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Camaro V6 LFX Engine, Exhaust, and Bolt-Ons For all LFX related parts

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Old 07-21-2013, 11:03 PM   #1
RacnJsn95
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Ported LFX intake manifold. You know you want one...

Ported my first LFX intake manifold today (but not my first time around the block porting), and I am extremely happy with the flow gains... There wasn't a lot to work with being as the LFX manifold is made of a composite material, and doesn't have too many problem areas (that we can see, since it doesn't come apart (yet))...

The bottom of the lower intake portion was gasket matched to the intake gasket, the top of the lower intake portion was matched to the bottom of the intake. I also blended out a decent sized ridge in the bottom of the upper intake manifold...



Not much of a gain was had from the work above, but none the less, a gain is a gain (~2%)

The biggest gain was had with the "reservoir" behind the throttle body was filled and blended into the intake. This is by far the LFX intake manifolds biggest fault, not only is the "reservoir" about 3" deep which most likely causes a swirling effect right behind the throttle body, in which there seems to be a piece built in to redirect air and straighten it back out...

The "reservoir" area was roughed up, filled with a polyurethane plastic, and secured using bolts so it should not come out, as the plastic is formed around the bolt threads. I then went to work smoothing and blending the filled void into the intake runners, and removed half of the "air straightener" piece at the top of the throttle body opening... I could have removed the whole thing, but my thinking is that you can easily loose as much as you just gained by going too far, and after all this work, the end result was about a 9.5% gain in airflow as shown on our in house Super Flow flow bench...





I have dyno time scheduled for Aug 3rd, so this ported intake will be added to the list of things to try along with: The LFX Intake Extendolator (Intake spacer/isloator), The Adaptolator (w/ an LLT intake manifold on the LFX engine), The stock LFX intake with no spacers, and finally the ported LFX intake...
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Old 07-22-2013, 01:26 AM   #2
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Very nice! Any noticable acceleration difference and/or better mpg? Or have you not tested it yet? Waiting for aug 3rd
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Old 07-22-2013, 07:03 AM   #3
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got some ready for August 3rd. Very curious to see how this plays out
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Old 07-22-2013, 08:33 AM   #4
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Yes, that oil sump in all V6 intakes is horrible in the way it causes flow disruption. Filling it and shaping it is the biggest improvement you can make.

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Old 07-22-2013, 09:43 AM   #5
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Interested to see results!!!Something like that mod, i would want drive around town report as well at different speeds...Dyno is important, but so is normal driveablility and to know no negative affects from it being filled. Good job!!
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Old 07-22-2013, 12:29 PM   #6
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Sweetness brotha! Glad to see you jumpin on those!

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Old 07-22-2013, 01:58 PM   #7
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This is very cool! Finally another (hopefully) great mod for you LFX guys.

I wish I had an LFX :(
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Old 07-22-2013, 02:29 PM   #8
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For the reservoir filler how about making a piece that fits into the throttle body opening and when pushed in/down for the final seal would include 4 holes which line up with the throttle body bolt holes?

When installed, from the outside it would look like a throttle body spacer.

This way it would be removable.
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Old 07-22-2013, 02:51 PM   #9
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This is very interesting...subbed!
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Old 07-22-2013, 04:06 PM   #10
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Quote:
Originally Posted by KMPrenger View Post
I wish I had an LFX :(
You could have an LFX manifold on your car


Quote:
Originally Posted by intensifi View Post
For the reservoir filler how about making a piece that fits into the throttle body opening and when pushed in/down for the final seal would include 4 holes which line up with the throttle body bolt holes?

When installed, from the outside it would look like a throttle body spacer.

This way it would be removable.
Seems like a good idea, but it would just cost too much to produce, and odds are you would never want to take it out.
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Old 07-22-2013, 05:04 PM   #11
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Seems like a good idea, but it would just cost too much to produce, and odds are you would never want to take it out.
When selling it seems many people take it back to stock.

The companies that make throttle body spacers might be a good fit for this??? Maybe an RX performance product?

Since your method is "destructive" anyway, how about cutting the reservoir off (or drilling a single hole from the bottom) and sealing from the inside and outside. Make a piece for the inside that conforms to the contour with a bolt hole in the bottom side, then put a bolt up from the now cut away (or drilled) reservoir using a cap? In the drilled case, you could take the pieces out and cap the drilled hole to "go back to stock".

