ausmini https://www.ausmini.com/forums/ |
|
Fast, Reliable But Not So Cheap - 1380 BMW K1200 EFI https://www.ausmini.com/forums/viewtopic.php?f=5&t=96193 |
Page 2 of 11 |
Author: | michaelb [ Thu Nov 09, 2017 11:58 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
Hi Joe, Good to see you making better progress with the kit than I did and I will be watching your journey. |
Author: | 1071 S [ Fri Nov 10, 2017 4:30 pm ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
I'm dying to hear about the "cheap" part of the thread label Cheers, Ian |
Author: | jpodge [ Fri Nov 10, 2017 5:43 pm ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
1071 S wrote: I'm dying to hear about the "cheap" part of the thread label Cheers, Ian me too to be honest |
Author: | low n blown [ Tue Nov 14, 2017 6:30 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
drmini in aust wrote: Centre strap is only really useful on race motors, the cap can break on overrun if you overrev the engine to a zillion RPM during downshifts. As for cap flexing, on all except (maybe) S blocks it is grey cast iron. Doesn't flex, it cracks instead. It would rather break than bend. I put a strap on this stroker but have not used one since. Second this. Not necessary. In fact the issue is resolved by removal of the lower half of the thrust washer, brazing up the end of the face on the cap so you only run half of a thrust washer. Alternatively machine down the lower half of the thrust washer 10thou so no side load can be put onto the cap from the crank. The sideways flex of the cap by forces put upon it from the crank are what makes it crack. Adding a strap over the cap has the disadvantage of using longer bolts. Longer bolts, more flex. |
Author: | 9YaTaH [ Sat Nov 18, 2017 7:37 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
Neat! Love the Mamba's |
Author: | LeylandMiniPhil98 [ Mon Nov 20, 2017 5:13 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
That’s not fair. Why does your garage get to look so clean and tidy... Always cool to see another twinky project! I’ve got the engine, I’ve just got to get the head and kit, then I’ll be doing mine next year. Same idea basically, less the toilet paper. Just need to get my mini on the road first, then it’s not taking up space on the shelves and I can fill them with new parts... |
Author: | TheMiniMan [ Mon Dec 11, 2017 6:08 pm ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
yeah thanks for the kind words, cheers we like to help as much as we can, when & where we can i use the A+ type rods on these builds & i`d suggest finding a set of those instead of using those big heavy weak lumps of things , but they will be ok-ish if you lop the big lumps off them too, so don`t stress the center main cap strap thing is a bit of a mith really,,, we set the thrusts up so the lower thrusts are really thin,,, grind them down so you have approx 15-20 thou clearance,,, effectively then only using them to hold the upper-thrusts in place, this way the crank wont "push" on the lower thrusts when the crank flexes,,, this saves the bolts fatiguing, which is the big problem with high-revs & Harmonic-nodes & crank flex. it`s going to flex so i say "Let it" , it will straighten out in the higher revs again ... just don`t let it "push" on the lower-thrusts, therfore it won`t "wobble" the center main-cap. therfore it won`t fatigue the main-cap-bolts... Got it? (& no more tunnel boreing needed either easy-peasy & we`ve been doing it that way since i was a little kid the cam will be fine if you "de-lobe" it &&& fit one of Docs "spade-drive adaptors" into the bum of it, then use a metro, spade-drive , steel-backed, hi-vol pump to suit, then all will be good keep up the good work mate, it`ll fly |
Author: | TheMiniMan [ Mon Dec 11, 2017 6:16 pm ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
oh yes, & Steve is right, we have had to speedy-sleeve some of the old style pulley bosses too, sorry. worth it tho, some are softer than others. We now have a new-kit in process with lighter pulleys, but "Steel" bosses so no groove with happen altho the new pulleys when complete with bosses are actually lighter (by lots) than the old ones However we are still waiting for them all to be finished nothing wrong with the old ones after speedy-sleave tho & yes the main-cap issue is also a matter of fitting longer bolts with a main-cap-strap,,, so again it`s something i like to do-away-with, just relieve the lower thrusts of a pile of thinckness & whack em in to simply hold the uppers in place,,, easy to do & don`t even need to be that accurate. & doesn`t cost diddly squat to do & i thought i had put in the guide to Loctite on the upper-cam-pulley-boss-bolts to stop oil leaks,,, i`ll have to check the guide now stay tuned Edit--> & we use Adaptronic ECU & our own loom & sensor package, we`ve discussed this with him but basically any after-market ECU will work so no dramas (if you have decent computer people & quality loom & sensors & someone who knows what he`s doing with the tuning), ((Hey Steve???)) We also have used Link & Motec ECU`s too, again with no dramas. |
Author: | Ian_B [ Tue Dec 12, 2017 7:55 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
Impressive stuff |
Author: | dalmeny [ Thu Dec 14, 2017 10:43 am ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
100% what Matt said about ECU and tuners. I should have listened. |
Author: | Paddy [ Thu Jan 11, 2018 3:35 pm ] |
Post subject: | Re: Cheap, Fast, Reliable - Pick Two or Pick Twinky |
jpodge wrote: It just sounds like a very small knock with each rotation of the wheel/driveshaft. When I jack the car up and spin the wheels by hand it doesn't seem to make the noise. I had a similar issue a while ago, when you jack the car up the suspension/driveshaft drops, try lifting the wheel up while it is jacked up and you might find it is the zip tie on the boots but it only hits when the wheel is at the normal driving height. |
Page 2 of 11 | All times are UTC + 10 hours |
Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |