F16/f20/f28

[MattBrown]

Right guys.

Got this let coming, Its on an f20 atm, LEEH has donated a pot flywheel if needed for an f28, but, will the f20 be ok?

I really want the 6 speed, i think its kinda cool to have a 6 speed novalol

But will the 5 speeds take the punishment I will give them? 280bhp aswell

Also, do you need an internal shifter for the 6 speed?

Or can I use a normal linkage?

[John]

Rich runs an f20 on his no probs. dave marshall also ran an f20 on his 280bhp let no probs. Just find a good one, do a full gasket rebuild and get some good fresh oil. All Imo of course.

[John]

another of your threads missing a poll matt! lol

[napalm_27]

im going from a f16 to my f28 this week i think its a must to be uber cool lol

[MattBrown]

another of your threads missing a poll matt! lol

I don't understandlol


It seems to be choice, as the lad in total vauxhall, recons he put 20 boxes in his 280bhp let astra.

Rickardo had 240bhp, but never leathered it in 1st or 2nd:thumb:

[John]

the hoses thread and this should have polls imo! lol

[Andy]

I don't understandlol


It seems to be choice, as the lad in total vauxhall, recons he put 20 boxes in his 280bhp let astra.

He obviously cant drive properly

[napalm_27]

He obviously cant drive properly


im going for the f28 as knowing me my lead foot will play a big part of my driving lol

[MattBrown]

the hoses thread and this should have polls imo! lol

lol


What does eveyone recon?

As i cant see having 190mph flat out any use, above 155 in a nova and I find it enoughlol

when the mirrors are flapping, the bonnet is flapping, the windscreen is shakin, and were both screaminglol

[MattBrown]

He obviously cant drive properly

Thankyou for the useful reply:tard:

[napalm_27]

lol


What does eveyone recon?

As i cant see having 190mph flat out any use, above 155 in a nova and I find it enoughlol

when the mirrors are flapping, the bonnet is flapping, the windscreen is shakin, and were both screaminglol

wtf are you driving :confused::wtf:

[MattBrown]

wtf are you driving :confused::wtf:

I worked it out I think.

16" wheels, f28 ratio off the net, came out to 191mph or something, with a 7200 limiterlol

Seems very high to me

[napalm_27]

I worked it out I think.

16" wheels, f28 ratio off the net, came out to 191mph or something, with a 7200 limiterlol

Seems very high to me

considering paul struggled to get near 170mph after hitting 150mph+ i very much doubt one will hit 190mph
il be sure to let you know tho if mine does :thumb:

[John]

I worked it out I think.

16" wheels, f28 ratio off the net, came out to 191mph or something, with a 7200 limiterlol

Seems very high to me

Matt, i went to bruntingthorpe a couple of years back, rich metcalfs well specced let on an f28, ran 159.9mph flat out iirc. All measured with gps. he ran 195 45 15's iirc.

There's no way you'll see over 165mph imo! (all on private roads of course)

[John]

http://i6.photobucket.com/albums/y221/ricmetcalf/DSC00105.jpg

[MattBrown]

Matt, i went to bruntingthorpe a couple of years back, rich metcalfs well specced let on an f28, ran 159.9mph flat out iirc. All measured with gps. he ran 195 45 15's iirc.

There's no way you'll see over 165mph imo! (all on private roads of course)

I also agree with you john.

Obvcourse, on my aunties private runway:roll:

Erm, must have made a mistake calculating lol

[Lee H]

F20 will die if car is driven properly. I've broken 2 on standard XE's.

No need for internal shifter, just needs the linkage modifying.

[MattBrown]

F20 will die if car is driven properly. I've broken 2 on standard XE's.

No need for internal shifter, just needs the linkage modifying.

Ahh, ok bud.

How hard was it to do the mount?

And linkage?

[Lee H]

Mount was done by Chris Astley when he welded the new inner wings in.

Linkage needs shortening where it attaches to the box (rather than lengthening like you do on an F20 by turning the white bush round)

[MattBrown]

Mount was done by Chris Astley when he welded the new inner wings in.

Linkage needs shortening where it attaches to the box (rather than lengthening like you do on an F20 by turning the white bush round)

Ohh:(

Grinder, and welder affair?

