Engine Dyno Testing LS3 Intakes INSIDE!! LS3 vs Ported vs FAST

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Sep 30, 2009 | 10:12 AM

#21

Ragtop 99

Safety Car

Joined: Nov 2007

Posts: 4,537

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From: Bethesda MD

Quote:

Originally Posted by Buddy A

Really strange that a ported FAST lost power since this was not a bone stock LS3. At least cam and headers.

The FAST is not ported. The 3 lines are stock, ported stock, and FAST.

Sep 30, 2009 | 11:46 AM

#22

SweetS10v8

Instructor

Joined: Dec 2007

Posts: 115

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Quote:

Originally Posted by Buddy A

Really strange that a ported FAST lost power since this was not a bone stock LS3. At least cam and headers.

Quote:

Originally Posted by Ragtop 99

The FAST is not ported. The 3 lines are stock, ported stock, and FAST.

Theres still some confusion. I did a quick re-edit, and it should clear it up.

Sep 30, 2009 | 12:07 PM

#23

SweetS10v8

Instructor

Joined: Dec 2007

Posts: 115

Likes: 0

Quote:

Originally Posted by Jason 98 TA

We tried a ported one Fasterproms did for us & it made less power than the stock one. They'll do some testing & we'll try again down the road.

Ive never been a fan of ported intakes, no two are alike and contrary to popular belief a "ported intake" isnt always a "better intake".

Although people enjoy being able to say "I have a ported xxx intake" while bench racing (or posting on forums). It just like cylinder heads, you can really hurt power or even screw things up.

Does the LSXR have the same bump in the end of the runner that the LSX had? I think thats where the added power cam from on ports FAST 92mm intakes, and thats why eveyone seemed to pick up a little power. I thought about doing it on mine, but decided to leave well enough alone.

Last edited by SweetS10v8; Sep 30, 2009 at 12:12 PM.