Ecu wired for vtec - D-series.org

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Old 01-21-2006, 10:18 PM   #1 (permalink)
 
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Default Ecu wired for vtec

Is it ok if i have my ecu hardwired so the vtec is always on its a d16z6 head ona d15b7 block would it be bad for it? I know my gas milage would be worse but any other bad problems?
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Old 01-22-2006, 09:31 AM   #2 (permalink)
whatthehell1051
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/\ LMAO vtec is when a lobe on the intake of a single cam is "activated" to bring in more air (power). you don't need vtec until you make less power with stock cam (go to a dyno to determin this). You will probably screw up your engine leaving it on. Vtec doesn't activate till your over 15 mph anyways.
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Old 01-23-2006, 08:04 PM   #3 (permalink)
snackz
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Quote:
Originally Posted by whatthehell1051
Vtec doesn't activate till your over 15 mph anyways.
i learn something new every day.
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Old 01-27-2006, 11:22 AM   #4 (permalink)
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duhhh.... he's not using the ecu to activate vtec...


anyways, to answer your question:

It's not recommended, cause at low rpm's the pins that lock the rocker arms onto the center lobes tend to not go in all the way, or just in on a few, causing sputtering and poor performance/mileage.... thats why there an oil pressure check.

I would say get an MSG RPM activated switch and set it for 5Krpm's or so... at the very least. That would atleast work for the mean time. if u do do this, make sure you dont float or keep the rom's right around the point of engagement... (if u hook up an led for a vtec light then you can see for yourself if it's happening...) cause it will not be good for the solenoid or the posts that lock the cam to engage and disengage rapidly.
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Old 01-27-2006, 07:31 PM   #5 (permalink)
 
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Some engages Vtec early to help spool up big turbos...
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Old 01-27-2006, 09:08 PM   #6 (permalink)
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Don't leave it on. What I did was save my money and get a p28 ecu. But, of course you want it now like I did. So instead of purchasing an RPM switch like MSD's I just got a little horn from kragen and wired that up. I also had a tach. This was just a cheap way to engage VTEC while I did what was right. Also note that with out the proper fuel curve, especially on a b7/z6 w/ highr comp., you'll lean and possibly detonate. Just my .02
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