My d16z6 has a redline at 7200, stock. The d15 in the DX/LX Civics from 92-95 has a reline at about 6200-6500 (can't recall exactly)...I've been wondering for a long time, is this because of the limitations of the valvetrain or is it because of the metallurgical content of the rotating assembly, because the stroke is SHORTER on the car with the lower redline...

I'm doing a mini-me with a built head and want to know how high I can rev a stock d15 bottom end, really...

 

I say rev it to 12000 grand and see what happens
~hey at least your post is back at the top

 

thanks...I'm thinkin with a vtec head with higher revvin springs I should be able to pull atleast 7500, probably 8k...anyone?

 

Drugs are bad. Its still a sohc. I rev mine to about 7000 at the most. If you compare Rod Ratio's, the 1.6 sohc is 1.52 and yours is 1.59, so technically you should be able to go higher. But the cam is what determines how much air you move and whether or not 8000 is really necessary, which its not.

 

ah, but if you have a ported vtec head with a more aggressive cam, revving past 7k could be quite beneficial. I'm just wondering what the limiting factor is there...

 

The variance in redline is more likely do to where the car can actually make power. The dx parts can survive reving to 7000 but it wont make dick for power up there, so why bother shifting that high.