topcat 11 Report post Posted June 29, 2009 in the shop now,wont be too long before its back on the road. might make some mild alterations to the runner length while its there. its easier when its off for a reason Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted June 29, 2009 Maybe a pressure blow off valve in the manifold Martyn ??? Quote Share this post Link to post Share on other sites
Jamez 2147483647 Report post Posted June 29, 2009 impressive Quote Share this post Link to post Share on other sites
Apex Effects 3 Report post Posted June 30, 2009 that would have be one heck of a bang to split the seem like that. alterations to prevent a repeat? Quote Share this post Link to post Share on other sites
soarer260@hotmail.com 0 Report post Posted June 30, 2009 Nasty Marty. Hope you sort it out with ease & can prevent it from happening again. Quote Share this post Link to post Share on other sites
Greg111 13 Report post Posted June 30, 2009 Be lucky it wasn't a plastic one, pieces for africa. Quote Share this post Link to post Share on other sites
topcat 11 Report post Posted June 30, 2009 (edited) that would have be one heck of a bang to split the seem like that. alterations to prevent a repeat? could do,some sort of bov.but i'm leaning to spend alittle more on the dyno and tune at this stage of the day. backfires arnt really a problem on injected engines,if setup right. ` Edited June 30, 2009 by BM Weapon aka topcat Quote Share this post Link to post Share on other sites
No name user 379 Report post Posted July 2, 2009 (edited) when i make any intake manifold under presure i never using any ally under 5mm thick the plenum should be around 2x engine displacment and avoid sqaure ends or corners to spilt a setup like that can also be caused by cam timing out or to lean on overun,or a valve not seating causing a backfire blow valves sit before the manifold and dont affect them in anyway to cause the manifold to split, Edited July 2, 2009 by crunchy Quote Share this post Link to post Share on other sites
lounit 0 Report post Posted July 5, 2009 looks like lack of root penetration or fusion in the the welds to. leave a good 1.2 mm gap when tig welding anything like this...i have welded t6 aloy boxes together that in test has withstood 3000psi Quote Share this post Link to post Share on other sites
No name user 379 Report post Posted July 5, 2009 looks like lack of root penetration or fusion in the the welds to. leave a good 1.2 mm gap when tig welding anything like this...i have welded t6 aloy boxes together that in test has withstood 3000psi thats true but looking at the surface area of the manifold being too big with no reinforcing it would balloon out and burst,even carbon fibre ones ive made in the past we needed atleast 8mm thickness to withstand 20psi. when we went thinner we also got pulsing under vacum giving poor vacum signal. Quote Share this post Link to post Share on other sites
lounit 0 Report post Posted July 6, 2009 thats true but looking at the surface area of the manifold being too big with no reinforcing it would balloon out and burst,even carbon fibre ones ive made in the past we needed atleast 8mm thickness to withstand 20psi. when we went thinner we also got pulsing under vacum giving poor vacum signal. keen to have a look at that intake...sounds hella kool.i currently hold my 4703 ticket in tig keen to fabricate this kinda stuff Quote Share this post Link to post Share on other sites
No name user 379 Report post Posted July 6, 2009 keen to have a look at that intake...sounds hella kool. i currently hold my 4703 ticket in tig keen to fabricate this kinda stuff i haven't kept my ticket up which was i believe 4711, and since I'm not building to many bridges these days its not allot of point to be honest unless your after the bling factor or weight saving the carbon way isn't cheap and dam time consuming,the two we did one was on a 911 turbo and the other a Lexus v8 they looked great but a pain to build,we even did cooler piping from carbon and vacuumed it and dam they were light and strong and that was worth the time. used PVC piping to make the shapes we wanted and molded them on the inside,you could bounce a sledge hammer of them Quote Share this post Link to post Share on other sites
lounit 0 Report post Posted July 6, 2009 i haven't kept my ticket up which was i believe 4711, and since I'm not building to many bridges these days its not allot of point to be honest unless your after the bling factor or weight saving the carbon way isn't cheap and dam time consuming,the two we did one was on a 911 turbo and the other a Lexus v8 they looked great but a pain to build,we even did cooler piping from carbon and vacuumed it and dam they were light and strong and that was worth the time. used PVC piping to make the shapes we wanted and molded them on the inside,you could bounce a sledge hammer of them i had to pay 5grand at nzwelding school last year to get my 4703 witch is the new nz standard for tig im currently sitting a CAT in welding and fabrication at unitec the 4711 is for arc and mig witch i have now got, both just standard no vertical or down hand tickets...found them to hard...it helps to have a cupple of years experence under your belt to bother with them.i could imagine how time consuming that would of been wot did you charge buy the hour for that? haha Quote Share this post Link to post Share on other sites
No name user 379 Report post Posted July 7, 2009 i had to pay 5grand at nzwelding school last year to get my 4703 witch is the new nz standard for tig im currently sitting a CAT in welding and fabrication at unitec the 4711 is for arc and mig witch i have now got, both just standard no vertical or down hand tickets...found them to hard...it helps to have a cupple of years experence under your belt to bother with them. i could imagine how time consuming that would of been wot did you charge buy the hour for that? haha i did my ticket may years ago and then became a toolmaker,then after that took up design engineer and cadcam engineer which are all just bits of paper,lolol now i just design and build custom turbos for people around the plant so that consumes alot of my time. yes the labour thing,it turned into more a love of labour but it was interesting and fun to do. Quote Share this post Link to post Share on other sites
lounit 0 Report post Posted July 7, 2009 yes the labour thing,it turned into more a love of labour but it was interesting and fun to do.oh mate i bet. Quote Share this post Link to post Share on other sites
keen 6 Report post Posted August 1, 2009 how is it all going now? have you fixed the problem and are there some pictures? really interested Quote Share this post Link to post Share on other sites
topcat 11 Report post Posted August 2, 2009 how is it all going now? have you fixed the problem and are there some pictures? really interested All good,just back from another run down to the waikato and back. runs ok,not tuned yet. still running the e28's fuel map with a 2.5bar regulator. not really any different engine bay wise,maybe tidier. at 6psi it doesnt set any new speed records,but lights the rears in second,so its a start. that,and still does twice the open road speed limit with ease builds boost from 2k and i estimate 3.5 is full,hard to tell,as i still have a small leak in the intake manifold that wasnt fixed last time it was off looking for sum more intake gaskets as the ones on it now have been recycled ones already with the last problem.dont think they'll do the job a third time round. interior is basicly done,looks good. lots of vibrations coming thru the car/seats. dont think the wheels are 100% round. might ask for votes on how i should have them refurbished-but thats another thread i'll post pics later m Quote Share this post Link to post Share on other sites
