D15b Jdm Vs D16y7 Usdm
#1
D15b Jdm Vs D16y7 Usdm
Hey ppl,
I am in the midst of an engine swap. Earlier i had planned to drop a stock USDM D16y7 into my 99 Civic ( as it was equipped with the same engine) but recently afta speaking to some ppl i have opted to go with the JDM D15B for it. I have started working on the swap already
I was told by mechanics that the swap is straight forwards and i only have to grab out the intake manifold, exhaust manifold and the crank sensor from my present D16Y7 in the car and put it on to this D15B and i should be all set to go..
Any of you guys have any comments? i was told that the same stock ecu will work for it and i dont have to change anything
Please comment
Thx
I am in the midst of an engine swap. Earlier i had planned to drop a stock USDM D16y7 into my 99 Civic ( as it was equipped with the same engine) but recently afta speaking to some ppl i have opted to go with the JDM D15B for it. I have started working on the swap already
I was told by mechanics that the swap is straight forwards and i only have to grab out the intake manifold, exhaust manifold and the crank sensor from my present D16Y7 in the car and put it on to this D15B and i should be all set to go..
Any of you guys have any comments? i was told that the same stock ecu will work for it and i dont have to change anything
Please comment
Thx
#2
the stock ecu will work.. but i wouldnt recommend it. It won't run at its best.. your only option would to be to get an obd1 p28 and a conversion harness.. it is pretty much straight forward but the one thing i have seen guys new to swaps miss is that the hose that runs from your fuel cansister to your evap (on your y7 motor) will now run to a nipple just above the throttle body. besides that everything is pretty much straight forward. You can also use your stock exhaust system if you please.. you will have to relocate your cat if you use the d15's header.
#3
Is it true that JDM D15B's are sleeper VTEC ? i got that from this article :
http://asia.vtec.net/article/d15b/
it says:
"In the flesh, the 3-stage VTEC D15B is a sleeper. The valve cover does not have any 'VTEC' wording and only the sharp eyed will recognize the engine as VTEC by noting the VTEC switches (yes, two of them) located on top of the intake runners and the high 7200rpm red-line of the tach."
And do u knw if any1 is selling the ECU u r talking abt chris ? how much r they available for with the harness ?
http://asia.vtec.net/article/d15b/
it says:
"In the flesh, the 3-stage VTEC D15B is a sleeper. The valve cover does not have any 'VTEC' wording and only the sharp eyed will recognize the engine as VTEC by noting the VTEC switches (yes, two of them) located on top of the intake runners and the high 7200rpm red-line of the tach."
And do u knw if any1 is selling the ECU u r talking abt chris ? how much r they available for with the harness ?
#4
harness is about 100-150$
p28s go for 100-200$ (depends if they are chipped or not)
I'm not sure if it says vtec on the valve cover, I know all USDM obd1 vtec valve covers say "vtec" on them.. not sure about jdm. And don't get suckered by thinking the jdm d15 "stage 3 vtec" is such a great swap. It's pretty much the same as a z6 or y8 swap. But it's def. a nice little upgrade from a y7 motor
p28s go for 100-200$ (depends if they are chipped or not)
I'm not sure if it says vtec on the valve cover, I know all USDM obd1 vtec valve covers say "vtec" on them.. not sure about jdm. And don't get suckered by thinking the jdm d15 "stage 3 vtec" is such a great swap. It's pretty much the same as a z6 or y8 swap. But it's def. a nice little upgrade from a y7 motor
#11
Originally posted by atif7x7
Is it true that JDM D15B's are sleeper VTEC ? i got that from this article :
http://asia.vtec.net/article/d15b/
it says:
"In the flesh, the 3-stage VTEC D15B is a sleeper. The valve cover does not have any 'VTEC' wording and only the sharp eyed will recognize the engine as VTEC by noting the VTEC switches (yes, two of them) located on top of the intake runners and the high 7200rpm red-line of the tach."
Is it true that JDM D15B's are sleeper VTEC ? i got that from this article :
http://asia.vtec.net/article/d15b/
it says:
"In the flesh, the 3-stage VTEC D15B is a sleeper. The valve cover does not have any 'VTEC' wording and only the sharp eyed will recognize the engine as VTEC by noting the VTEC switches (yes, two of them) located on top of the intake runners and the high 7200rpm red-line of the tach."
however what is your goal with this motor, you going for economy or a bit more kick...the jdm d15 is a lot more fun to drive around in versus a d16
your stock ecu wont work because you dont have a vtec motor, like what was said earlier go with the p28 and convert to OBD1 OR even better is get the actual JDM P08 computer to get that motor running its best...dont forget to run your vtec wires
an even easier swap would be to put a b16a2 in your car..bolt in (when you get all the parts) and all you have to do is run 2 wires for vtec.
