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lq9 with prc 237 heads

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Old May 9, 2012 | 08:45 PM
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Default lq9 with prc 237 heads

I have a freshly rebuilt stock 2003 lq9. I'm looking to do a high compression all motor street car. Car will probably see the track twice a year. I was wonder where that would put me around compression wise and if i should get them milled and to what? After my heads are chosen (pretty sure it'll be these but im open to ideas) ill be having a cam specd out by predator. here is a list of what the car has:

102 fast set up, tsp 100mm maf, 104mm lid, full exhaust with bolt ons, and converter.

Not worried too much about hp numbers but would like to see a low 11 high 10 second pass out of it. Thanks a lot
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Old May 9, 2012 | 08:48 PM
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I also do not want to run into ptv clearance problems. I don't want to flycut
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Old May 10, 2012 | 03:08 PM
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Sorry to be slow to respond to your PM. Definitely look at the 227s and the 237s are too big for the stock LQ9. The 227s have a laid over valve angle so you can get away with a pretty sizable cam with out having to flycut.
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Old May 10, 2012 | 07:52 PM
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Ok thanks a lot. I will be contacting you shortly.
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Old May 10, 2012 | 09:59 PM
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Keep us posted - would like to see a H/C LQ9 run 10's but not sure you will get there without loosing a LOT of weight.
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Old May 10, 2012 | 11:22 PM
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Um sorry but I'd go with some tfs 225's if you want to stay cathedral.
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Old May 12, 2012 | 06:56 PM
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Yeah tfs are definitely something I have been considering. Ive just seen so many of these applications I want to do something a little different. Seen a couple of these set ups and they run pretty decent. we shall see I'm still waiting on a few other parts. And litle, u ever go to strats or anywhere like that? I'm from the st Charles area
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Old May 13, 2012 | 08:35 AM
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Lol I will be now that my car is almost done. Go to the Midwest section and you'll see my clown friends calling me out lol
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Old May 17, 2012 | 09:19 AM
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What chamber size do you need? Also do you plan on cutting the pistons? this will better tell us your p/v constraints so we can select the best possible head for getting you compression & flow!!
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Old May 23, 2012 | 01:03 PM
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My old set up went 10.79 at 127 on the motor. Car weighed 3700 with me in it. Ported 5.3 heads, T-rex cam, th400 with a 4000 stall. High 10's can happen on a stock bottom end 6.0. It was a Lq9 and I did flycut .020. 11.2 :1 C.R.
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