Grill, much more to come....


"In the future, I plan on taking more of an active role in the decisions I make" - Paris Hilton

Like dyno graphs?

Reply #20
Not suprisingly, most of this is way over my head... Nice numbers though! lol