[Lee H]

Yes, needs cutting and welding shorter.

[General Baxter]

F20 will die if car is driven properly. I've broken 2 on standard XE's.

lol i broke one in 30miles :thumb:

[Sloth]

thats generally how you shorten a metal part....

if it was me, i'd fit the f28 after new synchro rings and a full check and rebuild.

[MattBrown]

thats generally how you shorten a metal part....

if it was me, i'd fit the f28 after new synchro rings and a full check and rebuild.

If it works in the cav, it will work in the novalol

And to lengthen the linkage, do you cut it? Or turn the plastic part? TIT

I dont know alot about the 6 speed setup:cool:

[General Baxter]

have you even checked on insurance on this 'beast' with your convictions lol

[MattBrown]

have you even checked on insurance on this 'beast' with your convictions lol

Yes, its a 1.0lol
















































Im joking btwlol

[Nova_Tek]

The only way you'll know whether it'll last or not is to try it mate. There are so many variables with these things, previous milage, previous owner and servicing, how the last owner drove the car etc. Some'll be good some'll be half dead.

I'm sticking in an F20 first, 75k miles done mean't to be solid. I know there's a risk, but I wanna actually try it for myself. If it blows then I'll swap it for an F28 (hopefully by then David Dixon will have made a custom F28 mount for the original Nova gearbox mount :d).

[MattBrown]

The only way you'll know whether it'll last or not is to try it mate. There are so many variables with these things, previous milage, previous owner and servicing, how the last owner drove the car etc. Some'll be good some'll be half dead.

I'm sticking in an F20 first, 75k miles done mean't to be solid. I know there's a risk, but I wanna actually try it for myself. If it blows then I'll swap it for an F28 (hopefully by then David Dixon will have made a custom F28 mount for the original Nova gearbox mount :d).

Im also waiting for his mountlol

I want 6 gears though, that would be so cool in a nova lol

[Graeme]

As I said the other day just fit the f28 and consider it part of the conversion, I have all the pictures you need here

[Lee H]

If it blows then I'll swap it for an F28 (hopefully by then David Dixon will have made a custom F28 mount for the original Nova gearbox mount :d).

Thats impossible to do as the original Nova chassis leg mount is in the way of the F28 as the box is so much bigger.

[General Baxter]

we looked into that, its in the thread

[Graeme]

Doesn't Joff's run the factory mount?

[Nova_Tek]

Im also waiting for his mountlol

I want 6 gears though, that would be so cool in a nova lol

Yep mate 6 gears would be uber cool especially seeing as I've never even had a 5th with my Nova lol lol


Thats impossible to do as the original Nova chassis leg mount is in the way of the F28 as the box is so much bigger.

^ I'll let David sort that one out lol

[Nova_Tek]

Doesn't Joff's run the factory mount?

We thought we did IIRC Benn put up a pic but the mount was moved forward a bit and then welded. Original mount and shape moved forward.

[General Baxter]

^ I'll let David sort that one out lol

wont work, as the gearbox casing, is right in the way of the orginal mount lol

[Nova_Tek]

^ I know but he said he'll try :)

[Lee H]

^ I know but he said he'll try :)

The rear part of the standard shell mount has to be cut off at the very least to even get the box in the engine bay so it is going to involve some welding to make a new chassis mount whatever is done.

[MattBrown]

As I said the other day just fit the f28 and consider it part of the conversion, I have all the pictures you need here

Naked graeme, with a 9"

























Grinder?lol

[Benn]

Mines on a F20 at the mo. But i have a F28, i have been told tho you can still use a flat flywheel. Cant remember what bits of the F20 and F28 cluth you use tho off hand.


Never heard you need to mod the rear mount....

[Nova_Tek]

You had any problems with the F20 Benn?

[MattBrown]

Mines on a F20 at the mo. But i have a F28, i have been told tho you can still use a flat flywheel. Cant remember what bits of the F20 and F28 cluth you use tho off hand.


Never heard you need to mod the rear mount....

Yup, have to drill and tap the rear mount:thumb:

[Benn]

Oh i know that, but Lee was only about on the body/chassis.

[Nova_Tek]

That was for the N/S mount dude.

