I have a 91 crx hf. YOu know d15b6 engine. 8 valves, 90 horsepower. Thats some scary power there. But to test the laws of phyiscs themselves I was wonering if I could swap in a head from a crx si, also what kind of power gains(if any) could I expect.

 

first you have only 62 hp.yes you can put the head of crx si.but convert your dpfi to mpfi and you have approxymattely 100 hp.

 

maxim is right.

 

thats 62 to the wheels. but its 90 something at the flywheel. but either way thats too much work the hell with it.

 

no, 62 TOTAL, and i thought hf's were already mpfi.

 

OK I know how much horsepower my car has and its about low 60's TO THE WHEELS. I have about 90 at the flyfeel. OK!

 

lol, camarocrusher, save yourself the embarrassment and go here:

http://hybrid.honda-perf.org/tech/engine.html

oh and all those hp figures are at the crank, not the wheels.


[Modified by DX-R, 4:34 PM 3/10/2002]

 

According to my Chilton's Repair Manual:
D15B6 1.5L(1493) DP-FI 62hp @ 4500rpm 90ft. lbs. @ 2000rpm

Now my manual says dpfi but i thought they were mpfi. What is up with that? Also those numbers are at the crank and why are you so positive we are all wrong and you are right?

 

I think 88-89 were dpfi and 90 and above was mpfi. And the early ones only had 62 hp and the crank and the newer ones had 70.

 

88-89 HF is DPFI 62hp at the CRANK
90-91 HF is MPFI 70hp at the CRANK

 

thanks DX-R

 

np

 

ahh, i had no idea they were dpfi in 88-89.

 

my 89' hf has mpfi

 

and i can guarantee it didnt come that way from the factory.

 

I can garuntee you that it did come that way, as I have worked on several 89's at my shop, and a freind of mine owns one. According to my Helms Factory Service Manual for the 1988 CRX, it also had MPFI rated at 62 HP. Please stop throwing around misinformed information, it helps no one!


[Modified by CRX-RX, 2:10 AM 3/11/2002]

 

Yea What He Said
I Just transplanted a Dx block and head into my Hf and the reason why i did not just switch the head is because i did not know if the piston would le it or not. Now I know and am glad i didn't

 

after further research i found that the 88-89 CRX HF has MPFI(62 crank hp) and the 90-91 CRX HF also has MPFI(70 crank hp) the 88-91 CRX DX has DPFI(90 crank hp). i dont care about being wrong about the MPFI/DPFI and which years came with which. i was proving my point that his motor(d15b6) didnt have 90hp at the crank.


[Modified by DX-R, 4:46 PM 3/11/2002]

 

My mpfi d15b has 94hp at the wheels

It's still stock too.



[Modified by psyphre, 12:50 AM 3/12/2002]

 

OH YEAH WELL, WELL I HAVE A TURBO ON IT AND HAVE OVER 500 HP! (I'm kidding can you tell)

 

It would still be slow because of the transmission. So you would have to change that out if you wanted to get any power from the swap.