I'm trying to start my rebuild. I need oversized pistons that will land me in the 12:1 to 12:5 compression range. What are my options. This will be with an LS crank and GSR head, head is not milled.

 

ctr pistons and mill the head

 

CTR's would put me over 12:5 expecially with head milled.

 

just ctr pistons. dont mill the head. c speed says it'll be about 12.6 to 1. right about where u want it. but thats with the stock bore. i dont think honda makes anything bigger than .25 over. but with the .25 over it yields about 12.7:!. if your going bigger than that than i would go aftermarket.

 

You'll be fine.
My bro has the same setup in a lsvtec.
No tune it spanks the crap out of a similar integra with a JDM Type R swap
This is on 93 octane

 

I do not want to use CTR pistons. What other choices do I have?

 

slap some jdm P30's on some LS rods... should give you 11.8:1 with the GSR head.

heres a nice link to try out different setups and see what C/R you get: http://www.c-speedracing.com/h...c.php

 

I say go w/ wiseco's, they are by far the best aftermarket pistons imo, check out the import builders comparison here:
http://www.importbuilders.com/pistoncomparo.html

 

I think the next pistions in line behind the CTRs in terms of compression are JDM B16 P30 pistons. I don't think they will get you in your target range though. You can check C-Speed or some other online spec sites to see aprox compression.

 

if anyone is curious where the speed compression calculator is, its here:
http://www.c-speedracing.com/h...c.php