fuel

OS 4 lyf boes

more respect if you work the SOHC bro, me on the other hand, I'm bailing out and going DOHC

Well up to you really. I personally would run it on 95/98 and up the ignition timing until it pinks slightly then back it off a degree or so until it stops - right there is the optimum point to have the timing. As you said you've adjusted the idle speed, this in turn could have altered the fuel mixture. At least pull the plugs out and check they are the correct ones...

Yeah I can't say I've heard of any other mitsi diffs that low, I'm curious to how you checked the ratio? Liberos are 3.545 or 3.909 I'm sure.

Mitsi diffs are usually 3.545 or 3.909 for most post 80 cars, I don't think that Libero would be 3.4. Liberos do run a solid axle, pretty sure its the same as the Lancer Cyborg 4WD ones, the early models of them have a wacky diff ratio.

It's a 1980 SOHC carb Mitsubishi - I can't seriously think of anything more basic. Pull plugs out and check what they are, if they are BP7ES chuck them back in there, if not put some in. It's a shame there's no haynes manual specific to the EX lancer but the 4G32 that's in there is the same as in the Sigmas, Galants, Chariots etc. I have a 4G37 manual in PDF form if you want it, covers fuel injected Galant engine but things like tappet adjustment procedure and setting the timing is all the same.

Oh yeah didn't think about being auto. Autos usually have low ratios like that. Could be out of an auto Sigma SE or Galant Turbo (ones with solid axle), can't be out of a Starion or Galant turbo with IRS.

the 2.9 ratio is super low, not sure if it would be out of something like an L200 etc.

Yup I'm pretty sure that EX will have an Aisan carb factory (as did all 80s and early 90s Mitsis other than Aus spec ones), just not sure if the early ones had fuel cut off solenoid

Running 91 is false economy dude, sure it's cheaper at the pump (by only a few cents) but the engine will run like complete shit compared to 95 or 98 with the ignition timed to take advantage of the higher octane fuel. 91 has a quick flash point, ie it ignites a whole heap easier and faster than 95 or 98 - something in the combustion chamber (whether it be carbon build up, too hot a spark plug, hot exhaust valve due to being stuck open or incorrectly set tappets) is igniting the fuel (other than the spark plug sparking itself). This in turn keeps the engine running, pumping the fuel pump, drawing fuel back into the cylinder (igniting on something other than a spark) - it's basically running like a Diesel engine! Adjusting the idle screw could have richened up the mixture (causing excess carbon build up), or you could have adjusted the fuel mixture screw instead of the idle screw (it happens). Do you know what the timing was set at? It should be around 5deg BTDC if running on 91, but if you run on 95 or 98 you should be able to adjust it higher. If the timing is too far retarded, the engine runs hotter than usual causing hot spots. If the tappets on the exhaust valve are too tight not allowing the exhaust valve to sit on the valve seat for long enough to dissapate heat, the hot exhaust valve could be igniting the fuel There are many factors which can cause running on, I suggest you run it on 95/98, get the ignition timing set properly, run NGK BP7ES plugs and check the valve clearances (should be 0.15mm inlet, 0.25mm exhaust when hot). Hope that helps

Yeah most likely too low an octane or incorrect ignition timing. I'm not sure if that carb uses a fuel cut off solenoid like my old '89 Galant did. Are you sure you adjusted the idle screw and not the fuel mix screw?

Pics of repainted wheels:

would that not make the wheels foul on the doors when its turning a corner? or does this thing not go around corners?

HAWT

4G61 1600cc has smaller port sizes doesn't it? and smaller combustion chamber too if I recall correctly

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

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.

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.

There's no way you'll get a SOHC inlet manifold to fit on a DOHC 4G63. The VR-4 4G63 has large ports while the Evo 4G63 has smaller ports, but both are squarish. You can cut and shut a manifold to suit RWD.

Haha nah they used to me gettin my slouch on

So glad I can put my elbows up at home without being hassled

Haha that was me boes

Wideblock is RWD Turbo only (ie my Eterna, Starions etc), and some of the 4G54's. We are talking about the 4G63 SOHC N/A carb in his Sigma Wagon, and a 4G63 SOHC injected out of a E33A shape Galant - both narrowblock.

Blocks are the same, infact so are the heads on that shape Galant. Only difference being higher compression pistons and multi point fuel injection (I can't remember if they have a blanking plate to block off fuel pump hole or the heads are just not cast with that hole). Oh and the cam will be different profile. So grab the later model SOHC 8V engine, use your head on that block, with the later model camshaft. Would be a good base to chuck twin carbs/sideys on. The 4G63 remained relatively unchanged from its introduction in 1980 up until 1992ish when they changed to the newer 7 bolt block.

they are all lemons. oh snap! Donna (HUNTD) would be the girl to ask (if she even comes on here anymore) as she has a '77 cunter 1725. As far as I know there can be problems with the alloy head 1725cc models with blowing head gaskets. Being an english car it's bound to leak oil (to self lubricate the chassis of course ).