Honda intake manifold
#522
I've been following this thread with great interest.
Two questions--my assumption is that a turbo intake and a NA intake would be different. Generally speaking, longer and smaller I.D. intake runners for NA, and a larger (150%) plenum for a turbo setup.
As for a 68-70mm throttle, Skunk2 just came out with something close. This makes sense to free up a potential bottleneck, although the throttle might become a "light switch" or bog down WOT if too big.
Right?
Two questions--my assumption is that a turbo intake and a NA intake would be different. Generally speaking, longer and smaller I.D. intake runners for NA, and a larger (150%) plenum for a turbo setup.
As for a 68-70mm throttle, Skunk2 just came out with something close. This makes sense to free up a potential bottleneck, although the throttle might become a "light switch" or bog down WOT if too big.
Right?
#523
Sorry if already mentioned, but Skunk2 just released a 64mm TB for the Miata to address the "broken TB screw getting sucked into your intake at high RPM problem". See Good-win:
Miata Performance Parts : Miata 64mm Pro Series Throttle Body : 1999-2005
Miata Performance Parts : Miata 64mm Pro Series Throttle Body : 1999-2005
#524
Sorry if already mentioned, but Skunk2 just released a 64mm TB for the Miata to address the "broken TB screw getting sucked into your intake at high RPM problem". See Good-win:
Miata Performance Parts : Miata 64mm Pro Series Throttle Body : 1999-2005
Miata Performance Parts : Miata 64mm Pro Series Throttle Body : 1999-2005
#528
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I dont think most of you need 70+mm throttles. I cant tell you how many Hondas Ive seen running 72mm throttles because they think its cool, and the cars drive like ----, are hard to tune, and make less power than they would wityh a smaller throttle. Im not talking about stock bottom end turbo setups, Im talking about built B-series with big turbos.
The OEM 62mm Honda TBs are not a restriction until around 400hp and the 68mm is not a restriction for almost anybody.
The OEM 62mm Honda TBs are not a restriction until around 400hp and the 68mm is not a restriction for almost anybody.
#529
And if you want to figure out what size TB is even realistic. http://dairally.net/daihard/chas/Mis...aiThrottle.htm
#530
And if you want to figure out what size TB is even realistic. Throttle Body Calculator
#533
What was your near equal velocity number? The first size it give back. Its really hard to loose low end power by going big with the tb until it becomes way bigger than the intake piping. But you start to loose throttle control where you basically start making the same power as wide open throttle with the throttle not open all the way.
#534
What was your near equal velocity number? The first size it give back. Its really hard to loose low end power by going big with the tb until it becomes way bigger than the intake piping. But you start to loose throttle control where you basically start making the same power as wide open throttle with the throttle not open all the way.
#537
I've made tb's before but only barrel style, they're great for 30mm tb but once you start getting over like 45mm ish the external dimensions skyrocket. I was designing a 75mm one and once it got to be like 5" x 6" x 4" for external dimensions I stoped, and at that point it still wasnt going to seal very well for idle. but a 30mm can easily be made from a 2.5" cube.