How much HP gain from .020 mill?
10-05-2010, 09:56 PM
#17
Dunno but I know your truck runs good for what you got. You ran at 4700+ DA and still ran a 13.4. You will be 12's next test and tune. And that is with a bolt on stock LQ4. Thats better then a lot of cam guys I know of.
10-07-2010, 10:25 PM
#18
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No dynos here wbut here is my comparison/experience.
I went from a LQ4 226/226 cam and ran a 12.43@106.9, then swapped motor, next motor was a LQ4 228/232 cam with heads milled .030 and ran a 12.32@108.1 and the truck weighed in 100lbs less, so what made me gain? The bigger cam, the stock milled heads or the 100lbs less? Me personaly i think that milling the heads did NOT help out at all and will never do it again but thats just me.....
I went from a LQ4 226/226 cam and ran a 12.43@106.9, then swapped motor, next motor was a LQ4 228/232 cam with heads milled .030 and ran a 12.32@108.1 and the truck weighed in 100lbs less, so what made me gain? The bigger cam, the stock milled heads or the 100lbs less? Me personaly i think that milling the heads did NOT help out at all and will never do it again but thats just me.....
10-08-2010, 08:26 AM
#19
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Your totally forgetting that compression is so mystical that its properties are still not totally understood by "internet racing" man. Lots of compression gives a motor the "fast and furious" effect. Much like nitrous oxide it makes intake welds blow and blurs all side vision for over 200 yards ahead of the car...
10-08-2010, 09:29 PM
#20
So I guess I am internet racing man. lol Even though I race and go to every race in my town. If compression is a mystical thing why would anyone want more compression. LS2 10.9 LS3 10.8. LS1 10.1 LQ9 10.1. Why didn't Gm just leave them at a streetable 8.5 like the old days. Because bigger cams need more compression. Other wise your engine is a turd til like 6000 rpm without compression. I would love for you MPFD since you know everything to come to Great bend Next Friday night and race Johns Bolt on LQ4 with your headed and cammed lq4, Cause you should whoop him but. I bet you don't. And don't tell me your truck is heavier cause the 99-2003 trucks are quite a bit lighter then the 2004-up. Good Luck.