Fg F6 Bottem End And 450Rwkw

[Stazza_Brendan]

Thanks for that NVY

[RAP1D]

Looks like alot of guys have the wrong ideas here.

First up any BA to FG bottom end will make 450kw, alot of great tuners / workshops have proven this over the last 7 years.

We all know there's loads of busted BA and BF motors, with the common weak point, or shall we say common break point, being a rod, usually near the end of the block.

I could write a book on what the various causes for this breakage are, but there's little point in doing that, as it would all be just full of opinions rather than tested fact.

But, there are some areas that have been addressed on the FG that back up alot of my and other poeple that I feel are at the pointy end of the xr6t comunities theories.

Anyone can just jam on a suitable sized (for 450kw) turbo, smash in 20odd psi, get the fuel and timing somewhere near ok, and stand back and let her rip.

If all the boxs are ticked it'll make the power on the Dyno and won't rattle it's head off... All happy day yeah?

Or did the motor let go befor it even saw 300kw? Did it rattle it's way from 2500rpm and finally give in at 5000 where the load was just too much?

Did it have way too much timing, corrections turned to low, not enough fuel, poor fuel quality, poor fuel pick up, too much heat, poor fuel distribution through the rail, poor injector set up, varying head temps, varying gas presures in exhaust manifold, varying gas temps in runners, dirty eng oil, hot engine oil, oil that has lost it's original properties????

All of these factors play a bigger role in engine reliabillity that just the con rods, alot can be avoided at tuning, the rest avoided at build time.

FG motors are not mirracle motors, as a complete unit, operating in an FG car with FG accesories and software, they can be made reliable at the 400kw level, but they are still being pushed beyond their design limits, I know the motor in my G6 is pushed totally beyond what it was designed for, and as a result, everytime I nail it at 20 or 25 or 30psi, I hold me breath and wait for the bang!

50000 kays at 400-500wkws has certainly given the engine a hard time, its still runs as my daily driver, and has been super reliable, but in reality it's in no way what I would consider "reliable".

If your simple putting an Fg bottom end in a ba or bf so you can punch 450 all day, everyday and usuing all the ba manifolds, PCM ect it will be no more reliable than it was when new.

To get reliabilty more on your side, and I'm not saying making it reliable, just more so than how it is, use these parts...

Stock FG or well made exhaust manifold, eg 6boost

dual entry fuel rail with adjustable reg, modded stock works

high volume fuel pump/ surgetank

injectors atleast 30% more flow than you need, eg 80s

a very good intercooler & intake system that flows ALOT

a very high flowing exhaust system- 3.5 or more correctly built

propper valve springs, correctly rated for 25psi

and a sh*t hot tuner, there's a handfull of them around the country, seek them out, be nice to them, do what they tell you and pay what they ask... Don't haggle or be a tightarse.

We all know of the idiots that pestered and anoyed one of our comunities finest tuners... Where did that get them?

Do all that and you'll be as close as you can get to a "reliable" 450, but just don't drive around thinking it's fully reliable... Get it built if you want that.

Stay safe guys!