M20 B3x Naturally Aspirated Stroker build past, present and future

[ForcedFirebird]

nice car mate

http://i110.photobucket.com/albums/n120/diggerdigger/P1000489-Copy_zps53d44679.jpg

I see your lambda sensor is very far from engine as It is on my car, does you have issues with sensor working propertly, or it works fine?

Won't bother it being that far. When we tune cars on the syno, the wide band is clipped to the tail pipe. I have noticed it causes the AFR reading to be about 300rpm off when making adjustments.

[abit]

nice car mate

http://i110.photobucket.com/albums/n120/diggerdigger/P1000489-Copy_zps53d44679.jpg

I see your lambda sensor is very far from engine as It is on my car, does you have issues with sensor working propertly, or it works fine?

[2mAn]

Car looks great :up:

x2.

This whole thing has me wanting to do some major research before I build a better exhaust system for my car.

Love this thread.

[tinkerputzer]

Car looks great :up:

[digger]

had a few issues shall we say that have been keeping me busy. here are a couple happy snaps

[The Dark Side of Will]

Wow, I wouldn't have expected x-pipe placement to make such a difference.

Correct collector length and termination is extremely important. Since an X-pipe creates an impedance change that terminates the collector, X-pipe placement determines collector length and as such can have a very significant impact.

[nando]

Its all stock parts except for pistons, the life of the engine isn'treally affected.

[QuiqueUy]

thats amazing , great work! i was wondering how's the relability of the engine by stroking it to 3.1 since i don't know about this and in my country no one has done it because this factor that we don't know :p the life of the engine might be lower right? keep up the amazing work!

[digger]

hit an unrelated "snag", will reveal more when i am able

[Nutzy]

Yah man, post some dyno vids or something!

[LJ851]

How is this progressing, digger ?

[Mfever]

Any sound clips of new exhaust?? Looks pretty damn badass!

[digger]

it was simply too short/close for the rpm i was using.

[CorvallisBMW]

Wow, I wouldn't have expected x-pipe placement to make such a difference.

[digger]

i have moved the X-pipe from 4th to 3rd harmonic and it seems a positive move.

The AFR or timing has not been adjusted at all and you can see that the engine runs alot leaner in parts now and make alot more power in midrange as i was hoping and no loss of topend hp.

i will get it properly tuned in the next couple of weeks and will update as i imagine there will be some additional gains from a tune



im not sure why the operator ran it from such a low rpm but 100km/h is 3400rpm so the peak torque is 220twq 4200rpm give or take and hp 224whp 6100rpm