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View Full Version : LS header size


MonteC
05-23-2010, 10:46 PM
What size primaries would you run on a heads and cam ls1 motor? Stepped?

1 Slow Z
05-23-2010, 11:23 PM
1 3/4 would be just fine IMO.

Matts94Z28
05-23-2010, 11:32 PM
I would go bigger... it's not TOO much more and you will only have to do it once. You wouldn't want it to be a restriction down the road.

BigdaddyDupree
05-23-2010, 11:41 PM
most s-10 swap headers are 1 7/8 at least the ones i am looking at from BRP

1 Slow Z
05-23-2010, 11:48 PM
Either or would be fine, but that's just my .02

soccerspike15
05-24-2010, 12:25 AM
1 7/8 period

slowgreen99
05-24-2010, 01:36 AM
1 7/8 period

Damn right! If Greg said it, then id ride with it. That bitch sets records!

1998ta__1991rs
05-24-2010, 03:31 AM
i'd go 1 7/8" you're going to lose some low end but you'll more than make up for it up top

jmd
05-24-2010, 05:11 AM
1 7/8 arh.

Blubird
05-24-2010, 07:56 AM
It doesn't matter that much. If your buying brand new might as well get the 1 7/8. If your getting used headers find the best deal don't worry if it's 1 3/4 or 7/8.

Derek
05-24-2010, 08:40 AM
hey monte check this out

http://store.edelbrock.com/65683victorserieslongtubeheadersfor2000-02camarofirebird57lls1off-roadcompetitiononly.aspx

minytrker
05-24-2010, 02:39 PM
I would just buy the cheapest ones you can find unless you are trying to get every last hp out of it. The hp difference in the $1k+ and the $300 headers is maybe 10hp. If your looking for the best ones, either kooks or arh stainless.

MonteC
05-24-2010, 02:45 PM
WELL. They are going to be brandy new. I cant just buy these headers from anybody, they are swap headers for my monte carlo.

I have a few options to pick from, so i wanted to know what the best was to go for.

BAD BOB
05-24-2010, 03:11 PM
IMHO the 1 3/4 will work just fine for motor and some NOS. once you get to a big shot or a big cube motor then worry about the bigger headers. most the time a smaller motor you wont turn really really hard so its better to have the low end to use the most of what you got. i went to 1 7/8 headers and didnt notice much change at all even on the 250 shot. but i dont know much about it since i have a ford but Greg knows so just do as "THE MAN" on radials says

BAD BOB
05-24-2010, 03:14 PM
i also got a set of headers that are modified for my car but hug the motor tight so they may fit yours, if you are interested call me and we can see about checking them out. Robert 200-3196

FRDnemesis
05-24-2010, 09:53 PM
hey monte check this out

http://store.edelbrock.com/65683victorserieslongtubeheadersfor2000-02camarofirebird57lls1off-roadcompetitiononly.aspx



I had a coated set of those and loved them! Easiest set of headers I've ever installed, great plug access. My only gripe was that the High Velocity Merge collectors were slip fit and they seemed to suck a little air at idle, throwing fuel trims off a bit. I've known others that didnt have my same experience with that merge collector, so maybe I just had a loose set. For the money it is the best of both worlds and if you know anyone that can do some specialized wire welding, you can have the HVMC's welded on before you even install them. Then all potential problems are cured!

MonteC
05-24-2010, 10:14 PM
i also got a set of headers that are modified for my car but hug the motor tight so they may fit yours, if you are interested call me and we can see about checking them out. Robert 200-3196

let me get the motor set in the car. Then we can see how they look. What are the specs?


Im sure we will talk at the track sooner or later.

slowgreen99
05-25-2010, 01:21 AM
let me get the motor set in the car. Then we can see how they look. What are the specs?


Im sure we will talk at the track sooner or later.

1 7/8" custom Bad Bob built. Ceramic coated. They look very nice.

1998ta__1991rs
05-25-2010, 02:03 AM
1 7/8" custom Bad Bob built. Ceramic coated. They look very nice.

probably talking about the 1 3/4 ones he had before, hes probably going to need the 1 7/8 for the new setup

slowgreen99
05-25-2010, 10:25 AM
probably talking about the 1 3/4 ones he had before, hes probably going to need the 1 7/8 for the new setup

Oh, well I thought he mentioned 2" primaries? Maybe not then.

MonteC
05-25-2010, 01:50 PM
My oil pan should be here tomorrow. I need to go ahead and pull the trigger on the swap kit, get that on its way here. Gotta load the car and and haul it to the shop, pressure wash the underbody and engine bay.

Hey robert do you want a bobs masterbend custom exhaust for a gbody? Ive got one....

Matts94Z28
05-25-2010, 02:19 PM
No way... the Monte is about to move?!?!! Did you bump your head?

MonteC
05-25-2010, 06:57 PM
Sold the Fiero. Ive got a guy working on the transam, he hauled it to his house. Now i have room at the shop.

Got two more cars i need to sell though....

soccerspike15
05-26-2010, 12:59 AM
rob you need to go to the doctor and get checked