31 replies to this topic

[Dave E]

I need a stronger box and as I can't afford 8K euro for the lovely sequential one I saw today it's looking like an M32.

I've had a good look around and from what I understand

I need;

M32 box
Europa driveshafts
New front mount
Heavy old dual mass flywheel

and need to;

alter the gear cables
alter the gear shifter

Few things I'm still unsure about

what type M32 do I need to go for
is there a lightweight flywheel for this conversion
what clutch do I need.

Anything else I've missed?

Edited by VXT'ED, 25 October 2011 - 05:08 PM.

[The Batman]

i needed a europa side mount and a custom ttv f23 - m32 flywheel duncan vxr will be the guy to speak to for the tubby conversion

[Nev]

I dont believe the M32 is any stronger than the F23 if thats your main reason. My F23 seems to cope fine with 400 ft/lb so far. Maybe the M32 selector forks are sturdier though, not sure on that.

[VX-GT]

I dont believe the M32 is any stronger than the F23 if thats your main reason. My F23 seems to cope fine with 400 ft/lb so far. Maybe the M32 selector forks are sturdier though, not sure on that.

It was published that 23 (F23) equated to 230nm torque but this was latter corrected 230 lbs/ft torque

gears are pressure fit on the F23
gears are spline shaft on the M32

Not many cars can truely utilise 400 lbs/ft (i'm sure slinky will try and correct me)

[Dave E]

I dont believe the M32 is any stronger than the F23 if thats your main reason. My F23 seems to cope fine with 400 ft/lb so far. Maybe the M32 selector forks are sturdier though, not sure on that.

Yep the reason is strength. Just seen on the Seloc TechWiki that it's rated to 236ft/lb so only 6ft/lb more than the F23. I'd be more than happy with uprated internals but can't find anyone that supplies these either.

[slindborg]

I dont believe the M32 is any stronger than the F23 if thats your main reason. My F23 seems to cope fine with 400 ft/lb so far. Maybe the M32 selector forks are sturdier though, not sure on that.

Yep the reason is strength. Just seen on the Seloc TechWiki that it's rated to 236ft/lb so only 6ft/lb more than the F23. I'd be more than happy with uprated internals but can't find anyone that supplies these either.

Somewhere stateside must do something surely? Given the madness they run through their boxes, although at that point the trip to Harlow will seem cheap

Its worth noting that the F 'ratings' (load of bollocks using the number to equate the torque imho based on seeing/using GM boxes for a few minutes) of gearboxes is sustained torque.... thing is nothing is published regarding how long that sustaining is for nor the input shaft speed etc so you maybe able to put 1000000000lbft into it for a couple of minutes or 1lbft for a few thousand years.

Edited by slindborg, 26 October 2011 - 09:52 AM.

[Dave E]

Somewhere stateside must do something surely? Given the madness they run through their boxes, although at that point the trip to Harlow will seem cheap

Good idea, worth a look

[siztenboots]

trust me, I've looked , last thing was a big petition to get GM to admit there was a problem.

[Dave E]

Would cryogenic treatment help gears and syncros?

[siztenboots]

well its not a strength problem, its a heat problem, imho. I've been running last 2 years with no undertrays and will add a dedicated gearbox radiator for next season.

[Dave E]

.....will add a dedicated gearbox radiator for next season.

Is this off the shelf or bespoke?

[Nev]

I also run without an undertray as a general precation. Like Steve, I might also add a gearbox oil cooler too as I have already moved the air box in anticipation of this.

[Duncan VXR]

Gearbox cooler is just taking drain plug connection to pump through rad and return to either the top or side other plugs ;-) extra fluid levels will help also. Tbh my m32 box got abused and had no issues at all ;-)

[Duncan VXR]

What effect is no under tray having on flow of air?

[alanoo]

well its not a strength problem, its a heat problem, imho. I've been running last 2 years with no undertrays and will add a dedicated gearbox radiator for next season.

We monitored 170 °C of gb oil temperature on a track car recently, on a really well vented one (no boot + rear cutouts added) !

[siztenboots]

the M32 has I understand it a nylon 6th gear in GM versions. The Fiat/Alfa have a steel 6th gear afaik in the Grande punto, Brera,159 and Croma II

service parts and bearings (http://www.noc.ua/pd...catbvemb-en.pdf) , page 135

f23 selector forks and the plastic fingers

[VX-GT]

I run the F23 with 2.5-3 litres of oil (reccomended is 1.75) 3 litres takes it flush with the driveshaft housing seal stops the 4.17 diff whining I will be fitting a cooler with an electric pump controlled by thermostat switch But I am not sure of ideal operating temp

Edited by atom x, 26 October 2011 - 01:55 PM.

[vocky]

M32 box - Astra VXR (for the vxT)
Europa driveshafts - lotus dealer
New front mount - No, use the vx220 front mount
Passenger gearbox Mount and astra adaptor (usually comes on the vxr box, but only £25)
Rear gearbox mount
Heavy old dual mass flywheel

alter the gear cables - only slightly adjust one
alter the gear shifter - reverse gate required

is there a lightweight flywheel for this conversion - yes
what clutch do I need - standard vxr or Helix

Anything else I've missed? - lengthen reversing light switch wiring loom, modify clutch pipe

Edited by vocky, 26 October 2011 - 03:28 PM.

[vocky]

the M32 has I understand it a nylon 6th gear in GM versions.

No it doesn't, it's steel

[siztenboots]

the M32 has I understand it a nylon 6th gear in GM versions.

No it doesn't, it's steel

I know (http://www.abbeytran...-parts-26-c.asp) have listed 6th gear parts

and (http://www.m32gearbo...chro-parts.html) do all the syncros