silverado.408 Posted March 14, 2013 Report Share Posted March 14, 2013 So I have a cam and heads from a ls1 had no issues but I have been reading that lq9/4 are picky. So Im curious what is the biggest cam ppl put in there 6.0 without valve cutting. Please also put what heads you have and anything speacial ie gaskets or shorter pushrods. Thanks Quote Link to comment Share on other sites More sharing options...
kcsilveradoss Posted March 14, 2013 Report Share Posted March 14, 2013 Big cam /= big power. Post your goals and budget so people can give you a better idea. Quote Link to comment Share on other sites More sharing options...
JC03SS Posted March 14, 2013 Report Share Posted March 14, 2013 Yeah what do you have done is it a 408 or stock? Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted March 14, 2013 Report Share Posted March 14, 2013 65cc heads, I think 2.055 intake valve but I'd have to check for sure. .041 head gaskets. 235-240 .650-.610 111 cam. About .080 PTV clearance by measuring clay imprint. However I don't feel big cams in heavy trucks are a great idea unless your in it just for the track time. I'm running a 4500 converter right now just to get this truck close to its power band. And I'm short shifting it at 7200 because I'm not sure it can spin much faster and do it over and over again. Peak power was made right at 7200. Peak torque with a cam like this is a joke, makes only 409 at like 5200 or something Sent from my SAMSUNG-SGH-I747 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
JC03SS Posted March 14, 2013 Report Share Posted March 14, 2013 Thanks Brad for the info I always kinda wanted to know myself. Quote Link to comment Share on other sites More sharing options...
2bfast Posted March 14, 2013 Report Share Posted March 14, 2013 I dont understand why people think the bigger the cam the better it is Quote Link to comment Share on other sites More sharing options...
chpspecial Posted March 14, 2013 Report Share Posted March 14, 2013 I dont understand why people think the bigger the cam the better it is I'm with Brian, I know a guy who keeps on up'ing cam sizes and everytime he gets slower at the track. Sent from my ADR6400L using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Blazerdave2000 Posted March 14, 2013 Report Share Posted March 14, 2013 I dont understand why people think the bigger the cam the better it is I agree. Everything has to match. You have to think of future plans. Decide what you want to do with the rest of the motor a s go from there. Quote Link to comment Share on other sites More sharing options...
KrausMotorSports Posted March 14, 2013 Report Share Posted March 14, 2013 I agree. Everything has to match. You have to think of future plans. Decide what you want to do with the rest of the motor a s go from there. x2! Quote Link to comment Share on other sites More sharing options...
Muggs Posted March 14, 2013 Report Share Posted March 14, 2013 I dont understand why people think the bigger the cam the better it isi also agree Quote Link to comment Share on other sites More sharing options...
Cramer Posted March 15, 2013 Report Share Posted March 15, 2013 X100. As you can tell Brad has a lot of work done on his and spins his out like a vette does. That usually isn't what our trucks are needing unless your running at the track most if not all the time. Lower duration and a lift to match the flow of your heads and intake and exhaust with a lsa to get you in the power band you are looking at being in is how you would determine the selection. Donkey dick cams are for the track and bragging rights! Sent from my Motorola RAZR MAXX using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
GI.SS Posted March 15, 2013 Report Share Posted March 15, 2013 good matched setups of smaller cams are just more effecient and turn very quick times. Quote Link to comment Share on other sites More sharing options...
onebadmax Posted March 15, 2013 Report Share Posted March 15, 2013 (edited) What's the max lift you can run without PTV clearence problems on a 224/230 cam? Edit: changed "with" to "without" Edited March 15, 2013 by onebadmax (see edit history) Quote Link to comment Share on other sites More sharing options...
Cramer Posted March 15, 2013 Report Share Posted March 15, 2013 Lift has very little effect on PTV clearance. Duration is what causes problems with it. You can run say a 210/212 .700/.700 can with no PTV issues but have problems with a 235/250 .500/.500. Lobe separation also has an effect on PTV clearance. Sent from my Motorola RAZR MAXX using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
onebadmax Posted March 15, 2013 Report Share Posted March 15, 2013 That's why I included the duration, I'm just wondering if a stock LQ9 will have issues with the LEP Maggie cam? Or should I look to a different cam? Quote Link to comment Share on other sites More sharing options...
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