boost monkey

great news skinnyman, get it up on here! :grin:

:shock: :shock: :shock: :shock: woah! that's insane. variable outlet pressure with respect to time would be AMAZING! definitely final year project material I think :salute: Man i'd love to get a first... Really need to scale this stupid thing to make it look less like a 2nd grade science experiment and more Uni-grade I think! I swear i made something like this out of a cornflakes packet and loo rolls when I was a kid :scratch: Without an accurate scale it's just a bunch of pretty lines really. Working out the air pressure at the valves would be useful too: Now I think about it, I'm pretty sure intake pressure will go UP and not DOWN especially at higher rpms. yes you're right this is actuall computational flow dynamics and not FEA at all! I must be losing it :nuts:

silly joy riders :nono: that looked like it might have been a semi-reasonable Punto at one point!

40hp from 200cc? sounds a bit far fetched even with KR cams doesn't it? you really should post all this up in the FI 16v thread, there are a lot more people who check that than the random little threads like this one :salute:

Air intake temp was 293K or 20degrees Celcius.

Ok, been a while since I updated this but I developed the first bastardised upper intake today. It's bastardised because: other than the 42mm inlet tracts, none of the dimensions are accurate for a 16v intake, material it's modelled in is translucent plastic for sake of seeing particle flow - think the manifold is actually magnesium? no radiused/chamfered/filleted edges = lots of evil 90deg corners for air flow to literally get trapped in. Would be nice to find some actual dimensions for the intake without cutting up my spare if I can help it! I modelled the wall thickness as 5mm, negligible surface friction (i.e. not textured as the real intake is) and the program demanded I had an inlet air pressure higher than the outlet, so I modelled 2bar inlet (i.e. 1 bar boost) and outlet at 1bar which is not particularly accurate but for a first run it will do. Unfortunately didn't work out how to use multiple outlets so I had to each tract seperately which is time-consuming as the modelling takes about 3-5 mins on my AMD 2.4 with 1Gb. Here are the pics: Internal flow volume of my model. This is what the FEA uses when working out where each particle will go. I modelled 50 particles. Manifold changed into translucent plastic so that flow could be observed. Arrows show inlet at the end of the plenum and outlet at the end of tract 1. You have to "close" the system by plugging up the holes for the analysis to work. Inlet Tract Flowrates Cylinder 1 - Max velocity 297.352 m/s Cylinder 2 - Max velocity 306.398 m/s Cylinder 3 - Max velocity 309.715 m/s Cylinder 4 - Max velocity 297.933 m/s Obviously, flow data could change when the manifold is correctly scaled (might even be able to model the lower part too) but it's a good base to continue on from I think. Any comments / criticisms welcome :salute:

not true, there's tons of turbo info on that thread. perhaps you just don't wanna read the whole thing? ;)

yeah i think 5w40 will be a little thinner when hot so if you have any worn oil seals you may see your oil level go down a bit.

yeah cheers guys :salute: deffo gonna replace them both. the lines aren't too willing to come out of the BP Reg either so i might be making up some of the long ones too :pale: ho hum.

Keep going buddy, it's gonna be awesome when it's done :clap:

Got the OS stripped back to just the beam, but all the brake lines are being annoying: most of the other hard:soft connections are corroded and looks like I may have to junk all the hard lines and get some more made up :/ Managed to remove the large bushing bolts but without removing the brake lines it won't drop down easily, plus the lower suspension bolts are giving even the Erwin a run for it's money :sad: one good thing i've found is that the brake pressure regulator has been renewed recently: I'll see if it's keepable when I get those brakes lines disconnected from it.

Been to get the tools from ProdigalSon's house :salute: and cracked on with the help of a uni mate. Car up and wheels off. Calipers came off really easily, and even the join from hard-soft brake line was simple! Plusgas is my friend :luvlove: Carrier bolts of doom. Why are they round on the outside and why do they have female allen heads? :confused4: #Erwin Erwin you're the man, if you can't do it no-one can!# Looks like Erwin's still got it. Disc and bearing very easy to come off, rear plate and stub axle definitely seen better days. Erwin had those too :grin: Erwin+Plusgas = unbeatable. Breaking for lunch now, but after it's the Erwin on the carriers, then disc and bearing off, then Erwin the stub axle bolts and both sides are done :salute: OS hard brake line got a bit twisted in the caliper removal - usable or replace it? :shrug: More updates after lunch, might even get the whole beam off today :clap:

Pico update here, not much doing apart from pic hosting at the mo! Getting ready to put the car up at my new place. Car as it has been since last Friday when the car ran out of MOT: kinda slung on the drive at a jaunty angle! :oops: Haven't got access to the garage yet, hence the makeshift Bike security :lol: :cuckoo: Apparently it rained last night, little arty shot for you :wink: Bodywork still holding up, gave it a quick glym wash yesterday just to remove the dirty marks post-subframe install. Moved the car across the driveway, there's a triangular space in front of the bay window which is ideal to sling a C in whilst it's living on stilts. Colour co-ordinated 8) :grin: Pic through the mottled glass on the front door! :nuts:

awesome work Coxy! I'll tyr to find flow rates for you :salute:

We had a guest lecture by Geoff Goddard last night, he was the chief engineer at Cosworth when the legendary YB engine was being made, and is full of fascinating stories! Did you know the force on cylinder head bolts when fuel combusts is around 12 tons? And that pistons in racing engines can accelerate up the bore faster than a bullet? very cool stuff.

ROFLCOPTER@Corradude!!11!!!!!omg keep them coming :grin:

YESSSS!!! :lol: that is so good :notworthy: I won't tell you about the time the Plum jumped off both stands... it's gunning for me :eek: :ignore:

the labour alone would be a few hundred I think, you'd be better off buying a rebuilt engine if you really want to, sounds like your car is running fine though. if it ain't broke and all that.

Possible VW Engineer in the 1990s?

I'll call you later Tom, no point muddying this thread just cos we can't agree on stuff. And no i don't think you're an idiot, why would you even think that? I'm hoping you're just having a bad day :salute:

I must admit I'm not convinced about this... When you see how much air the engine sucks in, and the volume being shoved through the grille and around the light when you're doing a reasonable speed, I just can't imagine that the filter would get hot enough to upset anything? The design and flow through the filter would be more important. In traffic it would potentially make more difference, but who needs all your power when you're doing less than 10mph??? The engine sucks air in through the foam filter which will be heated under the bonnet. the space around the headlight is minimal: more useful for the expansion of the headlights due to heat than an actual air intake, and the grille doesn't direct air anywhere near the air filter, just the radiator. the big flaps of plastic either side of the rad see to that! But, agree to disagree :|

work it out :nuts:

yeah could be matey, i guess if one was slipping the other one may not have been working great.

get onto CGTI, there are plenty of tuned valvers making 200+hp on K-jet and KE-jet.

i'm not convinced it will need the mixture adjusting. the foam filter will suck in hot air from the engine and hinder performance and if your exhaust really is a straight through (i.e. no silencer boxes) then you will have some back pressure issues and it will be really loud :shock: but take it to a garage and get them to check it either way.