ok so i would like to build up my b18b1 to 250 hp my question is what all do i need to do it and keep it reliable

 

it depends on how much you wanna spend, a stock motor will hold up just fine or if u wanna a really make it pretty solid put new internals in it

 

ok well like wat cams should i get then and what other internals should i get as well also what turbo do you recomend for the level of hp and what clutch brands would be nice in telling me what to get cause it is going to be a project drawn over time but i want to do it right

 

well starting with the fuel system i would get a walboro 255 fuel pump and a minium of 450cc injectors, for internals i would go with cp pistons 81.5mm bore with 9:1 compression and eagle h beam rods, you can use stock cams they will be fine unless u want it wicked, for the turbo kit i would go to treadstoneperformance.com and order the turbo kit on there its like $2000 for the kit but its a real nice starter kit

 

Your best bet is to search and check out other builds

 

to hit 250 and maintain reliability with the stock compression ratio or would it be more reliable to run a lower compresion ratio

 

you can use the stock comp ratio you just need forged pistons but i would recommend 9:1 to be extra safe and if u wanna go with more power later

 

With good tuning, most D16's last a long time at 250whp. A B18B at 250whp should have little issues, as long as the bearings & rings are good. Oil leakage is what can get detonation occuring, as it tends to create a hot spot where it bypasses the rings.

A really cheap 'buildup' to hold 250whp would be to swap in GSR crank/rods/pistons. Its less than the price of forged rods alone, and have proven to work past 300whp (actually 400+ in many cases). The best part is you'll run lower CR than the GSR (even safer), since your B18B head chaimbers are 6.4cc larger.

BTW 407whp stock LS bottomend: http://forum.ectune.com/viewtopic.php?t=432