7a or 4a? Higher torque or responsive low end power? Cant have both. Its either one. So i decided to go with the 4a 1.6L setup for this round. Basically the setup would be like this ;
- CNC ported blacktop head
- Toda valve springs
- Titanium retainers
- Toda 288 cams
- 1.6L block
- 82mm CP Pistons
- H beam rods
- ARP studs all round
Still considering to change the transmission to 6 speed. Either i sacrifice short ratio 5-speed with 4.3FD with stock 6-speed with 4.5FD. My competitor has already bought a 5.1FD from me for his 6-speed transmission. That would be sick.
Also im considering OEM camshafts over Toda. Either i go with VVT for low end response or not. The track is small with mostly in 2nd gear and the last lap on high 3rd. The Toda cam is good but power comes late because there is no VVT support. I will reconsider again.
I have a brand new crankshaft lying around and it weighed at 11.57 kg. Im sending it to the machine shop and make knife edge style and balance it with the aftermarket flywheel. Lets see the new weight after the crankshaft is back.
Comparing the new crankshaft with factory. 11.57 vs 12.63 kg. Its gonna be one happy revving engine.
Sending off the pistons to check for any damages because they are bought used. Its better to be sure before installing
Oil clearance specs for main and rod bearings. Also piston ring gap measurements.
The crankshaft finally arrived and looking good too. I have not checked the new weight but it sure feels lighter than before. This would definitely give better response to the engine.
Almost zero friction! Look at that.
Im quite happy with the outcome of the parts from the machine shop. Now im still waiting for a few more parts and we can start building.
Will be using 0.6mm metal head gasket to give the engine a little more compression for better horsepower and torque. My targeted horsepower is 180 and torque at 180nm. Lets see if that can be achieved by gasoline tuning.
I was thinking of switching the conventional power steering pump to the electric type. The reason is to release load from the engine by removing the belt thus gaining a liitle more horsepower. But this EPS is very heavy, at 5kg. So, sacrificing power for more weight? I was then advised by a friend that i can modify my steering rack to NOT use any pump while having power steering. Get it? We will come to that by then. Very interesting indeed. Thanks Mathan.
I will stop this chapter here. Will start a new chapter when I start building the engne. Just need to really focus on it.
Corolla FX GT Journey 