i have a lq4 that is fixing to be getting a bigger cam and some head work done. first of all, how would this cam{238/242 605/610 114+4} work with my mods and second, id i wanted to shave my heads (317's) to get around 11.1 compression, how much would i have to mill them and with the cam listed above i wouldnt have to flycut my pistons would i??
jonathon

 

ttt anyone??

 

.030 mill is about what most people do with no problems. Don't quote me but I believe on an lq4 it will bring you to 10.1 compression. Use the search, I know there is lots of info on milling 317 heads.

 

with that big of a cam you would most likely have to flycutt if you milled the heads any. Only way to know for sure is to check though.

 

no you wont..... i installed a Trex in a 03 LQ9 with a set of 243 heads. used stock MLS gaskets. Trex is larger then his cam on a 110 lsa. i had no issues with PTV clearance. this motor was also 11.1 cr

 

Really? my cam is smaller than both of yours and I couldnt mill my 243 heads any on my lq4 with my 228/236 112 cam and a .045 gasket. What were the clearances when you checked with the trex, and how much did your pistons come out of the hole?

 

i didnt measure, i slid it in spun it over. no issues fired it up and no issues. car since hten has close to 1k in miles and no issues

my 232/234 595/598 112 didnt have issues either in that same motor

 

if i was to put a set of 241's on my lq4, what would the comp. be? the reason i ask is because i have a set laying around

 

just because you spin it over and it clears initially doesnt mean you have the correct p/v clearance. let the lifters pump up one time and bang...piston just hit the valve. thats not a great way to find out you didnt have enough.

 

i know but it has been done before and we had no issues. is it tight? probably knowing thta a Trex is meant for stock motor with stock heads. a ls1 has flat tops and with ls6 heads still with in the stock specs that thunder goes by. its just on a larger cubed motor. i took the chance and it cleard and runs strong