my cases so far :D

hey, heres a few pic s of what ive done so far.. probably crap but a first attempt none the less.

anybody point out where i could have done beter? or where i can carry on?
thanks


also will be sand blasting casings next week

EDIT: updated pics, ive grown some balls and gone deeper in one side, i crapped myself when first hole appeared

let me know what you think. (left rough for now)





apoligies for the bad wuality photo's off my phone in Bad light.

 

looking pretty smooth.


you can go much deeper where the air comes round and up the transfer feeds, don't take any out around the reedblock area though.

the best way to picture it is to put the barrel on the case half and see where the air flows up the feeds, the key is to make the air flow as smoth as possible without losing too much mater ial (less material = less case compression)

 

thanks, yeah i kinda lost my bottle and thought i had better stop before i end up making a mess. thanks for reply

i was wanting to go deeper in that area but i wasnt sure how far to go, ive seen people going right through the cases and back filled with chemichal metal?

was wondering if you take down the cases thinner is there a risk of loosing strength? if so what do you do about this? also does chemichal metal expand at the same kinda rate as the alloy cases? always something i wondered.

 

It's not really a highly stressed area of the engine, personally i don't go that deep into the cases but the chemical metal holds really well as long as you apply it to a rough surface, not polished.

 

cool. thats good anyway im glad i did rough the surface up beforehand.

okay oso you would say to go deeper, i havent modifyed much where the transfers meet, ive matched the cases to the barrel (stock 50 im afraid), is there anything you would grind there?

its a confidence boost to know i havent ruined them yet then..
thanks for the help

 

it depends what your aims are, i would take a little more out where the flow direction changes to the transfer feeds (take the corner off allowing the streightest flow of air possible) but don't go silly.

you can always take more off later and cases aren't that easy to get hold of.

I did an evo2 minarelli and that needed loads taking out to match the standard feeds of the barrel.

 

cool. ill get on it tomorow hopefully and will update.. thanks alot for your opinion

 

looking good
i go alot deeper into the cases than that to really get the air coming around
i also go into the reed area more but i am running a v-force and its a shorter reed

Do you have the pics of what i have done
if not i can post them and show you what i do

 

yeah ive got them thanks, youve gone veryy deep into them havent you, would you reccomend i went anyware near as deep, and backfill holes?

 

yes i would

a modern pipe scavenges so well it will pull a massive neg pressure in the cases so the extra volume is a good thing

 

updated pics at top of page..

 

ok
now your starting to look like my cases more

Very good

 

cool. ive tryed not to go much more into reed area, so its abit of a steeper angle than yours by the looks of it. still got abit more to come off i think and ill start on other side now.
thanks

 

hey, im done for now, both cases are done and ive filled holes..

got a couple of wuestions if people would be kind enough to answer lol.

does chemichal metal set very well onto alredy dried chemichal metal?
when filling holes there was a small indent in one i would like to re-fill and get it right.

also waxhead, if your still reading this how did you sand back once you filled, did you leave it built up then sand blast it, or did you use other methods like emory paper or dremmel to flaten it?

on one side ive done it just by hand and its nearly level but its hard to get the chemichal metal finished flat in relation to the alloy, its wanting to go into kind of a bowl shape? or dipped, if you get what i mean.

apart from this all is going well so far. and i canot wait to get it built up :w00t:

 

I sand blast first and then put jbweld in before i start porting

I then dont have to worry when i break through because i take the jb weld away at the same time

Well normally i do that
Other times i use a catridge roll and smooth it off with that
I get the cases all nice and shiney and then i sandblast them to get the smooth but matt finish on them

 

ohh crap that would have made sence haha... whats a cartridge roll?, infact ill have a look on the internet...
ah yes i know what you mean :banana:

uugh, ah wel ill just give it another layer..

thanks for replys.

 

the imperfection wasnt a bubble, it follows the edge of the hole for about 5 mil? only thinly,

if i were to fill it again i was thinking of taking back the original resin abit, then drilling a hole in it to give the new stuff a kind of anchor?

yeah ive learnt alot by mistakes in the past.. great teaching method.. bad for my wallet :tdwn:

 

jb weld sticks to itslef very well
i wouldnt worry about it at all