LS4 Front-Drives 2005-2010 - Homemade Headers

So i was thinking you could use this type of head for the rear

http://www.summitracing.com/parts/HED-68520/?image=large

Then use a Ported Vette or F-body Manifold or one like this on the front of the motor.
http://www.summitracing.com/parts/HED-62700/?image=large.
Then weld in a Y pipe connect the crossover to the outlet of the rear header.

That would be cool, but then you still have a whole extra set of headers/manifolds because you have to buy them in pairs....get a pipe bender, a good welder and start bending up some nice 4 into one exhaust mani's....:devil: Why wont someone do this for us....Damn W-Body following

man....look if manifolds fit, then headers gotta...does someone have pics of the room and a bottom shot? i just got fired but i get to still use there shop, i am kinda looking for work...

the 8.1l ones are for big block engines

That would be cool, but then you still have a whole extra set of headers/manifolds because you have to buy them in pairs....get a pipe bender, a good welder and start bending up some nice 4 into one exhaust mani's....:devil: Why wont someone do this for us....Damn W-Body following

Thats why i sujested using ported F-body/Vette exhaust manifolds up front, and then 2 different guys could buy the rear manifold and split the cost and each take one manifold.

the 8.1l ones are for big block engines

They were mostly referance photos. I have seen some just like that for the LS4.8-6.0 engines.

http://www.sandersonheaders.com/product_info.php?products_id=173

Something like these.

these on the rear.....

http://www.sandersonheaders.com/images/cc1ls1.jpg

that's a possible when compared to out stock mani

http://i549.photobucket.com/albums/ii385/mixerda/DSC00126.jpg

only prob I see is that still gotta have the cross over come in and meet up with the DP at some point and in this tiny ass spot getting you hand in there to bolt everything together is not gonna be fun at all

http://img518.imageshack.us/img518/2640/motordrop1rp5.jpg

the collector on rear mani might make contact with the fire wall also...be kinda close I might take a look into it at some point with my exhaust guy and see what he thinks is possible

Could you take a pic of the manifold exhaust port holes for me? Or do you have any you can share? Thanks in advance.

-Mike

mixerda, that should work. but the front header can look like this...
http://cgi.ebay.com/ebaymotors/98-99-CHEVY-CAMARO-FIREBIRD-TRANS-AM-LS1-EXHAUST-HEADER_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a 2Q7c39Q3a1Q7c72Q3a1171Q7c240Q3a1318Q7c301Q3a1Q7c29 3Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZi tem45ecb18fbaQQitemZ300323803066QQptZMotorsQ5fCarQ 5fTruckQ5fPartsQ5fAccessories
but cut the flange to wrap over the trans, and y them together at almost the bottom. shit if i had that header in my shop i would be able to do it with 2 180 bends and two 21/2 bends...
so yoy guys dont have any header options???

mixerda, that should work. but the front header can look like this...
http://cgi.ebay.com/ebaymotors/98-99-CHEVY-CAMARO-FIREBIRD-TRANS-AM-LS1-EXHAUST-HEADER_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a 2Q7c39Q3a1Q7c72Q3a1171Q7c240Q3a1318Q7c301Q3a1Q7c29 3Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZi tem45ecb18fbaQQitemZ300323803066QQptZMotorsQ5fCarQ 5fTruckQ5fPartsQ5fAccessories
but cut the flange to wrap over the trans, and y them together at almost the bottom. shit if i had that header in my shop i would be able to do it with 2 180 bends and two 21/2 bends...
so yoy guys dont have any header options???

Thats correct. No one want to make them due to low production numbers. We have only 1 exhaust system option(magnaflow), 2 1/2 Cold air kits(K&N, CAI, and FWI) Very limited on mass produced parts. I think this would be easy to do with a shop lol.

^^^if u go thru a shop your talkin over a grand for sum headers,man it would b nice though...

IVe been in contact with a guy at Milzymotorsports.com and they are willing to make headers for the LS4 cars. They just need a group of people to bring the cost down from 1000 to 800.

Not this again

From what reading I've done, these cars are severely limited by the Intake Manifold. Why don't we put our time and energy into that instead of a set of headers?

Because headers are easier. Intakes require alot of effort no matter what u do. Id be will but no money

If you take a look at the GTO headers 04-06 shorty style, they look the best in my opinion. I contact Hogan performance about this topic, an they bascially said they will never do it. SUCKS! Could someone get them to fit? I bet, make a custom crossover an collector merge it all into the DP. I think it could work tho.

Greg

Parts like Headers, Intake Manifolds, Cams, etc wont ever be made in large numbers(or at all) for the LS4.

This is a low production small block V8....if you guys want more power save your money and harden your transmission and turbo your car.

This is a FWD transverse mount engine application...just like the small Japanese engined cars, the only way to get a good amount of cost effective horsepower out of this type of drive train layout you have to force more air into the little lady with a turbo.

Turbo + Inter cooler + Transmission work = around 8 - 10 thousand dollars...so save up your money and go that route.




Personally these cars are fun DD's...that's what they were made for...if you want something to tinker with and make fast get an F-Body or a GTO.....06 BOM GTO is the next car on my list.

