January 16, 200521 yr i picked up a disassembled ea81 motor yesterday (thanks Ross) and have made myself popular with 'she who must be obeyed' by laying it all out on the lounge room floor for inspection:grin: . how much can be machined off the heads before you get either valve interferance or compromised strength in the head,my aim is the highest CR i can get the inlet manifold fitting isn't an issue as i intend on fabricating one with seperate water gallerys and thermostat housing....cold inlet=more power i've got inlet with the motor so i'll use it to take templates off for bolt holes and inlet port& coolent gallerys how much bigger are the big valves in the hydrolic lifter heads and could the bigger size valves be put into a solid lifter head....would ea82 valves fit? does anyone have any numbers for their torque cam i.e lift/duration etc also do the solid lifter motors run steel or aluminium pushrods cheers for any help
January 16, 200521 yr My Gregory's service manual indicates a maching limit of 0.5mm. But I would wait for someone to come in with a fsm limit.
January 16, 200521 yr Author My Gregory's service manual indicates a maching limit of 0.5mm. But I would wait for someone to come in with a fsm limit.that works out to be 20'thou i know the flyboys take 40'thou and i fig'er aviation folks being the safety minded ppl that they are(no noise from up the front generaly means its going to hurt:lol: ) that they would leave a very heathy amount in reserve
January 16, 200521 yr Author in the short term no, we lost everything on the harddrive after we had to reinstall windows after we got virused (now i can't even upload holiday pics because it keeps coming up with some crap about some system error, i hate tecnology ) i think dad has a couple of photos from when i was building and playing with the inlet manifold but they won't be much as i only had it half done when he showed up to have a look. I'll ask him next time i see him sorry man i know there are a few ppl that want to see what it was like before the legalitys stuck their nose in
January 17, 200521 yr Supercharged dude, I have a dual port solid lifter EA81 running 9.6:1 compression, the very bottom of the J in Japan has been levelled off each head. If that makes sence to you. Have a look at a head and you will see what I mean. Major Decking, loves octane! Matt
January 17, 200521 yr So, Callum, if you put some SPFI pistons in there and plane the head as much as Matty B has, you should have a pretty useful compression ratio! Just a question as to whether the heads will stay on, but theres only one way to find that out!
January 17, 200521 yr Author So, Callum, if you put some SPFI pistons in there and plane the head as much as Matty B has, you should have a pretty useful compression ratio!Just a question as to whether the heads will stay on, but theres only one way to find that out! hmmm might have to to add spfi pistons to the shopping list, i hope my parts supplier has them listed....... mind you with them saying they have 4 different ring thickness's available,chances are looking good as for the heads staying on, i found these great things called cable ties.....
January 17, 200521 yr Have a little faith in the head studs gentlemen, this is not some lightweight EA82 here, this is the Daddy with the studs! Its got too much compression when the starter won't turn it over!
January 18, 200521 yr Author Its got too much compression when the starter won't turn it over! hell yeah...... i am just a little worry'd the spfi pistons possibly hitting the head,being that the word is they're taller in the pin to crown height what pistons are in your dual port?
January 18, 200521 yr A forged set from an EA 82 rally car, they are 4mm taller than standard. There must be some room in there. BTW my solid lifters run alloy push rods, risky or not do you think?. Where have you mounted your LPG tank? Are you on straight gas or do you run both tanks? I would like to find a gas tank to sit where the fuel tank goes...I want to keep my tray, its not mine anyway.... Groover will be pissed off if I put a tank in there. I think gas will suit my engine better, high octane fuel is not cheap and twin carbies drink it like its water!
January 19, 200521 yr i am just a little worry'd the spfi pistons possibly hitting the head You should be sweet, theres a good gap between the top of the block and the top of the piston at tdc on std ea81. Are you planning on using standard or metal head gaskets?
January 19, 200521 yr Author A forged set from an EA 82 rally car, they are 4mm taller than standard. There must be some room in there. BTW my solid lifters run alloy push rods, risky or not do you think?. Where have you mounted your LPG tank? Are you on straight gas or do you run both tanks? im on straight gas as its cheaper than petrol and i don't have the hassel of trying to tune for both (hmmmmm its actualy on jackstands at the moment so i guess its currently 'on steel' ) have you had any problems with the alloy push rods? 4mm taller than standard is a little more than i would have thought possible,....guess you learn sum'it every day it that a standard ea81 or ea82 piston your comparing to?
January 19, 200521 yr Compared to an EA82 piston (I think...I got a box of parts from a few donor cars here). No dramas with the alloy push rods, I just wondered if they were a weak point. I suppose I would rather bend one of them than snap something big. Sort of like a fuse in the circuit.. Would you recommend a swap to gas? Mileage improved at all? Come on ... where is your tank?? These are a great little motor, I give my car a good hard thrashing just about every time I drive her. (don't fret, she was built for it, run in for it and she loves it) 5000km sythetic oil changes and a good warm up first is all she asks. 650 - 700km a week, every week. I am a fan.
January 19, 200521 yr Author my tank is in the tray in front of the wheel archs, it holds 80L of lpg Gas also means less oil changes if your running top-line synthetic oil filter changes at normal intervals tho'
January 20, 200521 yr Found an LPG kit in Smellbourne, is there any major mods needed to fit it? It was set up on (another) twin carb EA81, If you can think of any traps or tips, please let me know. Good luck with the new donk, Matt
January 20, 200521 yr Author If you can think of any traps or tips, please let me know. Good luck with the new donk, Matt make sure your ignition system is in top shape as you need a really good spark see if you can get hold of a lambda fuel gas controller its basictly a butterfly valve controlled by a lambda probe that go's between your regulator and your carb, it automaticly tunes the air/fuel ratio they make tuneing a real easy try to get the reg and the carbs as close as possible so the gas doesn't have go any further than necessary between the reg and carb/s
January 20, 200521 yr This whole LPG thing is starting to sound very attractive (cheap, huge CR). Callum, where did you find all the gear? second hand or new?
January 20, 200521 yr Author This whole LPG thing is starting to sound very attractive (cheap, huge CR). Callum, where did you find all the gear? second hand or new? all second hand, the regulator in brumby came out of a nissan van so i was told, the mixer i was useing with the blower was from a 3.9 foul-coon:lol: as was the tank check round wreckers for gear that looks good or even better is still under cert
January 20, 200521 yr Author Come on, a coon part on a subie???? Should be illegal! yeah well i know..its immoral but hey what can i say, im a mechanical butcher:banana:
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