TVR V8

Qb90 · Oct 10, 2015

hi all I have got my hands on a tvr chimaera 4.3 big valve v8
I am toying with putting it in my 90, yes I know its a bit over the top but
now its sitting in the workshop I cant get the idea out of my head.
which gearbox do you reckon is the strongest readily available manual

fanatic · Oct 10, 2015

Lt85, but you may break it

fanatic · Oct 10, 2015

I've 261hp in mine, auto may be better

Qb90 · Oct 10, 2015

yeah I think your right on the auto but not sure I want an auto 90

fanatic · Oct 10, 2015

Qb90 said:
yeah I think your right on the auto but not sure I want an auto 90

I've 1uzfe stuffed in mine on an auto

discool · Oct 11, 2015

According to my TVR books the engine spec is bhp: 280 @ 5500rpm, Max torque: 305lbs/ft @ 4000rpm, so assuming u are looking at "plug & play" just look for a LR that matches that spec and has a manual gearbox, simples... and the best of luck.

Qb90 · Oct 11, 2015

discool said:
According to my TVR books the engine spec is bhp: 280 @ 5500rpm, Max torque: 305lbs/ft @ 4000rpm, so assuming u are looking at "plug & play" just look for a LR that matches that spec and has a manual gearbox, simples... and the best of luck.

thanks going to get it up and running in the tvr to start with its been left outside with no roof and the ecu is toast thanks to the water which mixed with tvr's brilliant electrics is causing some head aches at the moment it does run but not very well yet

mikeh501 · Oct 13, 2015

a r380 gearbox is rated to approx 280lbft of torque (r380 is named because it can cope with 380nm of torque). If you do fry it, then it will be 3rd gear synchro which goes under heavy acceleration and load. How often will you be nailing it... Also those specs are for the first generation boxes, and if you get one from a late defender Td5 (R380 suffix L) they are stronger as they have uprated bearings and layshaft IIRC. You can also add an oil cooler and larger capacity sump to the R380 which would help.

Id consider one before going the LT85 route as its the R380 is much nicer gearbox day to day.

FYI, ive gone this route on my 4.6 Stage3 megasquirt 90. Not yet built, but should be good for 200+ bhp.

flat · Oct 13, 2015

Ditch the ecu and carb it?

cooltide · Oct 13, 2015

mikeh501 said:
a r380 gearbox is rated to approx 280lbft of torque (r380 is named because it can cope with 380nm of torque). If you do fry it, then it will be 3rd gear synchro which goes under heavy acceleration and load. How often will you be nailing it... Also those specs are for the first generation boxes, and if you get one from a late defender Td5 (R380 suffix L) they are stronger as they have uprated bearings and layshaft IIRC. You can also add an oil cooler and larger capacity sump to the R380 which would help.

Id consider one before going the LT85 route as its the R380 is much nicer gearbox day to day.

FYI, ive gone this route on my 4.6 Stage3 megasquirt 90. Not yet built, but should be good for 200+ bhp.

200+ I like your modesty

Qb90 · Oct 14, 2015

mikeh501 said:
a r380 gearbox is rated to approx 280lbft of torque (r380 is named because it can cope with 380nm of torque). If you do fry it, then it will be 3rd gear synchro which goes under heavy acceleration and load. How often will you be nailing it... Also those specs are for the first generation boxes, and if you get one from a late defender Td5 (R380 suffix L) they are stronger as they have uprated bearings and layshaft IIRC. You can also add an oil cooler and larger capacity sump to the R380 which would help.

Id consider one before going the LT85 route as its the R380 is much nicer gearbox day to day.

FYI, ive gone this route on my 4.6 Stage3 megasquirt 90. Not yet built, but should be good for 200+ bhp.

That's interesting I'm already running an r380 I may try it on that first

mikeh501 · Oct 17, 2015

Qb90 said:
That's interesting I'm already running an r380 I may try it on that first

If the r380 is from a diesel then you will need a v8 bellhousing and a v8 input shaft.

TVR V8

Qb90

Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Qb90

Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

discool

Well-Known Member

Qb90

Member

mikeh501

Active Member

flat

Well-Known Member

cooltide

sheep fancier

Qb90

Member

mikeh501

Active Member

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