[Lee H]

Problem with using the flat flywheel is you have to use the XE cover plate for the clutch which isn't going to take phase 2 for long without slipping. The Turbo cover plate is stronger but will only fit the pot flywheel.

[MattBrown]

Problem with using the flat flywheel is you have to use the XE cover plate for the clutch which isn't going to take phase 2 for long without slipping. The Turbo cover plate is stronger but will only fit the pot flywheel.

Am i having the more robust setup off you lee?

CBA pulling it in and out lol

[Lee H]

I have a flywheel and a used F28 friction plate but no cover plate. Mr Dixon had that when I bought the Helix clucth.

[alan b]

F20 will die if car is driven properly.



my f16 is still going. gripper diff, 888's, running 17 psi now on a std kkk so whatever power that is (300 maybe?). use it for drag racing mainly so gets flat out 1st and 2nd, and its still fine. that said ive ate f20's too.
have never blown an f16.

[Nova_Tek]

So all this F20x10 to get torque figure rate for the box is a bt unrelaible. Just sounds like some F20's have had a hard life and were knackered to start with.

F16 must be crazy acceleration in 1st and 2nd.

[Stuart]

So all this F20x10 to get torque figure rate for the box is a bt unrelaible. Just sounds like some F20's have had a hard life and were knackered to start with.

F16 must be crazy acceleration in 1st and 2nd.

F number being NM torque/10 is a load of old toss imho.

Just look at the F10 and F13.... aside from some ratios(and the 4/5spd), they are identicle inside, how the hell is that 30NM more torque capacity!!!!

and the F23 is just stupidly bombproof, many folks in the States running 500NM through them lol.

Its all about how you treat them

[MattBrown]

F number being NM torque/10 is a load of old toss imho.

Just look at the F10 and F13.... aside from some ratios(and the 4/5spd), they are identicle inside, how the hell is that 30NM more torque capacity!!!!

and the F23 is just stupidly bombproof, many folks in the States running 500NM through them lol.

Its all about how you treat them



Hmm, I just want 6 gears now.

at 70mph, sat on motorways etc, what sort of revs is the engine doing? Just off boost? Or is it always sat in boost:confused:

[Stuart]

depends on the boost controller, tyre sizes etc.

tbh I dont really care about old ancient gearboxes :p

[Nova_Tek]

If it's motorway cruise economy you want then the F20 3.55 or the 3.42 Final drive. They have a longer 5th gear and will easily be under 3k at 70mph. (I'm hoping the one I got is one of those. IIRC It's off a Astra Mk3 so they tend to have the 3.55)

[Stuart]

or fit the 5th pair from a WR F18


oh but thats not 6spd for spec list whoring...

[Nova_Tek]

F number being NM torque/10 is a load of old toss imho.

Just look at the F10 and F13.... aside from some ratios(and the 4/5spd), they are identicle inside, how the hell is that 30NM more torque capacity!!!!

and the F23 is just stupidly bombproof, many folks in the States running 500NM through them lol.

Its all about how you treat them

That's what I mean, it all sounds a bit stupid.(oh and I thought it was 10 x 10 or 13 x 10. But t never made sense anyway)

Like I mentioned beofre and like you've said, all about luck, it's state when you got it and how tha last owner treated it.

[Lee H]

Hmm, I just want 6 gears now.

at 70mph, sat on motorways etc, what sort of revs is the engine doing? Just off boost? Or is it always sat in boost:confused:

With all the F20's I've had it's at about 4k rpm at 80, F28 is about 2.5k rpm at 80.

[Stuart]

That's what I mean, it all sounds a bit stupid.(oh and I thought it was 10 x 10 or 13 x 10. But t never made sense anyway)

Like I mentioned beofre and like you've said, all about luck, it's state when you got it and how tha last owner treated it.


apparently 100Nm/10 = F10 :p
and apparently 130NM/10 = F13 :p

Well, allegedly, but the internals are the same if you get a pair of 5spds next to each other lol

[MattBrown]

With all the F20's I've had it's at about 4k rpm at 80, F28 is about 2.5k rpm at 80.

Cheers mate, 2.5k, am I correct in assuming that this is out of boost?