#12
Only the obd2 d15b have the 3 stage vtec, no other engine does and it is not the same as the z6 or y8 stage 1 runs 3 cylinders, stage 2 makes it go to 4 cylinder and the 3rd is stage is actually vtec (this engine is a combination of vtec-e and vtec). The obd1 d15b however is pretty comparable to a z6 or y8, it does say vtec on the valvecover. As for the swap, you will have to wire up the vtec as your y7 was not equipped with it and you will also need an ecu with vtec. Find out which d15b you are getting obd1 or obd2, go from there.
#14
Extracted from another site:
"Looking at Stage 1 above, we see that both intake valve rockers operate independently. And at this low RPM, only one intake valve opens and closes since the other intake valve follows an almost-round cam profile. The almost-round cam profile is designed to open the valve just tall enough to avoid pooling of fuel above the valve. This mechanism is just like the low-RPM operation of the VTEC-E mechanism, resulting in great low-RPM fuel economy.
Stage 2 in the illustration shows the mid-RPM range operation. Starting at about 2500 RPM, the first oil pressure is applied, pusing a pin to lock the two intake valve rocker arms together. Both valves now follow the same low RPM cam profile in their operation. Thus far the operation has just been like a normal VTEC-E mechanism.
In Stage 2 above, the second oil pressure is applied at about 4500 RPM. The second oil pressure pushes another pin through the valve rocker arms and a cam follower that is between the two valve rocker arms. The cam follower operates from the high RPM cam lobe so now both intake valves follow the high RPM cam profile. This is like the high RPM section of an SOHC VTEC engine.
As seen from the power curve graph, each of the three stages has a distinct curve. And by choosing the switch-over points correctly, the optimal portions for the three stages can be combined into one curve. This level of low and high RPM optimization is unavailable from any other mass produced commercial engine.
It seems that combination of VTEC technologies is where the future lies for Honda engines. Already we are seeing this in mass produced US-spec Hondas: the J30A1 V6 used in Honda Accord V6s has a hybrid VTEC-E and SOHC VTEC system, though not a three-stage system like above. In this system, Stage 2 is not implemented. Only Stage 1 and Stage 3 are used: one intake valves open at low RPM, both intake valves open taller and for longer duration at high RPM."
Enjoy.
"Looking at Stage 1 above, we see that both intake valve rockers operate independently. And at this low RPM, only one intake valve opens and closes since the other intake valve follows an almost-round cam profile. The almost-round cam profile is designed to open the valve just tall enough to avoid pooling of fuel above the valve. This mechanism is just like the low-RPM operation of the VTEC-E mechanism, resulting in great low-RPM fuel economy.
Stage 2 in the illustration shows the mid-RPM range operation. Starting at about 2500 RPM, the first oil pressure is applied, pusing a pin to lock the two intake valve rocker arms together. Both valves now follow the same low RPM cam profile in their operation. Thus far the operation has just been like a normal VTEC-E mechanism.
In Stage 2 above, the second oil pressure is applied at about 4500 RPM. The second oil pressure pushes another pin through the valve rocker arms and a cam follower that is between the two valve rocker arms. The cam follower operates from the high RPM cam lobe so now both intake valves follow the high RPM cam profile. This is like the high RPM section of an SOHC VTEC engine.
As seen from the power curve graph, each of the three stages has a distinct curve. And by choosing the switch-over points correctly, the optimal portions for the three stages can be combined into one curve. This level of low and high RPM optimization is unavailable from any other mass produced commercial engine.
It seems that combination of VTEC technologies is where the future lies for Honda engines. Already we are seeing this in mass produced US-spec Hondas: the J30A1 V6 used in Honda Accord V6s has a hybrid VTEC-E and SOHC VTEC system, though not a three-stage system like above. In this system, Stage 2 is not implemented. Only Stage 1 and Stage 3 are used: one intake valves open at low RPM, both intake valves open taller and for longer duration at high RPM."
Enjoy.
#15
Originally posted by ELusive
1st stage=3 cyl, 2nd stage=4 cyl, and 3rd stage=actual vtec?? I've never heard of this before.
1st stage=3 cyl, 2nd stage=4 cyl, and 3rd stage=actual vtec?? I've never heard of this before.
#17
I got the 3stage vtec...the ecu for this motor is very rare (P2J),if your getting the manual one but i wouldnt recommend the tranny that comes with it. The cam in this motor is the same as a Zex cam. Now if you want fuel economy but also a bit of speed...this should be good enough till you get that B-series or K-series for the mean while. Im using the y8 tranny on this motor and the p2p ecu and i also switched the 2vtec solenoids to the one from the y8 and intake manifold cause i dont got the right ecu, so you will feel the vtec crossover at 5500rpm big time but anything before that it doesnt move. Lol from a full tank of gas, i get 630km-670km the most on 89octane.
#18
Originally posted by Blougheed
I Have a 99 coupe DX with the Y7 in it
i bought a D15B JDM motor, i have to ODB1 ECU and conversion harness.......can i keep the D15B intake cause the Y7 sucks *****?
I Have a 99 coupe DX with the Y7 in it
i bought a D15B JDM motor, i have to ODB1 ECU and conversion harness.......can i keep the D15B intake cause the Y7 sucks *****?
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