I would think a 3D printer could knock this piece out quickly.
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Old 07-22-2013, 07:36 PM   #12
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Why the heck would you ever want to take that back to stock? It's invisible unless disassembled, improves performance and does nothing "voidable," since no one would even know it has been done in 99/100 times.

I think I am very interested in this and will be looking for your comparison testing. Should work great for a S/C car as well, after all, flow is flow.

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Old 07-22-2013, 07:39 PM   #13
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Why the heck would you ever want to take that back to stock? It's invisible unless disassembled, improves performance and does nothing "voidable," since no one would even know it has been done in 99/100 times.
Agree 100%
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Old 07-26-2013, 10:53 PM   #14
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Quote:
Originally Posted by SoCalThug View Post
Very nice! Any noticable acceleration difference and/or better mpg? Or have you not tested it yet? Waiting for aug 3rd
Quote:
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Interested to see results!!!Something like that mod, i would want drive around town report as well at different speeds...Dyno is important, but so is normal driveablility and to know no negative affects from it being filled. Good job!!
To kind of answer both questions, here is my report after driving around with the ported manifold for the past 5 days...

Upon first installing it, there was a noticeable flat spot about appx. 2800-2900 rpms, and I was immediately disappointed...I also knew immediately where I probably went wrong too... However the port master, and I both decided that I should continue to drive it and let fueling adjust...

It started getting pretty good Tuesday/Wednesday, and today, I think it feels like a rocket ship compared to stock. The flat spot has turn into a "set you back in the seat" spot... At WOT the take off from a dead stop feels slightly better, if at all, but once it hits ~2800k, it's off and pulling hard...

Gas mileage is down... Because I can't keep my foot out of it!!! It's probably going to be a couple weeks before I can report real world gas mileage differences, if there are any.

I was going to go to the drag strip tonight to see if ET/Trap speeds got any better from my previous stock times, but then I realized I had just filled the gas tank and I didn't feel like siphoning the fuel out as it was 103 today. Dyno testing due next Saturday... Perhaps I will hit the track Friday night.
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Old 07-27-2013, 06:06 AM   #15
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Sounds good!! looking forward to your updates...crazy how deep Chevy made that pocket.
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Old 07-27-2013, 09:35 PM   #16
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At the drag strip with the ported LFX intake and a 1/2" manifold spacer (The Extendolator).

New fast time, 14.663 @ 95.54 mph. DA is currently 3480. DA for the previous best run in sig was 2330... I'm thinking a mid 14.5x is in the cards tonight once it cools off.

With 3/4 of a tank of fuel this time too, lugging around an extra 80lbs of fuel :(

*edit* finished off the night with a bestof 14.605 @ 95.15
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Old 07-28-2013, 06:21 PM   #17
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Not bad...more weight...worse DA and you shed off a tenth and a half.

Of course lots of variables, but all things the same that's a good 10 - 15 HP gain generally. Maybe you picked up some low end torque? That would be my guess.
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Old 07-30-2013, 03:29 PM   #18
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I want!
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Old 08-02-2013, 01:03 PM   #19
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Old 08-02-2013, 04:12 PM   #20
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When can I have it?


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Old 08-02-2013, 06:12 PM   #21
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Dyno day tomorrow....can't wait to see the results!!
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Old 08-03-2013, 08:12 PM   #22
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Dyno day tomorrow....can't wait to see the results!!
Did the dyno thing today... It went ok as far as swapping parts and making runs, but the 2LS not wanting to stay in one gear is really making it hard to pick the info apart and show anything useful... I'm going to have to dig deep to see what's what. Dyno didn't show anything useful running locked in 1st with a load. Ended up having to let it shift 1-2-3 in each run, and because of this, and however this particular dyno reads, it says max power is around 16,000 rpms... The rpms are right until it shifts into 2nd...

It's going to take me a while to pick these run files I got apart. IF I can even get anything useful out of them...

This goes for all 3 threads I've got going. (this one, the adaptolator, and the extendolator)

I'm pretty sure all of this testing, on this car, on this dyno, is worthless :(
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Old 08-03-2013, 08:36 PM   #23
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That is a real bummer. :(
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Old 08-03-2013, 08:57 PM   #24
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I was also hitting the speed limiter toward the end of the run in 3rd. It would peder out at about 6400 in 3rd gear when it would hit 118 mph... That doesn't help much either. 2ls is junk, don't bother dynoing one (stock anyway, maybe a tune could fix the manual mode 2ls problem?)
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Old 08-04-2013, 06:23 AM   #25
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I hope so I'm running a 2ls now this is depressing news.


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