"Pinning" the secondaries open. - ZR-1 Net Registry Forums

robbz28 · 11-05-2012

I have found mixed replies to this question on the internet but nothing as direct as I would like. I had a vaccum leak and it was causing my secondaries to only open some of the time. So I pulled my plenum, did some checking and managed to get the leak down to a manageable amount, but I went ahead and used a tie strap and tied the actuators open on both sides. (My car has the LPE 530 kit on it where it is in "full" mode at all times) I figured what would it hurt, what's the difference in this and removing the guts completely. Anyone else done this? Any adverse effects? Been running my car like this for about 500 miles and no issues yet.
One more question, anyone ever run any 100 octane low-lead aviation fuel?

GOLDCYLON · 11-05-2012

I believe Dominic has pinned back his butterflies. XfireZ51

mike100 · 11-05-2012

100LL used to be a cheap way to get some octane to run nitrous on an 11:1 street-strip carbed muscle car I had, but if you still have catalysts, look out, it will quickly break the substrate up into rattling chunks.

robbz28 · 11-05-2012

Quote:

Originally Posted by mike100

100LL used to be a cheap way to get some octane to run nitrous on an 11:1 street-strip carbed muscle car I had, but if you still have catalysts, look out, it will quickly break the substrate up into rattling chunks.

I'm not 100% certain on the cats, I think they are there, but one tank probably wouldn't hurt. My car has 12:1...but it runs good on 93, just wondering if there would be a noticable difference with the 100.

Kevin · 11-05-2012

Quote:

Originally Posted by mike100

100LL used to be a cheap way to get some octane to run nitrous on an 11:1 street-strip carbed muscle car I had, but if you still have catalysts, look out, it will quickly break the substrate up into rattling chunks.

i knew the 02 sensors would have a problem but gas + flame fixes tat

XfireZ51 · 11-05-2012

Was your calibration modified to run 2 injectors all the time? By opening the secondaries permanently, air is moving through the secondary runner as well. I suspect there some loss of velocity thru the primary runner but primary injector is spraying fuel only into one air stream while secondary air is getting into chamber without any fuel. You're getting enough fuel but not an even mixture IMO.

XfireZ51 · 11-05-2012

Quote:

Originally Posted by GOLDCYLON

I believe Dominic has pinned back his butterflies. XfireZ51

I did originally and modded the cal. Now they are completely out.

GOLDCYLON · 11-05-2012

Quote:

Originally Posted by XfireZ51

I did originally and modded the cal. Now they are completely out.

Good man

robbz28 · 11-05-2012

Quote:

Originally Posted by XfireZ51

Was your calibration modified to run 2 injectors all the time? By opening the secondaries permanently, air is moving through the secondary runner as well. I suspect there some loss of velocity thru the primary runner but primary injector is spraying fuel only into one air stream while secondary air is getting into chamber without any fuel. You're getting enough fuel but not an even mixture IMO.

Dont know...i will call LPE and find out tomorrow...makes sense with my hesitation.

PhillipsLT5 · 11-05-2012

You should be able to buy 100 unlead race gas, it will be pricey, $6 to 8 per gallon
This should help
http://www.osbornauto.com/blend.htm

11-05-2012	#1
robbz28 Join Date: Aug 2012 Location: Louisiana Posts: 74	"Pinning" the secondaries open. I have found mixed replies to this question on the internet but nothing as direct as I would like. I had a vaccum leak and it was causing my secondaries to only open some of the time. So I pulled my plenum, did some checking and managed to get the leak down to a manageable amount, but I went ahead and used a tie strap and tied the actuators open on both sides. (My car has the LPE 530 kit on it where it is in "full" mode at all times) I figured what would it hurt, what's the difference in this and removing the guts completely. Anyone else done this? Any adverse effects? Been running my car like this for about 500 miles and no issues yet. One more question, anyone ever run any 100 octane low-lead aviation fuel? __________________ [SIGPIC][/SIGPIC] 1991 ZR1 #144 421 rwhp 392 rwt 2012 Toyota Tundra Crewmax 4x4 5.7 liter 1967 Ford Mustang resto-mod coupe 289 (Sold)

11-05-2012	#2
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: "Pinning" the secondaries open. I believe Dominic has pinned back his butterflies. XfireZ51 __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 11-05-2012 at 02:39 PM.

11-05-2012	#3
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: "Pinning" the secondaries open. 100LL used to be a cheap way to get some octane to run nitrous on an 11:1 street-strip carbed muscle car I had, but if you still have catalysts, look out, it will quickly break the substrate up into rattling chunks.

11-05-2012	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,666	Re: "Pinning" the secondaries open. Was your calibration modified to run 2 injectors all the time? By opening the secondaries permanently, air is moving through the secondary runner as well. I suspect there some loss of velocity thru the primary runner but primary injector is spraying fuel only into one air stream while secondary air is getting into chamber without any fuel. You're getting enough fuel but not an even mixture IMO. __________________ [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

11-05-2012	#10
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,450	Re: "Pinning" the secondaries open. You should be able to buy 100 unlead race gas, it will be pricey, $6 to 8 per gallon This should help http://www.osbornauto.com/blend.htm