LS/Vtec TECH
 

Ok. Winter has arrived. Im thinkin ls/vtec in my 88 Si.

Where to begin... ok.. this is my idea..

- b18b shortblock (newest i can find)
- b16 head (my understanding is obd0/1/2 is all the same and its the IM and dizzy that are diff..)
- b16a1 (obd0) IM w/ TB and sensors.
- b16a1 (obd0) dizzy
- pr3 (b16 obd0) ecu.?
- cable trans.

i'll have to add what. 3 wires for vtec? everything else should just plug in? Does anyone forsee any problems with that setup?

Re:LS/Vtec fun
 

besides the mounts and shift linkage, it sounds like everything should be plug and play. i thought it was just two wires for the vtec though?? and is a pr3 really gonna be enough? you will be needing more fuel than just regular b16, hell, if i was you, i would just get an obd1 b16 wiring harness and obd1 ecu and go ahead and upgrade to obd 1, also then you wouldn't have to worry about running extra wires to the ecu :-\

Re:LS/Vtec fun
 

---- you're right i completely forgot about the pr3 being b16 arg!! maybe a type R ecu? or can I just chip a pr3 w/ b18c fuel tables?

Re:LS/Vtec fun
 

yeah, or just get a little bigger injectors with a vafc :-\

Re:LS/Vtec fun
 

see now this is gunna be a pain in the ass.

maybe I'll just get a b18b long block. sell the dizzy and IM and get b18a pieces to replace w/ a pr4. :-\

Re:LS/Vtec fun
 

type R ecu?

u need a chipped PR3 ecu

Re:LS/Vtec fun
 

just get an obd1 harness and you're in there. you could just chip the pr3 like chingro said, but i would just rather have vafc, but that's just me, having an lsvtec over a reg. b18, would be well worth the obstacles you face ;)

Re:LS/Vtec fun
 

ok ok im a lil confused, how would the obd1 harness help? so i could use a gsr ecu? what about butterfly valves, i dont want to stare at a cel all day long :)

Re:LS/Vtec fun
 

no, no, no, i was just saying that it will be easier to find obd1 b16 head than it will to find an obd0 head, and instead of finding an obd1 head and making it obd0 compatable, you might as well just get an obd1 harness and ecu (all you would be getting exra would be the harness, cause you have to get a diff ecu anyway you do it), also an advantage of getting a whole new harness would be that you don't have to run extra wires to the ecu, the harness would plug right up like factory.

Re:LS/Vtec fun
 

hrmm.. but the only things on the head that differ from obd0-1-2 are the IM and dizzy right?

Re:LS/Vtec fun
 

i think yer correct

If it was me I would get a pm6 chipped thats me though.

conersion harnesses are about 100.00 USD

Re:LS/Vtec fun
 

chipped and use a vafc or rpm switch to turn vtec on ?? i want this to be completely reliable. it's a daily driver. Thats why im thinkin obd2 ls block and head with 90-91 ls dizzy and IM w/ a obd0 LS ecu(pr?) plug and play.

Re:LS/Vtec fun
 

well, i know for my obd2 engine that i swapped into the teg, all i did was use my obd1 injectors and dizzy, but i'm not familiar with obd0, so i'm not sure if it's the same for obd1 to obd0. i just think it would be a lot easier finding an obd1 head/manifold. and the only reason i'm suggesting swapping a complete harness is just because of the fact that you wouldn't have to wire in the vtec solenoid, you could just plug it right up.

Re:LS/Vtec fun
 

sounds like a plan kevin..

now.,.. keep in mind i've never pulled or even seen a car honda w/o a motor in it so this is all new to me.

question.. harnesses.. is there a plug at the firewall or is it one long cable.

example 1.

ENGINE |-----------| ECU

example 2.

ENGINE |-------|FIREWALL|------| ECU

^^^ is there a plug here or just a grommet?

Re:LS/Vtec fun
 

i believe there is just a grommet that the bundle of wires pass through to you ecu. i've never paid too close attention, but i think i would remember seeing another plug ;)

Re:LS/Vtec fun
 

if i remember right........ engine plugs firewall ecu...

on obd1-odb0 change the dizzy and the injectors.




oddly enough my 92 hb b18 has obd2 injectors in it :-\

Re:LS/Vtec fun
 

come again? ???

you mean
ENGINE |------------| ECU
^^ fire wall grommet somewhere in the middle?

Re:LS/Vtec fun
 

2 connectors on each sides of the engine. 3 plugs on the right, and 2 on the left, disconnect those along with a few little others, and you can leave the entire engine harness on the engine when you pull it out.. its the easiest way.

You may want to look into turboedit or ghettodyne for your ls/vtec... you can program it anyway you want, its obd0 and you have that option for boost later down the road.

Re:LS/Vtec fun
 

he's just asking about the "ecu to engine" harness in order to replace it with obd1

Re:LS/Vtec fun
 

huh? lol.. anyone feel like drawing a pic of it in mspaint and emailing it to me? LMAO.

Re:LS/Vtec fun
 

i didnt think vtec engagement was done yet?

Re:LS/Vtec fun
 

Oh thats right.. not a big deal I guess, all you need is a RPM activated switch to turn on vtec. Simple as that.

Thats basically what my zdyne does.

A picture? of what.. how to take the engine harness off? just go pop your freaking hood and look. Its not rocket science!

