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?

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

What would be the benefit, the stock port is only 1.390" x 1.410".

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

The diagonal of that (approx) rectangle is 1.97"

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

I cheated...and made my own!

http://a8.sphotos.ak.fbcdn.net/hphot..._4459310_n.jpg

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. :)

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

Showoff! :lol:

They are nice though. Too bad I wouldn't get any benefit from them otherwise I'd chuck my 1 3/4" Jet-hots for 1 7/8" with an x-pipe.

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?

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

Nice Ellis!

I'm with Injuneer, spill the engine specs.

-Dustin-

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

My question was directed at the Original Poster.

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!

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.

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

I meant that too, I should have specified.

-Dustin-

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

Yeah I never really posted there either. Besides it makes the new guys feel better ;)

The reason I went with big pipe happens to be in the 1,200FWHP range ;)

Re: 1 7/8" headers on an LT1 possible? or stepped 1 3/4" to 1 7/8" headers
 

Ellis, at what point to you need bigger than 1 3/4"?

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.