As trips to car shows, tracks, racing etc are all motorwaylol

[Sloth]

apparently the autograss lads run xe's on f13/5 cr's and swear by them.
just to add, whats the f20 on the list that gives a 180 mph top speed? f20wr5 rings a bell?

[Lee H]

Cheers mate, 2.5k, am I correct in assuming that this is out of boost?

As trips to car shows, tracks, racing etc are all motorwaylol

Depends on a few things like intercooler size etc but mine is just about on boost at 2.5k. Ideal as can easily overtake people without changing out of 6th on the motorway.

[bazil]

Lee what actually broke in your boxes? Did you find out or just replace them?

[Lee H]

Snapped the input shaft on one and lost 5th on another. 5th is also whining a little on my XE Corsa now as well.

[alan b]

f20 snapped input shaft. have done this on 2 f20's.
http://i1.bebo.com/049b/13/large/2009/11/21/10/414601182a11883387198l.jpg

why are u worrieng about fuel consumption? its gone be a 2 litre turbo nova like not a diesel. gearbox choice should be decided by what suits your driving style and power output not by how much petrol itll cost you, cos trust me therell b alot more than just petrol costs to drain your money.

if you drive it easy itl b grand like. novas are light it wont take much pedal to keep her moving along at 80. if fuel economy is your biggest problem trust me youll be lucky!lollol

[Graeme]

I say for a true test let Lee have a few running down York strip or Riggy have a few runs down the 627 chasing S3's, lol, if it survives that it should be strong enough

[MattBrown]

I say for a true test let Lee have a few running down York strip or Riggy have a few runs down the 627 chasing S3's, lol, if it survives that it should be strong enough

If people are insured, and sensible (NOT RIGGY) they can drive it.

Lee can have a go anytime, as if he stacks it, I get a shiny black turbo GSIlol

Graeme feel free bud, no point letting riggy drive it, he is to forceful on the controls, thinks he is in the indy 500 when he is really just going to the shopslol

[Adam]

Rickardo had 240bhp, but never leathered it in 1st or 2nd:thumb:

1st and 2nd gear wont break gearboxes as it'll just light the wheels up. You need grip to break something as thats when the engines torque is putting everything under the most strain.

[Nova_Tek]

So ditch finders FTW :thumb: lol

[Stuart]

yep a 3rd-5th breakage is most likely

[blue_peg_16v]

mine has been fine as john said, and it take alot of abuse boost is adjustable upto 17psi tbf id rather replace a gearbox for £40 than £300 when i have no idea of condition would be gutted to bolt the f28 in and find it was fecked f20 not as bothered another would only be £40

[MattBrown]

mine has been fine as john said, and it take alot of abuse boost is adjustable upto 17psi tbf id rather replace a gearbox for £40 than £300 when i have no idea of condition would be gutted to bolt the f28 in and find it was fecked f20 not as bothered another would only be £40

If i was to hand over £300, I would have to see it first, and take the covers off for a butchers.

Theres always that question, "If its fine, why has he removed it"

[Stuart]

Matt, just make one from scratch, you must know how as you are a god of course :roll:

[Sloth]

lolz, as an aside, a mates f20 started whining in 5th like a ho last week, took the diff plate off, cleaned the **** out, and refilled with 2l of fresh oil, now its fine. vaux raccomend 1.7l, i wonder if the extra 0.3l means the 5th gets more oil fed to it?

[Stuart]

I always overfill GM gearboxes and then let them breathe to the level they want to be at, seems to work much better than the lies they tell

[Jon_nova1]

I did that....my sister got a nice pool of fluid on her driveway after the car went 50 miles to her house lol

[Stuart]

I did that....my sister got a nice pool of fluid on her driveway after the car went 50 miles to her house lol

catch tank/long pipe ftw lol

[Adam]

I just lob 2L of box oil in because i cant be bothered seeing a 1/3rd of a bottle left to sit around for X months/years lol

[MattBrown]

Matt, just make one from scratch, you must know how as you are a god of course :roll:

I often preach this.

[John]

I just lob 2L of box oil in because i cant be bothered seeing a 1/3rd of a bottle left to sit around for X months/years lol

pmsl!lol