Is there a certain gear that they dyno the car in? Is it different with different transmission like the 6spd or 5spd??? Thanks...

 

auto in 3rd gear manuals in 4th gear.

 

So what if they dyno in third gear on a manual?

 

numbers wont be accurate. in any tranny you want the 1:1 gear, which is 4th on the m6 as stated.

 

What about on a 5 speed?

 

4th. mosts manuals whether 5 or 6 sp are 1:1 in 4th. in a 5sp 5th is OD and in a 6pd 5 and 6 are OD.

 

Exactly. Thats why with the M6 the 6th gear is .50:1 giving it 34mpg, even with a cam. From what i hear autos only get 26-28mpg.

 

Because my friend dynoed his Mustang but the guy dynoed it in 3rd gear.......so his numbers weren't accurate then?

 

here's a dyno of my 99TA in 2nd vs 3rd. hp the same. tq is higher. this is an auto.

2nd gear 251.6 rwhp and 252.5 rwtq
3rd gear 250.5 rwhp and 277.1 rwtq
2nd gear closed hood vs open hood


3rd gear closed hood vs open hood

 

Yep, exactly!

 

Those are some really low dyno numbers. I guess that was stock along time ago.

 

He dynoed 245hp/281tq in 3rd gear, what would that likely be in 4th?

 

nope that was car bought 3 weeks ago and strapped down. car with 94k on the clock all stock. engine temp to operating temps (190-205). hood closed on the 250 numbers. after all that's the way you drive it. i later changed plugs and wires and got 10 more hp.

 

4th the gear because it is 1:1 ratio, weather 5 speed or 6 speed.

 

Hard to say. Could be another 10 to 25 more. Most likely in the high 250's. and closer to 300ft-lbs.