Ogre Posted August 15, 2007 Share Posted August 15, 2007 ive seen twincam 4g63 with twin 45s, so yeah it can be done, pretty sure i remember seeing 4 coilpack things, whatever they called. Water pipeing isnt hard to deal with. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted August 15, 2007 Share Posted August 15, 2007 dont they have thermostat and shit macced into inlet manifold? meh. should have a look at one sometime. also, do it. get a flange made up, chuck somepipes on it. prolly be cheaper starting from scratch than buying an evo manifold to chop Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 15, 2007 Author Share Posted August 15, 2007 Yeah, mint I forsee coilpacks too, and going for an ignition only computer sensing off the cas would be best. Gonna take ages if I decide to do it Quote Link to comment Share on other sites More sharing options...
Ogre Posted August 15, 2007 Share Posted August 15, 2007 but why use a rwd block tho?No real advantage in it.easier to just get a complete engine. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted August 15, 2007 Share Posted August 15, 2007 but why use a rwd block tho?No real advantage in it.easier to just get a complete engine. Quote Link to comment Share on other sites More sharing options...
fuel Posted August 15, 2007 Share Posted August 15, 2007 Yeah dude why bother? Seems like a whole lot of work for not alot of gains really. It would actually be easier to just go fuel injection! Not much more work to go turbo. To use DOHC head it would be a good idea to run DOHC pistons, cause otherwise the valves will probably touch the pistons (as the SOHC has indents for 3 valves, DOHC has indents for 4 valves). Also I don't think an Evo 4~8 manifold bolts straight up to the earlier head. Just find a complete DOHC N/A 4G63 out of a E33A Galant and drop that in and be done with it, none of this stuffing around with trying to mix and match heads. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted August 15, 2007 Share Posted August 15, 2007 Im down with the n/a steez eh. everyone does turb. even if it's not as fast then the n/a will still be cool jsut coz it'll likely be grumpy as. Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 15, 2007 Author Share Posted August 15, 2007 Just said rwd block cos that's what I have, but yeah, easier to just get E33 engine Am not going turbo or efi, at all. No way So, get DOHC non turbs, get inlet mani made up for whatever carbs, exhaust manifold modded, use cas on basic ignition computer with coilpacks off evo etc. Only issue would be the water lines that were in standy manifold, right? Time to research Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted August 15, 2007 Share Posted August 15, 2007 i thought the same bout waterlines etc but from the looks of things the dohc head may not have too many issues surrounding that here's isnowi's manifold. no sign of water pipes etc..... http://img227.imageshack.us/img227/9980/pict0080ue6.jpg Quote Link to comment Share on other sites More sharing options...
fuel Posted August 15, 2007 Share Posted August 15, 2007 Yeah DOHC doesn't have thermostat in manifold like SOHC does, instead it has a housing at the rear of the head above the bellhousing. This can prove a problem when going RWD. I don't know how you are going to control ignition, there's no dizzy with DOHC, only CAS and coil packs controlled by ECU. Quote Link to comment Share on other sites More sharing options...
CaMpylobacter Posted August 15, 2007 Share Posted August 15, 2007 ignition computer hard. somehow. thermostat shold be a piece of piss. remote thermo and shit. meh i dunno jsut build it to lay b-owtz Quote Link to comment Share on other sites More sharing options...
Spencer Posted August 15, 2007 Share Posted August 15, 2007 megasquirt will do it easy if your keen to learn some shit. or if the mitsi ecu's are like toyotas they will still put out a spark curve with only a handfull of senders plugged in. Quote Link to comment Share on other sites More sharing options...
fuel Posted August 15, 2007 Share Posted August 15, 2007 Yeah I imagine you can fool the ecu into thinking it's still running injectors and get it to control the ignition - problem is the ignition timing curve will be spot on for an injected system, when you slap on carbs I'm sure it'll upset the tune and the standard timing curve (which isn't adjustable by the way) will not be best suited. If you go megasquirt then shit you may as well just go injection. Seriously why transplant a DOHC head on, run aftermarket computer etc just to run carbs? I dunno about anyone else but I think this is turning into Celeste V2.0 Quote Link to comment Share on other sites More sharing options...
isnowi Posted August 16, 2007 Share Posted August 16, 2007 around 200-300 will buy a standalone ignition controller and ignitor from jaycar, kit styles, should work with cas and std wasted spark setup, and the best thing about it is that it is completely adjustable... the easiest way to get a manifold working for carbs would be to start from scratch, pay for some stainless, sort your carbs and i'll weld one up for you. Just remember that because of the port sizes etc you are going to have a pretty flat motor at low revs.. Quote Link to comment Share on other sites More sharing options...
fuel Posted August 16, 2007 Share Posted August 16, 2007 4G61 1600cc has smaller port sizes doesn't it? and smaller combustion chamber too if I recall correctly Quote Link to comment Share on other sites More sharing options...
isnowi Posted August 16, 2007 Share Posted August 16, 2007 definitely smaller port sizes, i have yet to see hard evidence of cc volume, i have heard that it is smaller, but needs work to deshroud the valves, at which point it is the same volume as a 63.... The difference is about .4 high static cr. I'm attempting to find a 61 head to fit to mine with the quads, as the intake port area is almost identical to the silver top throttle diameter, thus it would have non tapered dead straight runners.. Quote Link to comment Share on other sites More sharing options...
lowlancer Posted August 16, 2007 Author Share Posted August 16, 2007 Yeah I imagine you can fool the ecu into thinking it's still running injectors and get it to control the ignition - problem is the ignition timing curve will be spot on for an injected system, when you slap on carbs I'm sure it'll upset the tune and the standard timing curve (which isn't adjustable by the way) will not be best suited. If you go megasquirt then shit you may as well just go injection. Seriously why transplant a DOHC head on, run aftermarket computer etc just to run carbs? I dunno about anyone else but I think this is turning into Celeste V2.0 LOL Aftermarket computer of sorts, not a Microtech. And I'm not DEFINATELY doing it unless I can see it being viable and relatively straigtforward I was thinkin more along the lines of what isnowi said re: the Jaycar kit. Easy to do, people have done it before (unlike aftermarket ecu for DASH in NZ) and WAY more support for DOHC. Kinda makes sense to me. No way am i shelling out for a full blown ecu again Will investigate more re:manifold length for tuning and get back to you isnowi, and thanks for the offer to do the welding, appreciate it Quote Link to comment Share on other sites More sharing options...
isnowi Posted August 16, 2007 Share Posted August 16, 2007 I have some links on my work pc to a couple of calculators to work out runner sizes and lengths, think i've posted them on the bike carb thread in the past. Quote Link to comment Share on other sites More sharing options...
Spencer Posted August 16, 2007 Share Posted August 16, 2007 around 200-300 will buy a standalone ignition controller and ignitor from jaycar, kit styles, should work with cas and std wasted spark se that money will buy a megasquirt which has so much more control over spark than a jaycar kit its not funny Quote Link to comment Share on other sites More sharing options...
isnowi Posted August 17, 2007 Share Posted August 17, 2007 around 200-300 will buy a standalone ignition controller and ignitor from jaycar, kit styles, should work with cas and std wasted spark se that money will buy a megasquirt which has so much more control over spark than a jaycar kit its not funny That money will buy a MS in kit form, still need to assemble and add appropriate sensors, but i agree, it has much more scope for adjustability.. Or if i am wrong and a MS can be bought operational for that money then tell me where, cos i want one.... Quote Link to comment Share on other sites More sharing options...
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