I'm doing a small swap to my Hatch and wanna know if what i have will work with this swap...i've had diff people tell me this and that but it just gets me more confused..any knowlege would be greatly apreaciated! Thanks alot.

This is what i have so far!
98 y8vtec head
98y8 intake mani/y8 fuel rail/Tb/inject.
obdo Pr3 ecu
si wire harness

all of this is going on the D15b1 block and im keeping it 4spd.

 

I know i need an obdo si dizzy!

 

any body!

 

okay so here is the deal since the car is dpfi in the dx first you need to convert over to mpfi so now you have 2 options first is swith to the a6 intake manifold tb fuel rail and injectors they will all bolt up to the head and you can use the stock dx engine harness converted to mpfi but you need to add the wires for the resistor box the si engine harness doesn't plug into the dx chassis harness trust me i know the other option is to get a hold of is to go with the very common z6 intake mani. now they say obd1 injectors dont run the same so you dont need the res. box either way use the harness that is in the car now for the engine harness all plugs are there but the res. so its less work now the sencond part is to get an obdo to obd1 jumper harness for the ecu and run the p28 its the only way to make vtec work correct other wise the valve open but a/f ratio doesn't increase meaning no real power gain

 

im sorry i missed the intake mani you had but i would use a6 injectors for now less wireing but y8 and z6 manis are pertty much the same so use what you have

 

y8 mani is WAY better than z6 mani actually. and yea, stay with the obdo injectors+resistor box.

id get a pr4 or pm6 before the pr3 too.

 

^^Thanks to all! Is ther a reason i should go wit pm6/pr4 before thinking about using the pr3 ecu?

 

no im sorry I just reread pr3 odb0 then checked on it pr3 was obd0 with vtec but you mays till have to add the same wires you would w/ jumper I have olny seen obd1 vtec ecus and since they didn't have the vtec no vtec ecu needed so figured go w/ obd0 ecu till you got the jumper harness to go obd1 and run the p28 which is what im doing right now

 

Thanks alot! So until i get jumper to go obdo-obd1.......I can follow the
dpfi-mpfi covertions swap guide using my pr3 ecu.(what im saying is i still have to follow on swithing wires here and there.......correct?) Thanks again.

 

when I did my old mini me I redid the existing harness, used a obd0-obd1 jumper harness,p28, and a z6 dizzy and everything off the z6 head. you'll have to run a 4 wire o2 to get rid of the cel or at least I did, I'd get the y8 head gasket cause its the multi layer steel. I also had the 4spd and it would lag something terrible, but if its for gas mileage then i could see why your using it

 

Is using the z6 head gasket alright...cause i already got the z6 gasket set(full)
then finding out that what my boy had on his block was a y8head...will all gaskets still work, i know the intake mani gasket is diff. but would i still be able to use it!

 

what i mean with the gasket is the z6 gasket has a sort of squarish spot for coolant to flow and the y8 has a circle but circle is smaller than the sqaurish part so can this be used?

 

are you talking about the intake or head gasket^ ?

 

I was talking about the intake gasket but i would like to know about the head gasket aswell! Thanks.

 

I'd use the correct intake gasket for whatever IM your gonna use. I think the z6 head gaskets are composite or something(not positive) but the y8 are multi layer steel, so i'd use that one. steel > composite ish. make sure to remove the oil jet that's between cylinder 2 and 3, idk if you knew that or not.

 

^^^Yes i am aware of the oil jet for vtec to work propper! Thank you for informing me though i respect that! so i'll have to get a y8 head and intake gasket...Thanks

 

good luck, get a proper timing belt for what ever head you use.
and get rid of that tranny. el oh el

 

LOL......Thanks!

 

i'm still trying to figure out why you want to use a dohc b16 ecu to run a sohc engine..

anywhoo. here's a helpful link for doing the dpfi to mpfi conversion

http://hondaswap.com/swap-articles/d...writeup-49557/

 

Its just simply because i have it already(also becasue its an 0bd0 ecu) it should work fine! Thanks for that helpfull info im writing step by step on paper now.........:t humbup:

 

sure it will run the engine, but i hope you're only using it for a temporary fix.. the fuel maps for a b16 are way different in comparison to a sohc vtec engine. if you want it to run properly and efficiently you should invest in a p28, or some other ecu with an equivalent/y8 basemap.

 

what would be a good obdo ecu to use if im using this y8 head...cause i wanna stay obdo! would the pm6 work well. is the p28 obdo or obd1?

 

p28 is obd1, you can bandaid it with the obd0 for now but i recommend the obd1 conversion.

 

what ecu would be could for using my y8head...can i just use the pr3 ecu or will this cause major failure?

 

p28 is obd1. truthfully it will never run right if you stay obd0, because an obd0 sohc vtec ecu does not exist. you could run a pm6 and an rpm activated switch to engage vtec, which some people do, but i would certainly not recommend this. with the pm6 you will be running lean all the time, due to the mini-me's increased compression. if you engage the vtec solenoid with a switch, all you will have in the end is a noise machine, but you won't be accomplishing anything. the pm6 has no provisions to add extra fuel or change anything when you manually engage the vtec solenoid. realistically, if you want it to run right and be reliable, you need to convert to obd1.

edit: if you want to be cheap, then yes you can use the pr3, but like i said it is not designed for the engine you are expecting it to run. and you will certainly be running rich i can guarantee you that much.