my 75 turbodelta, front 330d gearbox

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casta28
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Re: Ciao a tutti!

Post by casta28 » Thu Nov 12, 2015 5:05 am

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the weight is the same of the original turbo's..
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Mats
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Re: my 75 turbodelta, front 330d gearbox

Post by Mats » Fri Nov 13, 2015 10:13 am

"Dual mass flywheel"

Cool project, go for it!
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Re: my 75 turbodelta, front 330d gearbox

Post by Jim K » Fri Nov 13, 2015 12:55 pm

I took part in a Sachs seminar here in Athens a few months ago and the man said 2-mass flywheels are NOT suitable for competition purposes. Sachs themselves recommend they are replaced with normal stuff. Its inconceivable to have ±60* movement of the masses in a race engine!
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Re: my 75 turbodelta, front 330d gearbox

Post by Grdi » Sun Nov 15, 2015 9:27 am

interesting project 8)
lower gear full throttle
casta28
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Re: my 75 turbodelta, front 330d gearbox

Post by casta28 » Sun Nov 15, 2015 11:51 am

wait wait!! pheraps I wrote wrong.. This is not the clutch for dual mass flywheel, this is the modify for put the normal clutch on the bmw gearbox with the dual mass flywheel from fabric...


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Re: my 75 turbodelta, front 330d gearbox

Post by Mats » Thu Nov 19, 2015 3:56 am

That was pretty clear, certainly looks line a dual mass delete on the pictures.
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Re: my 75 turbodelta, front 330d gearbox

Post by kevin » Fri Nov 20, 2015 11:13 am

What type of thrust bearing are you going to use . I have also just remade my flywheel using the E34 M5 unit which I will post pics in my thread . Also was using dual mass as template for my hold centres .
Your Project is coming on nicely .
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Re: my 75 turbodelta, front 330d gearbox

Post by casta28 » Sat Nov 21, 2015 5:10 am

Thanks :) I use the bearing of 330d, we think it's enough..

But I've a problem with the differential... it's very much short.. I try to search the 12/46 of alfa 6 td, but it's impossibile to find.. I hope I can find someone who make it without the original champion...
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Re: my 75 turbodelta, front 330d gearbox

Post by kevin » Sat Nov 21, 2015 12:19 pm

This is info from the Alfa Sei 6 factory book regarding ratios that the car came with :

2.5 manual carb came with a 11:50 (4.54:1) and the injection manual came with a 11 :47 .( 4.27:1 )
And the automatic a 13/47 ( 3.61:1)

I do have a spare 13/47 but its also short with the 5 speed box with 1:1 fifth in my car . Its excellent for hill climbs , twisty circuits and high revving motors but I would also like to cruise on roads to the circuits without sitting at. 3600rpm doing 70mph . Their is a company here in Uk that does cut hypoid crown and pinion but they need the dimensions for a quote . I have not done this yet as been short of time . Send me a pm and I can put you onto the guys if you have a Sei diff that's opened to measure up .
I was hoping to get a 13:42 made .
What size wheels are you going to use as I unfortunately still using 15" ( 225/50/15)
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Re: my 75 turbodelta, front 330d gearbox

Post by Mats » Sat Nov 21, 2015 2:36 pm

Drop all thoughts of an Alfa diff. Use a BMW unit. There are several to chose from and they won't break.
You need a custom driveshaft and halfshafts but you will need that anyway. :idea:
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Re: my 75 turbodelta, front 330d gearbox

Post by kevin » Sun Nov 22, 2015 3:34 am

The BMW diff does give you the most options and they are cheap . You just need to make a cage around it and move your brakes outboard . I do regret not doing it earlier . I have pics of it done in a few GTVs that race in SA . Its also 17kg lighter ,
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Re: my 75 turbodelta, front 330d gearbox

Post by Giuliettaevo2 » Sun Nov 22, 2015 3:57 am

I have a 3.61 and 2x 4.27 in my shed. Heavy stuff..

Always planned using the long one with an overdrive box but decided to go the bmw route.
Drive it like you stole it...
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Re: my 75 turbodelta, front 330d gearbox

Post by casta28 » Tue Nov 24, 2015 2:50 am

I try to answer to all in this post.

there is two reason we decided to use this differential:
the first, my mechanich made (not finish yet) his gtv6 3.0 biturbos with 6 gearbox and 6 diff. he bought a couple of diff, one 11.50 (sell to me) and one automatic use on his gtv. I pay it not much..
the second, in this diff there is a big lsd, and if I wanna use bmw diff I must search a M differential or the diesel have lsd? anyway the hypoid crown for this car are expensive...


For the tyre, I unknown the size, for the street (but I use rarely) 205/45 16, for track if stay in evo fender 17 205/40 or similar...


I buy one of your 13/47 if you sell


Ah, I forgot.. We have external brake, in this mode we put in centre the diff..



Very very thanks to all for the help :):)
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