sga86_LGT Posted July 11, 2005 Share Posted July 11, 2005 Does anyone know how much the intake manifold from the sti cost? cause i spend some time looking at my engine today.. and i realized.. THE INTAKE MANIFOLD IS PLASTIC!!.. i was about to get me a boost controller.. it would be useless.. cause i can only boost it to 1.2 at the most, after that it will just crack the manifold. So..if anyone knows where i can get me a sti intake manifold... plz let me know. thx Link to comment Share on other sites More sharing options...
KTM 525 Posted July 11, 2005 Share Posted July 11, 2005 How do you know higher than 1.2= cracked manifold? I dont know if the plastic flows as well as the STI's manifold but there is less heatsoak. Link to comment Share on other sites More sharing options...
rao Posted July 11, 2005 Share Posted July 11, 2005 OMFG!?!?!?!?!?! Really? There was a group buy here for STi manfiolds that won't explode at 18 psi. There has been a lot of speculation, but abosultely no evidence, that the Legacy's manifold is more restrictive than the STi's (which, prepare yurself for this scary truth, is the same as the WRXs, except for the throttle cable bracket that the STi doesn't need). People have made in excess of 300 whp without the Legacy intake manifold showing any signs of damage. is your friend. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
rc0032 Posted July 11, 2005 Share Posted July 11, 2005 ^ Silly RAO sarcasms not for mods Link to comment Share on other sites More sharing options...
AWDxBOOST Posted July 11, 2005 Share Posted July 11, 2005 holy crap plastic!!!!! no you'll be okay...no one has cracked on yet as far as i know Link to comment Share on other sites More sharing options...
rony Posted July 11, 2005 Share Posted July 11, 2005 holy crap plastic!!!!! no you'll be okay...no one has cracked on yet as far as i know Lol My Car vBGarage Link to comment Share on other sites More sharing options...
BatChips107 Posted July 11, 2005 Share Posted July 11, 2005 haha we have plastic engines Link to comment Share on other sites More sharing options...
AWDxBOOST Posted July 11, 2005 Share Posted July 11, 2005 i was takin some time to look at my engine today too, and my pistons are plastix0rs! ill be damned, my compressor is toO! Link to comment Share on other sites More sharing options...
PGT Posted July 11, 2005 Share Posted July 11, 2005 <------- PGT has plastic bumpers Link to comment Share on other sites More sharing options...
Guest clawdnb Posted July 11, 2005 Share Posted July 11, 2005 i got a plastic engine cover...thats why i took it off, so it doesnt melt on top of my engine under the extreme heat/horsepower the engine makes...lol Link to comment Share on other sites More sharing options...
Guest *Jedimaster* Posted July 11, 2005 Share Posted July 11, 2005 Dammit man! The radio is plastic too!!!!1 Don't run any extra power through it or it'll melt like a wet intacoolar!!11 Link to comment Share on other sites More sharing options...
Guest JessterCPA Posted July 11, 2005 Share Posted July 11, 2005 Ya know what?? My credit card is plastic too! All this time I thought it was platinum. Jesse Link to comment Share on other sites More sharing options...
Jaxx Posted July 11, 2005 Share Posted July 11, 2005 i really can't decide which is more amusing fearing a plastic manafold using a MBC on a subaru tring to push the vf-40 to 1.2 bar whos gonna start the pool for when this motor blows up? Link to comment Share on other sites More sharing options...
RobY Posted July 11, 2005 Share Posted July 11, 2005 haha Link to comment Share on other sites More sharing options...
rony Posted July 11, 2005 Share Posted July 11, 2005 i really can't decide which is more amusing fearing a plastic manafold using a MBC on a subaru tring to push the vf-40 to 1.2 bar whos gonna start the pool for when this motor blows up? My Car vBGarage Link to comment Share on other sites More sharing options...
mbacis Posted July 11, 2005 Share Posted July 11, 2005 Ouch, you guys are harsh. I was surprised at first to see a plastic intake manifold as well. Not concerned, just surprised. It isn't the best looking setup. One reason for keeping the engine cover on, to hide the less than impressive plastic manifold. Link to comment Share on other sites More sharing options...
