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Old 10-13-2009, 12:00 PM   #1 (permalink)
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Impala SS headers TRI Y VS Long Tube

I have a 1996 Impala SS and going to buy a set of Headers to put on my Impala SS over the winter. I have looked at the web pages of Focuztech and Clear Image Automotive. I will go with the export pipes to my cat back exhaust system. What are the best headers to use Long Tube or TRI Y.

In the future a cam and aluminum heads will be next.

I have a Spintech cat back exhaust system and a CIA cold air intake..

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Old 10-13-2009, 06:46 PM   #2 (permalink)
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Quote:
Originally Posted by HERD546 View Post
I have a 1996 Impala SS and going to buy a set of Headers to put on my Impala SS over the winter. I have looked at the web pages of Focuztech and Clear Image Automotive. I will go with the export pipes to my cat back exhaust system. What are the best headers to use Long Tube or TRI Y.

In the future a cam and aluminum heads will be next.

I have a Spintech cat back exhaust system and a CIA cold air intake..

I think performance wise, long tube.

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1996 Impala SS DCM, Powerdyne Supercharger 6 psi, 3.73s, Snow Performance Water/Meth injection, Borla catback system, Grotyohann long tube headers, Magnaflow high flow cats, Hotchkis springs, front and rear sway bars, Bilstein shocks, Vigilante 3000 stall TC.

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Old 10-13-2009, 07:10 PM   #3 (permalink)
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How wild are you going to go with the heads and cam??

IMO having had three different sets of headers on this car I think folks get carried away with bench racing which header is "better".

I have bought headers from both companies and Focuztech will get all my future business.

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Old 10-14-2009, 11:49 AM   #4 (permalink)
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this is the set up I'm planning to buy next month

http://www.focuztech.com/product/tri...impala-ss.html

with the hook up pipes and and the man flow hi-flow cats...

I feel that is the best out there in the market...thats my opinion, I'm dont know alot about sh** but if you email mike that foucztech he will response that day if not the next and he'll help you out..

also alot of my parts were order from him...

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Old 10-14-2009, 03:15 PM   #5 (permalink)
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RE:Impala SS headers TRI Y VS Long Tube

My Plans are the Edlebrock EDL-61909 Heads or the TRICK FLOW Heads.

GM has a Marine Cam that has lots of Low and Mid range Torque that is run by guys that do lots of Auto Cross.
The Marine Cam PN.14097395 and 1.6 comp cams roller rockers

I do not plan on changing from the 3:08 gears, But maybe later on to like a 3:42 gear and Eaton Tru Trac posi..

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Last edited by HERD546; 10-14-2009 at 04:58 PM.. Reason: more info
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Old 10-14-2009, 04:58 PM   #6 (permalink)
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Quote:
Originally Posted by HERD546 View Post
My Plans are the Edlebrock Heads or the AFR Heads.

GM has a Marine Cam that has lots of Low and Mid range Torque that is run by guys that do lots of Auto Cross.

I do not plan on changing from the 3:08 gears, But maybe later on to like a 3:42 gear and Eaton Tru Trac posi..
I hope to go the GLD friday, why don't you come up and meet me? The track might even let me give you a ride so long as I keep is slower then 13.50

I am happy to help you learn from my MANY mistakes.

Your plan is not a good one.

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Old 10-14-2009, 07:30 PM   #7 (permalink)
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RE: Impala SS headers TRI Y VS Long Tube

DwaynJ,

Not sure what your plan is, it looks like rain on Friday night

I will be at Fuddruckers on Thursday Night. At the HERD meeting I would like to meet you at the meeting @ 7:00 PM.
We will be at the North Downers Grove store near Fry's Electronics.

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Old 10-14-2009, 08:08 PM   #8 (permalink)
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http://www.wunderground.com/cgi-bin/...union+grove+wi

30% chance of rain.

Can't make the HERD meeting, I live all the way up near Green Bay so I don't even get down as far as GLD often.

If friday is a wash out I might make it saturday. I just know I want to make some more passes while the weather is good.

