Sequential gear box for Cerbera
Discussion
I wonder if anyone knows if this box will fit into a Cerbera.
Currently have the T5 with Quaif CR gears, the reason I ask is, I realy need a sixth gear as the CR box knocks the top speed off by 20-30 MPh. The chap at competition transmission reacons it would work, but might need an adapter plate, and possibly a change of yoke on the propshaft.
http://www.quaife.co.uk:80/Quaife-6-speed-heavy-du...
Thanks.
Just reading through the details, does this box have a reverse?
Currently have the T5 with Quaif CR gears, the reason I ask is, I realy need a sixth gear as the CR box knocks the top speed off by 20-30 MPh. The chap at competition transmission reacons it would work, but might need an adapter plate, and possibly a change of yoke on the propshaft.
http://www.quaife.co.uk:80/Quaife-6-speed-heavy-du...
Thanks.
Just reading through the details, does this box have a reverse?
Edited by Nickccc on Wednesday 9th July 20:38
Hey Nick,
I am pretty sure that's a reverse gear shown in the rendered CAD image (left side bottom -of the box, not of the image)
How much torque/power are you planning to produce? Quaife actually rate this for 400 lb/ft and 450 bhp (see below). But they state that this product was designed to replace “the original Ford Sierra Type 9 gearbox used in Caterhams, Escorts, Ginettas and Westfields, as well as a wide variety of specialist cars.” Most of the cars they name are a couple of hundred Lbs lighter than yours. This may affect longevity.
Most importantly, what are the gear ratios in your T5? I think the road racing version of the T5 uses 2.87, 1.89,1.28, a 1.00:1 fourth and a .82 fifth. Quaife offer a .888. You would actually see a reduction in top speed using the Quaife box and you’d still have to replace the final drive for an increase in top speed.
Yours is a reasonably light weight car with a good power output (not counting any performance enhancements you may have incorporated) so going to a six-speed box may not provide any kind of gain in acceleration.
You may want to ask someone who is already using a six speed sequential gearbox if they feel that there is much of a speed advantage over shifting through five on a conventional pattern.
In addition, if your current gearbox has helical gears, expect an increase in noise as Quaife surely reach their rating using the stronger straight cut gears. Interestingly, they don't publish the ratio for reverse.
IMHO £5,124.25 (not incl. VAT) might be better spent on engine development and lightening of body and accessories.
nice car!
Bernard.
I am pretty sure that's a reverse gear shown in the rendered CAD image (left side bottom -of the box, not of the image)
How much torque/power are you planning to produce? Quaife actually rate this for 400 lb/ft and 450 bhp (see below). But they state that this product was designed to replace “the original Ford Sierra Type 9 gearbox used in Caterhams, Escorts, Ginettas and Westfields, as well as a wide variety of specialist cars.” Most of the cars they name are a couple of hundred Lbs lighter than yours. This may affect longevity.
Most importantly, what are the gear ratios in your T5? I think the road racing version of the T5 uses 2.87, 1.89,1.28, a 1.00:1 fourth and a .82 fifth. Quaife offer a .888. You would actually see a reduction in top speed using the Quaife box and you’d still have to replace the final drive for an increase in top speed.
Yours is a reasonably light weight car with a good power output (not counting any performance enhancements you may have incorporated) so going to a six-speed box may not provide any kind of gain in acceleration.
You may want to ask someone who is already using a six speed sequential gearbox if they feel that there is much of a speed advantage over shifting through five on a conventional pattern.
In addition, if your current gearbox has helical gears, expect an increase in noise as Quaife surely reach their rating using the stronger straight cut gears. Interestingly, they don't publish the ratio for reverse.
IMHO £5,124.25 (not incl. VAT) might be better spent on engine development and lightening of body and accessories.
Quaife said:
Designed for rear wheel drive applications capable of handling up to a maximum of 400 lb/ft and 450 bhp, the QBE60G offers ultra-rapid and smooth gearshifts, allied to superior strength and reliability, and even features paddle shift compatibility.
The QBE60G has a front face which is designed to mate directly to an existing Ford Type 9 bellhousing, using the original four or optional six bolt fitment and acts as a direct drop-in replacement for the original Ford Sierra Type 9 gearbox used in Caterhams, Escorts, Ginettas and Westfields, as well as a wide variety of specialist cars.
QBE60G customers can specify long and short input shaft options QBE60G according to customer preference and three ratios sets are available, in either straight cut or helical tooth forms.
