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

[exboyracer]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Feck me that port is huge!
Nice work Graham

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

the downdraft shape of the port and therefore angled manifold face makes the port look bigger than it really is its actually 34mm and feeds a 37mm valve so the port is now almost 92 % of the valve dia, although it does taper down smaller as you get closer to the valve

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

no more progress as such, i've been searching more camshaft option most options involve lots of cash which i dont have,

i talked to cat cams earlier but when we got into 4 figure sums it ruled them out the equation, the cams themselves are a reasonable price compaired to schrick ones its just all the other stuff to go with them that really hurts

cheapest is obviously use what i have and deffo be stuck at about 250bhp and have a major problem with too much compression

reprofiling is the next cheapest option, but thats going to leave me short on lift and timing particulary if they keep the valve acceration down to avoid risking flicking a shim out.

next option is to buy 1 schrick cam and use the group N inlet in the exhaust, the question is whether to err on the side of caution with the 284 which wouldnt flick a shim or the 292 which is slightly less safe,

although its a faff to do i can convert to top hat shim for about £300, if i do that theres deffo no money for schrick cams,

the way im heading now is to convert the shim type and get cams reprofiled, with top hat shims kent can be agressive as they like on the valve acceration so i can probably get decent lift and timing, nothing like as much as with either the cat or schrick cams but its should give reasonable power and no danger of a topend blow up

decisions decisions.......................

[Tristan]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

What diameter are the buckets?

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

37.5mm

[Tristan]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

by any chance would VW or similar cars be the same? Some of the M42/44 guys use VW buckets AFAIK.

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

i dunno if vw buckets are the same size but i do know they have the same shim arrangement, i.e the shim sits in the top of the bucket, which is what im trying to get away from

[e21jason]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Some guys use Volvo shims as they are cheaper than BMW you would have to dig through s14.net to find the info, and if you look on ebay.com there are a few sets of the supertech sim under bucket sets, also a Finnish guy done some work replacing the rubber mounting blocks with alloy so you can blend the ports to the throttle bodies and found a few more ponies

Jason

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

yes i think i've used volvo shims before, i've also got a set of e36 buckets and shims which are lighter, i've since given thoughts to using alloy to replace the throttle body rubbers but right now have a more pressing problem in that i hit a waterway when opening up the rest of the head to match the high flowing port so i now need to find another head

[Pushrod King]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Can't the hole be welded Graham?

[dangerousdave]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Bad news i guess its probably cheaper to get another than to get it fixed? Julian Godfrey fixed my mates yb head that was smashed by a valve dropping its head on the motorway but it all comes down to £££ at the end of the day, his was £3k for the headwork so it was worth him getting it fixed!

[mervhill]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Ah no way mate! That's a total bastard! Ah well at least you'll know what the limits are for the next one eh?

[caprimentle]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Can't the hole be welded Graham?

agree, surely it could be welded, friend of mine has an ally welder, its the only welding i've never personally tried but cant see why it couldn't be welded.

[Graham]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

Can't the hole be welded Graham?

maybe we actually broke through in 3 places! two went in to an area of the head that can easily be repaired/filled and i knew there was a chance of it happening but wasnt overly worried, the waterway hole was a real bummer though because its going to be dammed hard to get a tig to it and it means that port will have to stay smaller then the rest.

[Pushrod King]

Re: A race bmw 316, 240bhp Atmo M10 now going s14 power!

maybe we actually broke through in 3 places! two went in to an area of the head that can easily be repaired/filled and i knew there was a chance of it happening but wasnt overly worried, the waterway hole was a real bummer though because its going to be dammed hard to get a tig to it.

I Know a man who can