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What does the '20' in F20 signify?

1K views 22 replies 12 participants last post by  chip  
#1 ·
Im sorry i know this is a repost but i cant find the thread and im trying to tell someone that the 20 in F20 signifies its ability to take 200nm (150bhp odd) of constant power (and the f28 being 280nm).

Also would an F20 be suitable for a V6 (calibra 190bhp iirc)

Does anyone still know? Someone had proof, i think it was chip or chavtastic.

Thanks Chaps.
 
#11 ·
TIS lists specs for the later boxes (94 on) and apart from the F18 they are all the torque rating in Nm.

the F18 is 205Nm (replaced the F20)

I run 230lbft through my F20 with Quaiffe.
 
#12 ·
king nero said:
don't know what exactly you mean, but the R stands for RWD design :confused:
i didnt know that lmao

Mark T said:
TIS lists specs for the later boxes (94 on) and apart from the F18 they are all the torque rating in Nm.

the F18 is 205Nm (replaced the F20)

I run 230lbft through my F20 with Quaiffe.
the f18 gearbox personally i would not choose myself :doh: i have removed and refitted way too many subframes on vectras when converting the f16 to fit instead of the f18 its probably just as bad as the transfer box they put in callibras.
 
#13 ·
My belief is its a number based on engine sized it was mainly used with

F10 = 1.0
F13 = 1.3
F16 = 1.6
F18 = cav 18td
F20 = 2.0
F25 = 2.5
F28 = 2.0 (*1.4 for turbo, which is standard in many motorsports)


However thats by no means conclusive proof thats where the numbers come from


The torque thing is a nonsense though for certain IMHO even though people have posted evidence about it on here, cause the F18 completely doesnt fit that.


Whatever the numbers mean (if anything) they only mean it very loosely.
 
#14 ·
Yeah, I am sure the coupe turbo has something like 240nm as std and its running an f23, so I guess thats blown out the water.

And with all the mods available for the zlet, the 'box would fall apart fairly quickly?

I am going to go with chip on this one. :)
 
#15 ·
chip said:
My belief is its a number based on engine sized it was mainly used with

F10 = 1.0
F13 = 1.3
F16 = 1.6
F18 = cav 18td
F20 = 2.0
F25 = 2.5
F28 = 2.0 (*1.4 for turbo, which is standard in many motorsports)


However thats by no means conclusive proof thats where the numbers come from


The torque thing is a nonsense though for certain IMHO even though people have posted evidence about it on here, cause the F18 completely doesnt fit that.


Whatever the numbers mean (if anything) they only mean it very loosely.
ecotecs use f18s so im told and the diesels a 1.7? didnt it have a wide ratio version of something f16/18
 
#16 ·
Jasovanooo said:
ecotecs use f18s so im told and the diesels a 1.7? didnt it have a wide ratio version of something f16/18
As i said, whichever "meaning" you put on it simply doenst hold water.

And the 1.7 thing might make sense if they class a TD as 6% more than petrol or whatever.


Eitehr way, its NOT accurate wether it references engine size or torque.


F28 can take a LOT more than 40% more torque than an F20 for example!
 
#18 ·
Back in the day, it was a reference to torque capability. Now they're just numbers.