Colonel

"Does the Holley make any more power than the LS6 style, whether it'd be 1 hp or 10."

Not from what I've read/heard, even when ported. Go figure.

Cody Brooks

iTrader: (2)

i've heard that the holley makes more power when ported to match heads than the ls6. i've heard the arguement go both ways. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Nasty N8

iTrader: (33)

And why deal with heat soak?

OneQuickSS

So with the mods that I have done, what would be the best choice for me. Id rather have the holley because I think if I was to make the bore bigger on the inlet of the intake, then maybe the throttle body would be of some use. Can you even make the bore bigger? Also with the holley intake, I can port it so that it matches. Can you port plastic. I know that the intake has little heat soak, but can you explain how it would hurt. I also like the holley because it matches the motor. Please give me the advantages and disadvantages of the both of them.

Cody Brooks

iTrader: (2)

the idea of heat soak being bad is that many people feel that the heat from the manifold would be transfered to the incoming air. i feel that it wouldn't be too much of a change at full throttle because the air would be coming through so fast that it wouldn't have time to get warm. too bad that you can't get a holley manifold that is made of the same stuff as the ls6. port it after getting it and not have to worry about the heat soat issue.

OneQuickSS

Does the Holley make any more power than the LS6 style, whether it'd be 1 hp or 10. What are the advantages and disadvantages of the both of them. What are the hp gains of the both of them coming from a LS1 intake. What would be the best choice for my mods. Look at my profile below.

Magic Man

I don't know if you are planning on headers but if not LS6 in more than enough.It sounds like you are leaning towards the Holley and if that is what you want go for it.The Holley would be easier to work later on down the road but you will need to get heads,cam,and headers to get to where engine needs more than LS6 can supply.

OneQuickSS

Still not answer all my questions. Read above your reply or if anyone else wants to reply, its the third to the last one, which includes this reply.

OneQuickSS

Actually, Im gonna get FLP's this week. Im not sure if I'll ever do a head and cam package, but then again when I first got the car I said that I wasnt gonna touch it. Do you know the advantages and disadvantages of the both of them. Does the Holley intake make any more power than the LS6. Can you bore the inlet on the Holley intake to match the BBK.

strokedls1

iTrader: (1)

There is no need for a larger throttle body. I don't think that you have seen what the ported heads look like in comparison to the intake ports. The intake ports are much larger, and I doubt that any gains would be seen off and porting. The ls6 is the only way to go unless you are planning a direct port nitrous install. The nylon will not heat sink anywhere near that aluminum intake, and it is lighter and cheaper to boot. I am using the LS6 on a 422 so I doubt you will see any restriction on a 346. The sheetmetal intakes are only for people who want to run way in excess of 7000 rpm. The LS6 runs out of steam about 6800rpm.

Ackattack

I wouldn't get the holley just because it weighs more, unless, like said above, you're going to run direct port n20

1CAMWNDR

iTrader: (21)

I don't think the Holley intake is worth ****. And there is no way you need that 80mm P.O.S. Get an LS6 intake [paint it if you want it to look different] and a ported Shaner throttlebody. <img border="0" alt="[Fluffy]" title="" src="graemlins/fluffy.gif" />
<img border="0" alt="[Firebird]" title="" src="graemlins/formula.gif" />

BADZ

iTrader: (5)

Nice info guy's!!!! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

99 Black Bird T/A

iTrader: (4)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BADZ:
<strong>Nice info guy's!!!! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">BadZ,

You have a fully ported Holley how did it compare with your LS6?

If anyone can shed the actual light of 1st hand knowledge on this issue it's BadZ.

<img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

Boo Yeah

It is not just inside the intake manifold that the holley hurts with heat. Though the air is traveling at a fairly high rate of speed heat soak does occur. The manifold holding heat also causes the throttlebody to hold heat. A hot intake charge is a terrible thing detonation can do tons of damage. The holley will be useful for cars that need the holley like maybe a 400up ci TT. This is where the holley will make more due to its ability to be ported. It was designed for that use in particular not for a 346 NA car.
Let see if I can explain this......
Thermal dynamics funny stuff.......
you are sitting at the light ready to launch and the car is already warmed up. The holley manifold is hot so now the intake charge due to lack of flow is gettig hotter. You launch now all the cold air rushes into the manifold. since there is a huge temperature difference the hot air is not all used before cooler denser air moves its way in and forces the hot air towards the to of the manifold. Due to the velocity that the cooler air is carrying it will not allow the hot intake charge to go into the combustion chamber, rather it will make a swirl as they battle for the rights of flow passages. Now you have an inefficient flow through your intake. I know it would seem like there really shouldn't be this much activity but there is. Maybe not as much as it sounds like, maybe not enough to make a difference but this is what thermal dynamics says should happen. Once again this is just my .02 cents but get the ls6, i am pretty sure someone can port those thngs anyways.

Elite_Hot_Rod

Onebadss,

First off let me say that Mr.1camwndr and Mr.boo yeah don't know their asses from a hole in the ground. I have the exact set up you are talking about on my 99 T/A see my sig. A ported Holley will make more RWHP's than a LS6 manifold, we did back to back dyno runs on mine when we were installing the Holley manifold. Granted it only made 7 more RWHPs than the LS6 but as they say every little bit helps. At this point I don't really think heat soak is as much an issue as people think it is, specially if you have N2O which I do. BADZs manifold is probably flowing more air than mine because he had Craig open up the runners some and I suspect he saw more gain than the 7 Hps I got. It really is up to you as to what manifold to go with but 1 thing is for sure you won't lose power with either one. Please excuse the length of the sig,which is why I don't use much anymore.

Mark

Todd2001SS

Since the Holley topic is up I have a question for anyone who can help. I want to buy the Holley intake, mostly for appearance, (don't shoot me down), I want to polish it.

1. My question is my car is an 2001, isn't the Holley made for 1998-2000. What needs to be modified on the intake to have it work properly on 01 LS1's? Is just capping the egr hole all that needs to be done??

Thank you for your help,

Todd

BADZ

iTrader: (5)

You guy's, as we just installed the long block last Sunday we have not had a chance to test the 2 manafolds on the car but you can bet that the intake will be worth a good 15+ rwhp over the plastic deal. There was alot of time invested in this one by Craig @ GTP himself so if one works "it will be this one"

Enough said... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

383ss

iTrader: (14)

BADZ - PLEASE post the results as soon as you can, with dyno graphs.

I've dyno'd the ls1 vs. unported holley with no other changes but not on the same day and saw a 3 rwhp gain. then switched to the ls6 a month or two later, redynoed and saw no additional gain. I was pretty dissapointed in both.

what also sux about the holley is that it uses a gasket and is a pita to take off or remove.

1CAMWNDR

iTrader: (21)

Hmmm. A $450+ intake that you then have to pay someone to modify and you get 7 RWHP. Just doesn't sound worth the hassle over an LS6 intake to me. That does not mean that I don't know my *** from a hole in the ground. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> The money could be putr to much greater use in other areas and get more HP, or actually hook the power you have to the ground.