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370 lq9 with Ls3 top end

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Old 11-24-2013, 09:54 PM
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Default 370 lq9 with Ls3 top end
I'm doing 370 with Ls3 top end built for nitrous! What kind of power should I make on motor?
I will put a 150 shot on it!
Mods
42# injectors
92mm TB
Ls3 intake
11:1 compression
Full cnc ls3 heads with bigger valves
Custom cam 230/244 .642"/.612" 113+4
3/4 longtubes
Full 3" exhaust
Hooker catback
Stock 4l60E
323 gear
Last edited by Donkey SS; 11-24-2013 at 10:04 PM.
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Old 11-25-2013, 12:58 AM
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I think that Full cnc ls3 heads with bigger valves is a waist on a 370ci engine.
stock ls3 heads are more then fine. If built right it might make around 485whp
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Old 11-26-2013, 08:46 PM
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Originally Posted by one fast zo6
I think that Full cnc ls3 heads with bigger valves is a waist on a 370ci engine.
stock ls3 heads are more then fine. If built right it might make around 485whp
Agreed. The ls3 valves are already almost excessively large.

What are the exact specs on the head?
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Old 11-27-2013, 08:03 AM
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I just looked at specs on the heads! Thought they had bigger valves but they are 2.165/1.59 valves and 68cc heads!
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Old 11-27-2013, 12:02 PM
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Stock valves and chamber. Any work on the ports?
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Old 11-27-2013, 10:46 PM
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Full cnc ported
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Old 12-10-2013, 02:47 PM
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save your money on heads and beef up box as that will lunch first.

also 200+hp spray
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Old 12-19-2013, 12:54 AM
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http://ballisticspeedparts.com/bsp-r...peed-dyno-run/

Did you get these heads?
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Old 12-19-2013, 04:34 PM
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I have a very similar setup with a 230/248 613/617 LSA 114+4 cam

stock heads, stock intake, 90mm TB

Made 453/429 on motor..

Id like to see the dyno sheet on yours after your done.
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