How's it going guys seeing if y'all can help me out on a approximate hp for my 370. And What amount of hp it can reliability hold. Build spec is a lq4 block, k1 forged crank 3.622 stock stroke, k1 forged rods, wiseco -11cc 4.030 forged pistons, Arp main studs, Arp head studs, BTR stage 2 turbo cam, billet timing gear, PRC 228cc heads 68cc. Ls7 lifters, melling hpop, holley hi ram, 92mm throttle body, FIC 1000cc injectors. 7.425 pushrods, btr rockers with trunion kit, Btr .660 dual springs upgraded tool steel wrist pins

 

700-800 whp all day long with a good turbo. Most likely a bunch more

 

That about what I was thinking also. Maybe 400 crank n/a.

 

depends how good the machine work is, and if it was assembled correctly, and how good the tune is....
If all that is perfect or close to it then the head gaskets will let go around 1400-1500 Rwhp.

 

Way over 400 horses even in naturally aspirated form

 

I think that'll do 1000whp.

 

Thanks guys hopefully itll be running soon so we can find out. I was hoping for 500 na so it would make atleast 400whp or more untill I get the turbo kit built.

 

Just for reference a set of long tube headers make over 460 horse at the crank with ease on a LS3 (376ci).