Just On Tickover
Posted 29 June 2019 - 07:16 PM
Hi, i´m having some doubts on my gearbox and need some help.
I have a mini 1000 HLE and i bought a 1275 Mg metro engine to do the swap.
So the MG metro gearbox ( DAM 5626 A/B Z2 ) have a borken gear. And i tought that i could use the mini 998 HLE gearbox (DAM 5626 A/B Z4) in the 1275 engine.
The hle gearbox has a ratio of 2.95 (20 / 59 ) and the Mg metro a 3.44 (18 /62 )
My doubt is, can i use the HLE gearbox on the mg metro engine , changing just the final drive ?
Thanks for the help.
Moved Into The Garage
Posted 29 June 2019 - 08:14 PM
Yes, you can use the Gearbox from your HLE on your 1275 engine.
You can also swap the final drive too from the 2.95 to the 3.44.
Final Drive Ratios are something you'll get mixed answers on, but I'm sure most on here will agree that a 2.95 is too tall in a Mini. Personally, I like 3.44 as it makes the car lively enough and still gives quite acceptable speed.
Just On Tickover
Posted 29 June 2019 - 09:08 PM
Yes, you can use the Gearbox from your HLE on your 1275 engine.
You can also swap the final drive too from the 2.95 to the 3.44.
Final Drive Ratios are something you'll get mixed answers on, but I'm sure most on here will agree that a 2.95 is too tall in a Mini. Personally, I like 3.44 as it makes the car lively enough and still gives quite acceptable speed.
Also i plan to bore to 1310 and use a HIF44, plus a good exhaust system. The car is runing 13" wheels. That is why i plan to change to the 3.44 FD
Uncle Cooperman, Voted Mr TMF 2011
Posted 29 June 2019 - 09:28 PM
The wheel size makes no difference. A 10", 12" and 13" wheel have virtually identical rolling radii within about 3%.
With 13" wheels the wide tyres increase the frontal area so the additional drag will reduce the maximum speed as will the wide wheel arch extensions. That is in addition to the other disadvantages of 13" wheels.
As Chris says, a 3.44:1 is an ideal diff ratio for most road Minis with standard gear ratios.
One Carb Or Two?
Posted 29 June 2019 - 09:29 PM
Yes, you can use the Gearbox from your HLE on your 1275 engine.
You can also swap the final drive too from the 2.95 to the 3.44.
Final Drive Ratios are something you'll get mixed answers on, but I'm sure most on here will agree that a 2.95 is too tall in a Mini. Personally, I like 3.44 as it makes the car lively enough and still gives quite acceptable speed.
I would only go for 3.1 N/A max, and 2.95 for turbo/supercharged. :/
Just On Tickover
Posted 30 June 2019 - 07:59 AM
Also the clutch is diferent on them. The HLE as a Verto Clutch, while the mg metro engine as a Pre-Verto. Can i use the HLE clutch on the 1275 mg ?
Moved Into The Garage
Posted 30 June 2019 - 08:06 AM
Also the clutch is diferent on them. The HLE as a Verto Clutch, while the mg metro engine as a Pre-Verto. Can i use the HLE clutch on the 1275 mg ?
Yes, but I would recommend replacing the consumable parts of it.
Up Into Fourth
Posted 30 June 2019 - 08:12 PM
Does the HLE box use the super-wide ratio gearset with the 2.95 diff?
Could be worth checking what effect this might have on gearing in first, second, and third before deciding on diff ratio.
Just On Tickover
Posted 30 June 2019 - 10:27 PM
Does the HLE box use the super-wide ratio gearset with the 2.95 diff?
Could be worth checking what effect this might have on gearing in first, second, and third before deciding on diff ratio.
What you mean by super wide ratio ? long gears ?
And how can i check that ?
One Carb Or Two?
Posted 01 July 2019 - 08:20 AM
Why would a 998 hle mini have a gearbox with a final drive ratio of 2.95 ????????
Uncle Cooperman, Voted Mr TMF 2011
Posted 01 July 2019 - 11:47 AM
Why would a 998 hle mini have a gearbox with a final drive ratio of 2.95 ????????
So that 'little old ladies' can drive around very economically with it being nice-and-quiet, but with no need of good acceleration. The target market had changed by the time the 998 HLE was being sold and was no longer the younger person, rather the middle-aged and older who were not interested in any sort of performance.
One Carb Or Two?
Posted 01 July 2019 - 01:18 PM
Are you saying this came out of longbridge with this diff ????
It must be gutless in forth gear.
Edited by pete l, 01 July 2019 - 01:19 PM.
Camshaft & Stage Two Head
Posted 01 July 2019 - 02:31 PM
Standard 998 will be gutless in every gear lolAre you saying this came out of longbridge with this diff ????
It must be gutless in forth gear.
Super Mini Mad
Posted 01 July 2019 - 10:05 PM
I think the clutch type on the MG depends on the Year. Some if not all were cable operated.
Up Into Fourth
Posted 04 July 2019 - 06:29 PM
Does the HLE box use the super-wide ratio gearset with the 2.95 diff?
Could be worth checking what effect this might have on gearing in first, second, and third before deciding on diff ratio.
What you mean by super wide ratio ? long gears ?
And how can i check that ?
Here are the ratios used on A+ in Metros (taken from Austin Rover tech info):
Metro (and other A+?) wide: 1.00; 1.425; 2.185; 3.647 (single groove on gears)
Metro 'super-wide' (HLE): 1.00; 1.435; 2.307; 4.004 (two grooves on gears)
Super-wide gears were typically used with high diff to get fuel best economy, but needed wider gears to allow hill starts etc.
No idea which minis ued these ratios, as I don't have any cars with gearboxes later than '72.
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