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Valve head sizes
Posted 03 January 2004 - 09:38 PM
Posted 03 January 2004 - 11:06 PM
OHV engines were the EA61 (1400cc?), EA71(1600cc?), and EA81 (1800cc) aka 1781actual cc's = 1.8L OHV engine
the EA82 is the OHC (IIRC) = 1.8L which is also a 1781cc engine
so to ask if the 1.8L OHV and the 1984-88 OHV are different I'd believe they are one and the same. How ever as I'm not sure how *old* you rrefering to then I guess we will wait and see if the Old School folks like the Hatch Patrolers and Subaru3 down here in Texas will chim in with the correct info as I'm sadly lacking in that datamine.
Posted 03 January 2004 - 11:40 PM
Posted 03 January 2004 - 11:47 PM
Posted 04 January 2004 - 12:04 AM
The EA81T is basically the same as the EA82T - just different valve train - using the EA81 as the core motor. It has a lower compression (7.7:1 instead of 8.7:1), and it originally came with an oil cooled and oil lubricated turbo. There was a recall to upgrade them to water cooled / oil lubricated turbo's.... they are comparitively rare (only built in 83 and 84), so parts (especially heads) are pretty hard to find now.... they make 95 HP stock compared to the 73 HP of the normal EA81.
My personal preference is for the regular EA81 - they can be turned into quite a beast with a cam grind, head deck, and EA71 pistons (yeilding something around 9.5:1 compression), and a weber with a free flowing exhaust - looking at around 125 HP, or more with not much work at all really. The EA81T can run higher boost, and an intercooler for more HP, although there's not been enough of these modded to know much about what they can do. One thing to say - they are not much good off-road because it's hard to keep the turbo spooled. No torque on the low end.....
Posted 04 January 2004 - 01:05 AM
Posted 04 January 2004 - 01:13 AM
You can tell the hydro lifter engines - they have a gold sticker on the valve cover that says "do not adjust valve lash" or something like that. If you see remnants of a sticker.... that's probably the one.
Other than that - I don't know about carbs - the carbs were specific to the type of vehicle - generally the single barrel carter / weber (peice of crap BTW) came on 2WD's - but not all 2WD's. Some Auto's too I think. Mostly on the 2WD 5 speeds I think.... not all of those either tho - mine had a hitachi....
Posted 04 January 2004 - 01:22 AM
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