Gen III motor guys (LS1 based 4.8/5.3/5.7/6.0): header poll - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FirstGen · 01-30-2005, 06:45 PM

Seems like now that everyone is discovering these motors they are finding their way into anything and everything that moves. Including our trucks. Because I have a hard time shelling out 800 bucks for a long tube header designed for a 67-72 with a LS1 based motor I am building my own set.

I was wondering if there is any interest in a more affordable header if I was to produce a limited quantity of these? I'd like to know a few things:

1.) A head count of people that are first off, even interested in a set of headers for their LS1 based 67-72 truck, in the near future.
2.) What qualities would make the header most desirable - bearing in mind these will affect cost. (materials like stainless or just heavier guage mild steel)
3.) What is the most you would be willing to pay for a set.

The set I am building for my personal project will be using 1.75" primaries with a 3" collector. Nothing fancy just a nice and thick 3/8" flange for the heads and tig welded. I have the ability to construct a header from any material starting at mild steel even to titanium (bring your wallet).

I made a set of F-body headers fit once but I had to hack them up pretty bad, so I am finally biting the bullet here. Going from manifolds to my previous long tube headers I gained 26 rear wheel horsepower and 22 ft pounds of torque. You should expect that much with these with a good tune.

Let's hear some feedback...

68LSS1 · 01-31-2005, 12:06 AM

How about 1 3/4" stepped to 1 7/8" with 3 1/2" merge collector. O2 bungs and bungs for egt probes (8). Material to be steel (which I would have ceramic coated inside and out) or stainless. Right now my plans are to build my own or modify a set of Kooks which go for about $960.

GenIIIShorty · 01-31-2005, 12:18 AM

well, now i remember why i am going with a tpi motor for now.......that wonderful green stuff i don't have!

FirstGen · 01-31-2005, 12:31 AM

Yeah, The kooks are real nice units. I think you will find that they would take alot more modifying than it would be worth, especially since they are already more than 800 bucks. They are also a 3" collector not 3.5" unless they have started that recently?

Project1970 · 01-31-2005, 12:56 AM

Oh, so NOW you offer this up, after I've already got my shorties in :P

Depending on the timeframe you'd be doing this in, and the cost of a pair of headers (either coated or uncoated - I can run them right over to JetHot if I need to) I'd be very interested in this.

I'd ideally like to get out the door for the pair of headers and coating for $600 or less. If that can be done, and it can be done reasonably soon (and my mechanic can send back the shorties for at least a majority of a refund, heh) I am DEFINITELY in on this.

68LSS1 · 01-31-2005, 12:47 PM

Quote:

Originally Posted by FirstGen

Yeah, The kooks are real nice units. I think you will find that they would take alot more modifying than it would be worth, especially since they are already more than 800 bucks. They are also a 3" collector not 3.5" unless they have started that recently?

There is one picture in my album of the drivers side with the Kooks. I have other pictures showing where they are hitting. They can be gotten in 1 7/8" X 2" X 3 1/2" or the 1 3/4" X 1 7/8" X 3 1/2". Part number 6501-1RHS and 6500-2RHS. The problem with the Kooks as well as with all F-body long tubes (as I'm sure you've found out) is that they have to curve around the lower control arm on the Camaro. So when they are used on a swap into our trucks you end up with the collectors up against the frame and angled out. At least that's what I had with a set of Hooker LT's and the Kooks. I haven't talked to Kooks yet but it shouldn't be impossible for them to modify/build me a set.

And for Project1970, save your money until you can get the LT's. The shorties are not worth the money. If its more for looks then go for it but if your after performance it's not worth the cost plus what your giving up with the LT's.

Project1970 · 01-31-2005, 04:58 PM

I ran into the same thing there with F-Body longtubes: the collector goes straight into the frame. Were it not for that, they'd be great.

FirstGen · 01-31-2005, 05:06 PM

Yup, that's why I'm working on building a set. If there are only three people interested though I guess it will be a one off thing... sorry.

SCOTI · 01-31-2005, 07:15 PM

Hey guys, could you not cut the collectors off the f-body headers & swap them side-to-side so that they would point toward the trans vs. the frame?

