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#11
Re: super charger
estyre
Posted on: 2012/6/18 6:17
how am i the "master of unfinished projects"? i sent you what you wanted if theres somthing missing put a pic up or send it to my mobile ,i put a pic up of the carbs on that forsale thread ,maybe if you looked you would of seen what you were buying
yes my mum posted it because i work 7:30 till 5 with half an hour for lunch ,post office closes at 4:30 do the math what fuken backing plates are you talkiing about ? the ones for the filters? i dont have them and what springs? how is it convenient for me to keep weber parts ,i dont run webers i run solexs if you didnt start threads all the time and generally pissing people off maybe "young tossers" like me wouldnt post smartass #OOPS# about your threads nick mitty ,i dont know you and havnt had any dealing with you ,ide appreciate it if you kept your comments to yourself
#13
Re: super charger
D
Posted on: 2012/6/18 6:39
SC14 or Twin screw of some kind is a good choice.
Jesse, finally some response from that big gob of yours and as for peeing peeps off Estyre you R a Guru for your age. The pic of the carb didnt show the rear section and I dont know how you supposedly ran these at all. Nothing to do with filters will send a pic again as in old PM. Nick, Ill be around in a fortnite for a personal delivery if you are avail send me an sms, currently finished recoing a 1.6 engine to fit the original 1.3 carry van with custom made adapter plate for the different box & home made engine mounts, changing synchros on 2nd & 3rd gears with new bearing kit for the box which nothing is avail for locally. Selling it as soons as its done in a month keeping liteace as prefer pushrods & parts availability. Wish it was easy finding a rust free C20 or A15 vanette.
#14
Re: super charger
estyre
Posted on: 2012/6/18 6:43
how do i piss people off ? and as for the carbs ,what exact parts are missing
i didnt say i ran them , i bought them of a guy in sydney that ran them on an a15 but was getting rid of them cos they were too big for his a15
#15
Re: super charger
supafatto
Posted on: 2012/6/18 6:57
On topic!
I never noticed any problems with my sc setup should have kept it! I've also built a turbo a series and the sc setup had boost all the way, but it can cause problems like over fueling or like I had snapped number 6 head bolt! As I stated I'd look in to head studs and metal head gasket and do it once! A14forced has a nice setup, all the best and keep us posted
#16
Re: super charger
D
Posted on: 2012/6/18 7:11
Estyre stick to reading my PMs & answering them as you have of now & sort it out.
Sc14 is the closest to A14/a15 unlike the Amr500 which Ive chosen to use for space issues and a certain layout. I would have used an sc14 or IHI AX1200 from a Mazda eunos which can flow as much as 420hp at 17.5psi in the right engine due to higher rpm limit than sc14 but space is limited in a 1000 and only after 100 lbs of torque atw.
#17
Re: super charger
supafatto
Posted on: 2012/6/18 7:21
Just make sure you don't drain the oil from sc14 as new oil is $100+ new
#18
Re: super charger
jmac
Posted on: 2012/6/19 10:03
I'll go back on topic after this first bit I promise - so what if someone makes a bunch of posts about various engine combination ideas/plans, and then they change them. This can happen because the discussion ended up bringing up a bunch of issues that made the particular combination more or less suitable to the original goal. And that's a good thing - wouldn't you rather 'map it out' here and find that a bunch of people with various experiences can say 'well this is what they don't mention, or this is a pitfall with that combo, or whatever' . surely that's what this group is all about - the sharing/fine tuning of information, to save us all thousands of dollars and hours of heartache! Sometimes the plans don't change, the situation does. I started gathering everything I needed for a supercharged a15 setup for my coupe. Then work slowed and more or less dried up and for a couple of months I was really struggling, and had no choice but to sell off various parts I'd amassed (often at a significant loss, because a bill came in and I had to pay it). Thankfully, I'm doing something else for a living now, busy as can be, and happier than ever. As a result, in the last 6 months I've started to re-build the collection of bits and pieces I need for the conversion. So instead of it taking perhaps 6-12 months, it took a good year plus to gather the parts, and then another year saw them slowly disappear (even when I started the new job, I still had debts to sort out) and now a futher 12 months or so to re-gather what I need, and 'then' I can actually start on most of the work. During this time, the car's gearbox let go, luckily, I knew it was on the way out, and grabbed Marty's 5 speed 60a box he had for sale, just prior to that, and could use that in the mean time. but it wasn't cheap, so that put any progress on the 'final project' on hold again for a little while. I've been ripped off by one person off the bluebird forums who loaded a gearbox (that I drove interstate for) into my boot late at night, and decided to keep the tailshaft yoke and the shifter from it. apart from that breaking the deal, it also leaked oil in the boot area that took a month to get the smell out. On the other hand, pretty much everyone I've dealt with here (maybe a hiccup along the way with one thing but the guy stepped up and sorted it, and I'm appreciative of that big time) has been decent.
