Celica RA45 Posted March 25, 2014 Share Posted March 25, 2014 the 205 were in a special head with 35mm buckets on both sides ,the cam seems to mark up about 10mm from the top the other cams which were about 268 at 50 thou and 575 thou lift has 2 much velocity we try to keep the cams to about .01000" this new 1 the 263 is max vel is .01074" the super tourer is .01084" the 205 is .01135" and the 178x is way over the last 1 close to 12 from memory and on the dyno lost power every where. we wernt using vvti and had the cam fixed at 100 lobe center and we tried moving it either way from 105 to 95 to see how it would go Quote Link to comment Share on other sites More sharing options...
CorollaGT Posted March 31, 2014 Share Posted March 31, 2014 For camshaft run in I see you guys (Kelfords) say that you should not run synthetic oil. Should I be using proper engine run in oil or just a non - synthetic oil such as Castrol Modern engine? Quote Link to comment Share on other sites More sharing options...
kpr Posted March 31, 2014 Share Posted March 31, 2014 from memory rob recommended using a mineral with zddp. i just threw in some penrite hpr30, for cam run in. bit thick, but is mineral with zddp and easy to get hold of. 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted March 31, 2014 Share Posted March 31, 2014 or add 20% moreys 1 Quote Link to comment Share on other sites More sharing options...
phatt20 Posted March 31, 2014 Share Posted March 31, 2014 has moreys got zddp in it? Quote Link to comment Share on other sites More sharing options...
Ranter Posted March 31, 2014 Share Posted March 31, 2014 Fuck Moreys, I use it in old steering boxes only. We have a boat spec 400hp 454 ex Hamilton Jet. Built by some joker in Queenstown who apparently builds the engines for all the river boats down there, we have put in an old Chevy C10 and it goes fine. (if a little fucking scary) Do you know if there would use a special cam grind for the boat engines? If so what would be the best grind to replace it with? 2 Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted March 31, 2014 Author Share Posted March 31, 2014 For camshaft run in I see you guys (Kelfords) say that you should not run synthetic oil. Should I be using proper engine run in oil or just a non - synthetic oil such as Castrol Modern engine? I would personally use a break in oil as some mineral oil these days do not contain ZDDP. It is only once and generally pretty cheap. If you do want to use a normal mineral oil maybe run an engine break in additive and make sure the cam has good coating of cam lube (normally supplied with the cam) to aid the cam break in process. Fuck Moreys, I use it in old steering boxes only. We have a boat spec 400hp 454 ex Hamilton Jet. Built by some joker in Queenstown who apparently builds the engines for all the river boats down there, we have put in an old Chevy C10 and it goes fine. (if a little fucking scary) Do you know if there would use a special cam grind for the boat engines? If so what would be the best grind to replace it with? Boat stuff is normally ground on close lobe centers and fairly mild - for epic mid range torque. Plenty of people use our jetboat v8 grinds in road cars wanting great driveability so I wouldn't really worry about putting a new cam in the C10, unless you are missing the top end. If you do want more top end I'll need the rest of the specs of the motor/trans to suggest something that will work well. Was the motor built by Andy? 2 Quote Link to comment Share on other sites More sharing options...
thorburnville Posted April 29, 2014 Share Posted April 29, 2014 Why are you supposed to break in a cam above 2000rpm? Quote Link to comment Share on other sites More sharing options...
Yowzer Posted April 29, 2014 Share Posted April 29, 2014 Coz the cam spins at half speed 1 Quote Link to comment Share on other sites More sharing options...
Rookie Posted April 29, 2014 Share Posted April 29, 2014 because it reduces the load on the nose of the cam and splashes more oil around. http://www.kelford.co.nz/flat-tappet-cam-break-in 1 Quote Link to comment Share on other sites More sharing options...
thorburnville Posted May 2, 2014 Share Posted May 2, 2014 Thanks Quote Link to comment Share on other sites More sharing options...
westy Posted October 13, 2015 Share Posted October 13, 2015 This thread still alive? Have a mate with a BMW 850i which is basically a couple of m20s welded together. Anyway, apparently he's been told (by Kelfords if I remember right) that the cams in it are unable to be reground. To me that sounded a bit odd seeing as they are more or less a pair of I6 cams. Any thoughts on whether this is correct chaps? Quote Link to comment Share on other sites More sharing options...
