Gain 100HP with an intake manifold change?? - Cross post from Ferrari Chat
#436
Captain Obvious
Super User
Super User
Those hose clamps on that SHO intake are and exact fit and look (motorcycle style) of the OE early 32V clamps except they are stainless steel. Have a set in my '85 that I pulled of a car at the local junkyard years ago. Ford sells them to but they are around $10ea.
#438
Official Bay Area Patriot
Fuse 24 Assassin
Rennlist Member
Fuse 24 Assassin
Rennlist Member
I neglect to understand how adding something more complex to an intake manifold would be even better than what Porsche has done originally. We are trying to get gains from simplifying the manifold, not make it more complex.
#439
Rennlist Member
by the way... what is the throttle body diameter of the S4? what is it on the S3?
#440
Captain Obvious
Super User
Super User
I thought you were trying to get gain regardless of complexity. Now not only that it must be cheap but also must be simple too? Some design criteria you two have.
#441
Official Bay Area Patriot
Fuse 24 Assassin
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Fuse 24 Assassin
Rennlist Member
Incorporating butterflies to 'stage' the intake is complex in my book. Why did Ford and Yamaha do it? To even out the torque curve in a similar way?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
#442
Rennlist Member
Incorporating butterflies to 'stage' the intake is complex in my book. Why did Ford and Yamaha do it? To even out the torque curve in a similar way?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
#443
Captain Obvious
Super User
Super User
I'm gong to take an educated guess that besides you (aka we), not many are interested in peak power gains but rather want mid range power increase. A street driven car will benefit alot more from a mid range improvement that near redline.
#444
Rainman
Rennlist Member
Rennlist Member
Incorporating butterflies to 'stage' the intake is complex in my book. Why did Ford and Yamaha do it? To even out the torque curve in a similar way?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
ford didnt have variable cam timing on that engine.
and the LS has all the torque you'd ever need due to the displacement, along with fantastic heads, so they don't need intake witchcraft.
#446
Rennlist Member
Plus, with cars like ours and engines that sound like ours, they are meant to be driven from 4500rpm to 6500rpm. thats how they are designed. the the mid range performance thing is part throttle , lazy passing or hill climbing without having to downshift. boring stuff. we are talking performance here! (we, meaning, not you)
#447
Rennlist Member
I saw some dyno tests for the 6.4 liter that used the 80mm throttle body and extruded honed intake, and there were little or no gains. this just proved to me that the intake is junk!!!! if a 75mmm throttle body isnt restrictive on a 5 liter, then that intake HAS to go!!
#448
Rennlist Member
Incorporating butterflies to 'stage' the intake is complex in my book. Why did Ford and Yamaha do it? To even out the torque curve in a similar way?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
Intakes like the LS and that Aston Martin engine do not have any tuning flaps in them (at least the LS does not. I need to see the Aston Martin one again). Those 'simple' intakes yield some pretty good gains. So, why the heck not then?
#449
Addict
Lifetime Rennlist
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Lifetime Rennlist
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We, . who drives seriously like that?
Plus, with cars like ours and engines that sound like ours, they are meant to be driven from 4500rpm to 6500rpm. thats how they are designed. the the mid range performance thing is part throttle , lazy passing or hill climbing without having to downshift. boring stuff. we are talking performance here! ......
Plus, with cars like ours and engines that sound like ours, they are meant to be driven from 4500rpm to 6500rpm. thats how they are designed. the the mid range performance thing is part throttle , lazy passing or hill climbing without having to downshift. boring stuff. we are talking performance here! ......
And the reason why Porsche ended up using a "big" V-8 was so they did not have to spin the engine, getting away from the distracting noise and fury of the little air-cooled flat six.....all by design not an accident or mistake.
There is no reason why an S-4 intake SHOULD work on a stroker engine which does not make it "garbage" simply not what they WANTED.
I get it, you want a race intake but given how few people are racing 928s that is a very limited market.....
You might look into lost foam epoxy molding as a technique to fabricate one off manifolds.....pretty sure that is how the Threshy intakes were formed. If you can shape Styrofoam into the passages you want you then cover it with plastic wrapping tape as mold release protectant and lay epoxy over it, S glass is heat tolerant and far cheaper than carbon fiber......once it sets you pour lacquer thinner into it to dissolve the foam.
It really is that simple Especially with the Salsbury Plenum.
#450
Three Wheelin'
DIY manifolds and the ultimate plenum, the Flowmaster---
R&D doesn't have to be costly.
http://blog.modernperformance.com/27
R&D doesn't have to be costly.
http://blog.modernperformance.com/27