These things take time, and even doing it 'on the cheap' take money. Meanwhile most of us have rent, or mortgages to pay, kids to feed and a hundred other things, it's just the way it goes. Naturally we get to the point of doing 10 times more discussing than building on some things, because in the end, we can only afford to do it once, so we need to get it right the first time. but back to the topic at hand: Prompted by the news that the 'genuine s/c oil is so ridiculously expensive' from supafatto - A while back I mentioned Shell donax TD oil - as being about as good as it gets for both any manual gearbox (it is used in a range of heavy agricultural machinery drivetrains) and also it would be excellent for these superchargers (and btw I'd avoid using diff oil in these chargers, there's no hypoid gears in them, and as such, they don't need the additives/combination that diffs do, and the additives to make stuff survice in a hypoid gear arrangement, aren't as ideal for regular gear/drivetrains, and also are potentially corrosive, if not to the gears and bearings, then possibly to the s/charger seals. Some seals handle diff oil fine, but not all do). If it's good enough to protect the drivetrains of equipment costing more than all our datsuns put together, believe me it'll work on our boxes and superchargers (it's around a 10w30 too if anyone cares. By the way - 'thick' diff oil at 80w/90 is actually 'rated' on a different scale, so it's nowhere near as thick as those numbers might suggest. At 100c (and in a supercharger you'll see temps soar over that) it can go thinner than 30 weight motor oil. So under actual high boost/stress situations this oil will not deteriorate in film strength as much as diff oil might. Anyhoo- that oil was superceded by shell, who have simplified their range. so I didn't know the 'new' name for it. And then I didn't know the price either. I've found the name, it's now called shell spirax S4 txm . It is available in eith a 20l or 209l drum. the former costs around $170 for 20l and the latter is somewhere around $1500 or so for the 209l. Obviously for a big farming or heavy industry 'fleet' you'd go the big drum, but a 20l would last regular guys years. I picked up some recently from blackwoods (mostly because they could get it in and they are literally just around the corner from where I work) It works out to about $8.50 per litre. Which is way cheaper (by volume) than 'official' supercharger oil. If anyone in melbourne wants some for their supercharger, or even for their gearbox, I'll happily do small amounts at cost (if the buyer provides the container to put it in) http://www.blackwoods.com.au/PartDetail.aspx?part_no=00520242 They'll happily order it in for you, but if you don't have an existing account, it'll be strictly full price paid up front before they will order it. From the time I put down the cash it was approximately 2 weeks (give or take, but there was a long weekend in there to complicate matters) to the time it was there ready to be collected. On the original question - I absolutely think the SC14 is the go for sure. You'd 'get away' with an sc12, if you weren't chasing really high boost levels and or rpms. Technically the sc12 could handle the same blower rpm as an sc14 (I would suspect, based on their design and how their difference in pumping capacity is achieved) however, since they pump less volume, the drive ratio from engine to s/c would need to be higher to get as much boost, so they'd be running into rpm related issues sooner, so to speak. Don't let me make this sound like doomsday for the sc12 - it certainly isn't and they feed the 4agze motors quite capably (a 1600cc motor after all) There's certainly some call for head studs, but I'd also (just thinking out loud here) wonder if maybe stock head gasket and head bolts (provided they are in good condition) might not be a good idea for starting with. That way, if you get the mixtures badly wrong, or run too much ignition advance at full boost/rpm, then the head-gasket can 'blow' like a sort of 'safety fuse' rather than damaging pistons etc. Obviously you still couldn't run it into detonation or pre-ignition for extended periods and have it survive, but if you were careful with the tuning/optimising and stopped when it blew the head gasket (or when you discovered it was blown) then you could 'go back' a little richer or a little less ignition advance - replace the head gasket