Hey guys, I forgot to ask, the motor that I just built consists of a z6 vtec head on a y8 block, is this going to change compression compared to just a full y8 motor??? Also what kind of sensor problems will this cause (if any). I am going to be running a p28 ecu. Thanks in advance.

 

Im pretty sure it wont change the CR by much. If it were me though, id throw a thicker metal headgasket on there to lower it a bit more (thats if ur goin to boost her)

 

Stock Y8 is 9.6:1. Stock Y8 with a Z6 head will drop to about 9.3:1. Swap out for Z6 pistons and you're down to about 8.65:1.

 

I have Wiseco forged 8:6:1's already installed, was just wondering if it would really be 8:6:1 with the different head/block combo.

 

Closer to 8.5 than 8.6

 

hey im doing a SIMILAR swap im putting a y8 head on a y5 block will my compression change and what would my compression be?...im new to this!

 

you should boost it with that kind of compression

 

He is. I'm helping him put it back together and install the kit as soon as he gets all his s**t back.

 

thats what i was gunna say. its gunna be slow as **** with that compression and no boost.

 

opps lol sorry about that kinda skip most of the forum but thanks for the reminder cough asses cough lol just playing