high lift cams??

[_bmw_316_lad_]

hi all my cam is fooked on my 316i and was thinking if i put a high lift cam instead of a standered one.. any one no where a place to get em in ireland or even a make which do em,, and do i need to replace the followers to??? im lookin for bit more power froom 2k ta 6500 many thanks

[DaveD]

I am sure Ant is the agent for catcams

http://www.catcams.be/index.htm

the link only works on explorer

[_bmw_316_lad_]

hmm iv checked the website dont seam ta do em for the m40 engines

[BadDave]

Have you considered Piper,Kent cams or Newman cams as an alternative.
I'm pretty sure they'll gring one to suit your specification if they don't have one in there product range

[_bmw_316_lad_]

whats there websites does any1 no?? and if there any dealers in ireland?? always a curse finding places in ireland

[BadDave]

whats there websites does any1 no?? and if there any dealers in ireland?? always a curse finding places in ireland

http://www.newman-cams.com

http://www.pipercams.co.uk

http://www.kentcams.com

Each site has a list of dealer worldwide

[_bmw_316_lad_]

o grand job thanks!!!..

[Bob_S]

i fink u shud fi a biger mota innit

[DanThe]

I think your right Bob

There is a place in Coventry that do pattern M40 cams for about £40 IIRC

[_bmw_316_lad_]

is there reli thats well cheap?? whats the place called and how would i contact them???

[DanThe]

I honestly cant remember, 'something' engine components

[tomson]

There is a place in Coventry that do pattern M40 cams for about £40 IIRC

My local newsagent sell toblerone bars for about £1

[chu346]

i fink u shud fi a biger mota innit

What like a 1.8 turbo

[Bob_S]

i fink u shud fi a biger mota innit

What like a 1.8 turbo

biga mota innit y trbo a 1.8 wen u can trbo a 3.2?

[chu346]

Because a 3.2 turbo will cost loads

[Bob_S]

Because a 3.2 turbo will cost loads

and the point of a 1.8 turbo?

[chu346]

More power than what he's got.

[_bmw_316_lad_]

haha lads im only a young fella yet and im saving for a 325 .. my cam is completly worn just wanting a replacement and thinking of high lift cams

[Alex]

dbilas dynamic do them, £326 notes mind although it says £160 for a re grrind anyone know what is meant by that

[BadDave]

dbilas dynamic do them, £326 notes mind although it says £160 for a re grrind anyone know what is meant by that

Means they grind the new profile from an existing cam rather than from a blank.
Hence why blanks are usually a fair bit more expensive

[Alex]

dbilas dynamic do them, £326 notes mind although it says £160 for a re grrind anyone know what is meant by that

Means they grind the new profile from an existing cam rather than from a blank.
Hence why blanks are usually a fair bit more expensive

can they do this with knackerd cams still?

for example if i supplied them with both cams shafts for an M42 they would re grind what ever condition

[BadDave]

Would depend how bad they were i suppose.

[Alex]

never knew you could do that, might bare that in mind, wouldnt mind putting some tasty cams in mine once i get a job

[ShakeyC]

No you can't regrind from a knackered cam.

I reprofile actually hundreds of cams over the years and you cant add or take away meat from where meat is already worn out from

[Alex]

can you re profile cams yourself then shakey

you could setup a business here

[ShakeyC]

I could i suppose with my new cnc machine but there is other companies out there which i have used to reprofile cams for other people at less cost than it would to set up the tooling to do myself.

[Alex]

ah rite

[GeoffBob]

I thought the tricky part was having the cam surface rehardened after grinding. Don't cam-grinders put the cam through a process of induction hardening after a regrind since softer material is exposed after the harder surface has been ground away?

'Could be wrong, not a process I have ever had to go through myself. Would be interested to hear how its done.

[ShakeyC]

It depends on the type of cam, how different the reprofiling will be and of course what material it is and if it’s a hollow or solid camshaft.

Iron grade 17 is ”˜case hardened’ as I know it aka induction hardened to 56 Rockwell C
SG Iron (spheroidal graphite) 58 C
Chilled Chrome Cast Iron grade 17
Carbon Steel E8 or E9
Alloyed Steel EN351 AISI 8620 and EN34
Nitride Steel EN40B

Each of the above have different methods of reprofiling and hardening based on their original process of construction. For example Alloyed steel can be re-machined the last pass is done at high speed to work harden the outer skin of the lobe then case hardened by quenching it in water whereas carbon steel is quenched in oil. The rocker/follow pads are work and case hardened together, with cam lobe and follower pad these two patches have good resistance to wear.

Chilled chrome cast iron due to it being constructed by pouring molten iron into a mould the outer skin is cooled and forms tough carbide skin these are not easy to reprofile because material is tough further hardening is not needed.

Carbon steel is mostly a forgotten process in favour of SG Iron due to less production costs and higher wear resistance. For top end machines we used Nitride EN40B made in similar way as chilled chrome cast iron cams but the mould would be spun at high speed whilst molten nitride poured in. We used much less nitride in this process as it cooled would form a hollow camshaft that’s just as tough and machined to spec. These are more limited in how far you can reprofile them because hollow construction and rarely done because nature of high end engine its used for the risk isn’t worth it and new ones cost about the same as to reprofile.

Oh the fun i had at the foundry

[GeoffBob]

Thanks for that brilliant answer Shakey! You've really filled in the details for me. I wasn't aware that so many different materials are used to make cams, and that they all require such different treatment.

I guess that one of the most important bits of information to have then, when considering a regrind, is the cam material, since that seems to dictate the process that will be followed during the regrind?

I wasn't even aware that it was possible to spin-cast cams. Now I know.

Thanks again for the info.
Geoff

[ShakeyC]

Most welcome GeoffBob

The Nitride EN40B casting process is very complicated and we only used for very high end motorsport such as F1.

Also worth mentioning for everyone elses benefit is the way the cam is measured it is NOT always the same so beware when looking at qouted lift, duration and overlap figures you can have for example 2 cams both 280 degrees with 8mm lift from 2 different manufacturers and they will not drive the same or give same results but thats a whole different subject matter more towards marketing reasons rather than engineering

[_bmw_316_lad_]

iv done a bit of research now and apparantly the 318m4 cam is the same as the m40 316 only diff is the "crank" wat does this mean any body and cam it be changed to suit???

[ShakeyC]

The standard cam on 316 and 318 is interchangable on the M40, its considered a consumable just same as oil, plugs and filters they wear out and need replacing more frequently than most other engines. Think of it as a ford CVH on RS Turbos they eat cams for breakfast too.

[_bmw_316_lad_]

so basically if i order the one for the 318 m40 engine it will suit the 316 engine without any modifaction ??

[rix313]

Like I said ;)