Few Questions

Hibbz · 19-02-2007, 09:42 PM

Hey guys just got a quote today to supply and fit a set of 3.9's and LSD with all new bearings, gears and what not they said they can tighten the lsd up to 92 pounds all up drive in drive out $1350 they also said i have the option to put in a stronger tailshaft which will cost about $500 installed or $1800 if i get done at the same time.

What do you think???

Also looking at running the car car before i get it done anyone going to calder friday night and if so what do i have to do to have a run?

Cost? Is it cost per run or for the night?
Do i need to book or sign up by a certain time?
What time does it start?
What tyres should i use on the rear? 16" 225's or 19" 245's?
Anyone going who can take me under there wing lol?
Plus what time would i run i got:
Au3 Falcon i6 Sedan
2.5" xorst
Pacie Comps
Hi flow cat
tickford intake
3.08 single spinner
Low 16's???

Thanks in advance

Jake

Hords · 19-02-2007, 09:49 PM

Quote:

Originally Posted by FORD_AU_MAN

Hey guys just got a quote today to supply and fit a set of 3.9's and LSD with all new bearings, gears and what not they said they can tighten the lsd up to 92 pounds all up drive in drive out $1350 they also said i have the option to put in a stronger tailshaft which will cost about $500 installed or $1800 if i get done at the same time.

What do you think???

Also looking at running the car car before i get it done anyone going to calder friday night and if so what do i have to do to have a run?

Cost? Is it cost per run or for the night?
Do i need to book or sign up by a certain time?
What time does it start?
What tyres should i use on the rear? 16" 225's or 19" 245's?
Anyone going who can take me under there wing lol?
Plus what time would i run i got:
Au3 Falcon i6 Sedan
2.5" xorst
Pacie Comps
Hi flow cat
tickford intake
3.08 single spinner
Low 16's???

Thanks in advance

Jake

Which mob quoted you that Jake? And what do you get for a stronger tailshaft?

Cheers,

Rob

AU2PWR · 19-02-2007, 09:54 PM

Quote:

Originally Posted by FORD_AU_MAN

Hey guys just got a quote today to supply and fit a set of 3.9's and LSD with all new bearings, gears and what not they said they can tighten the lsd up to 92 pounds all up drive in drive out $1350 they also said i have the option to put in a stronger tailshaft which will cost about $500 installed or $1800 if i get done at the same time.

What do you think???

Also looking at running the car car before i get it done anyone going to calder friday night and if so what do i have to do to have a run?

Cost? Is it cost per run or for the night?
Do i need to book or sign up by a certain time?
What time does it start?
What tyres should i use on the rear? 16" 225's or 19" 245's?
Anyone going who can take me under there wing lol?
Plus what time would i run i got:
Au3 Falcon i6 Sedan
2.5" xorst
Pacie Comps
Hi flow cat
tickford intake
3.08 single spinner
Low 16's???

Thanks in advance

Jake

$50 Per Car,
Get there at 6.30pm
Just use street tyres , yours 16"s are good
Check with Spoolman or Au1XLS to see there next outing
Yeah , Mid 15s id like to thing

let me know if you want to Go Friday , Ill Tag Along

AU2PWR · 19-02-2007, 10:12 PM

the S.A guys are Running this Friday < come down !

Hibbz · 19-02-2007, 10:45 PM

That quote is at Geelong Differentials

and im not sure on the details of the tailshaft

Hibbz · 19-02-2007, 10:46 PM

Yeh i think im go on friday have a bit of a squirt hope to see a few of yas there thxs for the reply au2pwr

Eu-GenixX · 19-02-2007, 11:26 PM

i'd like to know what you get for ya 500 bucks with the tail shaft...

Hibbz · 19-02-2007, 11:32 PM

ill give them a call about the tailshaft anything i should be asking other than matarials used and what parts are reused/second hand??

Does $500 sounds a bit low or a bit high??

AU dude · 19-02-2007, 11:51 PM

tail shafts are fine in the au's. you might need a stronger one if your goin to be driving over 180km/h for long periods of time, but is all you'll really need is a brace ( so it doesnt act like a grenade when it hits the ground) for the shaft if you drive at that speed...
1350 is a pretty good price, especially if they are changing ratio. does it include speedo calibration? because ford dont sell a speedo gear higher than 3:45 ratio diff...

Eu-GenixX · 19-02-2007, 11:57 PM

i got a mate in the tailshaft business.. and to me it sounds high.. but.. it might depend on what materials are used..

he makes custom shafts for all sorts of cars.. including a rx7 with over 700hp atw.. and other 9 second rotories....

