For high boost application i.e 40psi, which intake manifold can handle the pressure, no crack and can increase significant hp number?
SMIM - like JMF,beyond redline, Magnus.
Cast IM - like Magnus, hawver
HP wise i think SMIM + pricing has made the highest HP gain , and it went to hypertune , from the test that buschur racing did :D , bt then again , HKS kansai gained more hp than the hypertune did , just a little , bt the price of HKS is much much higher than hypertune, thts the reason ppl vote hypertune as the current top notch on the shelf mani for evo/dsm
reliability wise , hands down to hks kansai , hawver , magnus , forester racing , greddy , etc
hawver even gurantees for nitrous defacts etc :D
flow tests , hehe, wht i have learned, bigger is not always better
lets look at the test below
frm the test above we can see, bigger intake doesnt mean more flow
venom has a bigger capacity, but jmf race(not drag) has smaller cc but more flow.
lot things can be seen in the two test flows above , the on shelf JMF Drag version has proven 8 seconds on Jake Montgomery's 4g63 car, of cos the bigger players all use customized manifold and not on the shelf ones
lastly, buschurs full tests on the manifolds
http://www.buschurforums.com/forum/showthread.php?t=20866
magnus manifold test and reply to buschur lol , *war*
http://www.magnusmotorsports.com/intakemanifolds/intaketest.htm
buschur racing and magnus had a big war on the intake manifolds for the evos
buschur racing and all the other peformance shops claimed lost of power
bt magnus gave their reasons that they have newer intake designs
all the other shops donated manifolds for the testings , bt magnus never sent one
there is where the war started :D , hehehehe
if ur looking for big players ,
brent rau's intake is fully customized , same goes to kiggly ,
only one that runs on shelf mani is jake with JMF drag version
