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 1700 Crank on 1500 balance shaft?
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beardydave
V4 Beginner

61 Posts

Posted - 05 Aug 2018 :  18:02:39 Show Profile Reply with Quote
Whats the impact of this?

More vibration im guessing, but is is too much? Car will be a road car, not a track.

melle
V4 Guru

United Kingdom
2535 Posts

Posted - 05 Aug 2018 :  18:11:34 Show Profile Visit melle's Homepage Reply with Quote
The S&R catalogue prescribes a 1500 balance shaft for a >1700 engine, so should be OK. I'm still not sure what the differences are: http://www.saab-v4.co.uk/speedball/topic.asp?topic_id=33271 I have 1700 balance shafts for sale if you insist on using one, but to be honest I wouldn't bother if you have a good 1500 balance shaft.

www.saabv4.com
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TTruckie
V4 Fanatic

United Kingdom
286 Posts

Posted - 05 Aug 2018 :  21:55:22 Show Profile Reply with Quote
I've got a 1500 balance shaft in my tuned 1700 engine and seams fine. A guy who has rallied V4s for years said he always used 1500 balance shafts.
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beardydave
V4 Beginner

61 Posts

Posted - 06 Aug 2018 :  19:32:14 Show Profile Reply with Quote
Sounds ok to me then.

I've got enough to do on that engine without buying more bits.
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Woody
V4 Guru

United Kingdom
2412 Posts

Posted - 06 Aug 2018 :  21:09:49 Show Profile Reply with Quote
The Competitions Dept recommended the 1500 balance shaft to be used in 1500 and 1700 rally variants. See the Tuning Guide.
I used to have a tuned 1730 motor and it too had the 1500 balance shaft.
Just to confirm what has already been suggested.

Edited by - Woody on 06 Aug 2018 21:12:25
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