Best Value Light Rebuilt Engine Formulae

[bigBADbenny]

Thanks. Ill fix it.
There is a lot more material added with the custom decks though.
Please don't hesitate to jump in and add knowledge to this discussion.

Since we're discussing budget builds with a little extra wisely spent, take another peek here:
http://www.iwsti.com/forums/built-motor ... udget.html

What's intriguing is that the author of that post has come to a similar conclusion to mine.
If the bores are in perfect shape as regards the honing then simply dropping in forged pistons is the go.

Stage before = heads off/new HG/head reco etc.
If good bores = drop in pistons
Stage after/bores no good = crack the cases do the lot according to budget if any...

At this point the crate engines start looking like a great deal

[senator]

My power target is 300kw atw. ALL DAY ON 98.!!

Multiple your $6k budget by 4 and that will get you close.

You’d be surprised how much fun and cheaper are 200 kw car is which handles well.

[kiahatsiu]

Whoever says an ej255 is open deck either needs their eyes checked or needs to get off a pc and actually learn how to turn a spanner
I will tell you all liberty ej255 are open deck - and whilst only two extra ribs, these ribs do actually assist in keeping the cylinder true during high cylinder pressures

I hear you,so many people want to tell you the blocks are vastly different.
That being said, in my mind a semi closed deck would have a lot more filleting than the factory semi closed ones.
Having had some time to think about it sitting around this morning: Introducing the concepts of deck work, sleeves, and dowels is not sticking to the theme of 'budget.'

[bigBADbenny]

My power target is 300kw atw. ALL DAY ON 98.!!

Multiple your $6k budget by 4 and that will get you close.

You’d be surprised how much fun and cheaper are 200 kw car is which handles well.

I agree 100% with that.
Confirmed when I took taxi rides in various 250kw-ish atw rides.
It's amazing, but OTT IMHO, especially if the funds are lacking.

[Boostaddict]

My power target is 300kw atw. ALL DAY ON 98.!!

Multiple your $6k budget by 4 and that will get you close.

You’d be surprised how much fun and cheaper are 200 kw car is which handles well.

Yeh for sure.

All im talking about is the motor aspect of the 300 kw atw.

The turbo, fueling etc is another thing.

I want the strongest possible option for my budget!!

If i need to 'accidentally' spend an extra $1k to get it then that might happen.

[Boostaddict]

Whoever says an ej255 is open deck either needs their eyes checked or needs to get off a pc and actually learn how to turn a spanner
I will tell you all liberty ej255 are open deck - and whilst only two extra ribs, these ribs do actually assist in keeping the cylinder true during high cylinder pressures

I hear you,so many people want to tell you the blocks are vastly different.
That being said, in my mind a semi closed deck would have a lot more filleting than the factory semi closed ones.
Having had some time to think about it sitting around this morning: Introducing the concepts of deck work, sleeves, and dowels is not sticking to the theme of 'budget.'

Yes you are correct. Dowels and sleeves arent budget!!

But i suppse neither is 300kw atw.... Maybe i should turn down my thoughts to 270-280 and keep the block standard and forge the rest with some nice cams?!!!! Mmmhhh

[bigBADbenny]

How many 250-300ATW cars have you been in?
Did you ever read this:
http://forums.nasioc.com/forums/showthr ... ?t=1393580
Anyhow this is the thread for budget builds around the 200KW ATW... that wont immediately blow up.

[dr20t]

Dan man you're killin me !

As per my advice:

1. To handle up to 270 atw needs just pistons and stock rebuild

2. To handle 270-300 atw reliably needs pistons and rods and rebuild

3. To handle 300 plus atw reliably for more than 50,000kms in a ej255 needs all of the above plus sleeves. Will also need headwork on a ej255 and cams.

4. To go close to 400 reliably you should close deck it too.

Don't keep stretching your budget - if you don't have the cash for it now and you're not actualy going to chase the power it is being built for now then its a waste in my opinion because in six months you could get bad fuel and blow it up making 170atw even if its built to handle 300atw

[senator]

Dan man you're killin me !

