cornishrob
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| posted on 13/1/06 at 04:10 PM |
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ford granada rear end
with the kit im building its designed to run ford granada rear diff shafts and hubs. However i have been told that should i use this set up with the
chevy LS1 engine i am wanting with 400+hp i will be froever destroying diffs.
Can anyone clarify this for me?
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Danozeman
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| posted on 13/1/06 at 05:23 PM |
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I reckon so unless u can find a Granada Cosworth Diff's which i assume will be stronger. I may be wrong though.
Are better internals not available?
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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froggy
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| posted on 13/1/06 at 05:43 PM |
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some granadas used the 7.5 diff which went into the 2wd cos sierra and are reputably stronger than the 7" but unless you drive like a twat i
doubt youll break it but more likely bugger the viscous lsd
if i ever do another v8 car thats the motor il use its like it was designed to be the best choice for any kit/hot rod , nothing sticking out and the
lowest induction set up ive seen for such a big displacement
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ADD
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| posted on 13/1/06 at 05:44 PM |
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I have read somewhere that a 7" diff (typical from a granny) is rated to about 250BHP. A search should turn up some results.
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cornishrob
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| posted on 13/1/06 at 06:20 PM |
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thanks guys,
I will do some research into cosworth diffs as well as uprated items, both of which i can forsee being more expensive 
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Jon Ison
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| posted on 13/1/06 at 06:28 PM |
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What kit you building ? with all that power up front and most likely a bit light on the rear end lack of traction should take a lot of weight off the
diff so maybe the granny will be ok.
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Johnmor
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| posted on 13/1/06 at 08:36 PM |
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Diff
I may be wrong but i thought all Granadas had 71/2" Diifs, Don't know haow much power they would take though. and not sure what models
fit an LSD, got one from a 2.0l, no LSD.
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cornishrob
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| posted on 14/1/06 at 10:14 AM |
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im building a venom GT2, i see your point with the weight not putting as much pressure on it, the grannys a big heavy old barge.
would the granada diff be the same as the sierra cosworth, because then take silly ammounts of power and torque.
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NS Dev
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| posted on 14/1/06 at 10:57 AM |
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Try and get hold of the diff from a Scorpio 24v. There are loads of these breaking now (the frogeye ones) and the whole cars are only going for
£400-£500 so a diff will be pretty cheap and these are 7.5" lsd jobbies.
I know of a chap using one behind an LS1 (modified one) in a spaceframed opel manta.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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Liam
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| posted on 17/1/06 at 01:41 AM |
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As NS Dev says, look for the running gear from a 24V Scorpio. Ideally a pre-bugeye one as I have a feeling that the bugeyes dont in fact have LSDs
since they use traction control instead (they also have a different rear cover with a big rubber bush mounted to the side). Could be wrong on that,
but if you look for a pre-bugeye 24V Scorp then you are gauranteed an LSD. The same diff as a Sierra Cosworth but without cossie tax!
I dont think the cossie boys worry about the rear diff until about the 500bhp level, and that's in a heavy sierra. A standard 7.5" should
be fine with 400bhp in a light car.
Liam
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cornishrob
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| posted on 18/1/06 at 05:37 PM |
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Thanks guys, now on the hunt for a 24 valve granada to start ripping apart.
Spoke to a ford owners club though and have been told the only difference between the 2wd sierra cossie diff and the granada 24v one is the driveshaft
flanges and the price .
Rob
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