DIR Return Create A Forum - Home
---------------------------------------------------------
Old Leafsprung Land Rovers
HTML https://ollr.createaforum.com
---------------------------------------------------------
*****************************************************
DIR Return to: Technical tips & Questions
*****************************************************
#Post#: 98924--------------------------------------------------
V8, LT77 and Series transfer box in a 109???
By: CaptainSlow Date: September 11, 2015, 4:44 am
---------------------------------------------------------
I know I'm going to get shot down in flames, but I'm looking
into various options as the purchase of a 2.5 4 cyl engine seems
to have fallen through. My second option is to fit a carb V8,
LT77 gearbox and the ashcroft adaptor plate to connect these to
the Series transfer box...
Has anyone done this? I'm 90% sure I'll have to use a Stage One
front end to fit it in, but can you foresee any other issues?
Maybe location of the XF box levers after the conversion? If its
a no-go then I'll use an early Disco autobox with the V8 instead
- I might get away with a std front with that???
Thanks as always :)
#Post#: 98925--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: prof-pat-pending Date: September 11, 2015, 5:02 am
---------------------------------------------------------
I think its been done before so it shouldn't be a problem
Gearbox in first and line every thing up from there
Good luck and keep us posted
#Post#: 98926--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: DarrenH Date: September 11, 2015, 6:11 am
---------------------------------------------------------
maybe a slim nose pump with engien driven fan removed, then an
electric "blower" fan between the nose panel and radiator (i.e
blowing through not sucking through) would give you enough room
to keep the series 3 silhouette ??
also i think part of the reason for RR classic, stage 1 and
ninety/one-ten had permenant 4wd was so that it shared engine
torque 4 ways instead of just 2.
i wonder what would happen to series tx box sending torque to
only 2 wheels ? i guess the prop and axle will be super fine as
its Salisbury
#Post#: 98928--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: Doug_T Date: September 11, 2015, 11:08 am
---------------------------------------------------------
Good choice. Yes you will have to do front end work, but it does
mean that you'll be able to change your rear spark plugs and
probably not need to butcher the bulkhead like you would bolting
the V8 to a 4 speed.
Worth remembering that the Stage 1 not only had a flush grille,
but the front crossmember was also moved forward to suit and the
relay mounted on the RH chassis rail... Could be an excuse for a
PAS conversion if that's your thing, as the Ashcroft conversion
adds a few inches to the gearbox length and the LT77 V8
bellhousing adds quite a few more.
Done well it'll be great :thumbs:
#Post#: 98931--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: CaptainSlow Date: September 12, 2015, 4:05 am
---------------------------------------------------------
Thanks fellas,all reassuring stuff :)
DarrenH - slim nose pump - never heard of that before, I thought
they were all the same! I'll have to look into that, I'm sure
it'll help. No problem re the engine output, I'm called Captain
Slow for a reason ;D I'm also aware of the Series front axle
issues but I'm going to see how it goes before worrying about
that - I really don't want to fit Disco axles! That is def a
step too far - the track is too wide and looks 'odd' to me. I'll
be probably keeping the LWB drums for now but may join a group
buy for a disc conversion in the future depending upon funds.
Doug_T - I assumed that I'd still have to do the bulkhead
surgery TBH. I won't know for sure until I do a temporary
install of the engine & gearbox to see how it all sits. Ditto
the props, it'll be a case of adjusting everything to get the
best compromise - I want to change the minimum number of items
so that getting spares will be simpler. I'd forgotten about that
cross member - thanks for the reminder! And re the power
steering... I have been considering a P38 conversion but of
course that has its own clearance issues, hopefully mitigated by
the higher ride height due to me using parabolics.
So, fingers crossed that this lot comes through! I'll let you
know how it goes, and thanks again, its all much appreciated.
#Post#: 98932--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: spitfiremk1uk Date: September 12, 2015, 4:34 am
---------------------------------------------------------
Ref ride hight.
Please dont fall into the noob and ignorant group that think
just by fitting stiffer/taller springs you "fix" issues to do
with clearance and mechanical incompatibility.
Bump stops alone stop the front axle from moving too high.
Stiffer/taller springs simply move the starting point! And
remember bump stops are rubber and compress. The axle should
have full clearance even if the rubber falls off!
Dont worry too much about rear half shafts and diff with the V8.
A previous customer used to pop a half shaft every month with
his 2.25 petrol driving hard (BTW second hand genuine are
stronger than crap part new!) With his V8 conversion we were
expecting expoding axles daily! But he never popped a shaft or
diff from that day forward. A good V8 has so much torque you end
up in higher gears and burbling around. So long as the clutch is
fully engaged before you stamp on the loud pedal you will light
up tyres before snapping anything. Smooth power is king!
My own 2a v8 only ever popped a diff when I got angry on a beach
being silly. Respect the power and it will look after you.
#Post#: 98936--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: niteram Date: September 12, 2015, 12:34 pm
---------------------------------------------------------
if your using the series xfer box then the std front axle will
be ok as you will still be in 2wd most of the time.
there are a few people using permanent 4wd with a std series
axle with no probs, so don't worry.
if your using the lights in wing front end it MAY all go without
stagey/defender front, all depends how it all lines up.
#Post#: 98941--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: CaptainSlow Date: September 13, 2015, 3:27 am
---------------------------------------------------------
Thanks for that, yep its going to be tight but I'm hoping to
keep the std front if I possibly can.
I've now heard back from ebay re my 'purchase' of a 2.5 Defender
petrol engine - they've found in my favour and my money has been
refunded as I expected, so the V8 option is now the only one
being considered. The 2.5 option would have been much much
simpler, but as I haven't been able to contact the seller on the
phone at all, and only twice via ebay, I suspected pretty early
on that it would end up like this.
So thats that - a V8 it will be :smilewide:
#Post#: 98947--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: spitfiremk1uk Date: September 14, 2015, 2:44 am
---------------------------------------------------------
I have done more than a few V8 conversions and if done properly
you can end up with a very nice car indeed. Done badly it
becomes little more than an off road animal.
Early serpentine belt 3.9s offer some advantages with radiator
clearences but a nicely built 3.5 properly tuned on SU carbs is
a lovely engine.
I still favour a conversion plate and rebuilt late series
gearbox preferably with an ashcroft high ratio conversion
transfer box. It all looks great and lovely with the only niggle
being the need to cut the bulkhead and reweld it a little. Of
course there are many options open to you at this point.
#Post#: 98951--------------------------------------------------
Re: V8, LT77 and Series transfer box in a 109???
By: NoelC Date: September 14, 2015, 11:53 am
---------------------------------------------------------
I've owned 5 Solihill machines with the V8 - RR, stage one, 101,
'Snatch' and a conversion done to a six pot one ton with RR
V8+LT95. The factory offerings worked well enough (the well
documented V8 shortcomings taken into account) but the
conversion was simply horrid. Butchered footwells and lack of
access to rear plugs are too much for me to want to live with.
Touching on what has been said above the V8 is perhaps the most
difficult conversion to do well - I've not seen one I'd want to
own myself - yet.
I may be on my own here but as you've not progressed far down
the road at this point it's at least worth considering flogging
what you've got and starting with a stage one if a V8 is really
what you want, I can't swear to it but I believe it's feasible
to swap out the LT95 for an LT85 5 speed box without too much
bother, there were a fair few ex-MoD reconditioned LT85s kicking
about for sale recently. Someone on here is bound to know more.
*****************************************************
DIR Next Page