JEEZ. i just read this ENTIRE thread only to find out you've been lazy?! Haha I'm just messin. Awsome intake by the way. That throttle body is so cool. Is it completely cut out behind the butterfly, or are there just two larger holes?

 

Yep it is completely cut out behind the butterfly

 

Big plenums with short runners.... I take it you've tried the noticeably longer runner in combination with the larger plenums without success? Or, are you able to merely state that they like the larger plenums?

 

i have tried both and what i found was that longer runners with large plenums work great for n/a applications, but each one has to be tuned specifically for the engine it is being built for..... and under boost the difference between the 2 runner lengths is almost un-noticable, some larger runners can actually be restrictive on boosted applications...plenums can also be restrictive like in the ltx intake castings, i got a 24rwhp at 11psi increase in modifing the upper plenum and smoothing out the runners alone...thats why i said the lt1/4's under boost love the larger plenum with the shorter runners...

 

Thank's for the followup post. I believe I'll go ahead with the longer runnered intake. As long as it doesn't adversely affect [under boost] operation, I figure it couldn't hurt, while engine is running, prior to turbos being spooled.

 

how would you go about calculating proper intake runner lenght for a particular application (blown & na), mathematics wise.
-b

 

Scientific Design of Exhaust & Intake Systems

That would be the best place to start. It was first published in 1962 but all the same things apply.

Bret

 

... did a search and didnt find any new postings about results just like to hear an update

 

Well i don't mind putting it (and the whole new top end that's going on along with the intake) on a stock bottom end really, if it had lower milage or i had a beater. But mine has 116k miles and i don't have a beater right now... so i ordered a 355 from AP a few weeks ago, so i'm just waiting on that.

 

Are you using the stock plastic lines to feed the motor? How did you adapt them to AN fittings? Or are you using a stock style regulator with the snap on connectors and using the adapter you can get from Pure Performance?

Dave

 

Yes stock plastic lines, into these-
http://www.technologyorgasm.com/upload/fittings.JPG
from Jim Miller at TubeTech, 479-394-6466 It's the only place i could ever find that makes something like those.

 

Thanks, just what I was looking for.

 

So have there been any results posted yet with this intake? Im curious to see what kind of power it makes on a 355. Did Bret also do the heads, or just a cam to work more with this intake rather than a ported factory casting.



Nick

 

No results yet. I'm not sure what your question is at the end... but no Bret didn't do the heads, Blackstone did. And yes Bret designed my entire valvetrain.

 

Hey Kmook, I guess my question in general is what kind of results did you get. I will be very interested to know once you get the setup running and tuned. Sounds like a killer combination, with the heads done by Blackstone, and the valvetrain set up by Bret, this set up should make some of the bigger cube motors raise an eyebrow or two Looks like from the pics Bret used a tunnel ram base and modified it from there. With the intake powderedcoated black its kinda hard to see any details, or at least ones that would give away more about its construction.


Nick