I am deciding on which one to do. If i stick with the ls head I will build it ,but I can also get a dohc vtec b16 head also which will not be built. I know the favorite will be the b16 head. I am going to have a built bottom end ,once the block comes back.

If i was to go with the b16 head. I get a p28 ecu if im right. Can I keep the stock ls wire harness without adding the pins for vtec? I have hondata w/ a chipped ls ecu. If I am correct can you use the hondata as a vtec deal with the p28 ecu without adding the pins to the ls harness.

Last question, do I need a block gridle?

 

no help

 

wondering same thing.. i have my race ported LS head with Jg springs and crower retainers... But will a b16 head stock be better?

 

I am still trying to figure it out. I think I will go with vtec head though. From what I seen last night. CrV vtec turbo against a 9 second stang on a roll. Wasnt that bad of a race , but i think the stang is 9 second on the bottle. He did not spray though either. This was a stock crv/vtec turbo in a ek.

 

My 2 cents,

The difference will be in the cams. You can port the hell out of the b18a/b but if you keep the stock LS cams the head will still peak at the stock 6200rpm point. The b16 peaks at 7500rpm. So if you want the porting to really help you then get cams to match to match your port work say around 7000 rpms on stock valvlesprings and retainers.

Before I supercharged, I went with port and polished head, JG cams, cam gears and 10.5 compression domed pistons and with dyno tuning I put down 138hp (at 6800rpm) and 126tq. That is a 20hp increase over stock, and 3 more hp than a stock b16a/b (700rpm lower than b16). The torque difference was 11 more ft lbs than stock and 26 more than a stock b16a/b. This setting was only good for stock-like GSR quarter mile times of 15.5@91mph.

My brother has a GSR. He had a best of 15.2 with just intake, headers and drag radials. When he blew his block on nitrous he went to a LS block to save money. With nothing more than the block installed he dropped his quartermile times to a 14.9!!! The midrange power difference was night and day, it felt 20% bigger, but the top end seemed the same by the "seat of the pants feel".

If you do a cost comparison, it is in favor of the b16 head. If you do a quartermile difference (LS street and strip) it's in favor of the b16. Now if you are going race-ready, then stay LS but go with 12:1 "roller-wave" pistons bored out to 81.5-82mm (1.9 liter engine), crane cams big 274 degree cams (7300rpm peak), crane's titanium valve springs and retainers and get it hondata tuned all the way to 8000rpm. You would make in the neighborhood of 160hp and 133tq at the wheels which would be 188 crank hp and 145 crank torque. That would be close to H22 like torque and HP and put you in the neighborhood of 14.5@93mph with drag radials.

That's my 2 cents...