2.7L stroker power

[bmwmike]

I know it can be tough to get a lot of power from the stock 6 but if you built up a 2.7L stroker with everything from the stroker kit obviously and pistons to head work, intake manifold, headers, exhaust, intake, chip, cams etc, how much power on pump gas do you think would be possible. Anywhere near 300? And what kind of torque do the strokers make?

[Rob]

nowhere near 300, sorry. 200hp is a more reasonable goal. These are crank HP figures, not wheel

[bmwmike]

of course i do mean crank hp, but it couldnt do 100 hp/liter?

[Mystikal]

Feels like Bfc.

And no, what Rob said was right. There are also numerous resources, search on here, and Google it.

[Jon325i]

You want 100hp per liter? Think about turbocharging your current motor or dropping in a modified S14. The mods you mentioned won't get anywhere near your goal output.

Do a search on the stroker topic. It has been discussed a great lengths here.

Jon

[BimmerToad]

Sort of ridiculous compression ratios (i.e. not running anything near pump gas) or a huge pocketbook, you're probably not going to achieve the magical 100hp/liter. You're much better off starting out with a 4 valve per cylinder head.

Seach the boards. There was a thread a few weeks ago about a dyno day in the UK in which a lot of different modifications to the M20 were tested. Some power outputs were downright depressing, given the money and work put into some of the stroker engines. :(

If you're going the stroker route, be sure to do a MAF conversion. While I haven't done it, (or have an M20 for that matter) it seems like a fairly substantial bottle neck in an increased displacement M20.

[nando]

you could get more power by ditching the AFM and using either a piggyback computer or stand alone engine management. Dave's 3.0l stroker was low on power for what he spent, but he was using the stock ecu/chip, an AFM and some other stupid things (like 19# injectors and AFPR with no software to back it up). ditching the AFM opens up a lot of torque.. I think you'd be better off trying to build a torquey stroker rather than going for HP. chris (from malaysia) has something like 220ft-lbs (to the wheels?).. which is pretty ballsy for an M20 (his is 3.0l though).

but if you're doing a stroker on a budget (stock ecu, afm etc), you're only going to gain 20-25hp at the most over a stock 2.5l.. you'll gain a bit of torque though.

[Chris E30 Cab]

My 3.0L is getting 187rwhp & 207rwtq......215hp & 238ft-lbs using 15% correction.

The torque is fabulous and even so on a 2.7L stroker. I don' t have the numbers on my friends 2.7L stroker but I recall they are appx 165rwhp & 170rwtq. Even Alpina & Hartge only got appx 210Hp out of their 2.7L stroker.........which in my opinion is plenty to have a VERY enjoyable E30. Even my friends with 165rwhp is a blast with all that torque.

300Hp is not very realistic. Another friend has the most powerful street legal N/A M20 (3.0L stroker) that I know of and is getting 212rwhp & 203rwtq and he has a Stage II head among other extensive engine mods, including proper tuning w/ a piggyback unit. But I'll say it again, the 2.7L produces enough power to have a VERY enjoyable E30. Just make sure you use a piggyback to tune the engine properly.............Good Luck!!