secondarries

[tf95ZR1]

re thinking

[XfireZ51]

tf,

The fact is elimination of secondaries usually accompanies other mods like top end port etc. So I think Graham's graph shows that there is an appreciable increase in low end torque w just primaries activated up through 4k when you eliminate other changes. Beyond that, not sure we have enough data. Perhaps gb does.

[tf95ZR1]

Thanks xf.
But we aren't really "eliminating" the secondaries, just adding them to the primaries throughout the RPM range. So the total possible airflow (volume) at low RPM increases, but I guess Mr. Behan's point is that the airflow dynamics and characteristics change in an unfavorable manner. There must be a solution.........

[Blue Flame Restorations]

eliminating the mechanical operation

[XfireZ51]

Originally Posted by Blue Flame Restorations

eliminating the mechanical operation

Thx Brett.

[tf95ZR1]

Originally Posted by Blue Flame Restorations

eliminating the mechanical operation

Didn't somebody try electronic activation with servos? Scott F?

[Pete]

1: That can be fixed in the tune.

2: From the torque #'s this a 368ci ?

I've seen a lot of tuners programs none had any low rpm tuning.

[Pete]

Originally Posted by tf95ZR1

Didn't somebody try electronic activation with servos? Scott F?

Ted the argument is if one takes secondaries completely out of the car it won't drive nice in traffic and then it's only a race car.

Pete

[Dynomite]

Originally Posted by Pete

Ted the argument is if one takes secondaries completely out of the car it won't drive nice in traffic and then it's only a race car.

Pete

My 91' ZR-1 is both.....it drives nice in traffic and is a race car (with Pete's cams and Marc's chip) and porting (plenum, IH, Heads) and Jerry's gaskets and SW off road headers/exhaust and 87 octane or 91 octane fuel and power key always on and no secondaries and Ron Davis Radiator with Marc's 180 deg thermostat engine runs cool ALL the time with TB coolant blocked off and and and.....

Defective Stant Thermostats by Marc Haibeck

And and and.....cruise control works fine in answere to the question that started this thread

Originally Posted by janozr1

Hi to all ,
Im going to eliminate secondarries with Haibeck prom - got vacuum
headache with this necessary system....everything will go out
Will cruise control - after that still be working?
Thanks fo reply.
Jano

[RHanselman]

Originally Posted by Pete

2: From the torque #'s this a 368ci ?

Pete,

I was able to get 450 rwtq from my stock block 350. Just a little top-end porting (excluding heads) with the secondaries remaining. Wasn't really that hard