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Message: <blockquote data-quote="1JZtezza" data-source="post: 3428796" data-attributes="member: 66560">longer stroke does not necessary mean longer con rods.4age-16valve bore 81mm x stroke 77mm7age- bore 81mm x stroke 85.5mmSo 85.5mm minus 77mm divided by 2 gives u the extra radius needed by crank to give you the required 1.8l ie the rotation radius from centre of crank in 4age is 38.5m whereas for the HKS crank is 42.75mm an increase of 4.25mm.If this is the same with 7ag/af then life would really be a whole lot simpler.Like i said earlier it was a HKS crank but you will have to measure the 7age crank yourself to confirm.Would save you guys a whole lotta grief.So take out your calipers and start measuring!THEN you can use back all the 4age stuff---pulleys,cams belts etcBump: uhm silly question here --why cant just bolt 4age 16valve head to 7af block.Difference is the valve angles only.Use back 7af timing belt.Silly me thought 7af single cam but its twin cam right?If that can be done then bolt blacktop head on should be also ok.But run the 4age or blacktop ecu because the 7af was meant more for economy.Anyone tried 3sg or 3sgte in rear wheel drive corolla?????Bump: uhm silly question here --why cant just bolt 4age 16valve head to 7af block.Difference is the valve angles only.Use back 7af timing belt.Silly me thought 7af single cam but its twin cam right?If that can be done then bolt blacktop head on should be also ok.But run the 4age or blacktop ecu because the 7af was meant more for economy.Anyone tried 3sg or 3sgte in rear wheel drive corolla?????</blockquote>

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