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Serpent33 · Posted: Wed Mar 01, 2006 7:13 pm Post subject: Final drive setting

Dear guys, In my country, the Honda 1.6's are almost impossible to be beaten by a 33 on straights. Street cars that is. Their standard final drive is about 4.3. Commonly uprated to even closer ratios. Wheras 33's are commomly found with 3.7 or 3.89 I think 4.1 would be an excellent change to begin with.

I have matched the 35 crown to 9 pinion. Tolerance for gear is marginally more snug fit. Hopefully the result will be good. This is a standard ratio for some very rare bower alfas actually.
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Each time I speed I say, "Dear lord, make me fast and accurate..."

tvatavuk · Posted: Wed Mar 01, 2006 11:06 pm Post subject:

Friend of mine had fitted 1.7 8v boxer into his S2 1.5 4c 4x4 SW, used same 4c carbs.
That 33 runned through gears like crazy, it was slightly faster then 1.7 16v chiped, up to 105km/h or should I say by the time I was hitting 3rd gear he was in 4th Smile

But After that we would just go away.
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Tino Vatavuk
Little black dress which replaced Alfa Romeo 33 S 16v Permanent 4 GMo

Serpent33 · Posted: Thu Mar 02, 2006 2:34 pm Post subject:

On specs, the 1.7 8v carb runs on 3.7 final drive. I dismatled one yesterday and counted it. 10/35. That's where I got the 35 crown on. Bases on specs, doesn't the 16v have a closer ratio?
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Each time I speed I say, "Dear lord, make me fast and accurate..."

tvatavuk · Posted: Thu Mar 02, 2006 6:38 pm Post subject:

From my memory:
that S2 1.5 4c had to engage 3rd around 100km/h
16v had to engage it around 115km/h
Problem here is that 8v had rpm limit at around 6250, while 16v was 500rpm higher.
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Tino Vatavuk
Little black dress which replaced Alfa Romeo 33 S 16v Permanent 4 GMo

Vecchio Alfisti · Posted: Sat Mar 04, 2006 12:16 pm Post subject:

Hi Serpent33

Useful to know that your 1.7 had a 10/35 diff ratio. I am almost sure that mine is 10/37.

According to this Link http://www.alfa-pages.co.uk/gearbox.htm the S3 16v should be 9/35. I found somewhere (dont know where) a reference to the 33 Series 1 1500 single carb having an 11/39 final drive diff ratio. May be worth hunting for if you can get the Crown and pionions to mesh properly.

I already posted on the maintenance forum. Good luck with the meshing.

John
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Alfa 33 1.7 QF I think maybe now I m not so sure

Serpent33 · Posted: Sat Mar 04, 2006 9:39 pm Post subject:

I know, it's kindda interesting. Actually even 10/35 was found stamped at the crown wheel.
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Each time I speed I say, "Dear lord, make me fast and accurate..."

Serpent33 · Posted: Sat Mar 04, 2006 9:45 pm Post subject:

The 11/39 comes standard in the S1 1.5 and 1.5 QO. 1.3 S1 is 9/35. This is as stated in the S1 catalogue. I have the S1 but I suspect gearbox had been changed before.
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Each time I speed I say, "Dear lord, make me fast and accurate..."