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What kind of power am I looking at LQ4

Old 01-17-2016, 08:57 PM
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Default What kind of power am I looking at LQ4

Hello I'm just looking at some horsepower number you think I can achieve with my setup. Plus looking at some recommendations on long tube headers. I will list my setup below.

The headers I have purchased are LS swap hooker 1 3/4 long tubes. Would I be better off selling them and purchasing 1 7/8, would it make that much of a difference in power?
What are your thoughts on replacing throttle body and injectors? What are the positives and negatives of keeping the stock ones I have with my setup?


Thank you for your time!

6.0 LQ4
LS6 intake
LS6 stock DBW throttle body
LS6 stock rails and injectors
243 heads machined to 60cc
Texas Speed 112 233/239 cam
Comp trunions
PRC .650 dual valve springs
LS2 timing chain
Meiling high pressure oil pump

All hooked up to a T56
Old 01-17-2016, 08:58 PM
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430ish whp give or take, 1 7/8 headers have been proven to make more power over 1 3/4 headers time and time again. A larger displacement motor would like them.

Youre definitely going to need larger injectors, my z06 maxed out the stock ls6 injectors with bolt ons and tune
Old 01-17-2016, 10:37 PM
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Originally Posted by k_garretson23
430ish whp give or take, 1 7/8 headers have been proven to make more power over 1 3/4 headers time and time again. A larger displacement motor would like them.

Youre definitely going to need larger injectors, my z06 maxed out the stock ls6 injectors with bolt ons and tune


Do you suggest keeping the stock TB and upgrading the rails and injectors? If so what can you recommend with stock intake and throttle body?
Old 01-18-2016, 03:27 AM
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The rails are fine but upgrading the injectors is a good idea. If keeping the LS6 intake I'd get the TB ported
Old 01-18-2016, 11:18 AM
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Thank you for the help, can someone recommend injectors for me. I don't have a big budget but if its something I'm lacking then I don't mind dipping into the savings account
Old 01-18-2016, 11:24 AM
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Old 01-26-2016, 03:57 PM
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some ford green tops would probably work well for you
Old 05-02-2017, 05:26 PM
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How much did you make,


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