WHO makes 1 5/8 headers??
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Race Director
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WHO makes 1 5/8 headers??
I have decided that a stock L-98 needs the smaller tubes.....now where do i find them! i live in ontario, and i am having a tough time....besides hedman, who do i go with?
Team Owner
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From: SE NY
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Re: WHO makes 1 5/8 headers?? (88BlackZ-51)
I'm not sure about the Headmans but I know that SPE makes a set for our Vettes.
Maybe you could contact Headman and ask which would best fit your application with those #113 "D"-port heads.
Maybe you could contact Headman and ask which would best fit your application with those #113 "D"-port heads.
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: WHO makes 1 5/8 headers?? (88BlackZ-51)
Check the GP at the top of the page in the C4 parts for sale section. Very nice headers, I have them. They come w/ free connector pipes too.
Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
Check the GP at the top of the page in the C4 parts for sale section. ..
...Since there is no "GP at the top of the page in the C4 parts for sale section"... ;)
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: WHO makes 1 5/8 headers?? (Rich B.)
Check the GP at the top of the page in the C4 parts for sale section. ..
It's always a good idea to post the URL so that others (like myself) can take a look...
...Since there is no "GP at the top of the page in the C4 parts for sale section"... ;)
It's always a good idea to post the URL so that others (like myself) can take a look...
...Since there is no "GP at the top of the page in the C4 parts for sale section"... ;)
http://forums.corvetteforum.com/zerothread?id=751379
Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
Hmmm, then what's this...http://forums.corvetteforum.com/zerothread?id=751379
If I go to the left margin and click on C4 Parts For Sale/Wanted, it doesn't show up...But if I click on your link, I can see it...
Maybe my browser [Mozilla], or maybe a glitch with the Forum (been some screwed up dates lately)...
In any event, the URL is what I wanted, so Thanks! :thumbs:
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Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
There isn't? Hmmm, then what's this, that I just got off of the top of the page in the C4 parts for sale section?
Bad coding on Zeroforum's part, but good to find it out! :thumbs:
Another good reason to post the thread URL! (But feel free to come over and smack the poopie out of me). :crazy:
[Modified by Rich B., 7:49 AM 3/27/2004]
Large Impressive Member
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: WHO makes 1 5/8 headers?? (Rich B.)
Glad to see you found it anyway. I usually would post a link when referencing it but I first replied to this post during my insomniac hours, I didn't think about it. :crazy:
Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
Glad to see you found it anyway...
(I posted a note to the Mods in Help Forum; maybe they can reset the Forum settings for pinned topics).
[Modified by Rich B., 8:07 AM 3/27/2004]
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: WHO makes 1 5/8 headers?? (Rich B.)
They are 304 and they are beautiful. The picture on their (Stainless Works)website does not do them justice at all! Anything bigger than 1 5/8" is useless to anyone not making 500 HP and running at WOT all the time. But you can't convince many on this forum of that. These will give much better low and mid-range torque than the bigger tubes. Check out headerdesign.com and play with their header size calculator.
Race Director
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From: The Top of Utah
Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
Anything bigger than 1 5/8" is useless to anyone not making 500 HP and running at WOT all the time. But you can't convince many on this forum of that.
RACE ON!!!
Race Director
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Re: WHO makes 1 5/8 headers?? (Corvette Kid NC)
They are 304 and they are beautiful. The picture on their (Stainless Works)website does not do them justice at all! Anything bigger than 1 5/8" is useless to anyone not making 500 HP and running at WOT all the time. But you can't convince many on this forum of that. These will give much better low and mid-range torque than the bigger tubes. Check out headerdesign.com and play with their header size calculator.
Melting Slicks
Joined: Aug 2001
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Nathan Plemons)
You won't convince me because I picked up 23 horsepowe and 32 pounds of torque...
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: WHO makes 1 5/8 headers?? (Nathan Plemons)
They are 304 and they are beautiful. The picture on their (Stainless Works)website does not do them justice at all! Anything bigger than 1 5/8" is useless to anyone not making 500 HP and running at WOT all the time. But you can't convince many on this forum of that. These will give much better low and mid-range torque than the bigger tubes. Check out headerdesign.com and play with their header size calculator.
You won't convince me because I picked up 23 horsepowe and 32 pounds of torque by going with 1 3/4 headers over the stock manifolds. Nowhere in the power band did I give up any torque. Sure I might have gained a little more low end with 1 5/8 headers, but now I've got more room for future power mods without having to worry about the exhaust. 1 3/4 is also readily available :cheers:
You won't convince me because I picked up 23 horsepowe and 32 pounds of torque by going with 1 3/4 headers over the stock manifolds. Nowhere in the power band did I give up any torque. Sure I might have gained a little more low end with 1 5/8 headers, but now I've got more room for future power mods without having to worry about the exhaust. 1 3/4 is also readily available :cheers:
Race Director
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Re: WHO makes 1 5/8 headers?? (Rich B.)
You won't convince me because I picked up 23 horsepowe and 32 pounds of torque...
I have no argument with that. Just out of curiosity, though, do you know where the torque peaks now??? I'm guessing it is higher up the curve, but do you know what RPM???
I have no argument with that. Just out of curiosity, though, do you know where the torque peaks now??? I'm guessing it is higher up the curve, but do you know what RPM???
Here are all my dyno graphs, take a look. http://www.wku.edu/~nathan.plemons/h..._corvette.html
BTW the headers were the best seat of the pants improvement I've done. That torque spike in the middle is a lot of fun. Being able to smoke the tires from a roll at ANY speed in 1st or 2nd is good. If the conditions are just right I can break it loose in 3rd.
It's always fun to part throttle it and stay beside somebody, look over & wave then nail the gas. The massive wheelspin from a roll suprises most people.
[Modified by Nathan Plemons, 7:33 PM 3/27/2004]
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From: The Top of Utah
Re: WHO makes 1 5/8 headers?? (Nathan Plemons)
and you are right it's up there, around 3500-4000 RPM's, which may be too high for a typical TPI.
The surprising thing is that it didn't give up anything below that peak.
RACE ON!!!
Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Nathan Plemons)
You see prior to installing the headers the LT1 didn't have a torque peak, it's power band looks like Kansas...
A stock, new '86 L98 put out ~250 #/ft @ 1000rpm, rising to ~330 @ 3300 rpm, then falling rapidly to ~230 #/ft @ 4800 rpm**...Nothing like that LT1 curve... :(
I would like to see what a set of 1 5/8" headers would do to bring the max torque in earlier...
**(Numbers from my '86 owners manual) I don't believe the over-optimistic book L98 numbers compare with your actual LT1 numbers; but the curve itself is informative. Getting all your torque in at 2100 rpm is outstanding... :thumbs:
[Modified by Rich B., 9:28 PM 3/27/2004]
Melting Slicks
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From: Lockport NY
Re: WHO makes 1 5/8 headers?? (Nathan Plemons)
...prior to installing the headers the LT1 didn't have a torque peak, it's power band looks like Kansas. Installing the headers did create a peak...
That first [stock?] torque curve looks positively unnatural...The stock LT1 must be strangling from that restrictive exhaust...Your last torque curve looks normal, for an engine that's breathing [and revving] freely...
But the power comes in too far up the band for my taste...I like my torque down low, where I can use it, and not have to constantly shift to stay on the powerband...But I don't have an LT1 either... :(