Helix Throttle body spacer

nhproxr · June 22, 2004

Just wondering if anyone has tried one of these and if they work. Seems as though it may considering there is only air going through throttle body so it doen nothing for fuel atomization.

masomatic · June 24, 2004

When I was doing research on different mods, I called GMS and asked them about their MAF sensor and compatability with other products. The tech I spoke with made a suggestion not to use a helical type TB Spacer because the vortex of the air can interfer with the MAF readings. Essentially, the vortex does not stay at the TB spacer. It can travel back through the tube. Now I do not know if was a biased opinion, but it is understandable that it can happen.

airdeano · June 30, 2004

from my experience the TBS with or without a pattern in the bore will not affect

the MAF, because of a votex disturbance at the MAF level.

reasoning is:

as air passes the throttle body, the velocity into the intake, past the throttle blade

the air is straight.. straight as an arrow. as the air enters the TBS, the tumble, or

vortex, or swirl happens.

so this MAF disturbance is possibly caused by something else...

airdeano

nhproxr · July 5, 2004

so airdeano, are you saying the thing may actually work, or just that it won't screw up the MAF sensor? I already have this thing should I just throw it in and see what it does, many have said it doesn't work. How about some real testimony does it work or not???

snoman · July 5, 2004

When I was doing research on different mods, I called GMS and asked them about their MAF sensor and compatability with other products. The tech I spoke with made a suggestion not to use a helical type TB Spacer because the vortex of the air can interfer with the MAF readings. Essentially, the vortex does not stay at the TB spacer. It can travel back through the tube. Now I do not know if was a biased opinion, but it is understandable that it can happen.

Well the whole purpose of the "vortex" is to better mix the fuel and vaporize in better in the air. I would question it effecting the MAP or MAF though because things a pretty turbulant in there to begin with. .

airdeano · July 9, 2004

actually snoman, the GM "VORTEC" was designed in better flow characteristics

for cylinder filling. accomplished by offsetting the intake valve centerline to the

intake port (.136"). also a higher floor and raising the intake port angle.

this promotion increased the flow rate by: (info from a magazine article)

8% on a 1.84" intake valve over a non-vortec similar port volume

12% on a 1.94" intake valve over a non-vortec similar port volume

6% on a 2.00" intake valve over the 1.94" valve non-vortec head

8% on a 2.02" intake valve over the 1.94" valve non-vortec head

with port injection the higher fuel pressure is the atomazation. on TBI the extra

turbulance yes did increase the atomazation.

its always a quest for more air into the combustion chamber.....

airdeano

snoman · July 9, 2004

actually snoman, the GM "VORTEC" was designed in better flow characteristics
for cylinder filling. accomplished by offsetting the intake valve centerline to the

intake port (.136"). also a higher floor and raising the intake port angle.

this promotion increased the flow rate by: (info from a magazine article)

8% on a 1.84" intake valve over a non-vortec similar port volume

12% on a 1.94" intake valve over a non-vortec similar port volume

6% on a 2.00" intake valve over the 1.94" valve non-vortec head

8% on a 2.02" intake valve over the 1.94" valve non-vortec head

with port injection the higher fuel pressure is the atomazation. on TBI the extra

turbulance yes did increase the atomazation.

its always a quest for more air into the combustion chamber.....

airdeano

No kidding huh? I know that it a new head design and how it is designed but we were talking about a helix space upstream of it on manifold and its effect, not head design here.