coronan Posted October 8, 2014 Share Posted October 8, 2014 I'm calling this the lazy man's swap. Easier and less time consuming than a EJ swap. No dash swap required. ect... I have an EA81 Turbo in my 82 brat. Can I swap in a EA82 turbo long block and run it with the EA81T sensors and ECU. My EA81T has MPFI with 4 injectors. The Dizzys are on opposite sides. I anticipate lengthening some wires here or there. Will it plug and play? What else would be involved???? Why do it? Because its 30 more HP and it can be done in a weekend. No? Nomex is on. Link to comment Share on other sites More sharing options...
skishop69 Posted October 8, 2014 Share Posted October 8, 2014 I would have to say no. Different sensors and some of them read differently. Then there is the fitment issue. Someone else will bring up the why oh why would you replace the much more dependable EA81 for an EA82. The 30hp gain wouldn't be worth the future problems you may incur. IMO... Link to comment Share on other sites More sharing options...
Crazyeights Posted October 10, 2014 Share Posted October 10, 2014 The EA82T is heavier and not any more reliable than the EA81T was. This would be a down grade in my opinion. Is the stock engine no longer saveable? Those are somewhat rare. Good Luck! Link to comment Share on other sites More sharing options...
Gloyale Posted October 10, 2014 Share Posted October 10, 2014 It would work with a First gen EA82t intake and disty. Along with alot of rewiring harness, routing intake tube etc....Doubtful it would be a weekend project And I also have to ask.....Why? EA82 turbo is not 30 hp more than EA81 turbo. EA81T is 95 hp and EA82t is 110. EA82t heads all crack from water jacket into exhaust. EJ swap does not require a Dash swap of any kind...Do an EJ swap. Link to comment Share on other sites More sharing options...
jono Posted October 10, 2014 Share Posted October 10, 2014 I think the point may be missed. I think Coronan wants to swap all his EA81T sensors over to an EA82T that has would have its own sensors stripped for the project. I am one to encourage you to try it, - part of what this forum is about - tangental thinking leading to actions , hoping for back up support from anyone in here if /when you get stuck. I am betting the TPS is not going to be interswappable, so maybe the EA81T throttle body will need mounting to the EA82T inlet manifold and that might require new stud holes or welding adaptor plate. I would like to think that the 4 pin ign module inside the two dizzies exactly the same, same wiring code and sequence so maybe even flog the EA81T ign module and screw it into the EA82T dizzy of the flapper style 3 plug ecu EA82T ? Has anyone compared weights between EA82 and EA81 ? 82 is sure heavier, with double the cams and one is longer, cam boxes, four port inlet is bigger and heavier. Use EA81T TPS Use EA81T Knock sensor Use EA81T Temp sensor for ECU Use EA81T flapper ECU Do the injectors swap in directly ? 2 Link to comment Share on other sites More sharing options...
Gloyale Posted October 11, 2014 Share Posted October 11, 2014 (edited) Use EA81T TPS Use EA81T Knock sensor Use EA81T Temp sensor for ECU Use EA81T flapper ECU Do the injectors swap in directly ? Temp sensor, TPS, And Knock unit for EA82 will be compatible....if he's got a complete intake......he could just match wires in the plug. Edited October 11, 2014 by Gloyale Link to comment Share on other sites More sharing options...
MilesFox Posted October 11, 2014 Share Posted October 11, 2014 the 1985 and 1986 ea82t is schematically similar to 83-84 ea81t electrical schematics. This is assuming intake manifold and sensors and with any ea82t or mpfi long block. Possible to make a non turbo with XT motor. My personal opinion is, if you are adamant about making the retrofit, I would like to see if it works. Thanks. Link to comment Share on other sites More sharing options...
wagonist Posted October 12, 2014 Share Posted October 12, 2014 You've checked the engine fits between the chassis rails? Because every EA82 into EA81 conversion I've ever seen has required the rails to be cut, sectioned & welded. Can be done quickly if you have the correct tools & know where to cut. As for the wiring, I'd like to see it done also. You need to check if the EA82 injectors are of the same impedance range as the EA81 versions. No point to use the EA81 injectors as they are rated for an engine with less power. And with the flapper type AFM, you can do changes to the mapping. Link to comment Share on other sites More sharing options...
Gloyale Posted October 12, 2014 Share Posted October 12, 2014 You've checked the engine fits between the chassis rails? Because every EA82 into EA81 conversion I've ever seen has required the rails to be cut, sectioned & welded. Can be done quickly if you have the correct tools & know where to cut. As for the wiring, I'd like to see it done also. You need to check if the EA82 injectors are of the same impedance range as the EA81 versions. No point to use the EA81 injectors as they are rated for an engine with less power. And with the flapper type AFM, you can do changes to the mapping. EA82 fits fine in EA81 engine bay. It's the EA71 chassis that needs cut. injectors are the same. Link to comment Share on other sites More sharing options...
MilesFox Posted October 13, 2014 Share Posted October 13, 2014 Yes an ea82 fits. It can be easier to remove the distributor to clear the master cylinder upon installation, but this is relative to MT with hill holder, but a good tip to remember. otherwise it fits well. Use an ea82 radiator Link to comment Share on other sites More sharing options...
jono Posted October 13, 2014 Share Posted October 13, 2014 (edited) You've checked the engine fits between the chassis rails? Because every EA82 into EA81 conversion I've ever seen has required the rails to be cut, sectioned & welded. Can be done quickly if you have the correct tools & know where to cut. As for the wiring, I'd like to see it done also. You need to check if the EA82 injectors are of the same impedance range as the EA81 versions. No point to use the EA81 injectors as they are rated for an engine with less power. And with the flapper type AFM, you can do changes to the mapping. OUCH ! Another one who has the skinny EA81 chassis :) or were these EA81 bodies lifted at all ?? I have dropped EA82 OHC engine into 2 EA81 bodies now, seen two others - all of standard height suspension and they fit in between the rails - just! With a mid size hammer to knock the rails about - I have about 6mm clearance on one side, about 3mm on the other side. I have even seen a twin cam EJ sitting between massaged EA81 rails - in the flesh ! Wouldn't it be easier just to bump the EA81 bost pressure up to about 10 psi ? Adding an EA82 to EA81 body also needs EA82 clutch pedal fitted to the pedal box if you are using EA82 gearbox, and mod for the clutch cable to pedal box OR make an EA82 pedal box fit to EA81 body, use maybe EA81 acc pedal. Pedal box needs extension for top bolts to steering column area to fit. If staying with EA81 gearbox you need to address the different clutch bits. EA82 cover plate is 21mm step, EA81 is 23mm. What siz clutch dia in use etc ..... Edited October 13, 2014 by jono Link to comment Share on other sites More sharing options...
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