4SFEDZ

iTrader: (6)

ok just like the title says,,,,,,,, is there a big difference from tubular in flow and back pressure given the same size turbo, T4? there they are

blazin

iTrader: (16)

Unless your over 1000 hp Id say probally not much. Mainly looks better.

fenix999

iTrader: (17)

I'd say if you could curve those other 3 primaries slightly like that last primary header tube that would help quite a bit just by looking at it, but thats just me and my picky *** self. Then i guess that would be considered a tubular manifold depending on how far you take the curvature idea lol

Beaflag VonRathburg

iTrader: (176)

I'm sure you could do some basic calculations to figure the volume of the headers. Work with pulse timing and figure the volume of gas versus the volume of gas in the header at the time. That would give you a percent of volume occupied which you could roughly work with.

Frost

iTrader: (45)

They look nice.

chuntington101

what are you using them on?? Look good.

Denali08

Looking good. Any perf difference between those and truck manifolds in a turbo kit be it T4 or T6?

TurboZ28408

iTrader: (18)

twin logs will not flow OVER tubular headers, they will flow UNDER

Shearer

Those pictured will not flow nearly as good as a proper set of headers. Up to a point they will serve there purpose but will eventually become a restriction.

ls1290

iTrader: (20)

I agree. For cylinders 1 though 6, the exhaust gases are going to flow right into the side of the log. You want the entry tubes to be angled a little with the log rather than being a direct T.

kbracing96

iTrader: (25)

These are what I use on the truck kits. Seem to flow pretty well I think for a log. Plus being 3/16 thick, they are VERY beefy,

4SFEDSS

iTrader: (19)

What size are the primary's and the (log)?

Beaflag VonRathburg

iTrader: (176)

I noticed that in the name of the thread too. I think he was refering to the difference rather than saying they flow better than headers.

tim99ws6

iTrader: (31)

Depends on the craftsmanship. If the headers fabbed up are a pile of crap, they will flow....well...like a pile of crap through a pipe. A well setup tubular setup will outflow a log though.

Shearer

The craftsmanship of that header would have to extremely terrible to be out flowed by a log manifold.

tim99ws6

iTrader: (31)

I'd be happy to compare a home built poorly built header setup to a C6Z log manifold setup. Hell, I bet the 6.0 logs don't do too bad. Remember headers you have to start thinking about alot of other problems:

-Flange thickness
-Metal used
-bends
-welds

TrickPerformanceProducts

iTrader: (11)

Run them, concidering your primarys are so short I am betting you have a space problem. And there really is not way to angle them enough to make a difference with out greatly complicating spark plugs/wires etc.
Headers will flow better then logs but are not needed for most street rides.
What are you putting them in.?

kbracing96

iTrader: (25)

There just over 1 1/2 I.D. and 2 1/2 I.D. Sced 40 pipe weldells

pmbmax

I dont want to get in the middle of any contest . I run headers on my car but my cousen runs a super stock tractor 90 to 100psi of boost has log manifolds on intake and exhaust here is a link to a pic f the tractor. It really dont show the exhaust but he runs around 2 psi of boost to 1 psi of back pressure. we have talked many times of how i do good to get 1 psi of boost to 2 psi of back pressure just food for thought http://www.distributorless.com/media/rides.php

also see how much torque a 100psi will make http://www.youtube.com/watch?v=PhRUO...eature=related

93formto98T/A

iTrader: (28)

LOL! Gotta love that ending...do a full pull like it's a warm up then top it by running over the bleachers and all! lol