flyingbrick Posted February 6, 2015 Share Posted February 6, 2015 Factory manifolds are proof that you can get away with designs much less than perfect Quote Link to comment Share on other sites More sharing options...
Roman Posted February 6, 2015 Author Share Posted February 6, 2015 Yeah some factory manifolds look pretty dreadful! But still do the job well enough. Quote Link to comment Share on other sites More sharing options...
dave123456789 Posted February 6, 2015 Share Posted February 6, 2015 As I have now bent a couple of runners they have squashed a tiny bit so not nice and smooth on the inside. Im sure this wont make a huge difference either? To bend them I cut some slits and just smashed it over to where I wanted it, then welded it back up so who knows what the inside looks like Either way its going on the car like this Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 10, 2015 Share Posted February 10, 2015 Saw the old Ja steam trains in Dunners. Tractive force blah blah blah 110kN 110kph. So is the conversion to hp force x distance x speed? Or is the assumption of max force at max speed not legit? Quote Link to comment Share on other sites More sharing options...
Rookie Posted February 10, 2015 Share Posted February 10, 2015 To convert to Nm you will need to know the wheel diameter. From there you will be able to do Hp as you will be able to work out RPM. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 10, 2015 Share Posted February 10, 2015 But that's just converting to distance, and back again via ω? Work = F x d, and P = F x v but 110kN x 30.5m/s ~3MW, 4000hp, which sounds too high. I was expecting 500-1000hp. Quote Link to comment Share on other sites More sharing options...
Brock-Lee Posted February 10, 2015 Share Posted February 10, 2015 1 Quote Link to comment Share on other sites More sharing options...
Brock-Lee Posted February 10, 2015 Share Posted February 10, 2015 Lol just realised that is in silly units. Need me some non murica spec pages. Quote Link to comment Share on other sites More sharing options...
Rookie Posted February 10, 2015 Share Posted February 10, 2015 Power (kW) = Torque (N.m) x Speed (RPM) / 9548.8 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 11, 2015 Share Posted February 11, 2015 d = 1.38m, so 110kN @1.38m/2 = 40kNm 110kph = 30.5m/s, so 30.5 / (3.14 * 1.38) = 7rps, so 60 x 7 = 420 rpm... Power (kW) = Torque (N.m) x Speed (RPM) / 9548.8 P = 40kNm x 420 / 9548 = 1700kW ~= 2300hp Still sounds a bit high, the really big Chinese / American steamers topped out at 3000hp 6000hp, I think. Edit: There's the problem, that initial assumption. 7MW curves: http://en.wikipedia.org/wiki/Tractive_force Quote Link to comment Share on other sites More sharing options...
Brock-Lee Posted February 11, 2015 Share Posted February 11, 2015 http://en.wikipedia.org/wiki/List_of_largest_locomotives Quote Link to comment Share on other sites More sharing options...
Testament Posted February 24, 2015 Share Posted February 24, 2015 Dry sump pumps 4 stage vs 3 stage vs 5 stage. can you have too much stage? is there much benefit in scavenging from camboxes/rocker covers? 1 Quote Link to comment Share on other sites More sharing options...
Rookie Posted February 25, 2015 Share Posted February 25, 2015 If your head fills with oil then yes, otherwise no. Quote Link to comment Share on other sites More sharing options...
sentra Posted February 25, 2015 Share Posted February 25, 2015 can allways bolt more stages on? Quote Link to comment Share on other sites More sharing options...
fletch Posted February 25, 2015 Share Posted February 25, 2015 Anybody here done any work on cng compressors? Got some issues with one that's been dumped on me. Mostly temp related once we are over 160 Bar. need somebody to chime in about valves and how they should look. Photos tomorrow maybe. 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted February 25, 2015 Share Posted February 25, 2015 can allways bolt more stages on? only if you have laser scanned your engine and engine bay, and you are a total masochist. 8v twincam fiat runs the cams in an oil bath so im guessing its probably not a great idea/would just suck all that oil out and cause cam wear. 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 28, 2015 Share Posted February 28, 2015 Laser ignition improves efficiency. http://www.thetruthaboutcars.com/2015/02/princeton-optronics-laser-ignition-boost-ices-efficiency-27/#more-1008890 I wonder what engine was igniting 27% badly. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted March 1, 2015 Share Posted March 1, 2015 They explain the traditional sparkplugs drawbacks within that article. Its easy to see how a laser could improve things. Damn cool Quote Link to comment Share on other sites More sharing options...
peteretep Posted March 10, 2015 Share Posted March 10, 2015 this is a better place for this my new car is 'zippy' when cold/warm up enrichment is happening, but slows down to grandma pace once mildy warm. what could cause this? Quote Link to comment Share on other sites More sharing options...
Rookie Posted March 10, 2015 Share Posted March 10, 2015 running lean, needs the extra petrol to make powers. Turn up the FPR and see if it makes a difference? Quote Link to comment Share on other sites More sharing options...
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