D15b Vti Swap

Alright i have a question about my civic and a b15b... Now i have a 95' Civic DX and i want to get the D15b To put in it. So my question is is that do my axels and what not work stock with this motor and what not becuase i want to make sure its a direct bolt in. The only thing that i wuold need is the ECU becuase im ruuning and 1.5 Non- VTEC. So i was wondering if any one could help me on this to make sure my swap goes the wy i want it to go. Also is there any thing i have to do with the wireing and what not to make the harness fit and stuff. so ya if you could help me out that would be great!!

By the way this is the Vtec version of my motor thats all i really wanted from this swap and what not.

I'm confused here...

'95 DX's came with a D15b motor, NOT a B15b. There's no such thing as a B15 motor, just a D15. There is no VTEC version of a D15 that I know of, the motor you are after I believe is a D16Z6 or a D16Y8, the Z6 is the '92- '95 Si hatchback as well as the '92-'95 EX motor, and the Y8 is the '96-'00 EX motor, both of which have VTEC. Your current motor is the D15b7, correct?

Recheck your engine code on your current motor in your Civic, and we'll see what we can figure out from there.

You should just need the ECU and to run a few lines for Vtec. You should be able to use the stock axles, mounts, etc since it's all from a D-Series engine. Depending on what engine you had before you could use the stock tranny too (not CX or VX thought [I believe]).

There is no VTEC version of a D15 that I know of, the motor you are after I believe is a D16Z6 or a D16Y8, the Z6 is the '95 Si hatchback motor, and the Y8 is the '96-'00 EX motor, both of which have VTEC.
Yup there is a D15b with Vtec, it's pretty rare though. Came stock in Civic Vti's in Japan. But the really older ones (pre-'92) had carbs instead of fuel injection. I just found out about them a week ago when i saw it on http://www.hmotorsonline.com/shop/sc2000search.cgi?what=page&item=30019

Yup there is a D15b with Vtec, it's pretty rare though. Came stock in Civic Vti's in Japan. But the really older ones (pre-'92) had carbs instead of fuel injection. I just found out about them a week ago when i saw it on http://www.hmotorsonline.com/shop/sc2000search.cgi?what=page&item=30019

Ahh, thanks for the FYI on that. :cool: I went out on a limb and said "not that I know of" rather than "there isn't" just in case. ;) I really wasn't sure, but that makes sense. I also just read the topic of this states that his car might be a VTi model as well or at least using that engine. :o

ya Thats where i was going to get my motor from Hmotorsonline so ys when i saw that i was suprised y sel so do you think its even worth it i mean do you like its a good idea or should i just throw it away?

If you're feeling really cheap you can use just the longblock, as it will mount up to your tranny, and all the other ascessories in the bay. Then you only have to pin the vtec wires on the D15B's ECU, but you should get either a Si, or EX tranny to take full advantage of the D15B.

hey, not to hijack this thread or anything, but do any of you know about compatibility of this motor as far as pistons, rods, bearings, etc? Is it the same as the other d-series? I am thinking about going with this motor on another swap i'm doing...

hey, not to hijack this thread or anything, but do any of you know about compatibility of this motor as far as pistons, rods, bearings, etc? Is it the same as the other d-series? I am thinking about going with this motor on another swap i'm doing...

I just got my D15b a week ago. I'm still waiting for the P08 ecu. As far as the motor goes it is a 1.5l bottom end, so vx,cx bottom. The head is a Z6 head so you use all z6 head stuff. If you do some research there is plenty of info around. Any other questions just ask. If your just looking for Vtec then just swap on a z6/y8 head. All is interchangable because it is a d series motor.

[QUOTE=Dumped91Hatch]...As far as the motor goes it is a 1.5l bottom end, so vx,cx bottom. The head is a Z6 head...QUOTE]
Thank you so much you just saved me a lot more $$$ than I have to spend; i had no clue that's what the motor was.

