...
...
...

I love the pro flo....

Let me just get that out there. But what effectiveness does it have over a superam. I love the looks of a pro flo but isn't it just a slightly better version of the lt1 intake? It looks a little bigger. But im looking for
Does someone have flow numbers of both?
Then there's at the same time... I love the torque of my 85 z51.. I'm sure its been a similar question asked before. It would make more sense for the superam to be more efficient at low rpms. All im saying is I promised myself at 80k miles. Id build my 434 and it's about time.(regardless it will out-torque the l98) It just needs to be driveable. (On a ex t5)

 

Wouldnt use either one of those on a 434 too small

Go single plane

 

http://www.vetteweb.com/tech/vemp_10...e/viewall.html



http://www.thirdgen.org/techboard/po...545-post9.html

 

Ive got a Team G sitting here ...Fits under a stock C4 hood with a Holley .

 

Good God - Without a doubt ditch both of those options and use a good single plane intake with an elbow.

I have no idea why people are so hung up on NOT using the most proven intake manifold availiable.

I spent the time and $$$ to convert my 92 LTX to a single plane.... WELL WORTH IT.



You L98/GEN I guys have it easy and cheap compared to me.

Edelbrock PN 29785....

http://www.jegs.com/i/Edelbrock/350/29785/10002/-1

Edelbrock PN 3630 fule rail kit.

http://www.jegs.com/i/Edelbrock/350/...oductId=753787

Sheetmetal TB elbow sources.

http://www.860performance.com/catalo...47&section=128

http://6061.com/

Make up a few -6 AN fuel lines and your rolling with the best intake out there.
Will

 

I am convinced.
Single plane didn't even cross my mind cause I think of carberators when I think single plane.
Your the best for posting the links!
the only problem. Isn't that intake a little out of my rpm range? Im not going to be racing this car. Just big driveable power.

 

Pretty interesting... the tunnel ram is very proven.. the holley stealth ram is based off this intake..

http://www.carcraft.com/techarticles...olds_contrast/

 

Super Victor # 2 .... is a sick intake , only one i would use on a 434 .. It was worth 15hp over a fully ported super victor 2925 .. I made close to 700hp with a set of AFR 235 on Pump gas with that intake .

 

 

PS

The pro flow XT is designed off the tunnel ram as well.. I would not snub them if they had a reasonable price.
The car craft article above. states, single intake's are CLOSE to the power of a tunnel ram.

 

As per my link above ,the pro flow can't be ported to larger head size typically used on perf 400ci + engines
It is well documented the Hp gains when going from a log style intake (HSR / MR ) to a SP intake on large cube engines

 

Number one that artical is a Dodge.

Number two the Pro Flow and Stealth ram are no where near the same as a carburated tunnel ram.

In a carburated application a tunnel ram works best because of air and fuel distribution with the 2 carbs being situated directly above the intake runners..... You loose all that in an EFI application when you stuff a TB off of one end of the plenum.
Will

 

That RPM range does not apply to an engine of your cubic inches... Not to mention all they did is copy the application range of the Victor E which that intake casting is based off of....

That intake on a 434 would start making power about 2500-3000RPM.

My little 383 LTX has over 400RWTQ at 3800RPM and my intake is a Super Victor PN 2925 which is bigger than the Victor E....

red L98 has a good idea with using a Super Victor II PN 2892 on big SBC engines but you would have to have it converted to EFI which is alot of welding and it's too tall to put an elbow on and still clear the stock hood....

The Victor EFI is a pretty much bolt on deal already converted from Edelbrock and while it's not perfect for every application, IMO it is a better choice than your other bolt on options in the same price range.
Will

 

Two TB's on a dual 4 top w / HSR ?
http://www.summitracing.com/parts/wnd-1913/overview/

 

That would work great and even one of the drag week guys has that set up on his car.... but how's it gonna fit under the hood of a C4??

The 4bbl TB works really good... actually better than an elbow that GM style dual TB but once you put an air cleaner or elbow for one on top of it... also won't under the stock hood....

