4agze 7afe hybrid Options

[Elevindie]

I have heard rumors of putting a 7afe crank and pistons in the 4agze block...this was my first thought of a place to start my research. All i want to know is if its a possiblility... it would be wonderful to get the 1.8 liters out of a 1.6!

[nik]

IF you want more info on the 5age go to club4ag.com the 7age is there also

The 5A-GE

Once a very popular mechanical tuning approach to the 4A-GE engine, the 5A-GE engines proved that more torque could be had in the otherwise peaky nature of the 4A-GE. It wasn’t without demerits but the 5A-GE did fare reasonably well in the enthusiast market. HKS makes a range of internal components to suit your needs and 5A-GE was one of them. The 11.6 compression kit comprised of longer stroke crank, 81.5mm pistons and various bearings, rings and fastener sets is the most aggressive. They are designed to be built using the 4A-GE and proved to be very high quality in design and materials. However, the 5A-GE isn’t without pitfalls so we’ll discuss a few here in detail.

The first thing we must note in the 5A conversions is the fact that the block needs to be modified somewhat to make room for the longer stroke crankshaft. The 5A-GE kit uses this long crank stroke to make approximately 1700cc displacement but slapping this crankshaft into the 4A block; one will immediately discover that it won’t spin without hitting something. No, it’s not a defective unit… So we modify the block by grinding away the inside of the crank case…. by placing the crank and working away where it hits. The clearance here should be no less then 1mm so you can avoid damage when there’s engine failure elsewhere. Next, attach connecting rods and repeat procedure. One note here…never grind the rod or crank as this will upset the balance and strength of the moving pieces…unless you are doing it for the purpose of getting better balance.