Member Profile - Boostaddict

[Boostaddict]

Yeh i had a good read.... Just not the 60 pages or what ever it was.

I keep getting told that these motors ARENT reliable and need excessive money spent on them.

But your saying that close decking isnt necessary on a 207.???

Or am i adding extra security that may be over the top but work in my favour for what i want to do with my car.!!

Dunno i may be crazy.!!

[Brunsy3.0]

Daaaaamn cuzz........that noise. Horrific to hear. Hope the next build is solid and you can enjoy once more

[bigBADbenny]

High boost 255 & 257 do split cylinders... 207s don't.
Closed deck reinforces weak cylinders.

Just re read Micks post I linked from iirc Rexnet.
Some good options for you right there.
Eg new short w/ conservative tune, rss block with forgies for more boost, or go nuts...

[jacks-GTB]

I think when it comes to sleeving, It has a lot to do with installation...I've heard they need to go in cold.

[dr20t]

The version 7,8 and 9 (and revision a version 10) ej207's had 9.7mm cylinder walls compared to the 7mm of the ej05,255 and 257.

Best is obviously 13mm walls of the version 10 revision b ej207

But remember any machining of the bore to fit larger pistons will obviously defeat the purpose of the thicker walls

If you want to use a stock size 93mm piston in a 207 but with 2.5 crank (custom pistons obviously so your pistons don't stick out of the block with the longer stroke), then you will only end up with a 2.14 litre motor

So when you consider trying to get 2.4 litre out of an ej207 block them you would need to sleeve and close deck

Mick

[bigBADbenny]

Or CD and destroke a 2.5 with long rods, 2l crank and custom pistons: 8k +++ rpm limit
But for what you need... Go the stock short or rss option

[Boostaddict]

What im thinking is this

EJ207 version 10 block.

My 2.5 heat treated & nitrided crank

My Tomei Rods

New custom stroker pistons in a 95mm

Close deck the block

So would make probably a 2.2-2.3 motor with HEAPS of wall thickness AND close decked.

This sounds like the best compromise between capacity and strength.

Am i talking out my ass here??

Really looking for the strongest possible combination... Within reason.!!

[bigBADbenny]

Outfront 2.5 cd case halves are US$1800 plus delivery...
That or similar might be a better option as your internals will be compatible.

[bass_straitener]

As part of your previous build, did you make any fueling mods? Parallel lines, FPR, fuel pump, injectors etc...

There is some history with regards to cylinder 3 failure and Subarus and the most likely cause.

[Boostaddict]

Outfront 2.5 cd case halves are US$1800 plus delivery...
That or similar might be a better option as your internals will be compatible.

Mmmhh thank Benny

Will have a look

[Boostaddict]

As part of your previous build, did you make any fueling mods? Parallel lines, FPR, fuel pump, injectors etc...

There is some history with regards to cylinder 3 failure and Subarus and the most likely cause.

Mmmhh actually i do remember reading about 1 cylinder that gets less fuel due to the design of the rails etc.

I also remember thinking that there was a fix for it, perrin or someone did a rework on the way it distributed the fuel at the motor.

I think you might be onto something

[<GB>]

Sounds expensive! Howich is a 207block compared to a 2.5?

[Boostaddict]

Sounds expensive! Howich is a 207block compared to a 2.5?

Not sure.

Gotta get some quotes and call some people next week.

[bigBADbenny]

Closed deck vs sleeve discussion
http://forums.nasioc.com/forums/showthr ... ?t=2639753

[Boostaddict]

Closed deck vs sleeve discussion
http://forums.nasioc.com/forums/showthr ... ?t=2639753

Thank Benny

Its what i thought. Sleeving CAN be better, but also can be shit when compared to close decking.

This is why my builder said sleeving...... I just did the dumb thing and bought an unknown sleeved block!!

Will see whats happend when it comes out and apart.!