You have a couple options on TB's and elbows with a single plane.... The sheetmetal ones like I have can be made for Stock GM dual TB or LSX TB and Edelbrock makes a low profile cast one for LSX TB that will fit under the stock hood.

Accel made a cast elbow for stock GM dual TB that you can still occasionally find on the used market.
Will

 

Clearing the stock hood is a problem ... 434 is a nice motor , but if the plan is to use a 23* head , i would just built a 406-421 CI . That 4" stroke needs alot of CSA and CFM to be efficient .

 

Seriously?? Its irrelevant what brand motor!!! the intake was in the article. Cube, HP, flow & rpm. The fact is the tunnel ram makes more HP
LoL your saying efi looses all this flow from the plenum.. yet your 90*
elbow carb conversion. & angled down to clear the vette hood.. would not lose more flow??? Then a straight. Efi Plenum.
The stealth ram.. is very close to the tunnel ram.. but around 2 inches shorter..

Its also a know fact a single intake sacrifices low end power.. to make optimum high rpm power.. 1/4 or less.. single is not going to be the best design.. salt flat or autobahn single is hands down the best option..

 

What are you thoughts on a single 4bbl TB on a HSR? http://www.summitracing.com/parts/wnd-1932

Worth the trouble to overcome the limitations of a front mount TB? ( Talking 383+ ,7K ,strip only setup )

If I ever get the $$ to advance from my 383 it ill be hanging out the hood for all to see

 

That plenum on the proflow too small and the runner csa also puny for the 434.. those sizes motors can use a whoooole bunch of air real easy.

Single planes of today are not the soggy manifolds people think they are or might have been in the 70s..all in the combination.

Find a way to make one of the two listed above....cut bondo hack whatever it takes. If you use too small an intake that "fits" but the car doesnt run whats the use

 

Unfortunatly it really does matter what kind of engine it is....

You don't even have a clue what a W2 SB Mopar is or what they are capable of. Those heads SUCK, they would have benifited much more from big intake manifold than a SBC. The SB Mopar also has a different stroke and rod length that the SBC - so signal in the intake tract is way different.... The intake runners are longer and the heads have 18* valve angle stock.... That Mopar engine is not relevent to any 23* SBC except in very big generalities.

Single plane intakes do not sacrifice anything worth keeping down low compared to a log style intake with a huge plenum. That is even more important when your talking about a big cubic inch engine that will have no problem making TQ at low revs because of the long stroke.

Even with an elbow air distribution is far superior in a single plane because all 8 intake ports feed off a central plenum that is tall and narrow. All 8 ports are connected at equal distances.....

Log style intakes have well known air distribution problems with the front 4 cyls being fat. 2 runners paired on each side seperated by a long wall back to the rear pair of ports.... Thats a great idea when the airflow is being direct linear because someone hung the TB off the front of the plenum right next to the front ports....

I'll point out again my little 383 goes over 400RWTQ at 3800RPM... at 3000RPM is has over 350RWTQ.... Thats with a big cam and what most of you here consider big heads for a street car... it dosen't sign off until over 7000RPM and nearly 500RWHP comes at 68000RPM.... It pulls like a tractor whenever you put your foot in it and power never signs off.

That is a reason the baddest LTX's in the country all run converted single plane intakes. Serious LTX guys spend tons of time and $$$ to build something GENI guys can buy off the shelf. While GENI guys seem to by pass it to buy a slightly impoved version of what we have stock.

I'm not saying a log style intake won't run well... I AM saying a single plane intake will blow the doors off it in this application.

It dosen't matter.... I'll never convice those of you that know everything but don't really know anything. It dosen't matter how fast my car is or how many engines I build and I even document on this forum that show people here results they would never be able to duplicate on their own....

Too many Car Craft, Hot Rod, PHR articals out there pushing whatever intake or Comp Cam the advertisers wanted to sell more of that month.... Somehow thinly veiled bought and paid for advertising intended to sell parts is better tech than real results.

That said I'll put my $$$ where my mounth is anytime. My 92 is availiable to compare Single Plane v/s Stealth Ram/Pro Flow whenever needed.
Will