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Ls1 and 243 heads, but what else??

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Old Nov 18, 2016 | 08:11 AM
  #21  
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KCS
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Originally Posted by Chevelle_LS
Thanks for all the great respons guys!

To answer the question about the switch to Fitech the simple answer is that I have been looking att many other different intakes and I think the price is fair. After looking at several different intakes and what they cost I think this is a good setup.

I now have the original GM harnest that came with the engine and to tune that you have to buy HP tuners or some other tuner progam for like 500+ just for the program and that is not okej in my opinion.

So I think you get a lot of bang for you buck.
If your main attraction to the FITech system is the self learn ECU, I'm sure it can be adapted to a better intake manifold. The FITech manifold is not designed for the goals you have in mind. The short runners will hurt power and torque in the RPM range you want to be in. You will be much happier with a stock LS2 or LS6 manifold which have the longer runners and they don't cost very much either.
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Old Nov 18, 2016 | 10:56 AM
  #22  
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Originally Posted by KCS
If your main attraction to the FITech system is the self learn ECU, I'm sure it can be adapted to a better intake manifold. The FITech manifold is not designed for the goals you have in mind. The short runners will hurt power and torque in the RPM range you want to be in. You will be much happier with a stock LS2 or LS6 manifold which have the longer runners and they don't cost very much either.
So when the rest of the automotive world was just HAMMERING the General for bringing a two valve push rod dinosaur to the table after a "clean sheet" redesign of the small block; The Sperry brothers designed the first "heads/intake" manifold combo. Their main focus was to make more average torque over a four thousand RPM band. Cross sectional area starts larger and progressively gets smaller as it approaches the valve in order to keep velocity high and promote efficient tumble and turbulence. More atomized mixture, less ignition lead, less emissions, more power. Those dudes absolutely nailed it.
There's really no reason to stray from this long runner design unless high RPM power is the only purpose
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Old Dec 14, 2016 | 02:25 AM
  #23  
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Hello!

So the engine is at the machine shop now and in the mean time I have ben looking at intake manifolds, and the only thing that I am certain of is that I don't want a Fast intake, they cost way too much.

That said, I am having trouble finding intakes that have long runners, or am I just googleing it wrong? I want to keep it under the hood as well so no Holley hi-ram either.

Found this Dorman intake that got me a little interested, and it seems to have "long runners" correct me if i'm wrong but I think it's the truck or Trailblazer intake.



Anybody tried it?
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Old Dec 14, 2016 | 07:45 AM
  #24  
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That intake has been popping up a lot lately.
Zero solid data, other than it doesn't work well with boost.

I'm also not sure how long the runners are compared to a stock truck intake. It seems to have put the plenum underneath the runners instead of on top. The actual runner length might not be much different, but until someone checks, we won't know for sure.
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