Difference between Tubular and Cast

[SupraSpeed4u]

What are the main differences and Hp goal differences between the 2 manifolds and price. Just a good question to answer for all NA-T soon to be's. Thanks

[2jzFlyBy]

well from what I have learned tubular in the long run chips and breaks and cast last longer and holds up much more

[SupraSpeed4u]

Yes but tubular has better flow wich means higher HP ratings.

[nolimits]

Tubular is sexy :thumbup:

[2jzFlyBy]

Yes but tubular has better flow wich means higher HP ratings.


i totally agree, they do have a better flow, but i mean in the long run your going to have to replace it a few time cause tubular tends to crack, thats what i was saying, but kinda funny how you answered your own question..lol

[SecretSC]

Who's Tubular Manifold has problems with cracking?

[SupaSupraSE]

Yes but tubular has better flow wich means higher HP ratings.

Correct.

[champazn]

Tubular flows alot better then cast/log style manifold.

[SupraGOM]

tubular is puurdy...

[chitwnsazn]

How much better exactly? Is there a resource somewhere for comparisons? I'm not specualting but would like to see the gains/improvements.

[dejacky]

don't forget about the equal length headers Tubular CAST STEEL manifold being developed for the 2JZ-GE. That should be very nice! :op:

[2jzboy]

-Tubular manifold are lighter.
-They flow better, they have less back pressure (applicable for high hp engines racing)
-If they aren't well design or fabricated, they can crack very easy.

-Cast iron manifold are heavy.
-They mostly have more back pressure. (not good for high boost) There are cases where people have reach high hp with cast manifold. This is because they were used on big engines or the design of the cast manifold give the possibility for a better flow.
-Because it is casted, it difficult to fabricate complex designs like the tubular manifold. Complex designs will get very heavy.
-They are more reliable. Less possibility of structural failure. (good for street applications).
-Cast iron has a low heat conductivity which give the cast manifold the capability of spooling a turbo faster (a better heatflow to the turbo)

[WhiteBlazze]

Cast can flow well, and last practically longer than the engine will.


Turbular provides the best flow, more torque, and looks sweet!! Although they can crack, they are easily repairable. If you get a good quality tubular manifold, have it coated and on a well tuned vehicle....it should last a long time.

[Bean]

Of the higher end manifolds; most of them have warranties against cracking, so its not much to worry about

Also, the higher the grade the steel used in tubular manifolds, the better and more resistant to cracking they are... all of the nicer models (SP, BL, PHR, etc) all use SUS321 stainless (dont let the words "321" get you confused either, because that also refers to the design of the header layout too)

Tubular manifolds in higher horsepower applications make a HUGE difference... even at 400whp you can/will see a 30whp+ difference between the too. Spool lags a bit more but the top-end gains are well worth it. Almost all of the turbokits out there are tubular so nothing to worry about on the lag.