lq9 w/ 62cc heads?
07-17-2010, 05:17 AM
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lq9 w/ 62cc heads? Is anyone running a small chamber head on a stock flat top lq9?
I just put a stock lq9 together tonight with a tsp Tv2 cam and I was wondering how much flycut i'd prob have to do to run my spare heads. This is in my street car 2000 SS.
the heads are absolute speed 5.3 2.5s from back in the day, cnc'd. I retired them from my lq9 in my race car and went with 59cc 243 heads I had(the motor has 9.5 diamond stock bore dished pistons) I never had any trouble with PTV clearance but I've got a lot more relief than stock pistons. I prob would have yanked the heads off and tried my AS heads on the street motor but I had 7.4 pushrods and I already know they wouldnt work. Plus i'm guessing going from 72-62cc would be running a tad high on a street car motor.
I know someone is going to say go measure and check PTV clearance, but I was just wondering what chamber head/cam combo guys have on stock lq9s. Plus, I just put the motor in the car and I'd really need some nudging to put these heads on now
I just put a stock lq9 together tonight with a tsp Tv2 cam and I was wondering how much flycut i'd prob have to do to run my spare heads. This is in my street car 2000 SS.
the heads are absolute speed 5.3 2.5s from back in the day, cnc'd. I retired them from my lq9 in my race car and went with 59cc 243 heads I had(the motor has 9.5 diamond stock bore dished pistons) I never had any trouble with PTV clearance but I've got a lot more relief than stock pistons. I prob would have yanked the heads off and tried my AS heads on the street motor but I had 7.4 pushrods and I already know they wouldnt work. Plus i'm guessing going from 72-62cc would be running a tad high on a street car motor.
I know someone is going to say go measure and check PTV clearance, but I was just wondering what chamber head/cam combo guys have on stock lq9s. Plus, I just put the motor in the car and I'd really need some nudging to put these heads on now
07-21-2010, 05:33 PM
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I hear that.
Its been years since I bought these, so much that I forgot they are 66cc 9.4:1 pistons.
-13.7
Worked great on that motor but i'm thinking the valves will hit a stock piston with no relief
