I don't know is if a larger plenum vol would help. At some point a "large" plenum volume is also a negative impact on performance -- and again I don't know if the elbows are "too big".

As I recall the 5.0 fords had 17" of runner and a very small common plenum for maximum torque. Going FI or extremely high hp, high torque builds most often required a swith to a log style manifold with 3.5 inch runners and a larger plenum (by necessity), but that manifold was doggish on anything else.

Gonna see if I can get the expert to chime in

 

damn yall got my brain working numbers again late at night

i havent went to bed before 4am yet this week lol

 

lol Everytime I go lay down I start thinking about the turbos coming from STS... I won't sleep for a week.

 

First off. Great work here Kano. Somehow I can hear the GM engineers and their yada, yada, yada response.............. no suprises there.
Very well layed out theory here. Some high end data acquisition will prove this into fact. Slowly we're all discovering the shortcomings of the stock truck intakes and so far our only hope is the Vic. Jr.. While these intakes may soften bottom end power especially on the smaller engines, a higher stall converter will fix that. After all the Vic. Jr. is designed for upper rpm hp and should only be used in those applications.
The 90mm adapter should help the DBW trucks and now I've stubled upon an alternative solution for the cable trucks. See here.

Keep up the great work guys. I really appreciate everyone input and effort.

Richard

 

Great info Kano! This is something i've always thought about but have just been too lazy to put it to paper.

But there is one little slip up I caught. On the illustration you have the firing order numbered 1-8-4-3-5-6-7-2 and it should be 1-8-4-3-6-5-7-2.

Not that those 2 being swaped would affect much on intake characteristics though.

 

thanks everyone


TurboGibbs... oops I pulled that off the web somewhere but
thanks for the correction

Richard,
thanks for chiming in
You seem to be the only sponsor thinking about this and taking steps to make things happen.
Im sure I speak on alot of peoples behalf when I say thanks

 

ill toss a thought about the vic jr setup with an elbow....

think about how the air will flow through the elbow......

the elbow is going to not functional like you might think...the air flow will be distributed more to the rear cylinders than the front...its the natural air flow route....

where as if you use the EFI Carb setup, you would be getting all downward air flow, distributing more evenly to all 8 cylinders

this came from a discussion i had saturday at summit with a guy from edlebrock who claimed to help develop the vic jr with the EFI Card....

i think it makes sense...

 

Like this you mean?

 

oh ****!!!! thats nice....got any more pics??

but dudeman from edelbrock was talking more on the lines of a fuel injected carb...but there is more to that mod

he did tell me though that they are going to be getting more into truck perforance, and i asked why...

He says that you can buy a truck cheap, and make a nice lil hot rod out it!!

 

this is the one I want