converting c20let to 2wd ????

[hurcombe_nova]

:mad: :mad: hi guys i need help... isit only the gearbox i need to convert or could i use a f20 box instead of the f28 ???

[Welsh Dan]

The most preferable option in the long run seems to be converting the f28 to FWD.

[staggy_gsi]

put an f20 on and see how it goes. if you prefer the gearing in the f28 then convert it

[letvalva]

dont fit an f20 it will keep blowing gear boxes mine did and so did my mates, stick the f28 in it worth it

[hurcombe_nova]

yes but is it only the gearbox that needs converting to 2wd and nothing else, so there aint much different in fitting the xe then ?

[Lee]

Nout wrong with using an F20 as long as you dont drive it like a cnut! F28's just add more weight to an already heavy front end!

[graham kirkbride]

Nout wrong with using an F20 as long as you dont drive it like a cnut! F28's just add more weight to an already heavy front end!

true true

[Adam]

A F16 well be fine on a LET too, as long as you dont go mad.

[Lee H]

Sort of defeats the object of a LET conversion though if you don't drive it hard. I ran mine with the F20 for a bit but knew it was on borrowed time when I upped the power so fitted the F28.

[Lee]

Sort of defeats the object of a LET conversion though if you don't drive it hard. I ran mine with the F20 for a bit but knew it was on borrowed time when I upped the power so fitted the F28.

Theres driving hard and driving like a cnut. Two different things.

Dave marshall's CS2 runs an F20 quite happily (and he doesnt pootle about) and Mark Watt's purple whanger ran an F20 quite happily as well.

[edens-xe]

f20's are good but there only geared for around 150. they can take the strain of a let if its standard but f28 is better top end. it all really comes down to how you intend to use the car (track car or jus mucking around in it!!!). up to you though

[letvalva]

Nout wrong with using an F20 as long as you dont drive it like a cnut! F28's just add more weight to an already heavy front end!

well when mine went i was driving normally just changing from 2nd to 3rd and it blew to bits, the f20's cant handle the torque the 20 in in f20 is for 200nm of toruqe and 280 nm in the f28, so from that i take it to be a stronger box

[mikey14sr]

yes but is it only the gearbox that needs converting to 2wd and nothing else, so there aint much different in fitting the xe then ?

Yep just the gearbox needs modding, remove the transfer box and use a seal carrier off an f20 or something, a few places sell the part needed with instructions.

[Ben]

Just find a F25 from a Vectra or Calibra/Cavalier and take the OS shaft out and then remove the plate with 5x Tourx bits (keep the nuts) this bolts straight onto the F28 without any tapping threads etc.

A F20 will run on a LET if you can drive.

[redrocket]

lost count of how many times i replaced the f20 if you got a let nova or corsa the f28 the only way!

[Lee]

Well it would appear your very good at finding sh1te gearboxes OR you cant drive!

As for the gearing, where on earth are you going to need more than 150 MPH top end???????????? Certainly on no british racetrack ive ever been on, let alone public roads!

My F20 has had some SERIOUS abuse this year, the one i had before this one died after two trackdays. As long as you find a good one, it'll be fine, thats the trick (bear in mind these boxes are getting on a bit now!!!)

[loggyboy]

the reason behind the numbers on the gear boxes are how much torque they can take. an f15 will take aprx 150NM, an f20 will take aprx 200, an f28 will take 280nm etc etc.
IIRC LET puts out just over 200nm so theres a good chance an f20 will go wrong if used with a let. If you wish to save weight and retain the 5 speed then consider better internals, gonna cost you lots for a quaife item but youl reap the benefits.

[R1CH]

If the F20 was fine to use on an LET then why did Vauxhall go to the bother of fitting it with the F28 ?!?
If your gonna do the job, you may as well do it properly !!

Rich

[Lee]

If the F20 was fine to use on an LET then why did Vauxhall go to the bother of fitting it with the F28 ?!?
If your gonna do the job, you may as well do it properly !!

Rich

Possibly because they needed a 4wd gearbox? :roll:

I agree with Loggyboy to an extent, that fitting stronger internals is a very good idea, but there is plenty of evidence to suggest that an F20 will handle a LET provided the driver isnt interested in full boar launches or digital gearchanges. Obviously if you start boosting it up, the F20 is going to start to struggle, but again, i will use Dave Marshalls as an example. Hes running Courtenay CS2 software, producing approx 245 bhp, hes run it at the pod and Shakespear county on numerous occasions this year, as well as a couple of track days, not to mention its a road car so gets abuse on road as well, and all he runs is a standard F20 and a quaife ATB.

To cut what will probably be a long arguement short, if you dont think you can operate a bit of restraint whilst driving, and dont care about the extra weight up front, get an F28. Simple as that.

[R1CH]

Possibly because they needed a 4wd gearbox? :roll:


Didn't they already have one in the Cav GSi 4x4 !?!?!?!
:tard: lol

Rich

[Lee]

Didn't they already have one in the Cav GSi 4x4 !?!?!?!
:tard: lol

Rich

Very good point, although the hallowed 4WD F20 would normally revert back to 2WD within 6 months anyway. Its transfer box was even chocolatyer than the F28 lol

[letvalva]

Very good point, although the hallowed 4WD F20 would normally revert back to 2WD within 6 months anyway. Its transfer box was even chocolatyer than the F28 lol

well if the 4x4 was too piss weak to use on them then the boxes must be too lol

[mikey14sr]

F28 came about because they went to getrag for a six-speeder, didn't have to fork out as much for development that way.

[Lee]

well if the 4x4 was too piss weak to use on them then the boxes must be too lol

I said the transfer box, not the box itself. :tard: