I have an OBD-1 B16A SiR2 in my EF.

I am taking a 700 mile trip on next friday and was wondering, is it gonna hurt the car to be at 4500rpms for such and extended period of time?

Also, do you think it is necessary to run 93 octane gas? I have been, but its a long trip and money is tight? Will I be down on power with 87?

 

should be fine as long as you dont run it hard. i would just run 91 and you should be fine. and make sure your oil's good.

 

You should try and avoid it using such a low grade fuel. Just put in the higher grade and drive like a grandma if money is tight. Most small engines run at fairly high RPM from factory, so i doubt they would let such products out there if they couldn't reliably keep that RPM for extended periods of time.

 

i drove cross country with my b16 swap. No issues.