Performance related ?????

[new2bmw]

i have an 84 318i M10 and was wondering if some parts from a 1972 2002tii would help me? i know the crank is for sale, should i buy that? can anybody let me know of any other parts to think about buying? thanks guys

[petrolhead]

Crankshaft - yes , buy it. It's steel , w/ 80mm stroke. Versus 71mm stroke , cast piece of s..t in E30s.
You'll need ~42mm compression height pistons with that crank (1,8i pistons are 47,x mm).

Block , if thats available , BUY ONE. Those old blocks are much more durable than "new" blocks. (any M10 block cast before 1979 for that matter). Won't crack if bored to a wild oversize, and/or turboed.

Flywheel on a Tii , should be steel not cast , so it'll be safe to have it lightened and balanced and Revved :). It can take the bigger 228mm clutch.

Long story short , if a complete Tii engine is available , buy it and throw the M10B18L to the bottom of a nearby lake. I'm building a 2 litre with Tii pistons and 121TI head, inlet manifold+injection stuff coming from an E30 318i. Feel free to PM me if you have any questions. I bought a complete car to get my hands on and "old" M10 , and still think it was a good deal.

BR , Jarno.

[Hey_You]

Use the 318i head, it flows better (from what I have read). Use the Tii crank and pistons and put them in your block (unless you feel like fabricating your own engine mounts) as the old m10 blocks have a different passenger side mount setup that won't work with a 318i. If you use the Tii head, you have to use the old distributor as well (which won't work well with L-Jet) as the old distributors spun the opposite direction in relation to the camshaft

[Deadskittles]

Speaking of fitment issues, will the e21/e28 m10b20 fit in the e30 without a problem?

[petrolhead]

Use the 318i head, it flows better (from what I have read).

Compare any "M10" heads with big ports. Put them on the table and see for yourself. I have.

Use the Tii crank and pistons and put them in your block (unless you feel like fabricating your own engine mounts) as the old m10 blocks have a different passenger side mount setup that won't work with a 318i.

Making or having them made isn't rocket science. Absolutely_worth_it , for being able to use an old block.

If you use the Tii head, you have to use the old distributor as well (which won't work well with L-Jet) as the old distributors spun the opposite direction in relation to the camshaft

using the 1,8i head you'll be losing out on squish and compression. Both are very important for M10 to make good power . And isn't the head able to spin a "new" type distributor once you change the camshaft :)

[Hey_You]

Sure is, but the only place I'm familiar with that sells cams for the 318i is Schrick, and for one...I'm not willing to spend $500+ for a cam on a m10. In the OP's other thread, he was talking about boosting his m10 in the future, so makes more sense to lose squish and compression.

[Holland]

Let's not forget some were single row timing chain and others were dual row.

[Hey_You]

^---Yes! Old m10 is double row, new'er m10 are single row. Easy to change over though, as all you really need to do it change the cam gear. Crank can remain the same, and just not use the outter row.

[petrolhead]

Sure is, but the only place I'm familiar with that sells cams for the 318i is Schrick, and for one...I'm not willing to spend $500+ for a cam on a m10.

A good performance cam costs about that. But if one is settling on a stock cam , look one up on ebay that spins the distributor the way that is needed. Not that expensive.

In the OP's other thread, he was talking about boosting his m10 in the future, so makes more sense to lose squish and compression.

Alright , all the more reason to get a block that won't crack.

[Hey_You]

A good performance cam costs about that. But if one is settling on a stock cam , look one up on ebay that spins the distributor the way that is needed. Not that expensive.

Even cheaper if he uses his cam he has already? No need to have extras

[petrolhead]

Even cheaper if he uses his cam he has already? No need to have extras

You talk about selecting a head that "you've read" flows better, but at the same time don't think it's worthwhile even replacing a reasonably cheap cam , while building a turbo engine? Probably leave valvesprings untouched while you're at it?
Well , I've seen a bunch of these. Turbo to stock , unopened engine and see what it makes/how long it lasts.. This discussion is leading nowhere since the original poster hasn't replied with anything.

[Hey_You]

It's a stock cam, why replace it with another stock cam? I just said I wasn't willing to spend $500 on a 318i m10 cam. I won't be using a distributor, so I have some other options. But hey, I might even leave the stock cam in it just to prove that power can be made with the stocker. I'm using a dual valve spring setup, and my engine has been completely opened up and refreshed. The OP was wondering what parts from a Tii would help him. Sure, get the cam out of it, but have fun making it work with his distributor.