Why so high final drive ratio?
Senior Member
Joined: 06-09-2007
Posts: 114
From: Newark, Ca.
The SS is not about mpg it`s about fun and fun = torque,hp,and rpm`s
The SS auto has less hp and 225 lbs of torque@1,650 rpm
manual is 260 hp@5,300 rpm and 260 lbs of torque@2,000 rpm
manual is 260 hp@5,300 rpm and 260 lbs of torque@2,000 rpm
As far as mpg and those numbers I came up with. I didnt produce the formula I just used the numbers provided by c2vette and from GM. Now c2vette came up with a 3.91 final ratio for the auto which I cant find on the GM site. I used the posted 3.29 final ratio on the GM site.
Now for your "its about MPG" reference. 1 mpg difference between the two at freeway speed really gets me excited, NOT!
Senior Member
Joined: 10-22-2007
Posts: 104
From: Grand Blanc, MI
So you think those cars in that video are Manuals? When the guy mentions getting the clutch to work correctly hes talking about a clutched automatic. This is what the pro stock NHRA guys use as well as the exteemly high HP cars in like the outlaw or 10.5 tire classes.
Lets not get into the auto vs manual drag racing debate. I know this guy or that guy thing.
I ran a 8 sec 1970 Camaro 897hp with 500hp of nitrous on top of that and used a 2 speed automatic. No one ran or runs manual running those kind of numbers!!!
Its a known fact that autos rule the drag strip.
Lets not get into the auto vs manual drag racing debate. I know this guy or that guy thing.
I ran a 8 sec 1970 Camaro 897hp with 500hp of nitrous on top of that and used a 2 speed automatic. No one ran or runs manual running those kind of numbers!!!
Its a known fact that autos rule the drag strip.
That's a stretch of the truth, I see that damn car EVERY weekday of my life I work for Dan Millen, have been at the track w/ him (NMCA Finals this year) and its a Liberty 5-speed chief, which is not a clutched auto... Why don't you watch the whole video, you can definately see him shifting it on the street. That's like saying a face-plated t-56, or a pro-shifted t-5 isn't a manual.
Senior Member
Joined: 06-09-2007
Posts: 114
From: Newark, Ca.
When you have to push the clutch to shift then its a manual. Its a manually shifted auto.
There hybrids.
Take your everyday T56 manual and put it in those cars and see how well they do.
I had a chevelle with a manual TH400. I shifted it on the street didnt make it a manual.
There hybrids.
Take your everyday T56 manual and put it in those cars and see how well they do.
I had a chevelle with a manual TH400. I shifted it on the street didnt make it a manual.
Senior Member
Joined: 07-22-2006
Posts: 118
From: Dixie
Pat
Senior Member
Joined: 11-27-2007
Posts: 1,115
From: Austin, Texas
I have seen 2 different final drive ratios for the stick, and 3 different ones for the auto. I think to settle this whole thing, we just need a 5 speed owner and a auto guy to tell us what rpm they turn in top gear at 65 mph, then easy to work the number backwards.
Platinum Member
Joined: 05-09-2006
Posts: 6,805
From: "Upland" Mesa, Arizona
2.4 VVT, Automatic, completely stock
Turns 2300-2400 rpm (tach display has no hash markings for each 100 rpm, so it's an estimate) at 65 mph on flat road.
Does this help???
Oh, and could the rpm reading be different for the 2 base (non SS) engines???
Turns 2300-2400 rpm (tach display has no hash markings for each 100 rpm, so it's an estimate) at 65 mph on flat road.
Does this help???
Oh, and could the rpm reading be different for the 2 base (non SS) engines???
Senior Member
Joined: 06-27-2006
Posts: 732
From: Kingsville On
Ok just got this info from member Ween that was nice a nuff to do a real test with a real SS 5sp.He came up with 67 mph at 2500 rpm that is 5mph better than than my 07 2.2 5sp.
Can someone that has a SS auto do the same test and report back to this thread so we can put this thing to REST.
As I can`t take much more of cars with 1375hp that one cost me my underware,pants and a $79.00 computer chair.If we get up to 2,000 hp I think my appendix may blow
Can someone that has a SS auto do the same test and report back to this thread so we can put this thing to REST.
As I can`t take much more of cars with 1375hp that one cost me my underware,pants and a $79.00 computer chair.If we get up to 2,000 hp I think my appendix may blow
Senior Member
Joined: 09-20-2009
Posts: 1,058
From: Hayward, Ca.
I won't mention names, but some of you have your head way up, where the sun don't shine.
A SS 5sp manual vs a SS Auto, same HP, the auto will put the powder down, and consistantly better than a shifted SS. Shifting manually, I don't care how good you think you are, you will not and can not be consistant. A Auto takes almost all of the driver error[read "Rookie"] out of the equation. Unless they have raced for many years, and behind the same car, you will not shift at the right time, every time. Bottom line, 5 sp eats it-goes home.
Given the ratios stated for both the SS manual and the Auto, the Auto has a slight edge on the top end, no matter what you think. "Moon"
A SS 5sp manual vs a SS Auto, same HP, the auto will put the powder down, and consistantly better than a shifted SS. Shifting manually, I don't care how good you think you are, you will not and can not be consistant. A Auto takes almost all of the driver error[read "Rookie"] out of the equation. Unless they have raced for many years, and behind the same car, you will not shift at the right time, every time. Bottom line, 5 sp eats it-goes home.
Given the ratios stated for both the SS manual and the Auto, the Auto has a slight edge on the top end, no matter what you think. "Moon"
Senior Member
Joined: 09-20-2009
Posts: 1,058
From: Hayward, Ca.
As a footnote to my above post.
In the quarter mile, the Auto crosses the finish line at the top of third gear. the Manual will have to shift into 4th gear before the finish line. Now smarta--es do the math. Whole different ballgame now, is'nt it. "Moon"
In the quarter mile, the Auto crosses the finish line at the top of third gear. the Manual will have to shift into 4th gear before the finish line. Now smarta--es do the math. Whole different ballgame now, is'nt it. "Moon"
Platinum Member
Joined: 01-09-2007
Posts: 16,081
From: SE USA
Moon-
I thought the SS auto was de-tuned to a lower HP. As compared to a stick shift.
Automobile Magazine:
To get the full corral of ponies, you need to get the manual transmission; the engine in the automatic-equipped car is detuned to 235 horsepower, in deference to the four-speed automatic's fragility. As a further enticement to shift for yourself, Chevrolet has shortened the manual's shift throws and moved the shifter both forward and up, so it's not such a far reach. Unfortunately, the shift action is pretty notchy.
I thought the SS auto was de-tuned to a lower HP. As compared to a stick shift.
Automobile Magazine:
To get the full corral of ponies, you need to get the manual transmission; the engine in the automatic-equipped car is detuned to 235 horsepower, in deference to the four-speed automatic's fragility. As a further enticement to shift for yourself, Chevrolet has shortened the manual's shift throws and moved the shifter both forward and up, so it's not such a far reach. Unfortunately, the shift action is pretty notchy.