DPFI to MPFI Conversion

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midnightEF
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Re: DPFI to MPFI Conversion

Post by midnightEF »

I have d15b2 and considering swap. I have a 85-87 crx si motor in back yard. With the mpfi. It says pe7 on the head and IM and ecu. I will post pics if needed. Just wondering if I can use the IM from the crx motor on my d15b2? Along with the ecu and dizzy... it has vaccum lines and such on the dizzy yada yada yada....
90/89 std/dx hatch/5speed crx trans

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cougar289
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Re: DPFI to MPFI Conversion

Post by cougar289 »

midnightEF wrote:I have d15b2 and considering swap. I have a 85-87 crx si motor in back yard. With the mpfi. It says pe7 on the head and IM and ecu. I will post pics if needed. Just wondering if I can use the IM from the crx motor on my d15b2? Along with the ecu and dizzy... it has vaccum lines and such on the dizzy yada yada yada....
Nope EW parts won't work.

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classictuners
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Re: DPFI to MPFI Conversion

Post by classictuners »

You can spend $500-800 on a jdm zc sohc 1.5 or 1.6L non VTEC obd0 engine tranny and ecu, now all you have to do is modify your dpfi wire harness, and maybe track down a resistor box if it's not included in the swap. You'll gain the most power this way compared to just slapping on a mpfi intake manifold and dizzy. I bought a d16a6 engine, tranny, ecu, complete front suspension, hubs, and axles for $300 It was actually a 1990 civic EX that was rear ended, totalled and only had 135K.
Lets see, a 1991 civic dx had 92 hp, the si had 110 hp, so thats 18 hp difference. Remember that your d15 is .1 liters less displacement and different cam grind. So to get max power from a dpfi conversion on a d15 is to swap out the d15 cam for a d16a6 cam, even then, i don't think you'll gain 18 hp.
Now on the std d15, you only have 70 hp, i believe the 20 hp difference is mostly due to the cam profile and ecu tune. So maybe a dpfi swap in a civic std will technically result in the biggest gain.
But of course the biggest gain will be a mini-me or dohc zc dpfi-mpfi.
If you have a tight budget, pull-a-part is your friend. you should be able to get everything you need for a basic mpfi conversion for a c-note or two, if you can, be sure to grab the d16a6 camshaft 8)
Loving Father, Honda Tech, Aspiring Auto-crosser, tenacious builder...

Honda inventory...
- 1991 Civic DX hatchback, SCCA Solo E Prepared
- 2010 Honda Fit Sport, SCCA Solo Street Touring FWD, Toyo tires

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cougar289
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Re: DPFI to MPFI Conversion

Post by cougar289 »

The hp will be about the same between the D15 and D16 bottom ends. The D16 will have a bit more torque though and that's a big deal on a honda lol

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el_jelly
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Re: DPFI to MPFI Conversion

Post by el_jelly »

This thread is for DPFI-MPFI conversion info only, please post questions on the tech area. ;)
IHeartMySTD wrote: We all know we like our women and cars with D's, not B's!!!! ;)
Where most of the questions are already answered > Engine swap guide, FAQs and Index thread

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Sandman
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Re: DPFI to MPFI Conversion

Post by Sandman »

el_jelly wrote:This thread is for DPFI-MPFI conversion info only, please post questions on the tech area. ;)
As he said ;)
Stand up and fight!
1988 Civic HB 1.6i-16(D16A9) R63 "Rio Red" Member ride topic
1989 Civic 4D 1.6i (D16A7) Asturias Gray Metallic(sold)
2015 Accord Sport Business
1993 Kawasaki Vulcan 1500

90civic-hatch
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Re: DPFI to MPFI Conversion

Post by 90civic-hatch »

check out ebay i find stuff on there from time to time

Annagyijjk
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Re: DPFI to MPFI Conversion

Post by Annagyijjk »

people have two turbod B16, but I think it's a loss of a twin turbo 1.5L, because the amount of exhaust gas is relatively low.

dtgodmage
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Re: DPFI to MPFI Conversion

Post by dtgodmage »

so my spark plugs are in the middle of the block

but i also have the pgfi circle thing in the first pic in the first post

but i also have the throttle body that looks like the second pic with vtec what do ig ot?

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el_jelly
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Re: DPFI to MPFI Conversion

Post by el_jelly »

Picture corrected to avoid more confusion.

If your engine is like this:

Image

then is a dohc engine, and its already mpfi. Like it was explained in the first post.
IHeartMySTD wrote: We all know we like our women and cars with D's, not B's!!!! ;)
Where most of the questions are already answered > Engine swap guide, FAQs and Index thread

dtgodmage
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Re: DPFI to MPFI Conversion

Post by dtgodmage »

well it don't and exactly what parts i need have me really confused all i know is get a d16a6 intake manifold the rest is mumbo jumbo

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el_jelly
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Re: DPFI to MPFI Conversion

Post by el_jelly »

Go to page 2, check the last message.
IHeartMySTD wrote: We all know we like our women and cars with D's, not B's!!!! ;)
Where most of the questions are already answered > Engine swap guide, FAQs and Index thread

2 Stroke Toy Chest
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Re: DPFI to MPFI Conversion

Post by 2 Stroke Toy Chest »

A good link with pictures , regaurding the resistor box
http://h-tune.co.uk/tech/?p=258

warrior23
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Re: DPFI to MPFI Conversion

Post by warrior23 »

Doing the DPFI to MPFI in my 90 Hatch. Trying to get the 2 pins out...C1 and C2 to move to
B10 and B12.......Is there a special way to remove these pins. I've been trying for awhile with
no success. It was easier changing the motor over than this. I'm starting to go Cross Eyed.....http://www.civic4g.com/index.php/forum/ ... f=19&t=129#

knockz87
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Re: DPFI to MPFI Conversion

Post by knockz87 »

i am really with conversion from DPFI to MPFi.(NOOOOOOBBBBBB)
I have a 1991 Civic HB 1.5 engine with D15b2 with DPFI.
Can anyone show me or make a video on how to do the conversion? So i can follow it step by step, because abbreviation and short term for parts are kinda confusing for me. and can someone PM the list of parts i'll be needing for this conversion. Thanks!

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