i've heard of someone porting the throttle body and the intake to match. Is this possible? Also can the inside of the intake be honed to give even better air flow? I'm making this purchase soon and I want to be infromed on why/if this peice is better then the ZO6 intake.

 

Yes, the intake can be ported. It's a two-piece design, so the bottom of it comes off to allow access to the runners. I would recommend giving Holley a call before you order one, though. I have a friend that has been trying to get his Holley intake to seal up 7 different times now with no success. When he called Holley to complain, they mentioned that they had left out some information in the instructions. :rolleyes: SO, be sure to call them before attempting the install so you'll be able to do it right the first time.

 

I didn't think the Holly intakes had shipped yet. Does anyone else have one?

Dennis :seeya

 

SlammendVette has one, took him 4 months I think to receive it from JEGS.

 

there are a few out there, I haven't heard of anybody actually installing one yet :confused:

 

thekev 2000- your engine is sweet looking! Sorry to be off topic. :D

 

waiting for mine :rolleyes:
Holley in their infinate wisdom forgot about the valley bolts will not work with this intake . You need countersunk ones or get low profile bolts. I read from some guy that it will be .125" off with stock bolts.....
I have not heard good things about this manifold yet though either... hmmm arggg ...good luck getting into the top of the runner to port it effectively... I called about extrude honing it and that is $600....
:mad

Oh well...
you can port match it and open up the tb area quite easily though.... whoppie doopie doooo...

 

Only my 2 cents worth....
A couple of major corvette tuners have dynoed the Holley and the Z06/LS6 intake already. NO gains were reported. NONE, 0. Another thing to consider, the Holley is aluminum and is heavier than the LS6 manifold. The Holley will heat soak where as the LS6 manifold will not....
we chose not to carry and sell the manifold for those reasons...

Nate

 

I fully agree with Nate. I have been flamed on this intake before, when it was just rumored, but this intake is going to be a pure waste of money for the 99.9% of people who buy it. It can be ported, so it may be of advantage to a dedicated strip only type set up, but how many will you have to buy before you get the correct porting done??? Heat soak on your typical street car will kill all advantages this intake could offer(and as Nate posted, there are none), so in reality, your street car is going to loose horsepower once this intake reaches typical operating temps.

I also know that ARE, MTI and MMS have all tried to port stock LS1 and LS6 intakes and at least one of them even tried experimental ones made of composite material. No gains and usually a drop in bottom end power.

Todd

 

The only time I'd give the Holley intake a try would be if I was running added cubes. I'm running a cam now, and I will step up with a set of heads later on this year. When I do, I'll stick with my stock LS6 intake. As Nate mentioned, this intake is heavier. It weighs in right at 22#! I would guess that the stock composite one tips the scales around 5# or so. I know that GTP in Houston is doing a lot of porting on these intakes for customers; I guess we'll see just how well they're doing. Unless there's a significant gain (20+ RWHP) from it, then it'll hurt you on the street.
Nate - How's life treating you in Arizona? I hear that you're doing well out there. I was in Lubbock this past weekend to whip up on a certain yellow 5.0L with N2O. :cheers:

 

I'll let you know how it works in a few weeks.Mines getting fully ported(not just port matched).I have a stock LS1 and LS6 intake I will try and see what the gains are.

 

On the same subject those wanting to run very high boost may want to consider the Holley intake as well because of the strength.

 

"Doesn't clear the stock valley bolts...." Big deal. Countersink the cover & replace the bolts. Beyond your ability?
"Good luck porting......". This manifold comes apart. Most cast mflds don't. Does that mean that most race mflds
are junk because you'd need even more luck to port them?
"Heat sink....lose power....heat sink.....more loss than gain.....heat sink.....heat sink". Anyone here have an idea
how many BTUs are transmitted to the intake charge or, better yet, what the resultant decreased charge density is?
Raise your hand if you know any more about heat sink than "plastic is better than metal".

For those of you reading these posts because you're considering aftermarket parts for your car, do yourself a favor.
When you see someone beating up a part, qualify the answer. What's it based on? another tip is to look at some
old posts from the flamers. Is that their main theme? Another good clue is: Were they asking "Mechanics 101" questions two months ago, now they know everything there is to know? If that's the case, you can assume they're just repeating what they've read.

BTW My .02 on this manifold. You can port it. Period. You can't port a stock manifold. Period. Ask ANY race engine builder if he'd buy a manifold that can't be ported. The benefits far outweigh the liabilities.

 

Is is a big deal about those valley bolts, because Holley never told anybody about that. They forgot to include that in the directions. Not beyond anyone's ability if they KNOW about it BEFOREHAND.

THe manifold has a plate at the bottom that comes off, but is rather small. You can get to the insides, except it seems it would be a lil tough to reach the top curve of the runners. I am not certain though because I have only seen somebody else's as mine is still "somehwere" :rolleyes:

Hopefully you won't have to extrude hone (to get the top of the runners) and port this intake. Extruding it is overpriced.

I have heard (from a somebody who worked at lpe)that this intake was ported by LPE and performed OK on the first few pulls on the dyno and then fell flat on its face after that because it heat sokaed. It seemed that a ported heat soaked intake did no better than a ls6. We shall see soon I guess when more people dyno them.

So if this intake heat soaks bad then I think I will have the bottom thermal coated and then I guess I am back to using ice :D . I first thought that this intake would not heat soak as much because the lifter valley is covered, unlike the old sbc. I thought since oil was not "splashing" on the underside of the intake it could be kept a lil cooler. Hmmmmm maybe I should get the valley cover thermal coated also... I bet that would make this thing work after porting. THis intake is better than the plastic one becaues you can port it, I agree. I am just a lil dissappointed becuase it seems to heat soak more than I though it would. However thermal coating some of the parts should bring out all the gains I had orignally expected from a nice pig port of this intake.
:cheers: