Hi there

[ludiagsm]

details on your friend's engine, please boost, internals...
thank you

original  pistons , short rods 135mm from m50 ,he grind engine block with 2mm ,1,3mm cometic gasket ,1,7 bar of boost standart motronic without maf ,SMT6 and map sensor with four extrainjectors ,gearbox is from e36 diff is 3,45 lsd

[ose30]

You guys build great cars, but imho you should do the test drives somewhere else than a public roads...

[crazzy_hippo]

You are just one crazy guy who build awesome cars!!

Btw, just a question regarding your 318is. Any plans to stroke it up to 2L using the 88mm diesel crank? Cause I am wonder what combination of pistons and con rods can I use with the 88mm crank. What you have stated seems to be meant for stock crank.

Thanks!

[ludiagsm]

You are just one crazy guy who build awesome cars!!

Btw, just a question regarding your 318is. Any plans to stroke it up to 2L using the 88mm diesel crank? Cause I am wonder what combination of pistons and con rods can I use with the 88mm crank. What you have stated seems to be meant for stock crank.

Thanks!

Hi in this thread http://www.m42club.com/forums/showthread.php?t=6866 has some info.

 It has many diferend ways to build motor with diesel crank , first you must tell: do you  want turbo or natiral aspirated engine ?

[crazzy_hippo]

Hi in this thread http://www.m42club.com/forums/showthread.php?t=6866 has some info.

 It has many diferend ways to build motor with diesel crank , first you must tell: do you  want turbo or natiral aspirated engine ?

Thanks. I have read the link. I am building a turbo motor (supercharged to be exact) and thus looking for parts that is able to run under boost.

[E36Al]

Hi ludiagsm, amazing work you've carried out.
Thanks for sharing your knowledge and experience.
Couple of questions if you wouldnt mind-
Your mates e30, is it utilising two smt6 units, like your setup?
Or perhaps just one piece, controlling extra fuel injectors and timing management, leaving standard injectors alone?

On another note, and thread, id appreciate your input regarding the use of nissan sr20det pistons in 86mm m42.(see recent posts)
Cheers mate

[ludiagsm]

Hi ludiagsm, amazing work you've carried out.
Thanks for sharing your knowledge and experience.
Couple of questions if you wouldnt mind-
Your mates e30, is it utilising two smt6 units, like your setup?
Or perhaps just one piece, controlling extra fuel injectors and timing management, leaving standard injectors alone?

On another note, and thread, id appreciate your input regarding the use of nissan sr20det pistons in 86mm m42.(see recent posts)
Cheers mate

 Hi 10x for good words,
 on my friends  E30 318is turbo we use only one piece smt6 just like you guess. In this case you must disconnect original lambda sensor.


 About pistons i don't know i have use 86mm forged wossner pistons made for OPEL C20LET motor and honda rods. I use them in my project because in my supplier shop than  don't have another available parts for my engine.

There has many  combinations to build powerful engine

[E36Al]

Ahh, that goes some way to explaining your choice of piston/rod combination.
Here in aus, nissan engines dominate, so sr pistons are plentiful and cheap.
Just going off compression height figures i think they may be suitable.
SR20det=32mm ch, M42=31.65mm ch
So with a thicker head gasket than m42 standard they may be good with standard 140mm 22mm pin rods.
Or a good high comp n/a option for strength, with standard head gasket.

So back with the e30 318is, without the original o2 sensor how do the standard fuel injectors behave?
Or does the bosch have provisions to read a wide band lambda, which you use for smt6 and air/fuel ratio meter also?

Cheers Al

[ose30]

In this case you must disconnect original lambda sensor.

Why? It's easy to make Motronic run without lambda correction.

[ludiagsm]

Ahh, that goes some way to explaining your choice of piston/rod combination.
Here in aus, nissan engines dominate, so sr pistons are plentiful and cheap.
Just going off compression height figures i think they may be suitable.
SR20det=32mm ch, M42=31.65mm ch
So with a thicker head gasket than m42 standard they may be good with standard 140mm 22mm pin rods.
Or a good high comp n/a option for strength, with standard head gasket.

So back with the e30 318is, without the original o2 sensor how do the standard fuel injectors behave?
Or does the bosch have provisions to read a wide band lambda, which you use for smt6 and air/fuel ratio meter also?

Cheers Al

 If your engine is in good condition with removing the original lambda senzor the engine still will work fine ,labmda senzor need to be removed bacouse of part throtlle boost rejimes.
  When lambda is connected ecu has tendency to make afr-s close to 14,5-15 and that is bad. we need afr 14,5-15 only on idle  and some atmosfere rejimes but on boost we need afr 11,5-12

[ose30]

With Motronic area code plug connected with certain ohms resistance you can still have lambda connected and Motronic does not make any lambda corrections. You can still use lambda for example to A/F gauge or just make a suitable switch and you can occasionally use lambda to fine tune your A/F ratio if you are just cruising.

[ludiagsm]

With Motronic area code plug connected with certain ohms resistance you can still have lambda connected and Motronic does not make any lambda corrections. You can still use lambda for example to A/F gauge or just make a suitable switch and you can occasionally use lambda to fine tune your A/F ratio if you are just cruising.

 That narowband  lambda can't be used for serius setup , it is only for lamers! In my projects i did't use narow band lambda for nothing not even monitoring with china afr gauges,  if you thing that narowband is good so please use it in your projects please don't mess in mine this thread is about my projects and i am satisfied from my results  

[E36Al]

Excellent, that's just the information i needed.
I think i will leave standard injectors as is for good cold start/idle/atmospheric conditions and provide additional rail and injectors along the intake runners, such as your suggestion. Should make tuning for boost easier than one set of larger injectors, then having to remap entire rev range and hope for smooth transition. And requiring standalone expensive ecu.
I plan on using my smt6 and a tech edge wide band unit i built up.
These are made in australia and are quite cheap to purchase kits.
They are a true wideband unlike factory o2 sensor, which is useless for accurate readings.Especially when relying on afr information for home tuning.

Thanks again

[ose30]

That narowband lambda can't be used for serius setup

I have a Bosch wideband unit.

if you thing that narowband is good so please use it in your projects please don't mess in mine this thread is about my projects and i am satisfied from my results

I am sure you are satisfied with your results, but hey this is a automotive forum and i suppose most of us would like to read different kind of solutions and also have different kind of opinions. I have messed around with Turboed Porsches over ten years, so i have some experience how to run and modify turbo charged engines. If you do not like to have discussion, i suppose you are at the wrong forum. This is a free world, and if we write what we should (not spam) you just have to tolerate it that someone may do things differently.
BTW i made my first Turbo charged engine back in 1978 (350 cid Chevy V8 installed into 1965 Chevy Nova SS), when you did yours ?

[ludiagsm]

I have a Bosch wideband unit.

 

I am sure you are satisfied with your results, but hey this is a automotive forum and i suppose most of us would like to read different kind of solutions and also have different kind of opinions. I have messed around with Turboed Porsches over ten years, so i have some experience how to run and modify turbo charged engines. If you do not like to have discussion, i suppose you are at the wrong forum. This is a free world, and if we write what we should (not spam) you just have to tolerate it that someone may do things differently.
BTW i made my first Turbo charged engine back in 1978 (350 cid Chevy V8 installed into 1965 Chevy Nova SS), when you did yours ?

Hey i don't give a fuck when you start to built turbo engines
make your own thread and there you can shear your ideas , for me your solutions here is a pure SPAM !