trying to figure out the stock compression on my 08 5.3 with 243 heads? im thinking of trying the texas speed 2.5 5.3 liter heads. what do uall think?

 

what do you want to achieve?

 

243's have ~64cc combustion chambers.

 

well these heads have 59cc. my goal is to make 25-30 rwhp plus some decent tq? my 08 5.3 has 220 cam with full bolt ons. does this sound reasonable gain with these heads?

 

also amadeospike loved ur 5.3 setup was awesome. any tips plus opinions would help thanks

 

come on guys

 

What has 59cc? the TSP's? That would increase yor CR adding some low end torque

 

the heads i have 2 install r 59cc with the 202 valves. i wonder what the stock 243 valve size is?

 

For some reason the NBS are very sensitive to knock retard and it is hard to get full potential i don't know if it is false knock or what. I would stick to 243s and with mild mill maybe .010 to .020. This will be easier to tune and I think the 243 are better heads.

 

if i mill the 243s say 20 thousands, what power should i see , cause like i mentioned on a earlier post im trying to pick up 25-30 hp plus from the comp. some good tq. so amadeo what do u think? i know uve had some success with the 5.3 thats why i ask u on it let me . thanks u all