A race bmw 316, m10, s14, m20, turbo, na, its been the lot!

[Graham]

Re: worlds most powerfull bmw 316?

£500 sounds a lot for a head in a world awash with pinto's and Yb's, but dont forget 4 cyl M3 engines are rare and its not often that you will find a complete ( with cam carrier, cams, buckets, shims etc) good head which isnt still attached to the rest of an engine with a £1500 plus price tag, bare heads will make over £200,

you cant get pattern valves they are listed but not avaliable, from bmw the valves are £73 each! but the head uses oversize valves so they are not suitable anyway, i could use a valve from a 3.8 m5 engine which would fit straight in, last time i checked they were £172 each!!!!!!

its as much about time and machining costs as anything, finding suitable valves isnt easy, they have small stems, are very long and have unusually large heads for a 16v motor leaving very few options, i will look into other valves though, but it might just make more sense to put the current head to one side and wait for the right valves to become avaliable again ( which are sensably priced when my supplier gets batches made), and for now put it back together with another head

[Pushrod King]

Re: worlds most powerfull bmw 316?

Any developements Graham??

[Graham]

Re: worlds most powerfull bmw 316?

head off and the exhaust valves are very bent!

[Graham]

Re: worlds most powerfull bmw 316?

i've sourced another head, with a view to fitting that to get me back on track, although in the end i've just nicked the exhaust valves from it, as they will just seat on my origonal head, the reason for swapping valves rather than whole heads being that it saves swapping the manifold adapters over, needing to get a head refaced, and it haved the amount of work as i wont have to reshim the inlet valves, fitting the new would of probably dropped the power unless i sent a couple of days porting it to match the old head, the inlets in the new head being considerably smaller

[Graham]

Re: worlds most powerfull bmw 316?

after lapping in the exhaust valves to the head i realised i would have a problem with them being too long due to the head having been skimmed on both sides and the valve seats recut several times, which i recond would leave the valves at least 20 thou too long or in other words give me no tappet clearance at all, and i dont have shims going thin enough to get it either, they need shortening, unfortunatly you cant shorten valves on my valve refacing machine, so that usually means at least a couple of journys to a local engine reconditioner timming bits off and rechecking the lengths before trimming more off, a pain and time consuming and not something i can do over the weekend, after a couple of hours of thinking off and on i had the answer, the lathe, mounting a grinding stone in the chuck and a valve guide in the tool post i found i could accuratly shorten valves, and for free!

[Dave]

Re: worlds most powerfull bmw 316?

Fair play to you Graham, keep at it
Hope you are back out there soon.

[carpmart]

Re: worlds most powerfull bmw 316?

Good solution that Graham! Just goes to show that the best things in life really are free!

[david_white]

Re: worlds most powerfull bmw 316?

How fooked were those valves?!

Good to see you've come up with a clever solution , will you still be missing snett or will you get in still?

[Retromotorsport]

Re: worlds most powerfull bmw 316?

Glad to see its coming together Graham, and that man who helped out, give him a pat on the back from me, just shows what a championship the DMN is ..

One thing though, thouroughly clean down the lathe after using a stone in there, its best to lift the tool trolley right off as you get bits of stone under there and it works like grinding paste on the bed.
We've got a lathe here that used to sit next to some blast cabinets, its a bit worn now ...

[Graham]

Re: worlds most powerfull bmw 316?

, will you still be missing snett or will you get in still?

lets just say i havnt pulled my entry yet

[Graham]

Re: worlds most powerfull bmw 316?

quick update, its back together and running, with a just a couple of hours to spare.

just got to see it it will hold together, as it went to beyone conrod snapping rpm one could let go the first time i rev it hard

[david_white]

Re: worlds most powerfull bmw 316?

Good luck for the weekend then Graham, well done for getting it fixed.

Lets hope everyones engines stay in one piece this weekend, always a bit worse with a straight like snett's pray:

[SnappyRacers]

Re: worlds most powerfull bmw 316?

Well I hope the photos for Ferriday helped Graham. I know the same feeling when somethign you need goes bandy and you just see £ signs... My camera went a few weeks back and I instantly new my pocket was going to be £700 lighter.

Great to know you've got it back out. Unfortunately I won't be at Snett as it's frankly a bloody long way! And I don't like getting wet.

JB

[andypipe]

Re: worlds most powerfull bmw 316?

Well I hope the photos for Ferriday helped Graham. I know the same feeling when somethign you need goes bandy and you just see £ signs... My camera went a few weeks back and I instantly new my pocket was going to be £700 lighter.

Great to know you've got it back out. Unfortunately I won't be at Snett as it's frankly a bloody long way! And I don't like getting wet.

JB

Poofter

[Dave]

Re: worlds most powerfull bmw 316?

Best of luck Graham.