ITB's

[Muzz2676]

I was going to put a m54b30 in my e30 however i'm thinking now of staying period and sticking a m20b25 in it with ITB's as they sound great.

My car has 85k on the clock but as it's a 320i more door i'm assuming a non original engine isn't going to effect the value?

Is this a good idea, and is there any zone approved places to buy ITB's from when the time come?

[flybynite]

Don't get me wrong I am a big fan of originality but costs come into play. Getting an M20 up to the power of an M54B30 will be expensive.

Are you buying a B25 or converting your B20?

A B20 moredoor is one of the cars at current prices will not make a huge difference what you put in it, give it time it may. You could keep your original engine to sort that issue.

ITBs, there are Dbilas and RHD. I don't have experience of either but I have heard the RHD are better (and priced accordingly) You would really need a B27, B28 or B29 to make the most of the ITBs and the run a standalone management. That is a lot of work and cost to get to the output of a M54. N/A gains are hard to come by.

It would sound great and be period correct, I would love to build one like this but I am already into an expensive B27 and for my other E30 a M54B30 is a cost effective solution, especially as I have a 330i already.

You will likely not recover your costs no matter what you do so do what takes your fancy

[reggid]

RHD are the only ITB worth getting for the M20 IMO unless you want something purely cosmetic. While you are swapping in a new engine it would be madness to keep it a 2.5L when you can relatively easily do a 2.7/2.8/2.9.

Be aware you basically need to run a standalone ECU as well.