and you're set! I definitely echo the other people's mentioning in the thread - water injection works and it works very well. It's cheap too (you can do it without having to buy a commercial kit, and would be able to put together a very decent setup with a high pressure pump off ebay http://www.ebay.com.au/itm/SHURFLO-20 ... ories&hash=item2a1eccb6d8 or similar (45psi would be plenty, and most good nozzles work well at 5-10psi (so if you had 15psi boost, you'd need 25psi, to inject in the manifold after the supercharger, but you could also inject before it, which means there's no boost pressure to overcome to spray the water, and it will also cool the lobes in the supercharger itself, so can help it run cooler. A hobbs pressure switch (around $50 on ebay, depending on what you need - it'll definitely want to be a 'normally open' one, and the switching pressure - 4psi isn't a bad place to start, you might even run 2 - one at say 4psi, and one at I dunno 15 psi, the first would power up the pump (or you can run the pump all the time as it internally switches off whenever internal pressure is up around the cutoff 45 or whatever psi. Just like on those karcher pressure washers - they are 'always' on but they switch off internally, then you pull the trigger releasing water and the pump re-engages the minute the pressure drops below 45psi or whatver). Anyhoo, you could then run a solenoid so that there's an extra injector fed in addition to the first one as boost goes above 15psi or whatever. FOr injectors - you can get agricultural spraying nozzles and fittings and run something like that, and they work well. Or you can run efi style injectors (that can be switched on and off as needed. They won't last forever spraying water, they will corrode. But if you got injectors from a wrecker and replaced them every few months it'd be cheap. Or alternatively you can run injectors that have a stainless steel pintle internally and won't corrode. IIRC they came standard on some particular mercedes models. No idea as to cost to buy them aftermarket (and I wouldn't buy em from mercedes benz as that'd likely be the dearest price for them anywhere)
#19
Re: super charger
lamb_daiquiri
Posted on: 2012/6/19 10:25
You can get even cheaper water injection on a supercharger set up. Using the manifold pressure available you can pressurise the water reservoir to squirt water into the SC inlet. Since it's a roots blower it'll actually improve it's efficiency by acting as a tip and side sealer. (Not sure how much though.) All you need is a water reservoir that can handle the boost and is airtight, a nozzle and maybe a restrictor (valve/ tap whatever you want to call it) to get the water flow right. Atomisation isn't as important in this application, just getting it distributed along the blower to some degree. So, if you used second hand or discarded parts like hose and a soft drink bottle you could about do water injection for free.
#20
Re: super charger
A14force
Posted on: 2012/6/19 12:38
The only drawback with that method is that you don't get a high enough pressure at the injector to acheive proper atomisation of the stuff being injected.
Water/meth injection works the best when the droplets are the finest possible mist. The more surface area the droplets have, the more heat they draw from the charge. (And the better they can do it) This is why when the fire service are fighting a fire inside a say a house, they'll set the branch to spray a fine mist into the air. (Albeit at great pressure, and fed from a 90mm hose) This has the best impact on drawing out the heat, and cooling things down. Likewise, if you run a higher pressure to your injector, you get a better mist. I quizzed out a mate who does irrigation systems. He said all the nozzles they use need high pressures to get a nice mist. When the pressure is too low, they just dribble. The eaton blowers are a far btter unit that the toyota ones, but their size and shape makes them an awkward install on a datto. Plus the jury is out on if the coatings on the rotors can stand having fuel passing over them or not. (I have an M62 here where the coating is begining to delamitnate. And on the blower oil thing, I found some for sale on trademe years back. Well well below what it costs full retail. It has a unique silicon-esque aroma to it. Not like RTV silicon, but more rubbery. You can view topic.
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