Enbloc
Part of things
Posts: 353
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Feb 19, 2008 17:15:15 GMT
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**I punted this around a couple of the Hot Rod forums a couple of weeks ago, but thought some of you guys might be interested in seeing it.** Just come back from running my banger roadster on the rolling road. Not much to report in regards to changes as the only change was slightly bigger power valves. Fuel and ignition was un-changed so it ended up with a few power runs. Heres the 'perts setting up all the sensors and strapping the car to the road.  Strapped down and ready to go...  More stuff connected to the car to read all the vitals.  Clash of era's! The screen is showing two power runs lapped over each over to compare various points in the curves.  How the car sits on the rollers.  Heres the vids. First vid is pretty slow and boring. Basically getting the road and car in sync with each other. Second vid shows a power run that went wrong! I had turned the fuel tap off for changing the power valves and forgot to turn it back on again! Final vid and power run. Vid was taken from a different position obviously! Final outcome.... 114.3 BHP @ 3910 rpm (98 mph) 188.8 lBft @ 2450 rpm |
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Enbloc
Part of things
Posts: 353
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Feb 19, 2008 17:16:11 GMT
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This is the print out from the afternoons activities.  The lines of interest here are the blue, green and yellow. Blue shows the torque produce over the rev range and the green is power at wheels (bhp). Both are nice, straight, uninterrupted lines. You can't ask for more than that. The yellow line is the air/fuel ratio over the rev range. Things get interesting here particulary if your running Stromberg 97's. The ratio is fairly constant over the rev range until the top of the rev range then the carbs run lean. There are several possibilities suggested for this: Lack of decent air filters/ no air filters. Most carbs are designed to run with a filter, even the antique "97". Bigger power valves. The power valves supply fuel enrichment on full throttle. It could be a basic design flaw of the carb. A problem more common than you'd think even with much newer carbs. Correcting this problem involves modifying the carb with an auxiliary "main jet" that serves the same purpose as the power valve and only becomes functional at full throttle/high revs. |
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Feb 19, 2008 17:20:24 GMT
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Loving that torque curve.
That's a LOT of torque for a 4cyl, top job! ;D
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1982 VW Rabbit 4-door (apart)
1992 Passat Wagon Syncro (daily)
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Enbloc
Part of things
Posts: 353
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Feb 19, 2008 17:32:22 GMT
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Loving that torque curve. That's a LOT of torque for a 4cyl, top job! ;D Yeh, thats what this engine is all about. The power output itself is pretty un-impressive, but its the torque that makes it go. |
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slammed 230te merc
Part of things
step aside german invasion {hitlers personal ride}
Posts: 218
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Feb 19, 2008 18:25:25 GMT
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wheres the small block? nice car mate when is the exacutioners spring riot at the ace cafe start?
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spock
Part of things
...nothin a hacksaw could'nt sort out
Posts: 63
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Feb 19, 2008 21:36:34 GMT
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cool
impressive figures...just got to get that 98mph by the end of the strip and it'll slay em ;D
4 cylinders are cool
spock
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kevfromwales
Posted a lot
the conrod's REALLY out the block now!
Posts: 3,909
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Feb 19, 2008 21:38:51 GMT
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you going to the swap spock mate?
and did you get the pop sorted eventually???
- kev
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Almost on the road: b11 sunny breadvan, e36 tds, 325i skidcar,
nearly there: ford f250 tathauler, suzuki alto, u11 bluey
not for a while: ford pop, 32 rails,
not in this lifetime: ruby, '29 hillman
''unfortanatly I'm quite old and scruffy and in need of some loving. my drive shaft needs a new boot....''
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Seth
South East
MorrisOxford TriumphMirald HillmanMinx BorgwardIsabellaCombi
Posts: 15,515
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Feb 19, 2008 21:41:28 GMT
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Follow your dreams or you might as well be a vegetable. |
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spock
Part of things
...nothin a hacksaw could'nt sort out
Posts: 63
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Feb 19, 2008 22:10:56 GMT
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you going to the swap spock mate? and did you get the pop sorted eventually??? - kev yes mate...pop's ok now.....but it'll probably be knackered again by the w/end. swap meet-definetly |
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kevfromwales
Posted a lot
the conrod's REALLY out the block now!
Posts: 3,909
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Feb 19, 2008 23:31:48 GMT
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cool - see you there!
cooooool A btw!
- kev
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Almost on the road: b11 sunny breadvan, e36 tds, 325i skidcar,
nearly there: ford f250 tathauler, suzuki alto, u11 bluey
not for a while: ford pop, 32 rails,
not in this lifetime: ruby, '29 hillman
''unfortanatly I'm quite old and scruffy and in need of some loving. my drive shaft needs a new boot....''
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Enbloc
Part of things
Posts: 353
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cool impressive figures...just got to get that 98mph by the end of the strip and it'll slay em ;D 4 cylinders are cool spock Spock, Is that Darren Harts old coupe in your avatar pic? |
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Feb 20, 2008 10:29:39 GMT
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I was going to say, I saw this beasty in Nottingham a few days back (Friday was it?)
Some guy in a Bentley nearly hit other traffic doing a double take.
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1937 Austin Street Rod - 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 - 1976 Rover V8 - 1994 Ford Fiesta
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Seth
South East
MorrisOxford TriumphMirald HillmanMinx BorgwardIsabellaCombi
Posts: 15,515
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Feb 20, 2008 10:34:38 GMT
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Where was that rollling road 4ever? Presumably they were familiar with older stuff....
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Follow your dreams or you might as well be a vegetable.
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Feb 20, 2008 11:15:09 GMT
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I conclude the carb on my banger runs really lean at the top end. I get detonation problems at revs and what and the only thing I haven't managed to change now is the mixture at the top end because it's a plain venturi with a single jet.
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spock
Part of things
...nothin a hacksaw could'nt sort out
Posts: 63
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Feb 20, 2008 16:44:28 GMT
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yes that certainly is Arty's old coupe.
he lives around the corner,he was always bringing it around here trying to make it go faster(bigger elastic bands,stuff like that)or just to see if there was any way of stopping the oil coming out of every possible gasket ;D ;D ;D
so are you gonna blow his doors off this year...well..his flying hat at least
spock
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Feb 20, 2008 17:03:57 GMT
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Where was that rollling road 4ever? Presumably they were familiar with older stuff.... Nope its Track and road in Rainham  ;D Bloke on left is Steve Greenald and bloke on right is Steve Pitcher Arguably the best Rolling road in the country, very accurate and correlates to Rousch`s Engine dynos as well Most importantly the results are repeatable and its run by 2 of the best guys in the business....... A lot of "Big Name" Tuners engines are set up by the 2 steves, either on the Rolling road or on the Engine dyno they have there They don't always tell you what you want to hear, but they will be honest with you My Kadett made 36hp at the rear wheels there ;D which Jane delighted in telling me Was "Less than her Bike" ;D The Kadett and/or its engine will be set up there soon I hope..... Steve has offered me some time on the engine dyno if I want to do it that way ;D |
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Enbloc
Part of things
Posts: 353
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Feb 20, 2008 21:31:16 GMT
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^^ Eerrmm... What he said! ^^
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