anglia4

They are fricken amazing. I did a week work experience at motorsport solutions, got to polish a Lola T430. You get a whole new appreciation for the detail of them when you have to polish every surface on it! Namely i can remember metal polishing the alloy wing that is bigger than my dinner table!

I'll just have to make sure i'm well studied up for my exam then! Exam is at 2.30 so should be able to at least see some racing first.

is that meeting over the sunday as well? Is that John Ray's old Torana? I'm keen as mustard to go to that meet but have an exam on the saturday

that is mint! Carpet looks like my nanas house luvit

no not my anglebox in the pic, thats pretty much what mine will look like when its finished though. just an inspiration pic

car is looking good! agree with you though, doing something on one side and getting it looking mint and then having to do it again on the other side is the shits

Whats the definition of 3d mapping? The autosport labs website does say they are 3d but are they maybe a borderline version of it? I haven't done alot of studying on the subject yet coz im along way from ever wiring it up or starting the car. From what i gather though you map the revs on one axis and tps on another and then give it an advance for each coordinate. i think then you can also change it so that it alters the advance for different temperatures as well but not so sure on that one.

The megajolt i've got has TPS and is 3d mapping.

yeah the blower performance map has efficiency plots on it

ah good point!

ok flag that last post! http://www.eaton.com/EatonCom/ProductsServices/PerformanceProducts/Products/Superchargers/ the calculator on this page for eaton superchargers is awesome! gives theoretical dyno charts

all right then i'll try find out for myself again from the info i have gathered from this site (god only knows how reliable it is): http://ezinearticles.com/?Supercharger-Calculators-Explained&id=3201927 according to this it looks like horsepower is proportional to the amount of air that the engine gets. So they base it around a density ratio. If my engine is originally 150hp and i want 220hp then i have a density ratio of 220/150=1.46666 If T2 is the compressor outlet temp in degrees kelvin and T1 is the comp inlet temp in deg kelvin then T2/T1 = Pressure ratio/density ratio so if the air inlet is at ambient ~25 deg c then T1 is about 300K and if the air outlet is intercooled to keep it within 50 deg so T2 is about 350K 350/300 x 1.46666 = pressure ratio so the pressure ratio is about 1.71 That relates to a boost pressure of about 10psi which seems realistic. and then using the horsepower/airflow calculator on this page: http://www.rbracing-rsr.com/turbotech.html for 220hp i would need 0.1557 cubic metres per second which is 560 cubic metres per hour Dunno how much i trust that calculator though coz it doesn't take into account any pressures, it gives it in either cubic meters per second or kg per second but the conversion between them depends alot on the pressure so i don't really trust that. will keep searching. So far anyway though it looks like i'm on a useable part of that eaton performance chart

Does anybody know the tech about doing the relevant calculations to spec a supercharger? I've been surfing ebay and Eaton M90 superchargers are cheap as (would be seriously tight to fit in the anglia bay but hey thats not the point!) I've been on the eaton website and found the performance map for them: http://www.eaton.com/ecm/groups/public/@pub/@eaton/@per/documents/content/ct_128485.gif I've got the pressure ratio part sorted, its the absolute outlet pressure divided by the absolute inlet pressure. So for about 11psi you need a pressure ratio of about 1.7. The green line is the rpm of the supercharger and the blue lines are the efficiency. Is it right to calculate the flow rate as just the engine capacity multiplied by so many rpm? I.e my car is 2.0 litre so at 6000rpm is it right that it would be consuming 12000 litres per minute? so 12 cubic metres per minute or 720 cubic metres per hour? meaning that for my application i would need the charger spinning at 9000rpm and have an efficiency in the charger of 59%??

this thread makes me want a z. they are just porn!

yup got the megajolt all sorted and in my bedroom back home. Dad built it, so its untested but hopefully will work! Am sourcing my bike crabs at the mo

thanks for the input bubblegoose! I'll be running a megajolt for the ignition side of things

some useful info here too, particularly at the bottom relating to fuel pressure and regulation http://unclebobsturbos.com/newbie.html

had a bit more of a look around this site and found that this bike is running about 14psi boost, so looks like the carbs might well be able to handle the 8-10 that im thinking

fixed the wall of txt haha sorry bout that one guys! yeah would be interesting to know if the seals can handle the pressure. As far as the float imploding, i read somewhere on the net tonight, someone had the idea of drilling a hole in the float and filling it with foam to give it strength and then brazing or soldering or whatever to cover the hole back up again. Just another idea to throw into the mix.

don't have an oldschool car down here anymore would anybody mind if i rocked up in the orange muzzy shown below

thats a mint looking fastback in the background, loving the ride height of it!

also found this on another site, relates to carbs in general but explains all the fluid dynamics theory:

found some good info on how to ballance it out: http://www.turbo-bike.net/Pressurize%20carbs.htm

have just been doing a bit of googling, have seen it mentioned a couple of times about pressurizing the float bowl. will keep searching, would be fricken awesome i reckon if it could work.