Throttle tension? - ZR-1 Net Registry Forums

Bolling · 03-02-2015

I can tell when accelerating that there are two different tensions when accelerating. The first part of the throttle is very easy and then gets a little stiffer. Is this normal and is it the secondary's kicking in?

XfireZ51 · 03-02-2015

The throttle is progressive in that only the small butterfly operates the motor for idle and part throttle mainly, then the secondary throttles plates open (throttle body)

Bolling · 03-02-2015

Quote:

Originally Posted by XfireZ51

The throttle is progressive in that only the small butterfly operates the motor for idle and part throttle mainly, then the secondary throttles plates open (throttle body)

Thanks, that makes sense.

Billy Mild · 03-02-2015

Glad I'm not the only one who thought that.

Paul Workman · 03-02-2015

Dom is of course correct. But, just to clarify, don't confuse the pressure to open the main TB ports with the Secondary Port Throttles which are located in the Injector Housing and controlled electrically: you will feel no change in foot pressure when opening the SPTs.

Bolling · 03-05-2015

Quote:

Originally Posted by Paul Workman

Dom is of course correct. But, just to clarify, don't confuse the pressure to open the main TB ports with the Secondary Port Throttles which are located in the Injector Housing and controlled electrically: you will feel no change in foot pressure when opening the SPTs.

Thanks

03-02-2015	#1
Bolling Join Date: Jan 2015 Location: Illinois Posts: 83	Throttle tension? I can tell when accelerating that there are two different tensions when accelerating. The first part of the throttle is very easy and then gets a little stiffer. Is this normal and is it the secondary's kicking in?

03-02-2015	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,660	Re: Throttle tension? The throttle is progressive in that only the small butterfly operates the motor for idle and part throttle mainly, then the secondary throttles plates open (throttle body) __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

03-02-2015	#4
Billy Mild Join Date: Aug 2014 Location: Kansas City, MO Posts: 838	Re: Throttle tension? Glad I'm not the only one who thought that. __________________ Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration

03-02-2015	#5
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: Throttle tension? Dom is of course correct. But, just to clarify, don't confuse the pressure to open the main TB ports with the Secondary Port Throttles which are located in the Injector Housing and controlled electrically: *you will feel no change in foot pressure when opening the SPTs.* __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry