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| Let's get Technical! Discussion for hardcore in-depth motor heads! |
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06-05-2004, 03:21 PM
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#1 | |
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AF Newbie
Join Date: May 2004
Location: Pittsburgh, Pennsylvania
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what is dual vtec engagement?
I found an ecu for my jdm gsr motor that i'm building to go in to my 99 civic ex and the ecu is a chiped ecu by mugen it says, it lists that it has dual vtec engagement at 4600rpm and 5800rpm. What does that mean i know vtec engagement in the 5k rpm range is good but whats does it mean when it lists it has dual engagement at those rpm levels? thanks
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06-06-2004, 02:16 AM
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#2 | |
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AF Enthusiast
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im not certain, but i think it has to do with throttle %. like if youre over a set %, then itll engage at 4600, and if youre under that % then itll engage higher.
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06-06-2004, 01:16 PM
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#3 | |
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AF Enthusiast
Join Date: Apr 2004
Location: Newark, Delaware
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Re: what is dual vtec engagement?
I think it has to do with the GSR Intake Manifold w/ has dual runners (believe on is long...the other short) and hey switch inbetween RPM for better performance. You can amost hear the manifold click if you have ever driven a GSR w/ a stock Intake Manifold
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1996 GSR w/ 1995 OBD-1 B18C1, Hondata S200 w/ P61 ECU, LS Tranny w/ Quaife LSD,ClutchMstr Stg 5,T/4 AR .60 w/ HKS Wastegate,RC 660 cc Injectors,Had Throttlebody,Skunk2 Intake Manifold,Eagle Sleeves,JE Pistons, Carrillo Rods,Stock Head & Internals,Thermal 3" Exhaust w/ no Cat,AEM Fuel Rail-Riser-UEGO-Cam Gears-Pullies-Fuel Filter,255 Fuel Pump,MSD 6A,GReddy Front Mount, 2-12's, 3 Amps,MB QuartComponents,Type-R Lip & 00 Head & Tailights, 2000 Integra Type R: Totaled 
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06-06-2004, 05:10 PM
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#4 | |
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06-06-2004, 07:22 PM
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#5 | |
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i have dualrunners as well... when the butterflies open, that is not the first stage of vtec. but it is possible to have dual stage vtec. a friend of mine programmed it into his wifes gsr... and i was in the car while she was driving. depending on if she was cruising or at wot, it would determine what point vtec engaged. might not be a normal feature in ecu's, but it can be programmed in.
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