What cam are you going to run?
Square Port LT Headers?
Square Port LT Headers? Does anyone know where one might find a set of headers designed to mate with Dart LT1 heads (square ports)?
Or is everyone just using oval ones with square gaskets and hoping they stay?
(I'm guessing there aren't a whole lot of us using Darts heads yet)
Or is everyone just using oval ones with square gaskets and hoping they stay?
(I'm guessing there aren't a whole lot of us using Darts heads yet)
Lloyd Elliott-ported Dart 180cc castings.
Now 211cc with 2.055"/1.60" valves and flow 299/212 @ .600"
(about 12% more than my LE2s did; and 16% over what Dart claims they flow out of the box)
http://i38.photobucket.com/albums/e1...mg_4554jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4558jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4556jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4555jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4551jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4542jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4559jpg.jpg
Now 211cc with 2.055"/1.60" valves and flow 299/212 @ .600"
(about 12% more than my LE2s did; and 16% over what Dart claims they flow out of the box)
http://i38.photobucket.com/albums/e1...mg_4554jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4558jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4556jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4555jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4551jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4542jpg.jpg
http://i38.photobucket.com/albums/e1...mg_4559jpg.jpg
Last edited by James Montigny; Jan 20, 2009 at 05:04 PM.
Details are on my Cardomain site (click sig).
Going to Ed's to have it tuned on the 30th.
I don't think LPPs are square ..
I think they were oval just like kooks, hooker and pacesetter.
(Since most LT1 heads have D-shaped ports)
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Hmm, I'll have to look into that.
I'm using my Jethots to break in the new motor, I wanted to go with something
with a stepped LT setup and try to pick up a few more HP later on.
These things are kinda beat up and I don't think the primaries quite clear the head ports in the corners.
I'm using my Jethots to break in the new motor, I wanted to go with something
with a stepped LT setup and try to pick up a few more HP later on.
These things are kinda beat up and I don't think the primaries quite clear the head ports in the corners.
If I do LPP, I'll wait on the redesign unless I find a killer deal on a set.
Still kinda looking for a good deal on a set of Kooks in the mean time.
Hmm, I'll have to look into that.
I'm using my Jethots to break in the new motor, I wanted to go with something
with a stepped LT setup and try to pick up a few more HP later on.
These things are kinda beat up and I don't think the primaries quite clear the head ports in the corners.
I'm using my Jethots to break in the new motor, I wanted to go with something
with a stepped LT setup and try to pick up a few more HP later on.
These things are kinda beat up and I don't think the primaries quite clear the head ports in the corners.
11.39:1 Static (optimal for the cam options I wanted available)
10.57:1 Dynamic (using Dynamic stroke math)
I've had this car for about 3 years now.
At first I was only going to do bolt-ons, then I did H/C ... now I'm in deep LOL
It's my third Fbody, so it's not like I didn't know what I was getting into.
You sure that dynamic is correct? That intake valve must close EARLY!
On the headers, It aint really gonna matter as long as the header is slightly bigger than the port and nothing is hanging over INTO the port.
Isnt the Hooker super comp a square port?
This is a pic from Hookers website, look at the gasket.
On the headers, It aint really gonna matter as long as the header is slightly bigger than the port and nothing is hanging over INTO the port.
Isnt the Hooker super comp a square port?
This is a pic from Hookers website, look at the gasket.
Last edited by FASTFATBOY; Jan 21, 2009 at 08:01 PM.
The DCR may be off some, but I' don't know if it is that far off. With the smallest possible 230/240 and 34 degrees of overlap you'd have to have a 100.5 LSA. With the largest possible 239/249 you'd have a 105 LSA. That's pretty crazy.
Beaflag, you're not far off LOL
And yes, the DCR is correct and the early close is intentional to trap cylinder pressure and maintain streetability.
FASTFATBOY, I didn't realize Hooker made square ports for an LT1. I'll have to check that out.
The goals being to stay bigger than the exhaust port on the head, prevent the gasket
from being cooked and make use of the anti-reversion properties of stepped headers.
If I have to use ovals, I will.
And yes, the DCR is correct and the early close is intentional to trap cylinder pressure and maintain streetability.
FASTFATBOY, I didn't realize Hooker made square ports for an LT1. I'll have to check that out.
The goals being to stay bigger than the exhaust port on the head, prevent the gasket
from being cooked and make use of the anti-reversion properties of stepped headers.
If I have to use ovals, I will.
Last edited by James Montigny; Oct 22, 2009 at 11:54 AM.