Lq9 with 243 heads
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Teching In
Joined: Dec 2020
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Lq9 with 243 heads I built a lq9 with 243 shaved .030 heads and .010 on the deck and .020 pistons the camshaft is a tsp 228/232-600/600 lift its n/a with a 780 pro system carb holley intake and a msd6014 trying to find the timing curve and how much hp it should have im going to test and tune the car at the track and what spark plugs should i run the car is a 1984 z28 with 4.56 gears and a 350 trans 3500 stall
TECH Enthusiast
Joined: Sep 2019
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That ignition system comes with a manifold pressure sensor, so you can tune it a bit like an EFI system, so looking online for a similar engines timing curve could be a good start. If you have good piston quench height I would be a little surprised if you needed more than 24 degrees of timing at WOT.
TECH Fanatic
Joined: Jan 2018
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From: Dade City, Fl.
Hey Mapplin ! Your engine combo is very similar to mine. I have 3.42's and a 4l60e, Yank PA3400 in a '71 Camaro RS. I haven't got it to the track yet. Keep us posted on how the test and tune goes. I'm very interested! Wow 4.56's 
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Teching In
Joined: Dec 2020
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Lq9 with 243 heads Well just got back from the track and the car did well but for some improvement ran 4 passes .ran a 7.24 at 98 mph 7.36at 97 mph 7.51 at 94 mph and the last run I blow the tires off and almost hit the wall but other than that it did very well my 60 foot was 1.6 to 1.8 I do have 295/55/15 Mt drag radials still wasn’t able to adjust the timing on my msd6014 so I put it on ls1HO didn’t have a hotspot for the laptop 😒
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