PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

What type of bellows for SD tune?

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Old Dec 17, 2005 | 10:42 AM
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Default What type of bellows for SD tune?

For those of you who are running SD full time what are you using for a bellow? That is with a std after market type lid.
TIA
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Old Dec 17, 2005 | 11:46 AM
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I just kept the whole intake tract the same as when I ran the MAF - TSP 85mm lid, truck 85mm MAF (descreened), stock accordian bellow, and ported TB into an LS6 intake.
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Old Dec 17, 2005 | 05:39 PM
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I still have granatelli maf in there 75mm but unplugged. Im getting 103kpa which is pretty close to Atmospheric pressure so no real need to remove it unless you want every last bit of power.
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Old Dec 17, 2005 | 05:49 PM
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https://ls1tech.com/forums/generation-iii-external-engine/359184-pics-my-new-slp-smooth-bellows.html
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Old Dec 17, 2005 | 07:00 PM
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Originally Posted by ringram
I still have granatelli maf in there 75mm but unplugged. Im getting 103kpa which is pretty close to Atmospheric pressure so no real need to remove it unless you want every last bit of power.
just because you see 103 kpa doesnt mean its good FWIW. i was able to see 100-101 but a better tune now has to down to 96-97, lower kpa the more vacuum the car sees, which means it fills the cyls better. of couse, if you do see high values it could also be that the intake is large enough and there is no restriction for airflow. just wanted to point out that kpa reading doesnt mean a whole lot. although i used to think the same.

if u arent running a MAF why keep it in there? take it out and put a piece of exhaust pipe in there. i have an 85mm lid from tsp and 3.5" exhaust pipe going to my bellow. i can get pics if you want. i have it painted metallic black. it matches my TB and coil pack holders
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Old Dec 17, 2005 | 08:14 PM
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Thanks TAQuickness for the tactfull redirect to your prior posts. As soon as I went there I remembered reading it back in Aug. I have been in some suspension mods lately and now I am getting ready/ studying up for tuning software and support; I am interested in doing away with the MAF altogther- so keeping on topic of this thread, physically how is your setup holding up-i.e. any leaks, unwanted movement, heat, other surprises or updates to your original design.
Cheers.
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Old Dec 17, 2005 | 08:22 PM
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i know mine has no issues, dont even know its there. its no different from having the maf in there except there is no restriction in there. nice, undisturbed flow
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