Hibbz · 19-02-2007, 11:58 PM

not sure of the speedo but ill find out.

about the tail shaft when i upgrade to 3.9s my tailshaft will be traveling at a lot faster when doing same speed as before and therefore the damage you may do at 180 i may well do at lower speeds such as in the 140 to 160kph not sure does anyone know when my speed limiter will come in with 3.9s

hope that make sense there a guy from ford mods that removed speed limiter for a dyno run and the tailshaft let go at 192 i think and did a **** load of damage.

Thanks Jake

Hibbz · 20-02-2007, 12:00 AM

thanks for the reply about the tailshaft would you be able to pass on his details or ask him what type of price i should be looking at and what i should get for that.

Thanks Jake this helps heaps

AU dude · 20-02-2007, 12:08 AM

well when i put my 3:45 lsd in the speedo was out massively. i used a GPS to test my actual speed. at 180kmh on the dash i was actually doin 160, so with a 3:9 ratio it will probably be around 140kmh but you wont know unless you get the speedo calibrated. and 140kmh is as fast as you'll go because the dash is telling the comptuer your doing 180 and you get fuel cut.

Hibbz · 20-02-2007, 12:16 AM

Thats what i mean 140 converted to miles is 87.5 which will mean i will be hitting the speed limiter at the end of the quater mile and if i up the limter i am risking tailshaft failure arnt i??

Any help would be greatly apreciated.

Thanks Jake

AU dude · 20-02-2007, 12:25 AM

140kmh is actually 86.991 mph. im not a fully qualified mechanic yet. so speak to your diff specialist, they will give you the right advice on that matter,

Hibbz · 20-02-2007, 12:32 AM

Thanks Mate

Hibbz · 20-02-2007, 07:45 PM

Can anyone shead anylight on the tailshaft issue would i need a better one if i was to lift the speed limiter to between 180 and 200 with 3.9s???

Thanks Jake

jonbays · 20-02-2007, 08:14 PM

The price is good for the diff swap and a bit high for the tailshaft but .... there are tailshafts and tailshafts.

The stock Tailshaft won't like it if you drive over 140kmh much as it will be spinning like it was at 180 which is why the speed limiter will cut in. two piece tailshafts would be the go but a quality one piece will be a good look. Unless you really road race just street up to speed limits and drag race i would stay with the stock tailshaft and put a hoop around it.

For $10 stick a black 23 tooth speedo gear in and that will at least get you across the qtr before the limiter cuts in and get the speedo reading a bit closer to real.

AU2PWR · 20-02-2007, 09:54 PM

Give Northern Differentials a Call , Chris From Bluepower can Also Help you , Tailshaft and Diff Gears KING!

87.5 should see a High 15 Pass , so get some advice , call Chris , and Come RACING !

Hibbz · 20-02-2007, 10:57 PM

Yeh ill give him a call tomorrow and get some advice.

Cant wait to get her down to the track so i can do a before and after result showing the difference of the new gears.

Thanks Again

AU2PWR · 20-02-2007, 11:11 PM

no worries

Hibbz · 21-02-2007, 04:56 PM

Ok had a talk to Chris at bluepower today and he reccomends putting in 4.11's or atleast 3.9's or i will be dissapointed with the improvement compared to the outlay he also didnt seem to concerned about the tailshaft.

My questions are how do i correct my speedo with 4.11's and 3.9's??
What will my revs be at with the 3.9's and 4.11's??

Thxs Jake

AU2PWR · 21-02-2007, 05:03 PM

If you get it done from him , he can give you a Printout , showing all the differences , it shouldnt be that far out though

Hibbz · 21-02-2007, 05:20 PM

Yeh he sounds like a top bloke it will possibly being done by them on monday pending there stock.

Just worried about how much the difference in economy on the highway. im getting like 700ks now with mainly highway with some mixed going through towns.

AU2PWR · 21-02-2007, 05:30 PM

Chris will let you know anything you need , just ask him ,

AU dude · 21-02-2007, 06:03 PM

just remember when you change the ratio to 4:11 your car will rev at like 3000rpm at 100km/h. so all fuel economy goes out the window...
3:9 will be a better option keeping revs at a reasonable rpm...

Hibbz · 21-02-2007, 06:27 PM

Well atm i rev at 1850 at 100k's with 3.08
with 3.7's i think 2240
with 3.9's i think 2342
with 4.11's i think 2468

I worked that out by 1850 divided by current ratio times by new ratio.

So how bad would my highway k's at 2468rpm be

Thanks Jake

AU2PWR · 21-02-2007, 06:35 PM

450-585 per tank. Like I Said , ask Chris , He will know ,

jonbays · 21-02-2007, 08:08 PM

I have put up a gearing chart in my gallery it will tell you the real kmh per 100rpm and so on its here

http://www.fordforums.com.au/photos/...cat=500&page=1

Hibbz · 21-02-2007, 09:05 PM

Jonbays your a Champ!!!

Only question is how would 245/35/R19 wheels affect those figures.

Thanks Jake

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