Need help building a 2.7 m20

[323i-killer]

As in the title need help building an 2.7 m20, I will be keeping the k jet system and using a 731 head. Cheers

[e21Keith]

I had plans to do the same using the forged 324d crank but never progressed. Car coming back from paint and I need to build a engine for it!

[gerrit323]

As a base you need the 122hp 27 6e a type eta block .. plug and play with the 731 head .. if you balance things like cranck conrods ald rework the heads in and outlet ports and put in a mild cam 170hp and a good amount of extra torque is available

Don't use the 129hp 27 6k b block because the pistons used in that type eta are not usable with the 731 head

[323i-killer]

So then it's pretty pointless as I might aswell stick with the 2.3 bottom em as still achieve 170bhp

[323i-killer]

Or would I get more torque by going down the 2.7 route?

[gerrit323]

You will have more torque .. thats all .. if you want more power like 200hp or so you need to go the l jet route and use the 129hp block with 885 head .. i did that in my ex e30 and had 204hp and 278nm torque

[323i-killer]

Oh right any chance of gaining 200bhp with the k jetronic?

[gerrit323]

Don't think so .. the K-jet itself is the main bottleneck .. you can use the 129hp version and the 885 head with the e21 323i intake and k-jet but the diameter of the intake tubes are smaller than the inlet ports from the 885 head .. so you already lose some capacity at that point also

[323i-killer]

I think by using the porsche k jet bits and Merc injectors 200bhp can be achieved