Jeff

Re:LS/Vtec fun
 

no i meant a pic of the harness.. crude. Like.. is it one continuous harness from the ECU then brances off inside the engine bay too all the different sensors?

yah.. just tune a pm6 from low lobes below x rpm and tune for high lobes after xrpm and put the switch to = X right.

Re:LS/Vtec fun
 

no, a harness goes from the ecu and splits up into a couple of big plugs, that's what the actual "engine harness" hooks up to inside the engine bay. hold on, i think i have a pic from when i did my swap, it might take me a few minutes to find it and host it, i also have to take a bad pisssss........

Re:LS/Vtec fun
 

What the hell is wrong with you ???

You have a main engine harness, that runs across the engine/tranny starter. It dissconnects on each side near the strut tower, 2-3 plugs per side, disconnect all the small plugs, like Reverse light plug/ign on wire (fusebox) and walah.. the freaking harness is just sitting there.

Turboedit/Ghettodyne is basically the exact same thing I use. I just paid 1000 for mine :-\ It does all the same stuff, lets say you start off with a base B16a map and just modifiy the fuel tables, and change timing around.. There ya go, you have a base B18 map now.

Jeff

Re:LS/Vtec fun
 

first we have the engine harness unplugged from the main harness, the two plugs go to the fuse box, then to the ecu (via through the firewall)
http://img.villagephotos.com/p/2003-...nesstoecu1.jpg

here we have the same thing on the driver side, two bigger plugs, no fuse box, and i don' know where the hell they go on the other side of the firewall, i don't think they run back to the ecu though.
http://img.villagephotos.com/p/2003-...nesstoecu3.jpg

and here, we have the two plugs on the passenger side with the "engine harness" still hooked up to them. the engine harness plugs in here, runs across the engine with numerous plugs which plug into all the sensors, and plugs back in on the driver side like in the second pic, so the engine harness plugs into both sides of the car, it is it's own seperate piece of harness. all you have to do is unplug it from the driver side plugs and the passender side plugs, and disconnect the main power going from the fuse box. and the rest can stay attached to the engine while you pull it from the car, as it is completely disconnected from the car now.
http://img.villagephotos.com/p/2003-...nesstoecu2.jpg

Re:LS/Vtec fun
 

my 1992 Integra

hey seeing those pics reminds me of the days i had my 92 LS/VTEC teg.

Re:LS/Vtec fun
 

nice man, i wish i could have afforde to keep my teg with my new car also (i can now, just couldn't at the time), i would like to find another one for a good price just to have. mine was a 93 ;D

Re:LS/Vtec fun
 

LOL...that car is sold....after me it has been tru hell.
i had it for awhile and no one knew what i had in it.....
i raced it once awhile..and took it to the track three times....16.6 STOCK LS, 15.2 best run with LS/VTEC

the owner after me, race alot, and brags to everyone he has a fast car....and one day he woke up and it was gone.(ass parked it on the street, and i was mad upset...even though i lost nothing)

..oh well....that is life.

Re:LS/Vtec fun
 

this thread= hijacked!

http://img.villagephotos.com/p/2003-...4/DSC01703.jpg

http://img.villagephotos.com/p/2003-...4/DSC01718.jpg

http://img.villagephotos.com/p/2003-...4/DSC01706.jpg

Re:LS/Vtec fun
 

ooh i get it now!! thanks kevin that explained alot!

so.. there is a harness for all the sensors/injectors and ---- attached with the engine. they all pool into 4 plugs total, 2 on driver side and 2 on passenger side. from there the pass side goes to the ecu and the driver side probably goes to like the main relay and cluster and fuse box and ign. cool. thanks. I've never dug this deep into my car and want to know what im getting into ;)

Re:LS/Vtec fun
 

yea and a conversion harness hooks to the end of your ecu plugs and extends them a little and converts it to whatever you bought it for

hence

ecu plugs obd2 ------ conversion harness ---------- obd1 ----------ecu

i hope that makes sence lol

Re:LS/Vtec fun
 

ya.. for conversion harness. it plugs inbetween the ecu and the plugs that go right into the ecu right?

Re:LS/Vtec fun
 

Yeappers now yer on track. Sorry i couldnt explain it better before lol......

Re:LS/Vtec fun
 

lol yah i get it now..

Re:LS/Vtec fun
 

here is an actual engine harness, one end plugs into the driver side plugs, the other plugs into plugs by the fuse box, everything inbetween, connects to your sensors on the engine.

http://img.villagephotos.com/p/2003-...nesstoecu4.jpg

sorry for hijacking the thread for a minute, looks like it's back under control now ;)

Re:LS/Vtec fun
 

a little small but once again helps.. thanks guys.

Re:LS/Vtec fun
 

Well if you do decide to run a pr3/pwo (which you should) I can send you a good tune for it for the cost of the chip and shipping. I garantee it will be better than any Ebay chip.

Good Luck

Re:LS/Vtec fun
 

Not positive if this was said or known, but you cant use a obd1 dizzy and a pr3/pw0 ecu together! And vice versa.

Re:LS/Vtec fun
 

I'm curious. Do you think that a P72 (Integra GSR) ECU would be sufficient for a baseline LS/VTEC. Eventually I'm going to be spraying on the thing but for stock daily driving for awhile do you think it will be enough?