m44/m42 spec rally engine

[sh123]

so here is the graph. 167bhp and 161ft-lbs

ive given it a quick blast earlier today and im very happy. now ive driven id say its pretty much what I was expecting.

I think with itbs and abit more of a aggressive cam (not much as the torque is fantastic) it should be a brilliant engine.

And it sounds fantastic inside!! and with the e36 box and 4.45 diff it gets to 100mph in absalutly no time at all!! quite scary really!

[Warsteiner]

Hey Sion,

Great that you finally got it tuned!!  Are those numbers actual power or rear wheel power?

Maybe you could post your complete build here again? Crank, rods, valves, cams, etc...

Cheers,
~Ralph

[Darky]

Hey Sion what cams are you using?

[sh123]

I havent spoken to the guy that mapped as I/family run a breakdown recovery company and one of our drivers was passing sohe picked the car for me. so im abit confused with the graph but I would have thought the figures were at the flywheel. the bottom table shows lower figures of around 130bhp. not sure on torque.

itcurrently has these regrinds http://www.kentcams.com/product-details/98/Camshaft/Camshaft/BM48-Sports-Injection/

[Darky]

From what I have seen of your build I would say that's at the wheels!

[sh123]

thinking down the line here...

what sort of power increase would I be looking at when I fit ITBs to this engine? and possibly with a different spec cam

such as second cam down http://www.catcams.co.uk/acatalog/BMW_318iS__318ti__Z3__138hp_.html

First event for the engine in three weeks time. running like a dream at the moment! very impressed.

[lambertius]

thinking down the line here...

what sort of power increase would I be looking at when I fit ITBs to this engine? and possibly with a different spec cam

such as second cam down http://www.catcams.co.uk/acatalog/BMW_318iS__318ti__Z3__138hp_.html

First event for the engine in three weeks time. running like a dream at the moment! very impressed.

I can't say an exact number, but I would guess quite a bit. The E36 manifold seems to get restrictive around the ~4000 RPM mark, which even on your dyno is the point that curve becomes less steep. I would hazard a guess that if you were to match your build with a decent intake plenum volume  you could probably just extend the power curve up in a straight line to 6000RPM. If you're pedantic about getting everything right you could probably do it without losing anything below 4000RPM, but I reckon realistically you'll probably trade 4~5% down low for 5~10% up top on a decent setup. On my stock internals setup the ITBs scaled up by ~22% in some places, and 16% peak power being pedantic about EVERY detail. I'm not sure how that would translate to a modified engine though, but I imagine it would be similar with a good tune.

[sh123]

so did the first event with the new engine over the weekend. ran like a dream!

It pulls very well! barely feel anything when coming to hills.

few small issues though, (not engine related) have a noisy gearbox, handbrake was awful and I need to do a few adjustments to the suspension.

[sh123]

not posted on my topic for a while.

nothing much has changed to the engine, its been stripped once as it was leaking, seal between the head and rear bottom timing cover, due to the large headgasket theseal was abit to thin. so the only thing we  could think of was rhoderseal under and above the seal. (not ideal) but it has worked!!

Now I have a leak from the oil filter housing. 

Also the car is fitted with a 5.43:1 read diff. it is insanely quick!! ok it will only do around 90mph max but its all i need.

what would you guys recommend to run as spark plugs?

....have also been offered solid lifters and a set of cams.....

[sh123]

Hi

Just thought i'd update my thread.

So around 2 weeks ago. I did my last event in this 8th overall out of about 85 starters so was very happy.

But on monday after the weekend i had a guy come to look at it.

So the car has now been sold. And ive moved onto a vw golf mk2 with a 2.0 16v engine which will be getting the same treatment as the bmw had 

[jerseytim]

its a shame you sold it, what are you going to do with the other shell?

[sh123]

it is a shame, it was a good car. Ive been curious about front wheel drive however.

the shell is in storage for when i come across a  cheap enough m3 engine engine (euro s50/2 hybrid)