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#11 | |
![]() Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Sent from my SM-G950U using ZR-1 Net Registry mobile app |
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#12 | |
![]() Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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I then match the lowest primary with the highest secondary for a cylinder pair. I continue this sequence until I have the highest primary with the lowest secondary injector. I then assign the highest combined flow rate pairs to #8 & #7, working my way forward to #2 & #1 which will have the lowest combined flow rate. I also had them flowed at 50 psi vs. 43 psi. Obviously you can't use injectors that are way off! My experience so far delivers nice fuel balance across the cylinders with optimal combined flow when secondaries are kicked in (or when running on engines with secondaries deleted). Bank to bank fueling seems to be closer as well (read BLM left and right) provided your O2's are good.20201102_055510.jpg20201102_060041.jpg Sent from my SM-G950U using ZR-1 Net Registry mobile app Last edited by jss06c6; 11-02-2020 at 07:22 AM. |
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#13 | |
![]() Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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The Denso 20 heat range is about the same as the NGK 6 and the old ACD 1 heat range. It's a good choice for LT5s with two exceptions: 1) it's too cold if the car is a show car which seldom sees aggressive driving and does experience frequent starts-without-warm-up and/or short trips. If that's the duty cycle, I'd use the IT16TT and 2) it's too hot for serious track use. For that you need the Denso 22 heat range and unfortunately there is no Denso IT22TT. If you're NGKm you need the 7 heat range. When I owned Barney, I ran Denso IT22s (iridium tip) all the time and never had a problem other than more rapid errosion of the side electrode on the half of the cylinders which had negative polarity. I just changed those four plugs more often. Lastly, someone said earlier that iridium plugs "run hotter". Please, post some facts which support that statement.
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
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#14 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Hib, As you can see from the quote, I stated I had read that equivalent iridiums ran a bit hotter. I interpreted that as having a hotter spark.
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[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 |
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#15 |
![]() Join Date: Mar 2007
Location: Sweden
Posts: 28
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Be aware of counterfeit NGK and Denso spark plugs when shopping on the internet. Try google fake spark plugs. Use an authorized dealer so you know what you getting.
Used FR1LS 035 and now Ngk bkr7e-11 044. Never logged to compare but runs fine with both and my driving style. Thomas Last edited by Rodder; 11-04-2020 at 07:55 AM. |
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#16 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Have u looked to see how they are burning?
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[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 |
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#17 |
![]() Join Date: Mar 2007
Location: Sweden
Posts: 28
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I can get a pic. I have a joint problem that put me offside now and then, like now, but I get to it.
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#18 |
![]() Join Date: Feb 2012
Location: Ledyard,CT
Posts: 8,122
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#19 |
Join Date: May 2013
Location: Chicago
Posts: 978
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Another vote for AC/Delco 41-602.
I swapped mine earlier this year and gapped new plugs at .050. and the car seems to like it even better than the .035 gap. Can't beat the price and they are good for 10k miles.
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1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black *Sold* 1985 L98 Blue On Blue *Sold* |
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#20 | |
![]() Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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A plug that is a hotter heat range does seldom means it makes a "hotter" spark. Iridium tipped plugs in a given heat range do not run "hotter" than a non-iridium plug of the same heat range.
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
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