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dr.fowler · 06-22-2006, 10:46 AM

Hey all, I'm helping a friend figure out his swap, and I'm not sure on some of his questions. He has a 98 EX, ordered a single cam vtec replacement and got a dual stage vtec d15b. I know about swapping over the crank angle sensor and the oil pressure sensor, but I'm not sure about getting the vtec to work. Is there a way to make just the hi-lift vtec work, or does he need a p08 ecu to have any vtec? Also, isn't the P08 ecu obd1? Is there a direct plug in ECU that will run that system on OBD2? I searched but didn't find anything real helpful, so if you know of another thread, links would be great help!!

dznutz157 · 05-23-2007, 12:49 PM

im in the exact same boat only with a 96 ex and a 98 d15b vtec... i believe you can simply wire up the one vtec solenoid and leave the vtec E one disconnected

killercannible · 05-23-2007, 09:23 PM

not connecting one of the vtec solenoids won't hurt anything. Hook up the vtec solenoid, not the vtec-e, and run a p2e obd2 ecu.

dznutz157 · 05-23-2007, 09:24 PM

i have the p2p ecu... should still work

killercannible · 05-24-2007, 12:50 PM

I think i meant the p2p, whatever one comes stock on the obd2a civic ex's.

93civicracer · 05-28-2007, 05:45 PM

Yea you might want to lose the vtec e, from what I've gathered, it's only for fuel economy and slows you down some.

93civicracer · 05-28-2007, 10:07 PM

I think that's kind of a pointless swap unless there's something wrong with the y8. Aren't the y8 and d15b both sohc vtec that produce about the same power?

whudupfoo · 05-29-2007, 08:28 AM

i just did the exact same swap in my 97 EX, i hooked up the green and yellow wire, is that the right one? also my motor wont idle steady. it jumps between one and two... does anyone know why? i noticed that there is a place to hook up a map sensor on the d15b intake manifold but i put my y8 throttle body on it. was that a mistake? the throttle body that came on the manifold was stuck and i couldnt fix it. would i be better off putting the whole y8 manfold on my d15?

06-22-2006, 10:46 AM	#1
dr.fowler Junior Member Join Date: Jun 2006 Age: 34 Posts: 1 iTrader: 0 / 0% Rep Power: 0	Helping a friend with D16Y8 to D15B swap Hey all, I'm helping a friend figure out his swap, and I'm not sure on some of his questions. He has a 98 EX, ordered a single cam vtec replacement and got a dual stage vtec d15b. I know about swapping over the crank angle sensor and the oil pressure sensor, but I'm not sure about getting the vtec to work. Is there a way to make just the hi-lift vtec work, or does he need a p08 ecu to have any vtec? Also, isn't the P08 ecu obd1? Is there a direct plug in ECU that will run that system on OBD2? I searched but didn't find anything real helpful, so if you know of another thread, links would be great help!!

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05-23-2007, 12:49 PM	#2
dznutz157 Junior Member Join Date: May 2007 Posts: 6 iTrader: 0 / 0% Rep Power: 0	im in the exact same boat only with a 96 ex and a 98 d15b vtec... i believe you can simply wire up the one vtec solenoid and leave the vtec E one disconnected

05-23-2007, 09:23 PM	#3
killercannible Senior Member Join Date: Jul 2005 Posts: 629 iTrader: 0 / 0% Rep Power: 17	not connecting one of the vtec solenoids won't hurt anything. Hook up the vtec solenoid, not the vtec-e, and run a p2e obd2 ecu.

05-23-2007, 09:24 PM	#4
dznutz157 Junior Member Join Date: May 2007 Posts: 6 iTrader: 0 / 0% Rep Power: 0	i have the p2p ecu... should still work

05-24-2007, 12:50 PM	#5
killercannible Senior Member Join Date: Jul 2005 Posts: 629 iTrader: 0 / 0% Rep Power: 17	I think i meant the p2p, whatever one comes stock on the obd2a civic ex's.

05-28-2007, 05:45 PM	#6
93civicracer Lick my nuts. Join Date: Apr 2007 Location: Texas Age: 19 Posts: 2,097 iTrader: 0 / 0% Ride: '90 Accord DX, '93 Civic JDM D15B Rep Power: 32	Yea you might want to lose the vtec e, from what I've gathered, it's only for fuel economy and slows you down some.

05-28-2007, 10:07 PM	#7
93civicracer Lick my nuts. Join Date: Apr 2007 Location: Texas Age: 19 Posts: 2,097 iTrader: 0 / 0% Ride: '90 Accord DX, '93 Civic JDM D15B Rep Power: 32	I think that's kind of a pointless swap unless there's something wrong with the y8. Aren't the y8 and d15b both sohc vtec that produce about the same power?

05-29-2007, 08:28 AM	#8
whudupfoo JDM EK Join Date: May 2007 Location: Olympia, WA Posts: 17 iTrader: 0 / 0% Ride: 97 civic with a jdm 3 stage Vtec D15B Rep Power: 6	i just did the exact same swap in my 97 EX, i hooked up the green and yellow wire, is that the right one? also my motor wont idle steady. it jumps between one and two... does anyone know why? i noticed that there is a place to hook up a map sensor on the d15b intake manifold but i put my y8 throttle body on it. was that a mistake? the throttle body that came on the manifold was stuck and i couldnt fix it. would i be better off putting the whole y8 manfold on my d15?

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Helping a friend with D16Y8 to D15B swap