|
Post by henri on May 24, 2018 7:19:08 GMT
ive got a die-grinder tz ,not as good quality as the rotozip tho .running 6mm burrs ,but theres so much material to remove its slow going .H
|
|
|
Post by tzsteve on May 24, 2018 16:32:42 GMT
get the rotozip these are cheap typically about £35 and very, very rapid
i have a selection of die grinders but the rotozip is the first and the fastest of them all
|
|
|
Post by henri on May 26, 2018 11:35:38 GMT
|
|
|
Post by tzsteve on May 30, 2018 15:12:55 GMT
nice little wizzer
|
|
|
Post by henri on Aug 1, 2018 9:56:30 GMT
|
|
|
Post by ginch on Aug 1, 2018 10:35:58 GMT
|
|
|
Post by tzsteve on Aug 1, 2018 19:44:47 GMT
just a thought, will the vespa guarantee still be valid?
|
|
|
Post by ginch on Aug 1, 2018 22:29:52 GMT
|
|
|
Post by henri on Aug 9, 2018 11:57:10 GMT
its all genuine vespa parts so reckon guarantees should be ok. IMG-20180809-01052 by henri briggs, on Flickr IMG-20180809-01053 by henri briggs, on Flickr . had a rainy morning so locked myself in a dry shed an got on with it .ready to go be machined now . but scored a cheap polini kit 152cc at the weekend ,so need to dry build lump again an measure up with new barrel. should be same but with the hours ive got into this packer i aint risking it . H
|
|
|
Post by triffid on Aug 9, 2018 13:41:43 GMT
mmmm, 152ccs of fun fun fun
|
|
|
Post by henri on Aug 19, 2018 7:18:38 GMT
152cc barrel turned up , so time for a measure up. IMG-20180817-01078 by henri briggs, on Flickr.finding tdc IMG-20180817-01079 by henri briggs, on Flickr . polini barrel needs skirt shortening before fitting but as overall external dimensions are same an comp heights same used the altered t5 barrel . IMG-20180817-01080 by henri briggs, on Flickr .negative deck height of 3.92 , with 2mm off packer ,an +.25mm gasket ,an recess of .92 inside head ,bit of maths an roughly 2mm from top of barrel =1.3 squish . IMG-20180818-01089 by henri briggs, on Flickr . an a cheap t5 barrel exhaust stub turned up, so thought it would be rude not to offer up an see whats needed for a exhaust to fit . H
|
|
|
Post by ginch on Aug 20, 2018 3:22:33 GMT
This thing is going to be amazing.
|
|
|
Post by ozoap on Aug 20, 2018 6:30:31 GMT
Looking good!
|
|
|
Post by henri on Aug 20, 2018 10:00:16 GMT
glad you like it OZ , guess who i'm going to come begging for the machining i need ,pretty please . H
|
|
|
Post by ozoap on Aug 21, 2018 3:00:25 GMT
I should be about next week
|
|
|
Post by henri on Aug 24, 2018 9:44:58 GMT
final measure up , took me boots off so could count to 20 , problem found . IMG-20180822-01096 by henri briggs, on Flickr . pistons seriously sticking out of barrel at bdc , my minds screaming piston skirt fractures ,major no-no . marked pistons ,thats with a shortened barrel an oversize packer .with 2mm off packer barrel sits lower so lines 2mm to high . its just under the boss for pin , seen other short pistons like this ,but only on 4 strokes ,not happy . IMG-20180822-01097 by henri briggs, on Flickr major re-think , open spigot opening on cases 70mm dia by 4mm deep .cant go further as into bolt holes then , let barrel protrude thru packer by 4mm an bingo piston only drops 3mm out at bdc . IMG-20180824-01100 by henri briggs, on Flickr 3mm off piston skirt is this much ,the shiny machined area, much happier now . opinions please gents , am i chasing my tail , does piston need shortening , am i going? mad (madder) . please no answers on a postcard ,i cant sleep nights an they will take to long to arrive . H
|
|
|
Post by henri on Aug 24, 2018 12:33:35 GMT
major fucking panic in the shed this morning ,looking at were i was planning on having spigot opened an saw a hairline crack i was going to seal had opened up an ran through to case bolt hole .bugger , my tig only runs 30-40 seconds an then cuts out,been broke for years ,still thought do it 1 blob at a time an let cool between be fine . old crack with oxide contanimation on poor purity sand castings= a rapid i'm seriously messing this up. had parcels to post so slung cases in van an went saw my welder friend . "when do ya want em" says he ,"by nxt week" says me , "best do em now then ,as in a hour i'm off on holiday for 2 weeks " . IMG-20180824-01101 by henri briggs, on Flickr . 15 minutes ,£10 an a pint ,big sigh of relief . IMG-20180824-01102 by henri briggs, on Flickr .run a drill thru an ten minutes careful draw filling ,an were back on track i think . IMG-20180824-01103 by henri briggs, on Flickr . i need a lie down in a darkened room . H
|
|
|
Post by tzsteve on Aug 24, 2018 15:19:44 GMT
i would shorten the piston if it did not fit ( ie fowling the case ) otherwise i think i would leave it
the case work looks good. these things are sent to test us
|
|
|
Post by henri on Aug 25, 2018 7:31:08 GMT
thanks TZ , i value your opinion , my brain was screaming skirt fracture but wasnt sure , 3mm off it is . H
|
|
|
Post by henri on Sept 14, 2018 15:18:21 GMT
IMG-20180912-01163 by henri briggs, on Flickr . OZ came through again , nice load of toys to take into my playpen . IMG-20180913-01170 by henri briggs, on Flickr . never thought i'd find a limit to my "put together,measure,split,fettle an repeat" patience ,but man-flu's got me giving up at 2 hours . IMG-20180913-01171 by henri briggs, on Flickr .had to have a lie down an go back out later to measure timings .inlet 180 ,exhaust 190 ,trans 140 .without gaskets so will go up a tad ,an should be a squish around 1.30-1.35 H
|
|