questions with upgrades!!

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Old Jan 29, 2013 | 01:28 PM
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mrbojangles2013's Avatar
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Default questions with upgrades!!

Hi everyone, im new to the whole forum thing, so if im in the wrong place, please point me in the right one! but anyways, i have a 1990 civic dx with a d15b2 block. i just wanted to know what are all the different size heads that will fit on this size block. i think d16z6 is one of them that will, but im sure there are more. i dont really care what size or even if its dual over head cam, i just want to know what else will go on here so i can get the cheapest head to put on it to get it back on the road!! ive heard that putting a vtec on a non-vtec motor requires a little jimmying, but im not sure. someone enlighten me please!!
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Old Jan 29, 2013 | 01:47 PM
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Default Re: questions with upgrades!!

All the 88~?? D-series heads fit with exception to the dual cam ZC head.

CHEAPEST head would just be to put another B2 head on there.
Dime a dozen.
The D16A6 had the same exact casting so that is pretty much a direct replacement.
Possibly a little more aggressive cam as well.

If you are trying to get more performance out of this, then you need to search for DPFI to MPFI (intake manifold, distributor, wiring modification, and ECU change).
Your B2 has 2 injectors while all other D-series have 4 injectors.

A vtec head is typically referred to as a "mini-me" so you can do some searching for that.
In addition to the MPFI change, it would also require an ECU change to get vtec to function as well as the oil restrictor in the block removed.

You will need to consider the timing belt and mechanical timing if you finally choose a different head.
All these mix-and-matches have been done already so do some internet searching.
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Old Jan 29, 2013 | 01:50 PM
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Default Re: questions with upgrades!!

You can put any d series head on, except for the dohc zc. You just have to get the correct timing belt and/or can gear combo. But the best thing to do would be to convert your motor from dual point fuel injection, to multiport fuel injection aka, convert it to use 4 injectors instead of 2. There are TONS of write-ups on it. Just use the search function on google.
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Old Jan 29, 2013 | 02:14 PM
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Default Re: questions with upgrades!!

ok so no zc..gotcha! so is the dpfi to mpfi change hard? what all parts does that require? just more specifics please
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Old Jan 29, 2013 | 03:02 PM
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4drEF's Avatar
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Default Re: questions with upgrades!!

Originally Posted by mrbojangles2013
ok so no zc..gotcha! so is the dpfi to mpfi change hard? what all parts does that require? just more specifics please
There are ZCs that are single cam. They work.

DPFI is really not hard.
Some people get confused easily and overthink the whole process.
It's about 12 things you do.
http://hondaswap.com/swap-articles/d...writeup-49557/

Many other write-up as well.

You will need the entire intake manifold, ECU, distributor that is compatible with your ECU, and maybe an injector resistor box depending on the injectors you use.
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Old Jan 29, 2013 | 04:05 PM
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Default Re: questions with upgrades!!

oh that doesnt look too hard at all..if only i could come up with the money haha. looks like 300 is about a solid guess for price? i got a buddy who has a si with all that crap so ill probably get it from him for cheeps. now it says it adds more power, but i wonder how much power? >
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Old Jan 29, 2013 | 04:38 PM
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Default Re: questions with upgrades!!

DPFI d15b is rated at 70hp and MPFI at 90 if i'm not mistaken.
looks simple and worth it if you can source the parts imo
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Old Jan 30, 2013 | 07:08 AM
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Default Re: questions with upgrades!!

More like 92hp and 89 ft.tq, i now those are the ratings of my 88 crx dx auto with DPFI...
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Old Jan 30, 2013 | 03:40 PM
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Default Re: questions with upgrades!!

Originally Posted by ecoweapon
More like 92hp and 89 ft.tq, i now those are the ratings of my 88 crx dx auto with DPFI...
exactly:

D15B1
Found in:
1988–1991 Honda Civic Hatchback
Displacement : 1,493 cc (91.1 cu in)
Bore and Stroke : 75 mm × 84.5 mm (3.0 in × 3.33 in)
Compression : 9.2:1
Power : 70 hp (52.2 kW, 71.0 PS) at 5,500 rpm[8]
Torque : 73 lb·ft (11.4 kgm, 112 Nm) at 3,000 rpm[8]
Valvetrain : SOHC (4 valves per cylinder) non-VTEC
Head Code : PM3
Fuel System : Dual Point injection (PGMFI)
ECU Code: PM9

D15B2
Found in:
1988–1991 Honda Civic GL/DX/LX
1988–1991 Honda Civic Wagon Wagovan/DX
1988–1991 Honda CRX DX
1992–1995 Honda Civic LSi Hatch/Saloon (European Market)
1992–1995 Honda Civic DXi Hatch/Saloon (European Market)
1990–1995 Honda Concerto (European Market)
Displacement: 1,493 cc (91.1 cu in)
Bore and Stroke: 75 mm × 84.5 mm (3.0 in × 3.33 in)
Rod Length: 134 mm
Compression: 9.2:1
Power: 92 hp (69 kW) at 6,000 rpm (US)
90 PS (66 kW) at 6,000 rpm (Europe)[9]
Torque: 88 lb·ft (12.2 kg/m, 119 Nm) at 4,700 rpm
Valvetrain: SOHC (four valves per cylinder)
Cam Gear: 38 tooth
Piston Code: PM3
Fuel Control: OBD-O DPFI and OBD-1 MPFI
Redline: 6,500 rpm, 7,200 rpm rev limiter
Head Code: PM5
ECU Code: PM5/P04
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