F20/D20/F28 Revisited

daewooluvr · Post by **daewooluvr** » Thu Dec 22, 2005 9:21 pm

jonlint wrote:I am new to the forum, and I do not own a Daewoo but know Vauxhall Astras very well. I am scheming to build a rally Daewoo Lanos in the US, and I would like to know if anyone has the gear ratios and final drive ratio for the manual transmission 1.6L DOHC US-spec Lanos.

I am seeing conflicting information on the gear ratios for the US-spec 1.6L manual Lanos. The parts manual found on here shows a FD ratio of 3.72, but when I check on www.daewoous.com on their online parts ordering system, it shows only the 4.176 FD gear is available and for the transaxle as a complete part is shows "4.176 W/R" in the comments.

Could I ask a big favor of anyone with a US-spec Lanos - could you look through any brochure or owner's manual you have to see if any gear ratios are listed?

Thanks in advance for any help with the above.

Jonathan Linton

There should be two offered in the US. The sport model should have the lower gearing.

jonlint · Post by **jonlint** » Thu Dec 22, 2005 9:38 pm

Can anyone with a US-Spec Lanos Sport check their owner's manual?

jonlint · Post by **jonlint** » Sat Dec 24, 2005 10:23 pm

Stefan wrote:
daewooluvr wrote:are any of the F20 available in Canda?

Also how much power can each tranny handle?
You can use the D20 noted above, same as the Opel/Vaux F20.
As for power, there's a few throttle bodied Vauxhalls with 200-230hp that use them, but they have less torque than a turbo engine..........
Stef

We have a 230bhp XE throttled-body engine in our Mk3 Vauxhall Astra and have broken two (2) F20 gearboxes. One failure was probably not the box itself - we broke a tooth on the LSD spider gear, and had to ran a rally with it broken due to lack of time to get parts. We think the spider gear eventually broke and destroyed the box. The second failure, however was in third gear.

We eventually upgraded to a 6-speed sequential.

Audacity Racing · Post by **Audacity Racing** » Thu Dec 29, 2005 12:15 am

it's been asked a million times, but for my sake and the sake of the future of daewootech...

what are the ratios for the sport transmission?

MMamdouh · Post by **MMamdouh** » Thu Dec 29, 2005 12:17 am

isn't it the same as the close ratio F16??

MMamdouh

Stefan · Post by **Stefan** » Thu Dec 29, 2005 4:32 pm

jonlint wrote:
Stefan wrote:
daewooluvr wrote:are any of the F20 available in Canda?

Also how much power can each tranny handle?
You can use the D20 noted above, same as the Opel/Vaux F20.
As for power, there's a few throttle bodied Vauxhalls with 200-230hp that use them, but they have less torque than a turbo engine..........
Stef
We have a 230bhp XE throttled-body engine in our Mk3 Vauxhall Astra and have broken two (2) F20 gearboxes. One failure was probably not the box itself - we broke a tooth on the LSD spider gear, and had to ran a rally with it broken due to lack of time to get parts. We think the spider gear eventually broke and destroyed the box. The second failure, however was in third gear.

We eventually upgraded to a 6-speed sequential.

I should of stated that these were road going cars with 200-230hp and not track day/competition cars. IIRC third and fifth are common failures on F-series equiped competition cars.

Stef

MMamdouh · Post by **MMamdouh** » Sun Jan 08, 2006 10:45 pm

what tranny comes on the 1.6 Nubira?? is it a D20 or F16?? we swapped a 2.0 into a 1.6 nubira and we are still using the OEM tranny... any concerns about how well the tranny will hold to the torque increase from the 2.0??

MMamdouh

Post by **Efratech** » Tue Jan 10, 2006 4:00 am

D16... maybe with the 4.18 final drive.

with will hold ok.

is still a stock engine. so no worries.

cpd · Post by **cpd** » Sun Feb 05, 2006 6:21 am

Ok, so I've got another question:

Will the stock gearbox out of a 1.5i hold a C20XE down? I believe the details on the box are as such:

Trans Ratio

Ratio 5
0.707:1

Final drive ratio
3.940:1

Final drive location
Front

Trans Ratio

Reverse
3.333:1

Ratio 4
0.892:1

Ratio 1
3.545:1

Ratio 3
1.276:1

Ratio 2
1.952:1

So pretty much I don't know. I don't want to have to get an F20

ant0ny · Post by **ant0ny** » Tue Feb 21, 2006 11:20 am

cpd,

I have a 2.0lt JE Camira (SOCH 8valve) engine worked putting out 110+hp at the wheels with 450lb of Torque in my 15i with the sandard F16WR box... Not a problem at all. Depends on how standard the C20XE is I guess... check with anyone running that motor with the F16 box here or on the http://www.astra-mk2.com forum the guys in the UK have done this all before they will be able to tell you what you can get away with.

I'd be more woried about the drive sharfts.. I have the JE camira ones bigger wheel bearings, sharfts and cvs (from memory).

...but don't go out and try this without asking for more info.. there are a few things to know before do a Holden Camira to Daewoo conversion.. nothing major just a few gotcha's to watchout for.

Ant

pontiacjeff · Post by **pontiacjeff** » Tue Apr 25, 2006 3:21 pm

ant0ny wrote:cpd,

I have a 2.0lt JE Camira (SOCH 8valve) engine worked putting out 110+hp at the wheels with 450lb of Torque in my 15i with the sandard F16WR box... Not a problem at all. Depends on how standard the C20XE is I guess... check with anyone running that motor with the F16 box here or on the http://www.astra-mk2.com forum the guys in the UK have done this all before they will be able to tell you what you can get away with.

I'd be more woried about the drive sharfts.. I have the JE camira ones bigger wheel bearings, sharfts and cvs (from memory).

...but don't go out and try this without asking for more info.. there are a few things to know before do a Holden Camira to Daewoo conversion.. nothing major just a few gotcha's to watchout for.

Ant

I'd like to kow the conversion factor for AU torque ratings! 450lbs.ft. of torque in the US is only seen in large displacement V-8's!!!!!!!

Post by **Efratech** » Tue Apr 25, 2006 4:35 pm

cpd, ive the XE with the F16, i broke one F16 but that one had lots of years of pure abuse, putting the XE in was the "instant" death for her, this one has been ok for a while.

pontiacjeff torque ratting should be a typo

pontiacjeff · Post by **pontiacjeff** » Tue Apr 25, 2006 5:13 pm

Efrain A. wrote:cpd, ive the XE with the F16, i broke one F16 but that one had lots of years of pure abuse, putting the XE in was the "instant" death for her, this one has been ok for a while.

pontiacjeff torque ratting should be a typo

Typo I hope! More likely 150lbs.ft.

Post by **Efratech** » Tue Apr 25, 2006 5:27 pm

ant0ny · Post by **ant0ny** » Thu Apr 27, 2006 6:26 am

pontiacjeff wrote:
I'd like to kow the conversion factor for AU torque ratings! 450lbs.ft. of torque in the US is only seen in large displacement V-8's!!!!!!!

Au torque rating are same as US just upside down

Sorry to burst your bubble...

Bottom end was built buy a guy who normally builds drag motors... I just asked for good torque as it being a front wheel drive supposed to be for rallying on dirt.

This day we just installed the LINK Computer and we found the clutch was slipping. Latter we have ran it upto 110Hp with a clutch replacement and now it would be closer to 120+Hp on race fuel and a few more tweaks running on the track with the laptop fine tuning it.

Ant