Quote:
Originally Posted by RehabJeff86
@ Jason great write up!! Can you elaborate more for peeps who wants to stay NA for the track and wants to rev up to 9-9.5k rpm, how to build the internal towards this?
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Hey Jeff!
Sure thing. Basically for anyone really tracking their car, most engines in stock form are okay over time with proper maintenance. However, adding an intake (or panel filter), full exhaust, tuning, alternate fuel, ignition, etc. are all factors in increasing heat and wear.
The OEM internals have specific metallurgy specs requested by engineers when designing the engine. Considering this car is geared for tracking and having a good time, I'm sure they're pretty good. Then again, a high compression ratio OEM tuned to max potentially can wear on things over time.
In the EvoX world (albeit a factory turbo car), we saw tons of failures on cars with simple bolt-ons because the rods were CRAP! Many bent rods causing catastrophic failures.
I even read of a guy on here that bent a rod on his FA20. For me, even in N/A form, you can go nuts and race while having that extra protection knowing you aren't going to bend a rod or blow up a piston (it's still possible, but definitely far less chance than with OEM).
Also, by adjusting the compression even on a N/A engine, you can play with the timing and move the power band around. So for specific track applications, this could be a major advantage especially if you know your gearing and where you're in the power in and out of turns.
Then sometime down the road, I'm sure we'll eventually see cams and valvetrain goodies allowing the RPM to be raised -- all this will work hand-in-hand.