Project1970 · 01-31-2005, 08:07 PM

F-body headers arent' usually symetrical passenger vs drivers' side, even for shorties.

01-30-2005, 06:45 PM	#1
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	Gen III motor guys (LS1 based 4.8/5.3/5.7/6.0): header poll Seems like now that everyone is discovering these motors they are finding their way into anything and everything that moves. Including our trucks. Because I have a hard time shelling out 800 bucks for a long tube header designed for a 67-72 with a LS1 based motor I am building my own set. I was wondering if there is any interest in a more affordable header if I was to produce a limited quantity of these? I'd like to know a few things: 1.) A head count of people that are first off, even interested in a set of headers for their LS1 based 67-72 truck, in the near future. 2.) What qualities would make the header most desirable - bearing in mind these will affect cost. (materials like stainless or just heavier guage mild steel) 3.) What is the most you would be willing to pay for a set. The set I am building for my personal project will be using 1.75" primaries with a 3" collector. Nothing fancy just a nice and thick 3/8" flange for the heads and tig welded. I have the ability to construct a header from any material starting at mild steel even to titanium (bring your wallet). I made a set of F-body headers fit once but I had to hack them up pretty bad, so I am finally biting the bullet here. Going from manifolds to my previous long tube headers I gained 26 rear wheel horsepower and 22 ft pounds of torque. You should expect that much with these with a good tune. Let's hear some feedback... __________________ 1968 C10 build in process TT LSA/6L90e/9"

01-31-2005, 12:06 AM	#2
68LSS1 Registered User Join Date: Dec 2002 Location: Tampa Posts: 1,191	How about 1 3/4" stepped to 1 7/8" with 3 1/2" merge collector. O2 bungs and bungs for egt probes (8). Material to be steel (which I would have ceramic coated inside and out) or stainless. Right now my plans are to build my own or modify a set of Kooks which go for about $960. __________________ '68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc

01-31-2005, 12:18 AM	#3
GenIIIShorty JUNK COLLECTOR!!!!! Join Date: Jan 2005 Location: Spokane, WA Posts: 514	well, now i remember why i am going with a tpi motor for now.......that wonderful green stuff i don't have! __________________ baby The dark side! 2000 XLT PSD F-250 4x4! Offroad package 1970 C10 Short-step soon to be short fleet, maybe? Corvette in truck's clothing in work! Corvette IFS, IRS, TPI and Doug Nash 4+3

01-31-2005, 12:31 AM	#4
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	Yeah, The kooks are real nice units. I think you will find that they would take alot more modifying than it would be worth, especially since they are already more than 800 bucks. They are also a 3" collector not 3.5" unless they have started that recently? __________________ 1968 C10 build in process TT LSA/6L90e/9"

01-31-2005, 12:56 AM	#5
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Oh, so NOW you offer this up, after I've already got my shorties in :P Depending on the timeframe you'd be doing this in, and the cost of a pair of headers (either coated or uncoated - I can run them right over to JetHot if I need to) I'd be very interested in this. I'd ideally like to get out the door for the pair of headers and coating for $600 or less. If that can be done, and it can be done reasonably soon (and my mechanic can send back the shorties for at least a majority of a refund, heh) I am DEFINITELY in on this. __________________ Project1970 - LS1 Swap Complete! Last edited by Project1970; 01-31-2005 at 12:58 AM.

01-31-2005, 04:58 PM	#7
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	I ran into the same thing there with F-Body longtubes: the collector goes straight into the frame. Were it not for that, they'd be great. __________________ Project1970 - LS1 Swap Complete!

01-31-2005, 05:06 PM	#8
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	Yup, that's why I'm working on building a set. If there are only three people interested though I guess it will be a one off thing... sorry. __________________ 1968 C10 build in process TT LSA/6L90e/9"

01-31-2005, 07:15 PM	#9
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	Hey guys, could you not cut the collectors off the f-body headers & swap them side-to-side so that they would point toward the trans vs. the frame? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

01-31-2005, 08:07 PM	#10
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	F-body headers arent' usually symetrical passenger vs drivers' side, even for shorties. __________________ Project1970 - LS1 Swap Complete!

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