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Crank Welding Advice ... Do's & Don'ts !
Posted: Mon Mar 24, 2008 11:11 am
Author: Pigford
I wanna get me Z1000 crank welded....... I know a good Engineer, but he has no prior experience with this subject.
Are there any serious things to consider, apart from any localised excessive heat
Posted: Mon Mar 24, 2008 12:56 pm
Author: Pasc
Mark, hopefully Steve Debben or one of the guys with more experience will give you a more comprehensive answer but you will probably want to index the rods before welding to make sure everything is straight and in line before welding. If I remember this is done by putting a tool steel rod through the small ends. Also, make sure your welder does not clamp the earth lead on the far side of the bearing of the pin you are welding as this could "fuse" the big end bearing.
Good luck.
Posted: Mon Mar 24, 2008 3:47 pm
Author: FER
Got my crank done by Cris Appelbee with no problems . These jobs are better left to people who know what they are doing , so easy to fuck things up .
fer
Posted: Mon Mar 24, 2008 3:53 pm
Author: Pigford
OK lads, sound advice, probably what I expected, but didn't want to hear
Crank alignment, indexing... ????????????????????
Experts in this field...... ???????????????????
Pants
Posted: Mon Mar 24, 2008 5:12 pm
Author: london calling
Half man Half pig,just stick to the IRONING
crank
Posted: Mon Mar 24, 2008 8:45 pm
Author: fastbyme
your man for crank welding is , dave branch ..done properly as good as falicon !! had one of daves cranks in compbike for three seasons now and not a hint of trouble
Posted: Mon Mar 24, 2008 9:09 pm
Author: Pigford
Cheers Fastbyme.... have you got any contact details pleeze
Posted: Tue Mar 25, 2008 8:17 am
Author: Dark Skies
FER wrote:Got my crank done by Cris Appelbee with no problems . These jobs are better left to people who know what they are doing , so easy to fuck things up .
Yeah, he did my 1000-H crank way back when. Spot on job.
Posted: Tue Mar 25, 2008 8:36 am
Author: RALPHARAMA
I didn't think that crank welding was really necessary until you started pulling really silly amounts of power out of these engine - when you start playing with super chargers or NOS etc?
At what sort of power level would welding up the crank be deemed a requirement? I always had the impression that it was only done by really manic drag racers who were really pushing the envelope
Posted: Tue Mar 25, 2008 9:32 am
Author: Steve R
Anything over about 110bhp I would say
Posted: Tue Mar 25, 2008 12:21 pm
Author: Pigford
I'm looking at an extra + 50 bhp...... to start with
My RedZed project will be a 'Street-Sleeper'.......
Posted: Tue Mar 25, 2008 6:03 pm
Author: FER
When you are building an engine which has had tuning work done to it it is a good idea to do as much work as you can afford to make the engine stay together . Welding the crank up is one of those jobs that makes you a little bit happier when you are screaming the engine through the gears .
fer
Posted: Tue Mar 25, 2008 6:27 pm
Author: london calling
Or in Pigfords case,a really,really large basket of ironing
Posted: Tue Mar 25, 2008 6:46 pm
Author: Pigford
Jack AVON-Calling, I expected some useful comments from you me old mucker
Must admit, I think the crank welding is a bit OTT, but as Fer say's, best to get it done - Proper Job, like
Posted: Tue Mar 25, 2008 6:54 pm
Author: Pasc
Not OTT at all Piggy. I've heard stories of twisted cranks on stock motors due to missed gear changes (not first hand but from reputable sources). As Fer said, small price to pay for peace of mind.