cute wee gem Posted August 21, 2007 Share Posted August 21, 2007 0 hy guyz! i gt sum qs Can you run dizzyless ignition with carbs? like crank angle sensor + some fancy ignition? or do you have to run an ecu for timing etc? Also, would there be much difference between 40mm flatslide bike carbs and 40mm itbs? (minus runner length/manifolds etc from the question) And has anyone done diy crank lightening/knife edging? and did you do it with a lathe or what? tnx f0 th hlp guyz! Quote Link to comment Share on other sites More sharing options...
thminiman Posted August 21, 2007 Share Posted August 21, 2007 fuckin angle grind that shit boe re: crank talk to gman for some tips etc Quote Link to comment Share on other sites More sharing options...
Mike-e Posted August 21, 2007 Share Posted August 21, 2007 1.Can you run dizzyless ignition with carbs? like crank angle sensor + some fancy ignition? or do you have to run an ecu for timing etc?2.Also, would there be much difference between 40mm flatslide bike carbs and 40mm itbs? (minus runner length/manifolds etc from the question) Yus you can run dizzyless with carbs. you'll need a ecu to do it. although, why do you want to? yes theres lots of difference between carbs and quad throttles. Quote Link to comment Share on other sites More sharing options...
cubastreet Posted August 21, 2007 Share Posted August 21, 2007 google megajolt light jr Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 Yupp use the factory CAS like what I'm planning to do as the DOHC 4G63 doesn't use a dizzy. If it does have a dizzy, but you don't want to use it as a means of spreading spark, use just chuck a cap on it and use it purely for the reference (assuming it is electronic) and use an ignition computer. Main advantage is simplicity and reliability compared to point style dizzy, and the fact you can use a wasted spark set up, ie: individual coilpacks for cylinders=fatter and more consistent spark as the coil doesn't need to be charging and sparking as hardout as with dizzy setup. Carbs vs ITBs? Carbs are slightly more novice style I guess. More power and economy with ITBs. I suggest you do some reading on CAS's and dizzys and coils and shit. I didn't and it helped mad\ke the Celeste turn into a nightmare that I couldn't deal with Quote Link to comment Share on other sites More sharing options...
Goat Posted August 21, 2007 Share Posted August 21, 2007 Like Mike-e said with dizzyless. Why would you want to if you have a working dizzy. Cos youd need an ecu etc although you can get ignition only ecus. But then you may aswell go injection. I would think injection would be better than carbs performance wise. But theres someting inherently sexy about multiple carbs Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 Like I said boe^ Coilpacks are just inherently better Can spend a hundred bucks on an ignition computer, and a couple hundy on carbs. Manifolds are easy cos they don't need a flange to attach toas such, I think Richie got quote bout 150 VS $400 plus for a build it ya self ecu, plus fabrication for manifold, plus tbs, plus mad tuning. Depends what you're prepared to spend. No doubt itbs are better in everyway (bar cost) but it just depends on your budget and knowledge Quote Link to comment Share on other sites More sharing options...
Goat Posted August 21, 2007 Share Posted August 21, 2007 True. Coil packs FTW i was writing my post while you posted so missed explination off topic/Should convert jag to coilpacks. 12 of them Quote Link to comment Share on other sites More sharing options...
peteretep Posted August 21, 2007 Share Posted August 21, 2007 do itbs actually give more performance? I thought it was just better economy, and more reliable You may want to go without the dizzy because you cant run a vacuum advance, even if you connect up all 4 inlets, it wont work properly. But you can still use vacuum brakes using only 1 inlet Have you got r1 carbs lowlancer?? where and how much you pay? Im looking at bike carbs and just set the dizzy to run best at around 5k rpm with no vacuum advance, coz im a chap dude Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 Nah I don't. Might sort some later but just gonna try retro fit some others I got. People asking way too much for them vs others for my budget Quote Link to comment Share on other sites More sharing options...
peteretep Posted August 21, 2007 Share Posted August 21, 2007 yeah I think ill get some from the states or uk, only a few hundred delivered, just need to do wof and reg for my motorbike and car at the same time, sucks for the bank Quote Link to comment Share on other sites More sharing options...
mikuni Posted August 21, 2007 Share Posted August 21, 2007 Don't know what engine you are using so I'll answer according to Opel stuff which I did a (lazy ) year of research on to try suss my shit out. To run R1 carbs on an Opel C20XE you ditch everything relating to loom/ecu/intake etc and find a Camira so you can use the old electronic ignition, with no ecu etc. I imagine you'd be able to apply this principle with any carbed/fuel injected engine if they came with both. For my engine it uses Crank and CAM angle sensors and had no area for a dizzy. Afew of the fellas over in the UK actually run a Dizzy off a belt on the front using the same method as above. I tried hard out to justify just running electronic ignition of some sort with MSD ignition or something similar but I couldn't really do it. In the end if you want to go cheap and simple, buy a megasquirt and 4age 20v throttles and you're away. I almost guarantee it will cost you less in the long run and as soon as you begin tuning you will thank your lucky stars that you aren't fucking about with carbs. At the same time, bike carbs are just so fucking cool As far as performance goes, if you had 4 carbs that were 40mm and 4 throttles that were 40mm, the manifolds were perfect, jets were exactly right in the carbs, injectors were exactly right on the itbs, and all conditions and tuning were perfect, in theory you might be able to get the carbs to allow the engine to run as good as injection and make similar power, but probably not. Look at bike engines. Years and years of developement on carbs and many manufacturers are even still using them, but the power figures between carbed and injected engines that are otherwise identical speak for themselves. Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 Yeah, it'll run better. But it'll cost ya, comparatively Quote Link to comment Share on other sites More sharing options...
Mike-e Posted August 21, 2007 Share Posted August 21, 2007 And has anyone done diy crank lightening/knife edging? and did you do it with a lathe or what? not something you want to moleste unless you know what your doing. why do you want DLI what are you trying to achieve? Yupp use the factory CAS youd be lucky! not all motors are as well equiped as a fourgeesextyfree Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 That was in the case of having a CAS Quote Link to comment Share on other sites More sharing options...
cute wee gem Posted August 21, 2007 Author Share Posted August 21, 2007 cheers LL, brad etc Basically mike-e I may be using an engine with no dizzy standard and wanted to run carbs but up till the last week of research I've started to go off the idea as its started to turn out less simple than expected Obviously theres alot of difference... Maybe I should have rephrased that to the difference in driveablilty and power delivery/general power etc. Most bike carb setups tend to be a bit sluggish low in the revs from what I've seen? Quote Link to comment Share on other sites More sharing options...
Mike-e Posted August 21, 2007 Share Posted August 21, 2007 what motor is it cunt Quote Link to comment Share on other sites More sharing options...
cute wee gem Posted August 21, 2007 Author Share Posted August 21, 2007 not something you want to moleste unless you know what your doing. This is why I asked. Since I hear the gman takes to them with angle grinders Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 21, 2007 Share Posted August 21, 2007 Is it G200? Runner length impt as. Longer they are, more torque downlow essentially, but all dependent on situation to situation Quote Link to comment Share on other sites More sharing options...
Guest sexychevette Posted August 21, 2007 Share Posted August 21, 2007 not g200 cos cunts already got flash electrictronic ignition dizzy conversion kit thingy on that thing. Oi ke-lowfullabro if ur takn out the g200, du u want to sell me the fancy ignition shit that mat put in it? Quote Link to comment Share on other sites More sharing options...
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