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Old 10-16-2009, 05:41 PM   #9 (permalink)
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Impala SS Headers

It looks like the TRI Y headers will be the way that I will be going.
From talking to my local tuner he feels that the TRI Y is the way to go
for the mods that I intend to do to the car.

I did some looking in to into the cam that I want to use and its the cam GM uses
in the HT383 and the Ramjet 350 Crate engines.

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1995 BLACK Carprice SS WAGON SOLD..
1992 Dk Gray Caprice SS WAGON SOLD..
2008 Impala LT
2002 Impala LS
2009 White TAHOE Z56 PPV..
HERD Club Vice President & Events Coordinator.

Last edited by HERD546; 10-17-2009 at 07:52 PM.. Reason: Cam info
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Old 10-17-2009, 07:42 AM   #10 (permalink)
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On the "other" forum before the crash, there was a discussion about long tube equal length headers versus Tri-Y type headers. [There may also have been a test comparision on one of the SpikeTV Powerblock shows.] My recollection is that the Tri-Y type had a significant boost in low- and mid-range torque over the equal length type. The equal length did have a small advantage in top end power. Unless your car is going to be an all-out race car [track only, never on the street, so that low/mid range torque is not a big concern], then it sounded like the Tri-Y were a better choice. Also with our heavier cars, more torque is almost always a better choice.

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Old 10-17-2009, 10:09 AM   #11 (permalink)
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All this header THEORY bench racing goes right out the window when the header has to actually fit in a chassis whichh pretty well stops the header from being optomized.

I have had 1 5/8 midlength, tri-y and 1 3/4 longtubes on the car and can not tell any major difference. The stall and gear the 4L60E lets us run means the "low end torque" argument is almost meningless unless you use really poorly selected parts.
I am coming from a position of EXPERIANCE.

Even the pickiest of us will be fine with 3.42/2800 stall, most are fine with 3.73/3200 stall, That is a lot of torque multiplication and a lot of help getting the engine into the powerband.

Lowend torque is a good thing BUT is more often used as an excuse for a combination that doesn't work is still "good"
Within the pcm's 7000rpm hard limit and with the gear and stall we can comfortably run only bad parts selection will result in poor lowend drivability. There are cars that don't 60ft well because of poor lowend output, but that is bad parts selection not a necessary part of making HP.

If I were to spend money on a 4th set of headers I might try 1 5/8 longtubes just to see if they improve plug access.

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Old 10-29-2009, 06:10 PM   #12 (permalink)
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Herd546 i will be at the meeting and you can take a look the the Tri-y long tubes. I have them and i got them from clearimage. i have their whole exhaust system. And it sounds really healthy with their exhuast system. I also noticed a increase within reason of gas mileage going up. Plug access isnt bad, The worst one is the back passenger but i can show you what you can do for the if you'd like. It will require a spark plug socket and a china wrench too. Sadly my craftsman socket was all i had but it makes it easier.

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Old 10-29-2009, 06:43 PM   #13 (permalink)
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When talking plug access it helps to state whether you have iron or aluminum heads. Iron are straight plug aluminum are angled.

I had one set of headers that fit fine with the iron but had plug clearance issues with the aluminum. Not wire clearance issues PLUG clearance.

If all goes as planned I am going to GLD saturday for you chicago guys that might want to come up.

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Old 10-29-2009, 11:35 PM   #14 (permalink)
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im still using iron heads. I dont remember where i read it but it said that the iron heads did flow better after port and polish than the aluminum heads. plus the strength is always a plus lets face it an additional 35 pounds is not going to make much of a difference on a 4500 pound car. my .02

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Old 10-30-2009, 04:06 AM   #15 (permalink)
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If the iron heads are substantially ported they are prone to cracking, the aluminum are where it is at for serious performance. The aluminums have no durrability issues

That said it is my interntion to mildly port a set of iron heads for my wagon.

As cast the irons flow more than the aluminums but fully ported I have yet to see a pair of irons perform and LAST the way the aluminums do. The irons are also not repairable should something happen like a crack.

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