will the valves hit the pistons? will the compression be ridiculous? will it get me by till i can get some better heads?

 

The lift doesn't determine the piston to valve problems the duration and LSA does.

Your reducing the chamber volume roughly 8-10cc with that swap, considering that the stock LQ4 is 9.5:1 (I think) you will roughly bump the compression 1 point.

Either way sounds like a mix match of parts here, maybe you should do a little more reading on the subject before you throw parts together.

 

i put some patriot stage 2 heads on my lq9 i am not gonna type this whole thread out but it will give ya some rough guesses from members that guessed mhy cr..

http://www.ls1truck.com/forums/mecha...tml#post115504

also has some vid clips of the idle and few revs

 

try this for compression. and dcr if you have a comp cam in there. http://www.alantripp.com/VE%20calcul...okup%20LS1.xls when it opens click file and open for editing. i get about 11.15:1

what are the specs on the cam? if its a short duration cam it shouldn't have any problem.

 

the cam i am using is a 224/224/563/563/112 if not mistaken. i foregot to mention these heads are the 706 5.3 casting from patriot.. this is a fully bolted motor with the vic jr intake and tpc 90mm throttlebody, the combo seems to work very well just need a few more things done and i will soon get times ..this is also in a 99 ecsb

 

oh, i was trying to find out imd's cam specs. 224 is a good popular cam though.

 

wow. you have no idea what you're talking about. maybe you should do a little reading on how cams work, before you give someone else advice.

i asked the question because i thought someone may have put these heads on a 6.0 before, and i wanted to make sure there werent going to be any problems.

thanks for the other answers though.

 

TTT Im also wanting to know if this setup will work!

 

OMG thanks for the response.....

Last time my BF was in the garage playing with his motor I asked him why the race motor and the new cam with .850" lift didn't need the pistons notched.... then he showed me the piston is about 3" down the bore when the valve is at max lift and explained to me why pistons and valves hit.

Dam it sucks to be a girl and not have anyone believe you, guess I just have a REALLY smart BF.

Jes

Edit: He just told me to give ya a link to this...

http://auto.howstuffworks.com/camshaft.htm

Look at the little movie and notice where the piston is relative to where the valve is and how far it's open.

 

sorry cupcake, but your animated model has no compression on cylinders 2 and 3.

looks like you and your BF are perfect for eachother.