EFI Intake tech

[TT350]

Got an Q for you motor guys I’m running 31/2 elbow
on a Victor jr intake that I converted to efi with a 75mm
Ford type throttle body this is a fairly common setup.
My Q is since the intake was engineered for a 4 barrel
carb wouldn’t it be better to set it up with a 4 barrel throttle
body and mount the elbow to that so the intake gets 4 columns
of air? It seams to me that the would straighten out the
air and distribute the air more evenly. Just a thought.

Chris

 

[QUICK STORM]

Re: EFI Intake tech

that sounds like you have a good idea. i would probably be better to just have the throttle body w/4 butterflies. unless you have a seperate throotle body for each cylinder you probably won't see that much of a difference. all the bmw M cars have seperate throttle bodies for each cylinder.

 

[THEMADTYPH00N]

Re: EFI Intake tech

Got an Q for you motor guys I’m running 31/2 elbow
on a Victor jr intake that I converted to efi with a 75mm
Ford type throttle body this is a fairly common setup.
My Q is since the intake was engineered for a 4 barrel
carb wouldn’t it be better to set it up with a 4 barrel throttle
body and mount the elbow to that so the intake gets 4 columns
of air? It seams to me that the would straighten out the
air and distribute the air more evenly. Just a thought.

Chris

I've been told that the air will hug the backside of the elbow. Sort of starving the front cylinders, although I've never seen any evidence to back it up. What your saying using a 4 barrel throttle body would seem to solve that problem. The only other thing I'll add is I see turbo Pro 5.0 car use a single throttle body and an elbow and they seem to have no problem with the setup.

 

[TT350]

Re: EFI Intake tech

They use this setup on there production cars?

that sounds like you have a good idea. i would probably be better to just have the throttle body w/4 butterflies. unless you have a seperate throotle body for each cylinder you probably won't see that much of a difference. all the bmw M cars have seperate throttle bodies for each cylinder.

 

[TT350]

Re: EFI Intake tech

I’ve seen this and your right they make it work.
But they have the best money can by EFI systems
so if they had a lean CYL they could isolate it
with it’s own fuel and spark tune up

I've been told that the air will hug the backside of the elbow. Sort of starving the front cylinders, although I've never seen any evidence to back it up. What your saying using a 4 barrel throttle body would seem to solve that problem. The only other thing I'll add is I see turbo Pro 5.0 car use a single throttle body and an elbow and they seem to have no problem with the setup.

I’m not a big Buick guy but I do read about them.
I’ve seen some after market upper plenums that
supposedly corrects flow problems like this.

 

[QUICK STORM]

Re: EFI Intake tech

They use this setup on there production cars?

yes sir

E46 M3 - 6 throttle bodies - a large manifold
E39 M5 - 8 throttle bodies - with 8 "air horns" in the intake manifold
E60 M5 - 10 throttle bodies - with 10 "air horns" in the intake manifold

lots of exotic cars use seperate throttle bodies

 

[TT350]

Re: EFI Intake tech

Old hillborn with an air box here I come!!

yes sir

E46 M3 - 6 throttle bodies - a large manifold
E39 M5 - 8 throttle bodies - with 8 "air horns" in the intake manifold
E60 M5 - 10 throttle bodies - with 10 "air horns" in the intake manifold

lots of exotic cars use seperate throttle bodies

 

[QUICK STORM]

Re: EFI Intake tech

Old hillborn with an air box here I come!!

:lol: huh

 

[BigAl...]

Re: EFI Intake tech

guys you're starting to split hairs here. John Gerber (who we all know is very fast) told me he was never able to get the plugs to look the same until he installed a carb intake with an elbow (daytona dash) "without changing anything else, the truck went x faster". the vehicles mentioned earlier (bmw) have seperate TB's but no common plenum below them, also those engines rev quite abit higher than any syty motor. Look closely and I doubt you'll find an exotic car that uses TB's and I bet ya they will all rev over 6500rpm.

In my humblest opinion, NO you would not benefit from a quad TB for overall power. I will say that you would probably improve off idle/part throttle torque because of the smaller/progressive TB.

just my .02 worth

BigAl...

 

[It's just a six]

Re: EFI Intake tech

Have you seen any mutiple throttle bodied engine run a turbo or supercharger?
For the most part it, if you/they have it, it is just for looks, there is not much of any power gain, just better driveability. Part throttle cruise off idle would be better. :2cents:

 

[TT350]

Re: EFI Intake tech

Muti TB’s is a bit extreme but the real Q is the
elbow and large single blade TB the best way
to do a carb manifold. Or would the 4 barrel
TB offer better results. I think that a progressive
4 TB would have better drivability.

 

[QUICK STORM]

Re: EFI Intake tech

yes, as stated above a quad butterfly would offer better driveability