smokin'joe Posted October 13, 2015 Share Posted October 13, 2015 This thread still alive? Have a mate with a BMW 850i which is basically a couple of m20s welded together. Anyway, apparently he's been told (by Kelfords if I remember right) that the cams in it are unable to be reground. To me that sounded a bit odd seeing as they are more or less a pair of I6 cams. Any thoughts on whether this is correct chaps? maybe they meant it can't be reprofiled without building it up first 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted October 14, 2015 Share Posted October 14, 2015 if the base circle is really small and you grind more lift into it it fucks with the ramp profiles so they might be garbo in that sense. in which case the 6cyl would be in the same boat. but maybe with the 6cyl there are lots of aftermarket cams with the same base circle but larger nose. also possible two of the cams on the v12 might spin the opposite way if one cam is driven with a gear off the other. Quote Link to comment Share on other sites More sharing options...
MAC_HATER Posted October 14, 2015 Share Posted October 14, 2015 With those V12's it will possibly have really wimpy cams in it as it is - to keep it "coin balance" smooth while running, that was the highest priority for those engines, maybe its a case of not being able to grind whats there as there is not much there in the first place? I am keen to know the actual reason for that though, im just repeating stuff I have heard from others, it could be total cobblers haha Quote Link to comment Share on other sites More sharing options...
westy Posted October 14, 2015 Share Posted October 14, 2015 Something I hadn't thought of to be honest. They are definitely a slug tuned thing. I'll have to see if he remembers anything from what ever conversation he had with them. Testament, they're a SOHC so no worries there. Quote Link to comment Share on other sites More sharing options...
glen Posted October 14, 2015 Share Posted October 14, 2015 you can get some aftermarket cams https://store.vacmotorsports.com/schrick---m70-camshaft-set-p1113.aspx Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted October 14, 2015 Author Share Posted October 14, 2015 No idea on the 850i cams sorry. Most probable reason is that it isn't worth their time, really not a whole lot of profit in regrinds (especially when they have to put in a couple hours of work to find or make a profile that will do the job). Kelford don't do a lot of BMW cams so its not like Shrick who has done the development and can pick a master & setup and regrind quickly. It is possible to regrind though, I can't see reduced basecircle being an issue for a mild hot up - it doesn't 'fuck with ramp profiles', the only issue is nose radius & invert radius on flanks get smaller (which ain't an issue on a slipper pad rocker follower like the M20/M70) and you have to have enough free adjustment left on the lash adjusters to set lash to the required clearance. 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted October 14, 2015 Share Posted October 14, 2015 It is possible to regrind though, I can't see reduced basecircle being an issue for a mild hot up - it doesn't 'fuck with ramp profiles', the only issue is nose radius & invert radius on flanks get smaller (which ain't an issue on a slipper pad rocker follower like the M20/M70) and you have to have enough free adjustment left on the lash adjusters to set lash to the required clearance. hah was waiting for you to correct the terminology what about on a bucket/shim direct actuation setup. some people wang on about it on the fiat twincams that regrinds are rubbish because of making the vase circle small or something. I remember you did tell me that it wasnt a real deal or something/cant remember exactly why. I can kinda visulise that if you make the circle smaller the size of the bit dictating the acceleration part of the cam gets smaller and you would lose "resolution" in that section so it would make it would require more accuracy in the grinding process as the diameter/radius gets smaller since 0.1mm (or whatever yours +/- is) difference becomes a bigger % of the total. writing that just makes me think its rubbish full stop because that radius is going to be tiny anyway and the whole thing just goes whack whack valve you be open whack valve you be close. 1 Quote Link to comment Share on other sites More sharing options...
westy Posted October 14, 2015 Share Posted October 14, 2015 No idea on the 850i cams sorry. Most probable reason is that it isn't worth their time, really not a whole lot of profit in regrinds (especially when they have to put in a couple hours of work to find or make a profile that will do the job). Kelford don't do a lot of BMW cams so its not like Shrick who has done the development and can pick a master & setup and regrind quickly. It is possible to regrind though, I can't see reduced basecircle being an issue for a mild hot up - it doesn't 'fuck with ramp profiles', the only issue is nose radius & invert radius on flanks get smaller (which ain't an issue on a slipper pad rocker follower like the M20/M70) and you have to have enough free adjustment left on the lash adjusters to set lash to the required clearance. Thanks for the reply mate. So possible but not worth their time and/or effort? I can understand that. Presumably the same for the M62? Quote Link to comment Share on other sites More sharing options...
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