Or a new Camaro once they hit the used market. :devil:

i dunno i may be retarded or some shit but it just looks friggen easy??? and why dont a ls6-1 intake work on the cars???

i dunno i may be retarded or some shit but it just looks friggen easy??? and why dont a ls6-1 intake work on the cars???

http://www.ls1tech.com/forums/ls4-front-drives-2005-2009/856995-ls6-intake-getting-closer.html


This is were we are at with a LS6 or any other RWD manifold. It can be done just takes time, tools, and money :)


And as too why not get a -fbody or something else, I cant afford to newer cars, I need a four door front or awd car for the family. I like to MAKE things work. Like rossko has said to me, its just like our fathers and grand fathers had to do. They didnt have anything but 3 window coupes and flathead fords, nail head buicks. They took what they had, figured out a way and made it work.There is nothing some Inginuity and hard work wouldn't fix with this motor. Hell i have even been looking at stroking the motor. To me the biggest issue is trying to force all 8 cyl's volume into the rear manifold. If u could just get a f-body or vette manifold for the rear then join up the crossover at the exit of the rear manifold. That would be the cheapest and easiest route in which to improve back preasure and scavaging or the exhaust ports.

naw.....screw them f-bodys...i think a ls4 with just a good set of shorty headers and half way decent intake would be a damn nice gain and with a speced out cam you guys could have them little buggers throwing down 360+ if only anyone with one was close and had maybe 300 to throw into some gettho r@d i bet i can mak a sweet ass set of shorty headers that put out. shit + some texas speed 5.3 2.5s on them bitchez would be sweet too....

i think the way to make power on these get some heads that have the intake bolt pattern that the g8 gt has and get one of those manifolds...

as far as making things, this winter ill be working on making a bigger crossover and see if that helps anything im jobless right now though so i dont have any extra money for parts:bang:

I have the tsp heads on mine. Should have done more while it was ripped apart like a cam though. So sad.

ya we good decent factory 243 heads. But Damn them texas speed 2.5 heads have been rocking the local f-body guys. most them are like 420-450 with a simple H/C and Fast inatake. then over 500 with some N20

is the major issue with the intake manifold that people want to run dod with it?

No it's because they designed it with the oil pressure sender in an unfortunate/restricting location to save money and not have to engineer a whole new block since that is the standard location for ls1/2 etc engine blocks...

Another possibility would be to use a larger downpipe than 3 inches or dual 2.25s that y back together later on or something.

Should be able to mount the Oil preasor sensor of the side of the block by the Filter.

What about calling S&S or someone small and see if they would fab up a set? Or what about getting TOG's or SLP's for the 3800's and mod'ing them?

Just a few ideas.

What about calling S&S or someone small and see if they would fab up a set? Or what about getting TOG's or SLP's for the 3800's and mod'ing them?

Just a few ideas.

You could probably use a set of 3.8L headers as a guide since they have to clear the same subframe and whatnot.


Also like the idea of mounting the pressure sender down by the filter...this guy may be on to something.

The only issue is the cars that had the 3.8 L67/L32's had more room in the engine bay than we do. Your right about using them as a guide and having the cross over pipe connect into the down pipe. This would allow the transfer of exhaust to more faster and open up the LS4 for better performance.

The only issue is the cars that had the 3.8 L67/L32's had more room in the engine bay than we do. Your right about using them as a guide and having the cross over pipe connect into the down pipe. This would allow the transfer of exhaust to more faster and open up the LS4 for better performance.

From what I'm reading, the two major issues with LS4 performance is intake and headers. Now, we have good heads and a decent cam...honestly, if the engine won't flow to it's maximum potential with the stock cam, there's no reason to upgrade until these two items are taken care of. Now, the LS6 manifold thread seems to have died for the time being, but from what I read the main problem was the oil pressure sender, am I right? What else was a big deal? TB mounting?

the electrical connector for the DOD, Mounting up the sensor locations, fuel rail issues.

the electrical connector for the DOD, Mounting up the sensor locations, fuel rail issues.

What kind of fuel rail problems?

Tired mentioned it on his right up. im assuming the LS6 intakes bulges are bigger placing the fuel rail off center.

Time they make the headers, our cars will be in the junk yard.

From what I'm reading, the two major issues with LS4 performance is intake and headers. Now, we have good heads and a decent cam...honestly, if the engine won't flow to it's maximum potential with the stock cam, there's no reason to upgrade until these two items are taken care of. Now, the LS6 manifold thread seems to have died for the time being, but from what I read the main problem was the oil pressure sender, am I right? What else was a big deal? TB mounting?

Sorry, but you can have the best cam and heads in the world, but if the intake/exhaust manifolds are as restrictive as the ones we have now then by opening them up ( headers or even ported ) you will allow better air flow which in return will allow more HP due to the bottle neck of the exhaust problem we have now.

GM put a fucking V8 in with a V6 thinking exhaust. Not the best thing in the world. :bang:

Sorry, but you can have the best cam and heads in the world, but if the intake/exhaust manifolds are as restrictive as the ones we have now then by opening them up ( headers or even ported ) you will allow better air flow which in return will allow more HP due to the bottle neck of the exhaust problem we have now.

GM put a fucking V8 in with a V6 thinking exhaust. Not the best thing in the world. :bang:

What do you think I just said? That was the entire point of my post re-worded. Our two limitations are intake and exhaust. without one the other won't help out nearly as much.

Just making sure you understood what I was talking about ;)

The only problem i have with all of this is that i ported everything out, did a new exhaust and cold air and only saw a gain of about 20hp. So i am thinking if we did manage to created headers and or intake manifolds, we would not gain much. MAYBE 15hp if we did both

idk about 15hp didnt the ls1 cars gain a decent amount with the ls6 intake? and the ls1 intake is def an improvement over what we have goin on over here.

Everything goes in pairs.

Open up the intake and the headers together will make about 25HP

Open up the exhaust and that could add up to a total of 30-35HP total