Greetings chaps!
Currently building up a turbo'd M10 1.8 for my current E21 but might be obtaining an earlier vehicle for parts which happens to have a 4-speed box
My question is.....which is stronger? standard M10 4-speed or overdrive 5-speed?
Dont fancy blowing up my 5-speed as it might take awhile to find another
Cheers
Steve
M10 Gearbox Strength - 4 or 5 Speed????
- sleeperviva
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M10 Gearbox Strength - 4 or 5 Speed????
'83 BMW E21 316 aka The Daily (poss going M10 turbo)
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also
- e21-Mark
- E21 Master
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Re: M10 Gearbox Strength - 4 or 5 Speed????
I've always been led to believe 4 speed is stronger but have never blown either as the diffs gave way first.
Re: M10 Gearbox Strength - 4 or 5 Speed????
I believe a 5 speed overdrive box is nothing but a 4 speed box with an overdrive housing bolted to it. So I reckon there's no difference in strenght.
1979 320i Antrazitgrau US spec
- sleeperviva
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- Joined: Sun Jul 15, 2012 3:37 pm
Re: M10 Gearbox Strength - 4 or 5 Speed????
Thanks for your replys gents!
Looks like I will just go with the 5speed for now
Looks like I will just go with the 5speed for now
'83 BMW E21 316 aka The Daily (poss going M10 turbo)
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also
Re: M10 Gearbox Strength - 4 or 5 Speed????
Has anyone had any more experience of M10 Turbos and the 245 overdrive? A place near me said the limit is 200ft-lb torque, but I'm sure I've heard of them standing more.
Did the 5 speed hold up well for you? and at what Bhp/torque level?
Did the 5 speed hold up well for you? and at what Bhp/torque level?
Re: M10 Gearbox Strength - 4 or 5 Speed????
Probably the clutch is the weakest link. If you do not beef up that too much, it will protect the gearbox.
I have a NOS clutch with an E30 five speed overdrive gearbox. With my M10 I put about 160hp through it.
I have a NOS clutch with an E30 five speed overdrive gearbox. With my M10 I put about 160hp through it.
- sleeperviva
- Newbee
- Posts: 8
- Joined: Sun Jul 15, 2012 3:37 pm
Re: M10 Gearbox Strength - 4 or 5 Speed????
10yrs ago
Car never received its lovely, well assembled M10 turbo engine as I got bored with the car and flogged the lot!
Sorry guys I have nothing else to add
Car never received its lovely, well assembled M10 turbo engine as I got bored with the car and flogged the lot!
Sorry guys I have nothing else to add
'83 BMW E21 316 aka The Daily (poss going M10 turbo)
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also
'74 Vauxhall Viva Twin-Cam
'91 Ford Thunderbird 3.8SC
Other assorted rubbish also