Mr K
Posted a lot
Posts: 2,993
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Feb 12, 2007 12:41:57 GMT
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I was wondering how hard it would be to build my own dyno, i know it will never be very accurate compared to a pukka one, but would mean i could bench test engines and tinker and get an idea as to what works and what doesnt.
i realise i would need some kind of load, any ideas?
feel free to post pics of sexy engines on rigs!
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Feb 12, 2007 12:49:14 GMT
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"we race cars here, not dynos"
best dyno is the open road...
But if you do manage to build your own let me know!
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Feb 12, 2007 12:53:30 GMT
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I'm sure I read about one once made out of a fork-lift truck axle. The load was applied by operating the big drum brakes on it!
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT! |
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Feb 12, 2007 14:33:27 GMT
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wicked idea, go for it mate, no idea how u could do it tho
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bstardchild
Club Retro Rides Member
Posts: 14,962
Club RR Member Number: 71
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DIY dyno......bstardchild
@bstardchild
Club Retro Rides Member 71
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Feb 12, 2007 14:47:30 GMT
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Can't you just use one of those performance data logger things G-Max or summut - seen em for sale before - might be ebay might be other forums....
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Feb 12, 2007 14:57:17 GMT
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the BHP calculator on them is rubbish though.
But they do a good job of measuring 0-60 and 1/4 mile etc. which is really what matters.
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Nathan
Club Retro Rides Member
Posts: 5,650
Club RR Member Number: 1
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DIY dyno......Nathan
@bgtmidget7476
Club Retro Rides Member 1
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Feb 12, 2007 14:59:52 GMT
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Is the new G-Tech not supposed to be within 5% of actual figure?
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Feb 12, 2007 15:53:44 GMT
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yes, however you need do derive a correction factor for your car based on its aerodynamics and a bunch of other stuff. There was quite a detailed piece on the net by some chap who'd gteched and rolling roaded a bunch of cars. Bottom line seemed to be that it was kinda too much trouble and you need to check a baseline against a rolling road anyway to ensure you are correcting correctly.
I don't know if any more recent versions fo the gtech do any better but I don't see how they can calculate for external forced when all you do is give the vehicles weight (and that can vary by a fair amount due to fuel load or whatever)
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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Feb 12, 2007 17:24:05 GMT
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dyno's are for tuning not racing  ... they just happen to output a figure so that you can compare runs and make sure you are making improvements. Much more control than tuning on the road and much much safer ! |
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Feb 12, 2007 21:31:00 GMT
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I have some basic diagrams of a water brake dyno in my college stuff, may take about 5 months to find it tho  sorry. think you can do so comparative testing and such on a water brake, but to map ecus with a constant load, you really need an eddy current electric brake dyno I beleive. I thinks thats right, I'm sure dom will be the one who's going to know. home build dyno sounds interesting but may unfortunatley fall flat on its ass. go on, do it, it'll be a laugh  at the outside it might even work to some extent  |
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loon
Posted a lot
Posts: 1,092
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Feb 12, 2007 23:00:40 GMT
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dyno testing on the open road is not a good idea as the bonnet is going to flip up when your adjusting the carbs or dizzy it'll get messy lol |
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what the fcuk have you done lately
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... they just happen to output a figure so that you can compare runs and make sure you are making improvements. Much more control than tuning on the road and much much safer !
sorry. 
at the outside it might even work to some extent 
