I have a b18a1 w/ DC4(jdm) tranny from a 99 GS, at highway speeds 75-80 I'm cruising at 4k RPM. I never used to travel on the highway a lot until recently.

What are you guy's highway cruising speeds / RPM. I will check back on this later have to head to work. Thanks for the input.

 

4k seems a bit high
i have a 4dr eg jdm15b with z6 tranny at 80 id be at like 3500ish
what tranny u using? get an ls tranny ul be at like 3k at 80mph

 

i got a 95gsr wit 2000 b16 tranny lol and i cruise at 3k rpm in 5th gear goin 60mph (terrible)

 

get an LS 5th gear

 

I have a B18a1 with a GSR tranny and Im at about 3900 rpms when going 70 in 5th.

 

doing about 75 with a USDM B16A2, mine spins at about 4200 or so.

 

2002 civic ex 5spd 6750redline

3100rpm at 70

4000rpm at 85

will those hight rpms hurt the motor on long distance trips?

 

At high speeda like 80mph you have plenty air to cool the engine; and at high rpms you have plenty oil pumping so..... It shouldnt be a problem