SOHC VTEC Crossover...
04-02-2002, 09:27 PM
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SOHC VTEC Crossover...
Was driving my car (D16Z6 w/ auto) up a hill and I noticed that around 4800 rpm the engine sounds like (i'm guessing) VTEC is crossingover, but I thought it crossed at a higher rpm. Does anyone happen to know exactly when it crosses over? By the way it's a 93 Del Sol Si with everything stock except the cam, if it helps.
04-02-2002, 09:28 PM
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Re: SOHC VTEC Crossover... (D16_VTEC)
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I think about 5500 RPMs. Maybe 58.
I think about 5500 RPMs. Maybe 58.
04-02-2002, 09:34 PM
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Re: SOHC VTEC Crossover... (HondasRfast)
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I think about 5500 RPMs. Maybe 58.
I think about 5500 RPMs. Maybe 58.
anyway......around that area......i dont know exactly i havent really watched my tach until it crossed.
note to self: will check that tomorrow.....
04-02-2002, 09:35 PM
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Re: SOHC VTEC Crossover... (HondasRfast)
So does anyone know why I'm hearing something at 4800 and not 5500/5800? I'm not driving with my A/C on and I'm not giving it more gas at 4800...what could it be? Is there anyway to test VTEC?
04-02-2002, 09:45 PM
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Re: SOHC VTEC Crossover... (D16_VTEC)
Could having the timing advanced/retarded have anything to so with this? The only reason I ask is because sometimes when I have my timing advanced, the engine is cold, and I'm nailing it, it doesn't want to change gears (auto) until I let off the gas a little.
04-02-2002, 09:51 PM
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Re: SOHC VTEC Crossover... (D16_VTEC)
On the 93 D16's (D16Z6) I think the VTEC comes on at 4800 rpm. But mine a D16Y8 it sounds like it goes into VTEC at 5500 rpm and it's impossible for me to keep it in VTEC when shifting hard. But if someone knows for sure correct me...
And anytime an auto engine is cold it will have trouble changing gears.
[Modified by CdnSI, 6:53 AM 4/3/2002]
And anytime an auto engine is cold it will have trouble changing gears.
[Modified by CdnSI, 6:53 AM 4/3/2002]
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04-02-2002, 10:11 PM
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Re: SOHC VTEC Crossover... (D16_VTEC)
Here, found this site. Scroll down to where it says VTEC.
http://www.angelfire.com/ca/DrOhm/hybrid.html
http://www.angelfire.com/ca/DrOhm/hybrid.html
04-03-2002, 12:50 AM
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Re: SOHC VTEC Crossover... (C1V1C)
Um well I don't have any upgrades as far as my exhaust system goes so I'm not getting all the power I could be getting. But not to say there is no improvement. At the track my time went from a crappy 18.1 to a still-slow 17.2 and as far as top end goes, well it has a better power curve and alot more torque. I used to not be able to break 100 in over-drive (auto), but now it has no problem getting to 120.
04-03-2002, 08:02 AM
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Re: SOHC VTEC Crossover... (Mista Bone)
I dissagree...my VTEC indicator comes on at 4800 no matter what's happening. I used to think it depended on engine load and things like that but it's always the same.
04-03-2002, 11:53 AM
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Re: SOHC VTEC Crossover... (wizzards581)
My God this subject has been covered so many times. The reason most can never decide on when the VTEC engages is because with our SOHC engines, its hardly noticed.
I know for a fact that the later model EX's(d16y8) have the crossover at 4800. Anything before that, I have no clue.
I know for a fact that the later model EX's(d16y8) have the crossover at 4800. Anything before that, I have no clue.
04-03-2002, 12:30 PM
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Re: SOHC VTEC Crossover... (maxim)
Ok this page: http://members.aol.com/josh3030/specifications.html clears the air a little showing the GSR and Type-R OEM VTEC points.
This one I found: http://users.twave.net/civicsi/technica.htm shows the B16A2 in the 99-00 Si and the 96-00EX VTEC. I have a hard time believing it, but it says it is 4500rpm for the D16Y8. Hmmmm.........
This one I found: http://users.twave.net/civicsi/technica.htm shows the B16A2 in the 99-00 Si and the 96-00EX VTEC. I have a hard time believing it, but it says it is 4500rpm for the D16Y8. Hmmmm.........
04-03-2002, 01:43 PM
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Re: SOHC VTEC Crossover... (97CivicFerio)
Ok this page: http://members.aol.com/josh3030/specifications.html clears the air a little showing the GSR and Type-R OEM VTEC points.
This one I found: http://users.twave.net/civicsi/technica.htm shows the B16A2 in the 99-00 Si and the 96-00EX VTEC. I have a hard time believing it, but it says it is 4500rpm for the D16Y8. Hmmmm.........
This one I found: http://users.twave.net/civicsi/technica.htm shows the B16A2 in the 99-00 Si and the 96-00EX VTEC. I have a hard time believing it, but it says it is 4500rpm for the D16Y8. Hmmmm.........
[Modified by maxim, 4:43 PM 4/3/2002]
04-03-2002, 02:00 PM
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Re: SOHC VTEC Crossover... (maxim)
i have a '93 EX and ima have to go wtih VTEC being engaged at 4800 to 5200 depending on throttle position, u forget people that it engages off of oil pressure. your engine must be at normal operating temp (if it's cold, won't turn on), and make sure u have ENOUGH oil for pressure to build up so it crosses over
just a lil advise
just a lil advise
04-03-2002, 08:35 PM
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Re: SOHC VTEC Crossover... (maxim)
maxim, the turbo is not quite on yet so I have been adjusting it from 4500-5500 to see what I like best. I do plan to have it set about 1500rpm higher than the point I reach max boost. I guesstimate that to be around 5000rpms, maybe less. From what I understand from MatT3T4, as long as VTEC comes on after max boost the motor will be happy. BTW, what do you have your VTEC set to right now?