Evo3 engine blueprints

Hi, as subject suggests, does anyone have these?

Cheers!

Well, its just a thought, engine is comming out.

It isn't modifying I guess. I want to keep it standard, so it just as well be built the best it can be with blueprinting and ballancing. It all depends on what BMW's machining was like in 1990!

It may give the power BMW quotes if this was done???

I have just built an S14 2.5, very close to Group A spec (320bhp) and I used all new parts, from BMW, on the bottom end. The crank was brand new and already balanced from the factory but when I had it checked it was a mile out.

I gave the crank, flywheel and clutch to my engineering shop to have the crank knife edged and all the components balanced as a complete unit. They took 2kg off the crank and the middle journal is now about half the size of the others in order to get it balanced. When I questioned it, he said most of the BMW cranks he balances are way off even though they do have the drill holes in the journels where the factory has supposedly balanced them.

So don't take it for granted you can just bolt everything together and it will be spot on !!! 

Thanks for all your advice, I understand that these engines are superb, last miles, and can handle abuse even with well over 150,000 miles.

For the cost of ballancing (not alot) I would have thought it would be worth having it checked, and ballanced up with all other components connected. eg flywheel, clutch cover, pulley, etc. I wouldn't have thought BMW would have done this to every single crank,pulley,flywheel, etc all fitted together. If it was a ford CVH engine back in 1990, to blue print the block you could take upto 40thou off it to get it to the exact blueprint. The combustion chambers too were wildly out. The ballancing wasn't too briliant either. An XR2 from Ford in 1986 produced 96BHP. When ballanced and bluprinted 115BHP was common, even more with some miles on it. A fully ballance and blueprinted CVH engine is actually a cracking little screamer, but don't over rev them! 

I know the S14 wasn't built by Ford, but I wondered if anyone has taken time to take a close look at one of these engines and decided that it would benefit with some blueprinting and ballancing.

As I'm stripping my engine, I thought I would take a close look at it while its apart. I am keeping the car so I feel it would be worth a look. I just want the car as best it can be.

So..if anyone can supply me with some blueprints, please PM me.

Is the block supposed to be black?

I have known people take cranks, etc for ballancing and had them returned "untouched". I have no idea if thats because they were ok, or whether they just charged for it and not done it (Ah! he wont notice, its only a road engine!)???? Unfortunately, there are people like that out there.

If I get it ballanced, it would be nice to get it done upto the 9500-10000 RPM, even though it won't go that far up the range, if its being done, it may as well be done to that RPM. Saying that, if its fully ballanced at 9500 RPM, would it be ballanced at say 7800RPM? I just had in mind a wheel which has lost its ballance weight. Its ok at 40MPH, but at 70 the wheel shakes, but at 80 the wheels have no shaking. Would the same apply to engine ballancing? I can now feel you all thinking about that one.

Ultimately, I want to keep the engine standard, or to a blueprint/ballanced spec. I have thought about cams, slight porting/gas flowing, upping the compression ratio, lightening the flywheel, etc, etc, but this takes it away from being standard.

The aim is to build a cracking engine which will produce what it should and how BMW intended. I could just chuck a 2.5 crank in and be done with it. But that 'aint me. We'll see

Thank you Uwe!  

Is there a tolerance in this?

Thanks