Slickvic Posted July 11, 2005 Share Posted July 11, 2005 i really can't decide which is more amusing fearing a plastic manafold using a MBC on a subaru tring to push the vf-40 to 1.2 bar No kidding. For a second I thought I was on the nutsack forums. Link to comment Share on other sites More sharing options...
LandShark Posted July 11, 2005 Share Posted July 11, 2005 What's with all the crapping on the plastic manifold. I happen to like it. I removed my engine cover permanently to "showcase" the whole engine, including the cool black intake. Seriously, I've had the car at several Subie meets and I'd say the reaction is 99% favorable, or at least sincerely curious (no criticism) from other STi or WRX/RS owners. They think its interesting and different. I don't recall a single person saying, "shit, that plastic intake manifold is going to melt, crack or explode." Link to comment Share on other sites More sharing options...
sga86_LGT Posted July 11, 2005 Author Share Posted July 11, 2005 ... well, if you are fixing up your car to be for show, by all means go for it..anyways.. the material they use for this intake manifold is resin. anything u add to the car like exhaust, intake.. whatever.. is putting more pressure into the engine.. once u mod or tune your car to a certain point, the stock legacy intake manifold will crack.. even the engine it self, once you mod to a point you will have to change out the internals. even the tranny for this car can only take up to about 350-400 hp, and change your intake manifold to something thats made of metal.. or you could end up spending more money fixing it.. or.. just rice up your car and leave everything else stock. Link to comment Share on other sites More sharing options...
nKoan Posted July 11, 2005 Share Posted July 11, 2005 I guess it depends on how big of power you are hoping to achieve. The plastic manifold should be good for many reasons, less heat soak, smoother interior bore (air moves faster with less turbluence in there) etc. I bet it would crack at high PSI loads, but people have pushed ~1.2 bar with no problems yet. The intake manifold is by far not the weakest part of the stock system. Link to comment Share on other sites More sharing options...
dark_rex Posted July 11, 2005 Share Posted July 11, 2005 i was takin some time to look at my engine today too, and my pistons are plastix0rs! lmfao i just spit my sandwich out laughting. lol dR Link to comment Share on other sites More sharing options...
liquidiq Posted July 11, 2005 Share Posted July 11, 2005 LS1s use a plastic composite manifold. http://www.idavette.net/hib/ls1c.html Also, the block is semi-closed, so please PLEASE do research before talking about things you don't know. Also, the internals are all forged except for the pistons. No need to change out internals unless you're over 450+whp, that's my opinion. Even then, I would just swap pistons. Link to comment Share on other sites More sharing options...
Guest JessterCPA Posted July 11, 2005 Share Posted July 11, 2005 Seriously, I think BMW has been using "composite" intakes for years. Why not? There are many plastics out there that are far stronger than traditional materials. It's thinking like this that pushes technology forward. Jesse Link to comment Share on other sites More sharing options...
Beanboy Posted July 11, 2005 Share Posted July 11, 2005 Well, modified open deck/semi-closed deck at least. Two additional hardpoints in the block for cylinder support. -B -B http://www.standardshift.com Link to comment Share on other sites More sharing options...
sga86_LGT Posted July 11, 2005 Author Share Posted July 11, 2005 LS1s use a plastic composite manifold. http://www.idavette.net/hib/ls1c.html Also, the block is semi-closed, so please PLEASE do research before talking about things you don't know. Also, the internals are all forged except for the pistons. No need to change out internals unless you're over 450+whp, that's my opinion. Even then, I would just swap pistons. WOW, smart guy ehh.. i DID do my research and IT IS AN OPEN DECK.. except i was looking at a non-turbo legacy Link to comment Share on other sites More sharing options...
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