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

[david_white]

Re: A race bmw 316, now S14 powered again!

Nice porting, makes a change to start with a pretty well ported head eh?

[Graham]

Re: A race bmw 316, now S14 powered again!










some obligatory porting pics, fortunatly this time i've started with a big port head so it doesnt need hours and hours of grinding, like a yb or teh small port heads, the ports have been opened a couple of mm, most of the work has gone into opening out the manifold face to suit the slide throttles. bottom pic shows a hole in the port where i broke through, fortunately its only into a manifold bolt hole so of no consequence, tbh i was half expecting to break through there because i did on the last head i did

[stephen bahr]

Re: A race bmw 316, now S14 powered again!

no much more, the engines more upright

ah thick moment, thought it was leaning the other way!

EDIT: just a thought, something similar to the turbo manifold you had, i think it was volvo, the very nice shiny one, something like that, engineer it to fit the head?

[Graham]

Re: A race bmw 316, now S14 powered again!

so do you now have even less room exhaust side to play with a manifold?

no much more, the engines more upright

[exboyracer]

Re: A race bmw 316, now S14 powered again!

Nice save there

[stephen bahr]

Re: A race bmw 316, now S14 powered again!

so do you now have even less room exhaust side to play with a manifold?

[Graham]

Re: A race bmw 316, now S14 powered again!

the engine now sits with the sump level, not tipped up so it is indeed sitting around 17 degrees, the gearbox wont care about the angle, although filling it with oil to the filer plug will now give the wrong level inside, the only difficulty i predict is fabricating a new gearlinkage

[dsm2002]

Re: A race bmw 316, now S14 powered again!

Graham

what angle do you reckon your engine is now at? From memory you had the chevron style sump for 17º. Do see any issue with the gearbox also being rotated? [I'm looking at a similar issue for extractors for a M42]

[Graham]

Re: A race bmw 316, now S14 powered again!



a little more progress, heads back from being welded and having new inserts, need to port it now, although the machine shop advised me to be very gentle in one area of the throat because it was actually holed through to the water jacket

[Pushrod King]

Re: A race bmw 316, now S14 powered again!

Talk to Matt Simpson.

[Roadsport]

Re: A race bmw 316, now S14 powered again!

Making one your self is a good way of getting everything to fit. 4-2-1 "merge" collectors are propably easier to do than 4-1. I used a pre fabricated collector. I know I should try a 4-2-1 myself but as for now I can bring my self to do it but maybe when the snow melts.

[Graham]

Re: A race bmw 316, now S14 powered again!

Do they make a pino manifold with 2" primaries ?
.

nope they make s14 manifolds with 2 inch primaries for eye watering amounts of cash, even then they are for lhd so no use to me, i dont mind cutting up ashley pinto manifolds, but buying a bmw one for a 4 figure sum and cutting that will take balls lol! so i guess i will have to make one just like you did

[Roadsport]

Re: A race bmw 316, now S14 powered again!

Do they make a pino manifold with 2" primaries ?

Well the CR is a big improvement and the improved rod angle is a bonus. Both in the right direction. Only two degrees? I guess thats the down side of the long throw crank.

[Graham]

Re: A race bmw 316, now S14 powered again!

incidentally Friday i ordered the new 148mm rods, tbh i dont see a 4mm change in rod length making a dramatic difference to the engine, other than the cr will go up, yeah i know the crank postiition/rod angle improves, but having got all technical with pens, paper and a protractor with the crank at 90 degrees the difference in rod angle is a mere 2 degrees

[Graham]

Re: A race bmw 316, now S14 powered again!

space may yet dictate which design it its but it will either be a 4 into 1 or a 4,2,1 using very short secondaries, something these engines seem to favor, the real issue is space because it wants 2 inch primaries!