i dont know if this is realy the best place to ask this but here i go. my car is going on the dyno in a week and i dont know how much hp i should shoot for. i know my engine will hold 400whp but i would like to shoot for close to 500whp if t can but im afraid i might crack my rear iron or somthing. basically my engine is a large street ported 13b with s5 t2 irons that im prity sure are the earlier irons that like to crack around the oil filter. its got goopy heavy duty tention bolts but idk how much those help. im going to be running a bws366 on E85 of course.

 

Any thing around 400+ hp there is good chance of splitting your rear iron

 

is it makeing over 400whp or just detenation over 400whp that couses problems?

 

i have the same concerns... s4 irons non studded but running e85 and very high end supporting mods (id injectors, aem smartcoils, ffe trigger, very low backpreassure turbo/mani/exhaust and fd intake)
is it detonation that would crack the iron or the hp or ft/lbs?

since a low comp e85 engine with good support mods and a good tune shouldnt detonate on 15-18psi?