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WTA 7AGE pro n cons
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<blockquote data-quote="1JZtezza" data-source="post: 3426270" data-attributes="member: 66560"><p>1.8l 4age is not new.Some time ago there was available TRD crank for 1.8l,this was used in early 1990 toyota levine rally car.What u want is only the 7af/ag crank only;safer to go for 4ag con rods especially the 4th gen 16v model.You may need to grind/chamfer con rods and block for clearance.</p><p>Apparently difference in stroke is entirely due to crank.(sorry cant remember) If so use the 4age block which is stronger (check out bill sherwood's 4age page)Before putting everything together check valve clearance first;else all the effort would be wasted by just cranking the car.</p><p>Check all the tolerances first then order TRD bearings,pistons,valve springs,(got balls try 304/304 cams)Forget trd valves because my experience is machine/engineering shops dont work to very fine tolerances and u find the valves sitting at different heights on the cylinder head.Need to change the shim buckets to trd where the shim sits underneath.This is the most time consuming part of this build, getting the shimming right.</p><p>ECU -cant help here;ran a trd distributor with twin weber 45 DCOE.</p><p>GOOD FOR 11,000 rpm-it has been done!!!</p><p>You are a BRAVE man to try this for a 20v head-no experience here but would like to know your result-good luck!</p></blockquote><p></p>
[QUOTE="1JZtezza, post: 3426270, member: 66560"] 1.8l 4age is not new.Some time ago there was available TRD crank for 1.8l,this was used in early 1990 toyota levine rally car.What u want is only the 7af/ag crank only;safer to go for 4ag con rods especially the 4th gen 16v model.You may need to grind/chamfer con rods and block for clearance. Apparently difference in stroke is entirely due to crank.(sorry cant remember) If so use the 4age block which is stronger (check out bill sherwood's 4age page)Before putting everything together check valve clearance first;else all the effort would be wasted by just cranking the car. Check all the tolerances first then order TRD bearings,pistons,valve springs,(got balls try 304/304 cams)Forget trd valves because my experience is machine/engineering shops dont work to very fine tolerances and u find the valves sitting at different heights on the cylinder head.Need to change the shim buckets to trd where the shim sits underneath.This is the most time consuming part of this build, getting the shimming right. ECU -cant help here;ran a trd distributor with twin weber 45 DCOE. GOOD FOR 11,000 rpm-it has been done!!! You are a BRAVE man to try this for a 20v head-no experience here but would like to know your result-good luck! [/QUOTE]
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