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

[Graham]

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

right we've had another go at this

i'll make the excuses first

we need to bare in mind im using last years exhaust manifold and system so thats a 2.5 system attached to a pinto ashley 3 piece, which im pretty sure must be holding the engine back, the cams are pretty mild, 292 degree inlet/284 exhaust as opposed to the m10's 336/328 and the impromptu head gasket change has cost me about .5 of a ratio,

although i never said on here i figured the best i was likely to see before the headgasket issue was 270-280 bhp, less than 250 would of been disspointing.

in the final throws i sacrifised 8lbft of torque for a healthy gain of 20 something bhp at the top end, partly because i wanted it to rev better and partly because of the fuel stand off issues (we got less stand off with short trumpets not to mention trying to package the induction system under the bonnet!

i seem to of lost the engine power graph fortunatly i also got dave to do a comparision against the m10

the old addage that 8v motors make more lowdown power than 16v clearly doesnt apply here the 16v ha beaten the m10 by a good margin everywhere even if you take into account the s14 is 100cc bigger


so here we are,l for now scores on the doors are 274.6bhp 235.6 lbft

[Group4_Mark2]

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

That is very impressive. With a proper exhaust manifold and 3" system I would think you might get up to 300bhp. I presume you got the cooling system sorted out with the gasket change.

[RWD fords rule]

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

That is an excellent result! and even more so on a tight budget with the ashley manifold, I am now well and truly convinced the ashley manifold can do the buisness on any pinto, perhaps the primaries are actually a size too big for a 2.0 8 valve.

Was the extra 20 bhp+ mostly due to the shorter inlet length or was it a few things that added up to that bhp difference, cam timing etc?

All that porting made a massive difference, would love to see what you could do to a 2.5 duratec! millington beater lol

[Graham]

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

we ran out of time so the we never touched the cam timing, so apart from timing and fueling we only played with induction length, best torque came with a length of 330mm from head face and that was 243lbft @3500, the engine didnt want longer, neither did it seem to want shorter as we tried using varyed trumpet lengths much as 100mm shorter and it didnt like it,

when i turned up for the second session i'd blagged some even shorter trumpets than the short ones we had already tried and had put them on when i had the head off, dave said they wouldnt work on the basis we had tried shorter but on the basis they were on the car we ran it up anyway, torque dropped from 243lb down to about 225, but power at the top end went from 257 to 264 and that was on the same map so no optomising to suit the length had been done.

as a rally car i've no doubt long would of been the way to go, but as a circuit car i wanted topend power, being pi$$ed off with passing mi16 pugs in the slow stuff only top have them sail past on the fast stuff, and in anycase we were massively up on the 8v which ever way you look at it, i grabbed the calculator and realised on the long length were were making 93lbft per litre and doubted any further mapping was going to improve that, dave agreed with me so on the basis of more topend power, ease of getting stuff under the bonnet, the much reduced fuel stand off on the short length and probably being able to map out some of the torque loss we went with really short.


i have switchable maps in the ecu, so idealy we should do a long and short trumpet map round somewhere like lydden i can pop the long ones in, i guess what i really need is a variable length intake system ecu controlled, then all i've got to do is fit a 3 inch bore exhaust with an exup valve in the exhaust

something else i've learned, most trumpets look fast but the shapes are actually wrong! i've edited this as i go along so i dont give away stuff that emerald are secretly working on, but i can deffo say mr weber knew a thing or two!

the duratecs an intersting comparision! karl wandered in whilst dave was doing a power run looked at the results and commented this motor would murder most duratecs! 275bhp isnt hard to get from one, but not at 6700!

me i cant wait to drive it, niether can i wait to start on the next evolution put some big valves in it, 320 degree cams irecon i can have 350bhp @8k anyone want to lend me some dosh lol

[david_white]

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

Well done, thats a really stonking result, especially as you knew the cams were a bit too mild and the exhaust less than ideal. Gonna be a hell of a lot of fun to drive, thats for sure.
Cant wait to see this new intake system, when is Dave going public with it?

I have a 3" system that would fit but you might need a quieter back box, but I guess there is no point doing it until you can get a manifold.

Are you gonna get to Brands still?

[Graham]

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

intake wise there wont be anything special to see on mine, what dave upto isnt particulary trick but wont arf help setting up engines for optimum.

ATM no plans to make further changes to car or engine, tractions going to be an issue as the 8v was lacking traction out of clearways and graham hill, my current plan is to concentrate on the new shell, assuming all is still well with it i'l put the current engine in the new shell with an exhaust suitable for wilder cams and race that in 2012, with an evolution engine in 2013

the plan is to be at brands got a ton of stuff to do first though and no time off!

[RWD fords rule]

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

the duratecs an intersting comparision! karl wandered in whilst dave was doing a power run looked at the results and commented this motor would murder most duratecs! 275bhp isnt hard to get from one, but not at 6700!

me i cant wait to drive it, niether can i wait to start on the next evolution put some big valves in it, 320 degree cams irecon i can have 350bhp @8k anyone want to lend me some dosh lol

Yeah that is a very good point, very low rpm for that bhp level, can't wait to see it in action, and the evo 2 will be insane!

[exboyracer]

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

That graph looks pretty good Graham, well done and good luck with the rest of the work needed on the car !

[caprimentle]

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

blinding result, well done graham now go out and bloody enjoy it some

[jchasey]

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

So you coming out to play in the Intermarques this year Graham or sticking to the DMN ??
John

[Graham]

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

bit of both depending on £££££££££

[stephen bahr]

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

bit of both depending on £££££££££

9 quid? i can help

[Roadsport]

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

9 quid? I can help :d

good one

[Toymex]

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

Good luck for the weekend Graham,it will be interesting to hear how the new engine compares to the 8v and how the lap times are

[Graham]

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

cheers although im still working on it, doing lots of 11th hour jobs, including finding the bonnet doesnt fit!!!!!!!!!!!!!!!!!