As per my advice:

1. To handle up to 270 atw needs just pistons and stock rebuild

2. To handle 270-300 atw reliably needs pistons and rods and rebuild

3. To handle 300 plus atw reliably for more than 50,000kms in a ej255 needs all of the above plus sleeves. Will also need headwork on a ej255 and cams.

4. To go close to 400 reliably you should close deck it too.

Don't keep stretching your budget - if you don't have the cash for it now and you're not actualy going to chase the power it is being built for now then its a waste in my opinion because in six months you could get bad fuel and blow it up making 170atw even if its built to handle 300atw

+1

Dan

Just save us the on going questions and buy Xr6 turbo slap a tbe, injectors, fmic, e85 tune and hello 400kw.

[Boostaddict]

Dan man you're killin me !

As per my advice:

1. To handle up to 270 atw needs just pistons and stock rebuild

2. To handle 270-300 atw reliably needs pistons and rods and rebuild

3. To handle 300 plus atw reliably for more than 50,000kms in a ej255 needs all of the above plus sleeves. Will also need headwork on a ej255 and cams.

4. To go close to 400 reliably you should close deck it too.

Don't keep stretching your budget - if you don't have the cash for it now and you're not actualy going to chase the power it is being built for now then its a waste in my opinion because in six months you could get bad fuel and blow it up making 170atw even if its built to handle 300atw

Hahah

Naa man i get it. I promise.!! What im thinking is this.

Option 2 with around that 270-280kw atw to make sure that the car lasts.!! IE dont push it! Cause as ive found, you can push a stock setup and make the engine shit itself.

Thats all im saying. Go as far as i can on the budget and then limit the power to a sensible range that it will work reliably

[Boostaddict]

How many 250-300ATW cars have you been in?
Did you ever read this:
http://forums.nasioc.com/forums/showthr ... ?t=1393580
Anyhow this is the thread for budget builds around the 200KW ATW... that wont immediately blow up.

Yeh ive been in a track GC8 with 340kw atw , coils, stripped interior etc

When it lifted my feet off the floor in 3rd ..... I was hooked

And that was 'only' 19-20 psi.... So it would have been around the 280-300kw atw!!! Loved it.!!

And that link says its down for maintenance!!

Ive also driven my bro's 300kw atw Datsun 1600.... Now that was FUN!!

[bigBADbenny]

Yes nasioc LGT etc are sometimes down for maintenance.


So before we move on, can anyone explain the relationship between sleeving and decking?
I understand one can have either or both.
It's outside the scope of this thread yet I'm intrigued

[KiDo_Tuning]

The outfront blocks are closed deck using a more extensive insert to add additional strength to the 08+ blocks that suffer from weak bores. Outfront recommend decking at +10lbs of boost.

Just to clarify on this: They recommend sleeving when above 10psi to make the rated engine power. Thing with boost is, that is is possible to make 300Kw@wheels on 12psi since boost is inlet manifold pressure creating a restriction, not cylinder pressures

Obviously cylinder pressure is what causes the cylinders to walk not air that has not even passed the inlet valve

[KiDo_Tuning]

Yes nasioc LGT etc are sometimes down for maintenance.


So before we move on, can anyone explain the relationship between sleeving and decking?
I understand one can have either or both.
It's outside the scope of this thread yet I'm intrigued

Decking is ensuring the HeadGasket surface is on a parrallel plane to the centreline of the engine.

Sleeving is fitting new cylinder walls, that take more abuse without chipping the cylinder wall but are thicker to hold more boost.

Google has detailed photos too

[bigBADbenny]

Aye doing that now
I did mean closed decking.
The answer being that semi or closed decking uses "cold welded" inserts that locate and reinforce the stock bores.
And sleeving using ductile iron sleeves can supercede any requirement for deck inserts due to the thickness of the iron sleeves (if T sleeves).

I used the somewhat xtreme and xcessive xamples here:
http://www.xcceleration.com/engine-pack ... gines.html