ro55ifumi Posted April 18, 2012 Share Posted April 18, 2012 AllIs the above required on a Forged Motor??John Quote Link to post Share on other sites
mattyD Posted April 18, 2012 Share Posted April 18, 2012 would help things breathe better had you setup the piping correctly and also looks mint ;) Quote Link to post Share on other sites
ro55ifumi Posted April 18, 2012 Author Share Posted April 18, 2012 Never mind looks is it required?? Quote Link to post Share on other sites
micky boy Posted April 18, 2012 Share Posted April 18, 2012 Most big spec 4efte's use them so i gessing so if you had forged engine runnig stock ct9 ect think it wouldnt realy be needed but runnig alot of boost id put one on for piece of mind Quote Link to post Share on other sites
joel_ep91 Posted April 18, 2012 Share Posted April 18, 2012 my bro doesnt run one on his gt and he has been running it at 441bhp no problem what so ever. Quote Link to post Share on other sites
Josh@TunerLifestyle Posted April 18, 2012 Share Posted April 18, 2012 jamie owen dosent have one on his forged td04 running 270bhp Quote Link to post Share on other sites
micky boy Posted April 18, 2012 Share Posted April 18, 2012 ^^Thers your answer lol Quote Link to post Share on other sites
ro55ifumi Posted April 18, 2012 Author Share Posted April 18, 2012 Cheers Boys answered my question John Quote Link to post Share on other sites
mattyD Posted April 18, 2012 Share Posted April 18, 2012 as said, its not required no but i imagine it does have its use's Quote Link to post Share on other sites
Jamie1st Posted April 18, 2012 Share Posted April 18, 2012 Ive never run one on mine. Running 1.4Bar on TD04. Nobody mentioned anything with not running one when it was getting mapped, so cant be bad.On the other hand, I want one because they're pretty sexy!! Quote Link to post Share on other sites
ro55ifumi Posted April 19, 2012 Author Share Posted April 19, 2012 Ive never run one on mine. Running 1.4Bar on TD04. Nobody mentioned anything with not running one when it was getting mapped, so cant be bad.On the other hand, I want one because they're pretty sexy!!Hope to be running a similar set up, so good to hear John Quote Link to post Share on other sites
Socks Posted April 19, 2012 Share Posted April 19, 2012 Improve the engines breathing capabilities...Stock setup has 2 small breathers. The PCV valve also closes completely when on boost...This is fine for 130bhp but for 250bhp+ Im suprised your not running one yet Jamie! Quote Link to post Share on other sites
Ricky@Race-Tech Posted April 19, 2012 Share Posted April 19, 2012 We have extensively monitored crank case pressure on the dyno. I'd strongly advise you run one, it depends on the engine, the clearances, the power etc etc.Something not many people know is breather setups gain HP, and more than you might think. The cross sectional area of the bottom of a 4efte piston is approx 43cm^2. x 4 this is 172cm^2.Lets say you had a huge breather issue and the car had 1 bar crank case pressure. Thats 172kg's of force acting against the pistons every single rotation of the engine. At 6000rpm's thats 100 x per second. So even 0.01 bar would result in 172kg's per second acting against the pistons. Again 0.01bar is at the other extreme. Quote Link to post Share on other sites
ro55ifumi Posted April 19, 2012 Author Share Posted April 19, 2012 Improve the engines breathing capabilities...Stock setup has 2 small breathers. The PCV valve also closes completely when on boost...This is fine for 130bhp but for 250bhp+ Im suprised your not running one yet Jamie!We have extensively monitored crank case pressure on the dyno. I'd strongly advise you run one, it depends on the engine, the clearances, the power etc etc.Something not many people know is breather setups gain HP, and more than you might think. The cross sectional area of the bottom of a 4efte piston is approx 43cm^2. x 4 this is 172cm^2.Lets say you had a huge breather issue and the car had 1 bar crank case pressure. Thats 172kg's of force acting against the pistons every single rotation of the engine. At 6000rpm's thats 100 x per second. So even 0.01 bar would result in 172kg's per second acting against the pistons. Again 0.01bar is at the other extreme.Thanks for the input John Quote Link to post Share on other sites
mattyD Posted April 19, 2012 Share Posted April 19, 2012 So basically what I said in the first place yet you took no notice of it? Quote Link to post Share on other sites
ro55ifumi Posted April 19, 2012 Author Share Posted April 19, 2012 So basically what I said in the first place yet you took no notice of it?Thank you, just need opinions of more than 1 mateJohn Quote Link to post Share on other sites
mattyD Posted April 19, 2012 Share Posted April 19, 2012 lol, no worries mate i was having a bit of an episode this morning, fifa pissed me off plus the opinions of people who have a wider knowledge than me does help Quote Link to post Share on other sites
shorty Posted May 7, 2012 Share Posted May 7, 2012 Been running my forged lump for 5years done over 10k miles. never used a "race spec cover" just a breather on top. last time i had the engine apart for upgrades it was as mint as the day i got her. tollerences are all spot on. no undue stress apears to of happened. but as ricky said maybe it depwnds on spec and build?? Quote Link to post Share on other sites
Flaminsam Posted May 7, 2012 Share Posted May 7, 2012 I thought crank case pressure would help to dampen the impact from a power stroke. Plus if you want to go all out wouldn't you need the oil returns from the head porting for instance? Or even have the inside of the block polished to allow the oil to return to the sump quicker and allow the crank case pressure to dissipate? Also as two pistons go up two come down so the displacement is next to nothing in the bottom end any way? Obviously I know you will get a small ammount of blow by, raising the crank case pressure slightly. Quote Link to post Share on other sites
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