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View Full Version : crx si with vtec head.



chillar
03-27-2002, 07:55 PM
my brother has a 91 crx si and wants to put a vtec head on it. does it matter if he uses the 1.5 or the 1.6? thanks

pimpinpiggy
03-27-2002, 08:42 PM
hey i say go with 1.6 and im not sure if they even make 1.5 vtec motors... im not sure on that but yea if your gonna do it why not just go with what the engines meant for and i know si are 1.6 so yea go with 1.6 hope i was helpful

CRXTZ
03-27-2002, 09:12 PM
well they do make 1.5 heads, but i would go w/ tha 1.6 if you can and like tha guy said b4 tha crx si motor's are already 1.6 so put the one on thats made for it.

wadeice
03-28-2002, 12:25 PM
i'm also thinking the same thing for $$$ reasons...can anybody elaborate on what else is needed besides the computer and harness (obviously) :???: :???:
thx
wade

chillar
03-28-2002, 01:05 PM
thanks for the info people. :grin:

CRX_91SI
03-28-2002, 07:30 PM
now i'm not 100% sure on this but i dont think they offered a 1.5 Vtec in the U.S.

I know for sure tho that they offered it in Japan in.

But anyway, you'd be better off just using a USDM 1.6 EX/SI head just for the fact that they're easier to come by. I see these shits all over the place for less then $200 sometimes.
Its not a complicated thing to da either. If your looking to sawe a little $$ and dont feel like doing the full Z6 swap, then this is the way to go. But on the down side, i have not heard anything good about reliablity. And i heard that you wont get as much power as you would with a full Z6.

Here's what you need
- Z6 head from a 92-95 Civic Si/Ex
- Head gasket, intake gasket, and exaust gasket from 92-95 Civic Si/Ex
- Timing belt from 92-95 Civic Si/Ex
- Valve cover gasket for a 92-95 Civic Si/Ex
- RPM Activated switch, or Vtec controller (such as Fields, or APEXi)
- Adjustable Fuel Pressure Regulator, or FPR from 92-95 Civic Si/Ex.

if you need a guide and still have more questions, take a look here

http://crx.honda-perf.org/articles/z6swap/z6swap.html

peace

CRX_91SI
03-28-2002, 07:44 PM
On 2002-03-28 19:30, CRX_91SI wrote:
now i'm not 100% sure on this but i dont think they offered a 1.5 Vtec in the U.S.




actually, not i'm sure of it. Did some reading and found a bunch of info on the 1.5 VTEC's.

The VTEC-D15B engine is a 16-valve SOHC design with a displacement of 1493cc and uses the PGM-Fi fuel injection system. It develops a high 130ps at 6800rpm with max torque of 14.1kgm at 5200rpm

It is found in the EDM(european domestic market) on the later 92- and up Civic VTI's. It's basicly the same thing as a USDM 1.6 D16Z6 but in a 1.5

Prety cool huh?

90HBSleepr
03-29-2002, 12:20 AM
Tell me this: could I put a SOHC vtec head on a 88 crx dx? (1.5 liter)

MANGLEdCRX
03-29-2002, 01:19 AM
They had a 1.5 Vtec here it was in the Civic VX I think its called "VTEC-E" the "E" stands for economy it was a sohc 1.5 8 Valve putting out a whopping 92 HP.

the 1.6 liter d16z6 and the d16y8 are the heads you wanna go for yes it can be mated to a 1.5 block but I think the timing mey be off a tooth if ya do that, also if your gonna put a vtec head on a DX your gonna need to do some wiring, a lot more then you would if you had an Si. Hope this helps

-ROB- :eek:

90HBSleepr
03-29-2002, 02:09 PM
VTEC-E sounds worthless.. hehe. The stock 1.5 DX engine puts out 92 doesnt it? and it's 16 valve. correct me if im wrong.

MANGLEdCRX
03-29-2002, 07:40 PM
On 2002-03-29 14:09, 90HBSleepr wrote:
VTEC-E sounds worthless.. hehe. The stock 1.5 DX engine puts out 92 doesnt it? and it's 16 valve. correct me if im wrong.


It sounds worthless cause it is, and yes your correct the DX engine puts out 92 HP, but the vtec e is only 8 valve

90HBSleepr
03-30-2002, 09:39 AM
I've also noticed that the honda insights use VTEC-E. 3 cylinder...

MANGLEdCRX
03-30-2002, 12:22 PM
On 2002-03-30 09:39, 90HBSleepr wrote:
I've also noticed that the honda insights use VTEC-E. 3 cylinder...


yep a VTEC-E 3 cylinder 12 valver