Mazda 626 Intake Manifold = ********** Intake Manifold

[igdrasil]

Im sure it will loose some top end. Our cars have DUAL RUNNERS, the secondary chamber, this gives a lot of our top end.

The 626 manifold is designed for torque @ low rpms, so the IM designed for it has to have smaller diameter runners or maybe the same as ours, to keep torque high @ low rpms, no benefit at all @ high rpms

 

[pluto316]

Im sure it will loose some top end. Our cars have DUAL RUNNERS, the secondary chamber, this gives a lot of our top end.

The 626 manifold is designed for torque @ low rpms, so the IM designed for it has to have smaller diameter runners or maybe the same as ours, to keep torque high @ low rpms, no benefit at all @ high rpms

I believe this to be 100% correct. We gain small gains in power and also gain better emissions. I personally wouldn't change intake manifolds untill a short straight runner manifold is produced.

 

[Nightmare]

i cant just unplug my EGR and put a plate over it now can i?

 

[wicked]

Im sure it will loose some top end. Our cars have DUAL RUNNERS, the secondary chamber, this gives a lot of our top end.

The 626 manifold is designed for torque @ low rpms, so the IM designed for it has to have smaller diameter runners or maybe the same as ours, to keep torque high @ low rpms, no benefit at all @ high rpms

this is true for the N/A guys.

 

[Mallard]

this is true for the N/A guys.

it's true for everybody.

 

[D323]

it's true for everybody.

No. Usually, you dont want dual runners in a FI setup... most times you want a simple single runner.

 

[thejoker0409]

Is this going to be a good mod for a daily driver around town?

 

[Mallard]

No. Usually, you dont want dual runners in a FI setup... most times you want a simple single runner.

No, the principles are the same. Just check out the dual runner manifold on my buddy's DSM. First pull was with short runners, the second was with long.

 

[A.V.MSP]

This is what I was thinking, I know shorter runners are for top end and longer ones are for bottom, why would we want more bottom end if everyone is complaining about traction? now if the runners are infact bigger what would that do? that much more torque or more HP with the added torque?

 

[Alejo_NIN]

it will be interesting to see our gains...coz if not...it will be a waste of time...someone has to do it first....we'll never know otherwise...

 

[wicked]

I will not want to gain any low end,I have a GT28RS w/ ported head,I don't want to have more traction problems then I have,after I launch,I don't touch anything on the low end.

 

[^tyrant^]

subed

 

[igdrasil]

Im trying to find the dynos made by FlyinMiata, testing 2 manifolds: Stock and Short Runners...on turbo miata...its a big difference.

 

[wicked]

I had a focus book written by focus central,they made a mani that they could adjust the runners on,and when they did it on thier turbo focus(2.0 GT28RS powered) they endid up with a mani that had runner over 8" long,and they dynoed over 20 different leanghs.

 

[D323]

No, the principles are the same. Just check out the dual runner manifold on my buddy's DSM. First pull was with short runners, the second was with long.

That proves nothing. You need to compare a dual runners manifold to a single runner manifold. Not short runners vs long runners in a dual manifold.

I'd be curious to see those Miata dyno charts, b/c I can tell you on the BP in the older proteges, the NA BP's in North American intakes are dual runners. Yet in the overseas "performance" motors (GTX/GTR) they use a single runner intake manifold. Mazda wouldn't go through the hassel of redesigning a poorer flowing intake manifold for the "performance" motors.

 

[wicked]

this is lame

this may not be the ideal manifold for the car,but that doesn't matter for s*** right now.

what matters is if it gains ANYTHING.
it is such a cheap manifold,that if it gains more then a few HP along anywhere on the rpm range,and doesn't lose any I am down,no question about it.

 

[FSDET]

so true

 

[Alejo_NIN]

i'm just waiting for the results, then i'm hitting the local u-pick

 

[Mallard]

That proves nothing. You need to compare a dual runners manifold to a single runner manifold. Not short runners vs long runners in a dual manifold.

No, not really, because one runner length is not optimal for every rpm. That's proven fact. Dual runner manifolds allow you to optimize for two rpm ranges so you can have a flatter curve. That dyno chart was to show you that dual runners do work on FI cars, since you claimed that one runner length is best. I don't have a copy of his pre-manifold dyno, but he switched to it because it gained power over the stock single runner piece.

 

[Alejo_NIN]

i'm confused now, you say dual-runners are better than single runner manifold...that kind amakes sense having different lenghts at different rpms...that's why mazda took and paid engineering time(which is not cheap) to design this manifold.

techincally people are paying ********** bout $600 for a single running mani....which people state is the same as the 626(no proof of this)

my question is, what makes the Street Unit $600 dollars manifold better than the 626 $45 dollars mani and the stock Dual-Runner enginneered by mazda specifically for our cars?