I have been out of the car scene (not by choice) for a few years, but have recently gotten back in it after I purchased an EM1 civic from a friend of mine. I swapped a B20 into it, as I bought the car with a blown motor. The compression is a little higher than stock, at 9.2:1. Still using the B16 trans, I am just wondering what is safe to rev to without risking a blowing up this new motor? I know the powerband is pretty useless above 6k but that is irrelevant to my question.

Thanks!

 

i rev my stock block b20z to 8k. b20vtec turbo setup.

 

I turn my stock ls block to 7800. Put the vtec head on tho.lol

 

stock b20 in the crv has a pretty low rev limit. Although with a good tune you should be safe up to 7300 rpms. same as an LS engine. After that you risk stretching the rod bolts. plus I guess you get valve float around then anyways. I have had my b20 revlimit at 7300 for about 4 years now. all good so far. Boosted about 240hp for 1 year too.

some people go over 7300 with vtec setups with no problems. but 7300 is a good safe number with no worries

 

cool thanks everyone. no vtec for me yet, but hoping to this summer.

 

if you have the motor out, pick up some arp rod bolts for SOME security. my buddy put a set in his b20b and revs 8.5k when hes on the streets. 2 years later still running the same block but now with VTEC.

 

Even though I got arp rod bolts on my ls rods I only rev to 8k. Still skeptic bout goin any higher on ls rods with arp bolts. Still fast as sh*t to me lol