ok guys let me help you out a bit.....I have had one of these engines for a while and have done quite abit of research. First off, everything in your engine is interchangable as long as your current engine is mpfi. all trannys 89 and up, not 88 because of spline differences, will fit. Use the P08 ecu but get it from hyperducktuning.com. I have one and I wouldn't chose any other ecu. The RPT chip works best. When you wire the vtec make sure you wire the oil switch behind it as well.....trust me. This engine thrives on lots of cold air and high RPMs. It can go to 8k stock without batting an eye. As for the internals, you are partially right, the top end is a z6 head, and you'll need a 92-95 VX timing belt when you install. The bottom end is similar to the d15z1, but the rods are bigger and so are the journals. As far as I know so far no one has been able to locate upgraded lower end parts except for the pistons. In my opinion you can't get a better bang for your buck and it's one of the toughest out there. I've ran about 15 bottles through it and seems to get stronger each time I drive it. Just be careful who you buy it from. If you pay more than 500 shipped your getting ripped off.........e-mail me if you have questions... [email protected]

hope this was some help!
later

Since it is a z6 head you use the z6 timing belt you could use the vx I suppose but it is vtec-e. Oh and it only revs to 7200 so your tach is off. Unless you use an ecu that has a higher redline. Here is a site on the Jdm D15b,http://asia.vtec.net/article/d15b/ most of it is accurate.

I must disagree. You are right, it is a d16z6 head however the bottom end is different then a d16z6. The bottom end is most similar to a d15z1 hence the reason you use a vx timing belt. As far as the rpms are concerned, I said that it can safely rev to 8k I didn't say that the stock p08 ecu would allow it to do so.

basically what I'm saying is that a z6 belt will not fit...

Then why do they say always use the year and head when purchasing the belt for a Mini Me swap Be it 1.5 or 1.6?

all I know is that a VX belt fit....so I assumed it was because the bottom end was most like a VX block...the d15z1

so ya i havent been on here for some time now. and im starting to learn so much about this motor as in the JBM d15b. so ya. i could really use some more input as in where i can get the parts for this type of motor i mean for the head the thing is im going to bore it out to a 1.6 and then im going to run a crap load of NOS on it and see what happens so if you have any ideas it would be cool if you could tell me

OK, here's the deal with the JDM D15B VTEC. It is basically the same head as the D16Z6 on a 1.5L block. It is meant to be a high-revving little engine, and is happy to spin at 8K rpm. It has a different rod/stroke ratio than the other D15's, so if you want to run a ton of N2O on it, your only real option for strengthening the rods is shot-peening or cryo treating. You can use any D-series piston with it, and you should have no problem getting it up to 1.6L.

When you do the swap, the only thing you'll have to worry about is using the oil pressure sensor off your stock block and putting it in the new block (the hole is there, just plugged up) and figuring out how to run VTEC.

If you want one of these motors, and depending on where you live, I can get you the engine for as low as $510 shipped, and can get the pistons and cryo/shot-peening done too, if you want. It would be up to you to crack open the motor and remove the pistons/rods, unless you want to pay double shipping. I have installed several of this motor, and really like the way it drives. It has plenty of guts and pulls the 4g civics/crx's nicely. Email me at [email protected] if you have more questions, or hit me up on MSN messenger, my username is [email protected].

all trannys 89 and up, not 88 because of spline differences, will fit.

So let me get this straight, my 1988 Honda CRX transmission WILL NOT fit the JDM D15B??? Can anyone confirm this? I'm buying this motor in Feb or Mar and need as much info. as possible.

The 88's have a different number of splines on the input shaft to the trans, but if you use the 88 flywheel and clutch, along with the 88 hubs/knuckles, you should have no problems. You may be able to do a search for it on here, but I'm pretty sure that's the situation. The trans should work fine, since all of the D-series motors should line right up. You just have to stick to the 88 clutch/flywheel/trans combo. I'll try to find more info on that...

You don't necessarily have to use the 88 axles and hubs. I'm runing an 88 dx tranny with 91 std original axles and hubs. You just have to use the imput shafts that the axle slide into from the year axles you have.

i have a d15b but its but its not running right. i swapped it into a 96 hatch which is obd-2 with ex ecu. the problem is thers no vtec and it cuts off at 6k and sucking alot of gas. can someone help me please

Did you put on the obd2 oil pump? The obd2 motors have a crank angle sensor on the oil pump, and it won't run right if that's not connected, also, are you using the obd2 injectors and dist? Those could throw things off as well. I would suspect that your problems are obd-related.

Maybe you should use the ECU that originally ran the motor...and I think the D15B is obd1.

Yes, you would need to either convert your car and ecu over to obd1 to match the motor, or convert the motor over to obd2 to match the car. It should run right either way, but you'll have to make sure it is entirely swapped to the obd level you desire. Also, you need to use the obd2 injectors out of your original motor, if you are keeping obd2. If you left in the injectors that came in the d15b when you put in the motor, you'll have problems. You should also be using the right obd level of distributor.