Tubular Manifolds Vs. Not

[badinfluenceRS]

Which is better? Tubular Manifolds or "normal" style...

I always believed tubular were better, however, my friend brought up a good point in that "normal" style manifolds seem to sweep down were tubular ones have sharp bends...

so, whats the answer?

[TheGr8Schlotzky]

Re: Tubular Manifolds Vs. Not

what is "normal" style?

I'm guessing your not talking about log manifolds..just take one look at them and you see tubulars would flow a ton better.

[Smoke Panther]

Re: Tubular Manifolds Vs. Not

Yea, it's really confusing when people paraphrase mechanical components...ANyways, I hope to god you're not talking about log manifolds as being "normal" manifolds. if that's the case, tubular manifolds are vastly superior to log manifolds in every way, shape, and form.

[badinfluenceRS]

Re: Tubular Manifolds Vs. Not

OK, The manifolds on my 307 are smooth and round, however they do not seem to have smooth bends and have rather sharp bends. My friend thought that non-tubular manifolds (such as on my 96 3.8) would flow better because the design seems to sweep away better.

I thought the "inside" of the manifold is what made more a difference when it comes to manifolds...

[josh98bird]

Re: Tubular Manifolds Vs. Not

there are bends on the tubular but for the "normal" you have less overall room for better flow

[Smoke Panther]

Re: Tubular Manifolds Vs. Not

My friend thought that non-tubular manifolds (such as on my 96 3.8) would flow better because the design seems to sweep away better.

Your friend thought wrong. Without a doubt, log manifolds are the most restrictive exhaust manifolds to ever attatch themselves to the sides of an engine.

[crysmatic]

Re: Tubular Manifolds Vs. Not

Your friend thought wrong. Without a doubt, log manifolds are the most restrictive exhaust manifolds to ever attatch themselves to the sides of an engine.

x2. zzp's powerlogs may flow better than stock, but logs are basically just space savers. it also conserves material, and lowers weight (as opposed to casting long runners).

it's not just better flow either. long tube headers also super scavenge at a design rpm due to resonance tuning. equal length primaries are very important.