2.0 Rebuild Advice Needed, 2056 or 2270? Options

[john_g]

I'm getting ready to rebuild my 2.0 and am considering going to either 2056, or maybe even up to 2270. What are the downsides or problems associated with going 2270, if any?

[r_towle]

I recall some testing that showed the intake runners and throttle body would support up to 2.4 liters.
It was quite a while ago when I looked really hard at this, but one of our resident science guys did some calculations and the intake system will support the airflow.
Maybe someone could work on those numbers again that can remember thermdynamics..


The djet may be the issue that you experienced, but I believe the physical intake system can handle the airflow.

I remember you tried and found the system to be to weak for your goals and what you want to build.

For me, the goal was different. how big for how little money was the objective...I believe I have achieved it, now I am curious to see what I can trick Djet into doing...
I have read to many stories about Megasquirt and how it does not seem to work right...or its finicky, or some other reason it cannot be tuned...
I figured, why not take the Djet system to the next level.
Heck, its the preffered method for alchohol based drag cars...so maniold pressure can and does deal with large aggresive camshafts, and lots of overlap....but it may just be a matter of some technology to smooth out the curve properly.

I have found a few manifold pressure sensors, but not like the one we use, something more modern.
Just a napkin idea that another buddy and I came up with on how to replace the MPS with a more modern setup, and have the ability to tune it for a larger motor...

I know your motors put out the maximum...
a 2.4 pushing 150hp, without getting to hot, is a fun car.
Not looking to break the bank, do external cooling, nor get near 200hp.
Looking for a fun car that can be streetable, fun at an autox, and a bit unique.

Heck, if I did not like tinkering, I would sell the car.


Rich

[rwilner]

I have read to many stories about Megasquirt and how it does not seem to work right...or its finicky, or some other reason it cannot be tuned...

Rich
As you know from my experience -- MS isn't plug and play, but it's the most cost effective way to squeeze out all the power from our engines IMO, simply because it can adapt to various configurations and be tuned....especially if you control fuel and spark.

Now of course I am no expert, but once it was running (with help from you, Chris, and Mark), it was running better than my tired old D Jet ever did.

/hijack over

[914_teener]

I have read to many stories about Megasquirt and how it does not seem to work right...or its finicky, or some other reason it cannot be tuned...

Rich
As you know from my experience -- MS isn't plug and play, but it's the most cost effective way to squeeze out all the power from our engines IMO, simply because it can adapt to various configurations and be tuned....especially if you control fuel and spark.

Now of course I am no expert, but once it was running (with help from you, Chris, and Mark), it was running better than my tired old D Jet ever did.

/hijack over

Hmmm. Interesting as ever here.

I believe the OP is talking about Volume and Jake is trying to address VE.

The OP spreadsheet does not address VE which has a lot to do with the hard map VE table on the D-jet board. It is one thing to due a volumetric analysis as opposed to an integral analysis which would measure all the aspects of the given induction system.

I think Rich (T) is saying is that it will run...maybe just not very efficiently...I might add....respectfully. Can't address why the stroked motor won't work very well with D-jet but you can do some integral math to figure it out once you really understand how D-jet works. My calculus is a bit rusty.

Sounds like Jake has already done some quantitative research on the VE of the type IV and knows what is optimal.

With respect to MS.... I have been reading some threads recently and without doing my own research on MS....sounds like some are having trouble understanding how this is accomplished...(including myself) and spending a lot of time tuning it later without a core understanding of how to map the VE curve and then fine tuning it.

Like Rich said there is no out of the box solution.

My two bits...however I am planning my own build so I always can learn from others. (IMG:style_emoticons/default/sunglasses.gif)