Secondary Port Function - ZR-1 Net Registry Forums

preshenne · 02-24-2024

Have a 95 ZR-1. Am trying to understand if Secondary system is working correctly. I assume the valet key must be "on". Is there a way to tell the ports are actually working? Kick in the pants going thru 3K RPM? Or?

WARP TEN · 02-25-2024

I would suggest a look at Marc Haibeck's website at ZR1specialist.com. Here is an article directly addressing your issue; there may be more. Good luck. --Bob

http://www.zr1specialist.com/HAT%20W...%20Working.pdf

preshenne · 02-25-2024

WARP TEN - Thanks for the info and link. Excellent read. Great reference. I have some driving to do!! Thanks again

Z51JEFF · 02-25-2024

Haibeck sells a PLENUM PULL DVD that will show you how to actuate the secondary system while you look for any issues. It's best to have this DVD handy when doing a plenum pull,before the plenum goes back on it's possible to activate the system and watch all of the components working. The electric vacuum pump makes this possible.

zyal8r · 02-25-2024

Hi @preshenne... I have watched the video of your car from BaT many many times, and it sure sounds to me like the secondaries were very functional at the time that video was taken for the auction. Does it feel sluggish above 3k RPM? Mine comes alive between 3-4k RPM, and I've learned to hold on! Couple times I have forgotten to turn my key on, and the difference is pretty obvious... it falls on its face at 4k RPM if the key is not on.

Mike

preshenne · 02-26-2024

Quote:

Originally Posted by Z51JEFF

Haibeck sells a PLENUM PULL DVD that will show you how to actuate the secondary system while you look for any issues. It's best to have this DVD handy when doing a plenum pull,before the plenum goes back on it's possible to activate the system and watch all of the components working. The electric vacuum pump makes this possible.

Thanks for the DVD tip. Thats great.

preshenne · 02-26-2024

Quote:

Originally Posted by zyal8r

Hi @preshenne... I have watched the video of your car from BaT many many times, and it sure sounds to me like the secondaries were very functional at the time that video was taken for the auction. Does it feel sluggish above 3k RPM? Mine comes alive between 3-4k RPM, and I've learned to hold on! Couple times I have forgotten to turn my key on, and the difference is pretty obvious... it falls on its face at 4k RPM if the key is not on.

Mike

Thanks for the video reminder. And it still sounds like that. Not sluggish as far as I can tell.

Young1 · 02-28-2024

If it hits 6,500 plus rpm in first and second gears they are working.

02-24-2024	#1
preshenne Join Date: Jul 2022 Location: Hilton Head Island, SC Posts: 12	Secondary Port Function Have a 95 ZR-1. Am trying to understand if Secondary system is working correctly. I assume the valet key must be "on". Is there a way to tell the ports are actually working? Kick in the pants going thru 3K RPM? Or?

02-25-2024	#2
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,087	Re: Secondary Port Function I would suggest a look at Marc Haibeck's website at ZR1specialist.com. Here is an article directly addressing your issue; there may be more. Good luck. --Bob http://www.zr1specialist.com/HAT%20W...%20Working.pdf __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"

02-25-2024	#3
preshenne Join Date: Jul 2022 Location: Hilton Head Island, SC Posts: 12	Re: Secondary Port Function WARP TEN - Thanks for the info and link. Excellent read. Great reference. I have some driving to do!! Thanks again

02-25-2024	#4
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,074	Re: Secondary Port Function Haibeck sells a PLENUM PULL DVD that will show you how to actuate the secondary system while you look for any issues. It's best to have this DVD handy when doing a plenum pull,before the plenum goes back on it's possible to activate the system and watch all of the components working. The electric vacuum pump makes this possible.

02-25-2024	#5
zyal8r Join Date: Oct 2019 Location: Raymore, MO Posts: 135	Re: Secondary Port Function Hi @preshenne... I have watched the video of your car from BaT many many times, and it sure sounds to me like the secondaries were very functional at the time that video was taken for the auction. Does it feel sluggish above 3k RPM? Mine comes alive between 3-4k RPM, and I've learned to hold on! Couple times I have forgotten to turn my key on, and the difference is pretty obvious... it falls on its face at 4k RPM if the key is not on. Mike __________________ 1995 ZR-1 #004 - Yellow/Black 1996 LT4 #3828 - Yellow/Beige/LT4/Z51 - 1 of 4

02-28-2024	#8
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 895	Re: Secondary Port Function If it hits 6,500 plus rpm in first and second gears they are working. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.