I have a 1990 CRX HF and I want to drop a motor in. Id rather have the LS engine for the extra power...but I have the opportunity to get be a D15B SOHC VTEC as well. I can only get the engine with the LS deal and EVERYTHING I need for the D15B off of totaljdm.com . My dilemma is: I REALLY WANT THE LS engine but im afraid ill have to do ALOT of work just to make the damned thing fit. Any helpful info would be....helpful.

 

90 CRX HF.. I'd go d15b unless the LS is a b18b (out of 94+). b18a1 I feel just isn't worth the extra weight. I KNOW I HAVE ONE in my 91 CRX SI.

Try searching around. Neither drop is a plug and play both require wiring modification.

 

Both have potential. Both are good platforms to start out with. If you want stock power than the LS would be better. It has more torque and plenty of pickup power. It also has an advantage, cause it reacts better with mods. The D15 is good, cause it has Vtec. If you were to build the motor, the Vtec will help you out in the long run. You can only get so much power out of the little 1.5 though.
If you are afraid of work...I wouldn't recommend the LS. It isn't hard, but it will take some time and a little bit more money. Both will require some kind of work though. Your 90 CRX HF will need mounts, axles, linkage, ecu, engine and tranny for the LS. Depending on what year LS...you will have to get it run the same year electronics(OBD). If you run the D15BVtec you will also need to get the CRX to run the different OBD and the Vtec. So both will require some sort of work and time.
If it was up to me, I'd go with the LS, but it's up to you and what you want out of it.

-Lor

 

d15b is not that bad
lightweight, good top end, the vtec makes it worth it
just put a fresh jdm d15b in my 95 civic sedan. it pulls good for a 1.5 especially after i put my i/h/e on. once it hits around 4500 rpms its great
however,if your looking for torque go ls

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboimports &raquo;</TD></TR><TR><TD CLASS="quote">Both have potential. Both are good platforms to start out with. If you want stock power than the LS would be better. It has more torque and plenty of pickup power. It also has an advantage, cause it reacts better with mods. The D15 is good, cause it has Vtec. If you were to build the motor, the Vtec will help you out in the long run. You can only get so much power out of the little 1.5 though.
If you are afraid of work...I wouldn't recommend the LS. It isn't hard, but it will take some time and a little bit more money. Both will require some kind of work though. Your 90 CRX HF will need mounts, axles, linkage, ecu, engine and tranny for the LS. Depending on what year LS...you will have to get it run the same year electronics(OBD). If you run the D15BVtec you will also need to get the CRX to run the different OBD and the Vtec. So both will require some sort of work and time.
If it was up to me, I'd go with the LS, but it's up to you and what you want out of it.

-Lor</TD></TR></TABLE>

Hey whats up LOR I've been freakin busy. My apologize..

Anyways. The LS is not that difficult to drop in. You already have MPFI all you have to do is repin. You will need axles, shift linkage, ecu, you'll need to notch the frame (driver side) where the alternator sits. Thats about it. Its not that difficult at all. The Vacuum lines aren't to difficult either... except in Lors case.... yes the b18 has some good torque but I just don't think it moves that well.

Put it this way I have a 91 CRX SI with a b18a1 with a S1 tranny.
I have a 98 Civic EX d16y8 with s80 tranny on it.

I feel the EX would tear up my CRX. Now if I swapped in a b18b long block (which I am planning on) and then put a cable tranny on that. I feel that would move pretty good.

It doesn't matter which OBD (on-board-diagnostics) you go with. It matters how much work you want to do.

Only thing I am not positive is d15b isn't that obd1? If so not sure if you can convert it to obd0 or not. More wiring that will need to be done plus the vtec wiring you will have to add plus the repinning you will need to do.

The b18a1 or b18b can be your choice obdo-1(2 even if you wanted to do a hell of a lot of wiring).. The b18 all you will need to do is lengthen some wiring, repin a little, notch that frame, get the proper parts and you are set.

If you want to do less work go with the b18.

If you want something that will move I'd recommend the d15b or d16z6.

Just my stupid opinon

 

the main thing you have to worry about is if you have the money to do an ls swap, if you do then you should do it over the d15b swap. keep in mind that there are alot of little things that are going to increase the cost of the swap that you might not think about when you initiate your swap. on the other hand the d15b swap is essentially plug and play there isnt much to it but you wont have the performance potential that the ls has.

just reasearch some more and determine which of the two better fits what you are looking for

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboimports &raquo;</TD></TR><TR><TD CLASS="quote">Both have potential. Both are good platforms to start out with. If you want stock power than the LS would be better. It has more torque and plenty of pickup power. It also has an advantage, cause it reacts better with mods. The D15 is good, cause it has Vtec. If you were to build the motor, the Vtec will help you out in the long run. You can only get so much power out of the little 1.5 though.
If you are afraid of work...I wouldn't recommend the LS. It isn't hard, but it will take some time and a little bit more money. Both will require some kind of work though. Your 90 CRX HF will need mounts, axles, linkage, ecu, engine and tranny for the LS. Depending on what year LS...you will have to get it run the same year electronics(OBD). If you run the D15BVtec you will also need to get the CRX to run the different OBD and the Vtec. So both will require some sort of work and time.
If it was up to me, I'd go with the LS, but it's up to you and what you want out of it.

-Lor</TD></TR></TABLE>


all u would need to do is switch injectors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxdx89 &raquo;</TD></TR><TR><TD CLASS="quote">


all u would need to do is switch injectors </TD></TR></TABLE>

uh..?

 

when I dropped a 93 b18a into my crx, all I had to do was change the obd-1 parts to obd-0 parts. Distributor and injectors was all, I believe. Somebody said you have to re-pin something? I never re-pinned anything, moter went in smooth, ran awesome. Very much worth the money IMO. It actually didnt cost that much, just the Hasport mounts and linkage raped me back then. So, just use your stock wiring harness, HF injectors, you might actually have to get an integra alternator too, dont think the d-series one will work. I bought all brand new stuff for mine anyway.

 

DONT use the hf injectors! i tried this on a sohc non vtec zc thinking they flow 240cc's, we were wrong!

 

I have a 96 LS motor in my 88 HF and it rocks. The closer gearing of the gsr ys1 tranny really wakes that engine up. Its a blast to drive. Get the LS, torque is hella fun in a light *** HF....

 

I have a better idea Forget both motors and go with a non-VTEC B20 setup. This setup gives you roughly the HP of a B16A with better torque than an LS. And it doesn't cost much (if any) more than a later model LS. I should also mention that this setup seems to be a GREAT crowd pleaser, as I have yet to hear anything negative about it. As for the difficulty, it is the same as the LS. Speaking of difficulty, a B-series swap is really no more difficult than a D-series swap. With a mount kit, the B-series drivetrain drops right in just like stock.

 

I agree completely. It seems like putting a single cam in has become the new black. A b20 is a better platform to start from. The old adage still applies "No replacement for displacement".