theBrit Posted February 22, 2006 Share Posted February 22, 2006 Hi, I have to pull my LT1 out of the Z because of an oil leak. As anyone knows, if the engine has to come out, you may as well do something else while you are in there Can anyone hazzard a guess as to what I might gain by fitting a cc306 cam and 1.6 rockers to an other wise stock LT1 ? I would like a lighter flywheel too, I can afford to lose a little bottom end (where I smoke the tires anyway) for the extra mph I hope to be able to pull in each gear before shifting. Maybe next time I can port the heads a little, but I understand that they flow fairly well stock. Mike Quote Link to comment Share on other sites More sharing options...
LS1 240Z Posted February 22, 2006 Share Posted February 22, 2006 LT1 heads are crap, get the LT4 style heads. you will be glad you did, and then think about a cam.. Quote Link to comment Share on other sites More sharing options...
jbc3 Posted February 22, 2006 Share Posted February 22, 2006 Don't do it unless you port the heads. I have LT1 stock ported heads.... they can be made to flow decently. IMO If you are going to leave the stock heads, unported, put a milder cam in like Comp EE 218/230-114. Jody Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted February 22, 2006 Share Posted February 22, 2006 most of tthe comp cams (306)cams matched to 1.6:1 ratio rockers will be a disaster in an otherwise stock LT1 as the stock springs and valve train geometry won,t handle the lift with safe clearances. Im not sure which cam your looking at as comp cams lists 3 differant sbc (306) cams but in any case the CROWER 00471LM cam (about the absolute largest a basically stock shortblock can handle) and yes you need to get the springs and clearances checked/corrected http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00471&x=24&y=8 WITH THE MATCHING SPRINGS and clearance work NECESSARY and the mandatory drive train mods like rear gear ratio,and higher stall converter has proven to be an exceptionally effective cam in the LT1. I tend to stay away from ANY comp cams, cams as thier tech guys are rude frequently,and have given me bad advice on several occasions,keep in mind that the rest of the combo, stall speed, rear gear ratio,etc. must match the cams designed rpm range for it to work correctly,slapping a cam with a huge increase in durration and lift into an engine with no other mods is a sure path to building a dog! or worse, a combo that has clearance issues,that self destructs Quote Link to comment Share on other sites More sharing options...
80LS1T Posted February 22, 2006 Share Posted February 22, 2006 I had my stock LT1's ported out, they do flow pretty good for a stock casting... Quote Link to comment Share on other sites More sharing options...
theBrit Posted February 23, 2006 Author Share Posted February 23, 2006 Thanks for the input, I guess I won't bother changing anything for now then. I wasn't expecting a huge difference but if it will probably hurt things....well. Quote Link to comment Share on other sites More sharing options...
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