i have been looking for a tall ratio first type9 box or gear kit and a friend of a friend has a box with a quaife close ratio clubman gear kit in it
and has little use.
all the ratios are all better for my car as 1st,2nd,3rd are higher and 5th lower than my std box. i know S/C boxes are quiet noisey but im not sure
how loud this exact box would be in a light 7rep with no screen and a loud exhaust.
im also thinkig it would be a better option as im already running 165bhp
most of the time i drive with a motorcycle helmet or have earplugs in as it gets a bit windy so im thinking i shoud be ok?
anyone have any experince of a type9 with s/c gears
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Building: stainless steel chassis, 2l black top turbo zetec
posted on 20/11/13 at 11:17 PM
Have been running 320HP on a type 9 for 4 years, have done numerous track days and launches at santapod.
I can only put it down to the tyres breaking traction rather than the box.
we've all heard how noisy they are as almost all cars have straight cut reverse, just think of that whining away for hours...what a total
pita
my tech teacher at school ran a classic mini rally car to school it too had straight cut gears and was horrendously loud. I think most people will
think your car is knackered
quote:Originally posted by madteg
Have been running 320HP on a type 9 for 4 years, have done numerous track days and launches at santapod.
I can only put it down to the tyres breaking traction rather than the box.
I've got a straight cut quaife. It's loud but not awful. I often drive wearing in-ear ear defenders and it's not obtrusive then.
Some of the noise gets through but it's more a signal of what the car is doing.
When the box is cold it takes a little effort to make the changes but once warm it's like a knife though hot butter.
Those that know what they're hearing as you drive past will nod knowingly.
When all you have is a hammer, everything around you is a nail.
It seems to depend more on which gearbox, mini's are particularly noisey with a sc box. The vid above is also extremely noisey..
I have a tranx straight cut kit in my type 9, and i don't mind the noise it makes. Used on the road, a bit of track day, rwyb (with nitrous) etc
and it's been in for many years now;-
I can testify to how loud minis are with a straight cut box and drop gears. You could hear my car two miles away round here! I needed ear plugs to
drive to work. It was only 5 miles.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
Back in the late 80's when I first built my original Caterham the only way to get close ratio gears was to locate a genuine Ford helical Rocket
box from an X Pack RS2000 Escort homologation special (only ever seen 2 in 35 years) or use a Quaiffe or Tran-X strait cut box.
My first Quaiffe box an Escort Sport 4 speed one, slightly noisy in the first 3 gears but quiet as a mouse in top, unfortunately they were a bit
fragile (rated at 150 bhp) and when I moved to slicks was advised to swap boxes. My next box was a 4 speed Quaiffe pro, very noisy in the first 3
gears and still moaned like an unpaid prostitute in top, once I stopped using the car on the track its days were numbered.
Since 1999 I have been using a BGH helical cut close ratio box. The first 2 broke but BGH replaced them under warranty, the third was has been fine.
The ratios are spot on and its quiet. If I was spending now I would get a SP Components Tracsport Type 9 rocket ratio helical gearbox
http://www.spcomponents.co.uk/gpage.html. The ratios actually look better and the spec of the box is much higher than the similarly priced top line
BGH box, the SPC box uses all new internals whereas BGH use old syncros and some old gears.
quote:Originally posted by beaver34
i run a semi helical gearset from spc in my type 9, strength of straight cut with alot less noise.
also ratios are great, long 1st perfect for our light cars
[Edited on 21/11/13 by beaver34]
When I was last at SPC picking a mates diff up about 3 years ago Steve showed me the new Rocket Ratio helical cut kit he was just starting to sell,
very tempted I can tell you. I am sure he said it was replacing the Semi-helical kit he had been selling up to that time. He demonstrated how it was
actually stronger due to the angle of the teeth and it also had needle rollers on 1st and 2nd thus could take more power/torque and revs than the
semi-helical box. The choice of 5th gear ratios for either road or track was nearly the final nail in my cheque book but I managed to resist, but only
just.
One day perhaps when my BGH dies again (sure BGH will not replace it a 4th time - its 5 years now since my last freebie).
He was flying, did everyone else forget they were allowed a turbo or something??
