1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
12-17-2011, 08:01 PM
#1
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1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
OK,
I have a question.
Is a true 1 7/8" diameter header possible on an LT1?
Someone told me that the distance between exhaust ports on the LT1 heads isnt wide enough to accomodate true 1 7/8" headers.
They said you can have a stepped design where its 1 3/4" and then after a couple inches it goes to 1 7/8" diameter, but not 1 7/8" from the get-go.
Is this true or BS?
I have a question.
Is a true 1 7/8" diameter header possible on an LT1?
Someone told me that the distance between exhaust ports on the LT1 heads isnt wide enough to accomodate true 1 7/8" headers.
They said you can have a stepped design where its 1 3/4" and then after a couple inches it goes to 1 7/8" diameter, but not 1 7/8" from the get-go.
Is this true or BS?
12-17-2011, 10:38 PM
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12-19-2011, 12:47 AM
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
I think Kooks offered their LT1 headers in 1 7/8" when they first started making them. I have a set of their stepped race headers on my bird. You might try giving them a call. 
12-19-2011, 02:59 AM
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12-19-2011, 05:19 AM
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
The question at this point would be, what has been done to the engine that requires 1-7/8" full-bore headers?
12-19-2011, 04:21 PM
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12-20-2011, 12:45 AM
#10
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
I tend to agree with Injuneer. Mine are 1 7/8th stepped to 2in for high RPM and a big shot of juice.
I would never go this big on a true street car with a LTx.
BTW Fred where did my other 9,000 posts go? Hech I was one of the first to break 1,000 posts in 98!
I would never go this big on a true street car with a LTx.
BTW Fred where did my other 9,000 posts go? Hech I was one of the first to break 1,000 posts in 98!
12-20-2011, 05:14 AM
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
About a year ago they purged the system. They claimed it was mostly "Lounge" posts, but I lost more than 20,000 posts (I was closing in on 50,000) and I NEVER post in the Lounge.
12-20-2011, 10:17 AM
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12-21-2011, 12:22 AM
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
The reason I went with big pipe happens to be in the 1,200FWHP range
12-21-2011, 07:33 PM
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
12-21-2011, 10:20 PM
#15
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Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
It will be a 383 lt1 9.5:1 pushing 20 psi boost thru a vortech ysi w/ meth injection and trick flow, stage III ported heads, w/ monoblade throttle body.
Prob a 230 ish blower cam.
I was talking with LE about this after I posted this question and he definitely recommend true 1 7/8" vs. stepped.
My HP goal is just north of 700 rwhp.
Prob a 230 ish blower cam.
I was talking with LE about this after I posted this question and he definitely recommend true 1 7/8" vs. stepped.
My HP goal is just north of 700 rwhp.