 
     |
| The Getrag F23 Tutorial - By Emc209i (Page 6/28) |
|
LEEEZARD
|
DEC 05, 06:52 PM
|
|
|
|
|
RULOOKIN
|
DEC 15, 10:00 PM
|
|
I have found a F23 with low KM i will keep as back up! Looks like the cables and HOTB adapter are available, now someone get on this fabrication of the mounts i am in for a set as soon as they are made !
Nice write up !
|
|
|
carbon
|
DEC 29, 02:20 PM
|
|
Well... it looks like I am doing this swap as well.  Thanks for the great write up!
I think I found someone locally looking to sell their custom shift cable...[This message has been edited by carbon (edited 12-30-2011).]
|
|
|
|
akademikjeanius
|
JAN 08, 01:44 PM
|
|
| quote | Originally posted by L67:
|
|
I'm still trying to understand this gearing thing:
Which would be most ideal for the Series III 3800 S/C swap? For fuel efficiency? For performance?
Everyone says the gear spacing is less than ideal. Does the different ratios affect this? Looks like the higher the FDR, the better the effiency, no? So the FY1 version would be more desirable for great fuel economy? How much would performance suffer?
Any and all answers are greatly appreciated.  [This message has been edited by akademikjeanius (edited 01-08-2012).]
|
|
|
|
Will
|
JAN 08, 02:39 PM
|
|
|
Keep in mind that if you get that particular transmission, you'll have to swap on the bellhousing from the earlier 2.2...
|
|
|
|
carbon
|
JAN 08, 09:10 PM
|
|
This is the one you want to get for the correct GM Metric bell housing...
It has a final drive ratio of 3.94:1
The other final drive ratios are obtained by swapping the bellhousing case half from the
Metric Cavalier 2200 tranny over to one of the Ecotec transmissions as shown above.
I don't really see a huge benefit from using the 3.63...
------------------
 [This message has been edited by carbon (edited 05-14-2013).]
|
|
|
|
L67
|
JAN 08, 10:14 PM
|
|
| quote | Originally posted by carbon:
I don't really see a huge benefit from using the 3.63...
|
|
Meh.. Good for hypermiling and those swapping from the duke with the Isuzu who want to maintain or improve their fuel economy. It's my favorite ratio.
Like I posted in the first post, there are three ratios.
3.63, 3.84, 3.95
3.63 - Similar to the Isuzu gearing.
3.84 - Similar to the original Getrag gearing.
3.95 - Similar to the 4:10 "rock crusher" Muncie gearing.
That's highly overgeneralizing things, but for the layman..
3.95 is really too short to be usable in a Fiero though. It was designed to get GM's small SUV's like the Saturn Vue rolling, much like the 4:10 was originally used in the Fiero because the Duke was so anemic.
Use the 3.63 if you want economy and have an engine with enough torque to still be able to get your car moving - the gears are tall. Use the 3.84 if you plan on drag racing or have a low torque engine that struggles to run through the taller gears of the economy gearing.[This message has been edited by L67 (edited 01-08-2012).]
|
|
|
|
mattwa
|
JAN 08, 11:07 PM
|
|
|
IMO the 3.84 is too short for my liking with a 3800 but I don't have a desire to buy two transmissions and piece them together for the 3.63 ratio, so I'll deal with it. I'll report what it's like when I get it going.
|
|
|
|
carbon
|
JAN 08, 11:14 PM
|
|
I suppose... anything is better than the f'ing TH125C and unreliable TCC I have now. ~3300RPM @ 70 MPH
I guess I am just inexperienced... I just don't see how less than 2 MPH in 1st and 131 RPM at 70 MPH in fifth is significantly taller.
Sorry, not trying to argue the point, just looking for understanding...[This message has been edited by carbon (edited 01-08-2012).]
|
|
|
|
L67
|
JAN 09, 12:18 AM
|
|
No kidding! The stock automatic is a piece of garbage.
The gearing ratios make a huge difference when going down a track. But when you're not racing for tenths of a second and making a trip up the road to work in the morning, the performance differences are moot.
Nick I didn't take what you said as argumentative at all, good questions. While the space is small between the first two gears, notice the third, forth, and fifth gear have a much larger discrepancy. The 3.63 gearing has an addition 10 mph at 6000rpm in 5th gear, 7 mph at 6000rpm in 4th, and 5 mph at 6000rpm in 3rd. That might not seem like a lot, but the effort required to row through those wider ranges is significant. Albeit the lower gearing has a greater top end, it takes much longer to get there. Also, if you look at the 70mph rpm, you're right, the differences are negligible, that's cruising RPM. The difference is when both cars are racing over short distances. If you raced two identical cars with the different gearing on the Bonneville Salt flats though, the taller geared car would probably win if the car has enough torque to make use of the taller gears and overcome drag.[This message has been edited by L67 (edited 01-09-2012).]
|
|
|