Current ratio options are:-
1st 2.400 2.400 2.769
2nd 1.840 1.694 2.057
3rd 1.482 1.333 1.578
4th 1.260 1.150 1.260
5th 1.104 1.000 1.104
6th 1.000 0.888 1.000
By the way, The QBE60G has a front face which is designed to mate directly to an existing Ford Type 9 bellhousing, using the original four or optional six bolt fitment and acts as a direct drop-in replacement for the original Ford Sierra Type 9 gearbox used in Caterhams, Escorts, Ginettas and Westfields, as well as a wide variety of specialist cars.
QBE60G customers can specify long and short input shaft options QBE60G according to customer preference and three ratios sets are available, in either straight cut or helical tooth forms.
Current ratio options are:-
1st 2.400 2.400 2.769
2nd 1.840 1.694 2.057
3rd 1.482 1.333 1.578
4th 1.260 1.150 1.260
5th 1.104 1.000 1.104
6th 1.000 0.888 1.000
nice car!
Bernard.
How about one of these?
http://www.eliteracingtransmissions.com/?p=gearbox...
400ft/lb rating about £4600 with drop gears so easy ratio swaps
Matt
http://www.eliteracingtransmissions.com/?p=gearbox...
400ft/lb rating about £4600 with drop gears so easy ratio swaps
Matt
Thanks for the replies,
Mat, I phoned Elite the otherday and have some drawings, I'm off to Jules next week so will run it past him.
Slow Mo, thanks, makes a lot of sense, have been considering these,
forgot, these are the ratios in the T5
Close ratio kit gearing:
1st: 2.527:1
2nd: 1.675:1
3rd: 1.259:1
4th: 1:1
5th: 0.87:1
First is good for 63, with second taking you to 95, third 127, fourth 160, and fith 184.
this is reving right out to 7500.
The ratio kit is excelent,but I want a sixth gear for crusing,as you are at 3000rpm at 70 in top. A sequential box with these ratios and a sixth with 0.8 or lower would be perfect.
Oh, forgot again, car is making 440 and 375lb/ft, and yes the Quaife kit, does us semi helical gears, the increase in noise isn't too bad. I hear what your saying regards gear changes, the uprated T5 has a far slicker action, though with the sequential you wouldn't need to use the clutch, it must be a bit faster shifting than going across the gate on a H patern.
Mat, I phoned Elite the otherday and have some drawings, I'm off to Jules next week so will run it past him.
Slow Mo, thanks, makes a lot of sense, have been considering these,
forgot, these are the ratios in the T5
Close ratio kit gearing:
1st: 2.527:1
2nd: 1.675:1
3rd: 1.259:1
4th: 1:1
5th: 0.87:1
First is good for 63, with second taking you to 95, third 127, fourth 160, and fith 184.
this is reving right out to 7500.
The ratio kit is excelent,but I want a sixth gear for crusing,as you are at 3000rpm at 70 in top. A sequential box with these ratios and a sixth with 0.8 or lower would be perfect.
Oh, forgot again, car is making 440 and 375lb/ft, and yes the Quaife kit, does us semi helical gears, the increase in noise isn't too bad. I hear what your saying regards gear changes, the uprated T5 has a far slicker action, though with the sequential you wouldn't need to use the clutch, it must be a bit faster shifting than going across the gate on a H patern.
Edited by Nickccc on Monday 14th July 19:35
Edited by Nickccc on Monday 14th July 19:45
WE have used the Elite box for three years in our racing MGZT.The engine is a full race 32 valve Mustang making 540hp at 7500rpm and 446lbs at 4700rpm. If it can cope with racing our car it can cope with the TVR. The drop gears are very useful as you can fine tune to suit your needs.
but isn't the speedo driven off a sensor at the side of the diff on a cerb?I'd be interested to hear what they think about sticking the AJP's firing order into that gear box as well.
I've always had an worry that the torsioanl vibration from the AJP does the gearbox no good at all. All the stories of gearbox failure, including my own, on engines that aren't aren't as torquey as some V8 Rover engines out there. I know the car is a little heavier but is that enough to increase the failure rate so?
I've always had an worry that the torsioanl vibration from the AJP does the gearbox no good at all. All the stories of gearbox failure, including my own, on engines that aren't aren't as torquey as some V8 Rover engines out there. I know the car is a little heavier but is that enough to increase the failure rate so?
Slow M said:
fredtonge said:
Hi guys PROMASTER gear box designed for TVR,S
As used in the GTF 600R Behind a ls with 500 hp
Why is an ls only making 500HP? As used in the GTF 600R Behind a ls with 500 hp
B
Sounds harsh, it wasn't intended as a cutting remark; rather, it was a question regarding what class it is built for or if this is for a race or street version.
B.
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