d16y8

[supermang]

question if it doesnt say vtec than is it or whats this whole e-vtec ish?........

[Chinky]

question if it doesnt say vtec than is it or whats this whole e-vtec ish?........

single cam motors don't say v-tec on them.

and the e-vtec u speak of... i assume ur talking about economy???

[Neebs]

Vtec-E is from the d16y5 engine which is an HX. Its just an economical car.

"SOHC VTEC-E
Honda's next version of VTEC, VTEC-E, was used in a slightly different way; instead of optimising performance at high RPM, it was used to increase efficiency at low RPM. At low RPM, one of the two intake valves is only allowed to open a very small amount, increasing the fuel/air atomization in the cylinder and thus allowing a leaner mixture to be used. As the engine's speed increases, both valves are needed to supply sufficient mixture. A sliding pin, which is pressured by oil, as in the regular VTEC, is used to connect both valves together and allows the full opening of the second valve."

-Wikipedia

[nuocmam]

single cam motors don't say v-tec on them.



im pretty sure that some of them do, like some of the d16z6, d15b, d15z1, zc, etc motors

[Chinky]

im pretty sure that some of them do, like some of the d16z6, d15b, d15z1, zc, etc motors

on the valve cover? show me please

[auex]

the d16z6 said that. The y8 doesn't. It has vtec on the intake side. The y5 has vtec-e.

[Chinky]

the d16z6 said that. The y8 doesn't. It has vtec on the intake side. The y5 has vtec-e.

did not know that... thanks :thumbup:

[nuocmam]

here's a d16z6

[JDM_sohc]

hers my d16z6 valve cover on my d16y8 head!!

[Peteex]

http://www.superhonda.com/photopost/data/501/medium/IMG_01052.JPG

my D15B VTEC with OBD2b conversion.

[Paper Boy]

^^ hey pete what all was involved in the obd2b conversion? im currently in the process of doing that and want to make sure i get it right.

[MichaelKnight]

My D16y8 :smile:

[projectaccord]

an older, and newer one of my y5 :) to put it in simple words, they pretty much run on 8 valves at lower rpms, and all 16 valves when in higher rpms (VTAKK!!)

[Chinky]

z6 is the only single cam that has v-tak on it????

[Peteex]

z6 is the only single cam that has v-tak on it????

No, HX motors(Y5's?,) y8's and some D15B's(non-USDM) SOHC's have Vtec.

^^ hey pete what all was involved in the obd2b conversion? im currently in the process of doing that and want to make sure i get it right.

things you need to change out:

Oil pump (for the Crank position sensor)
Oil pan
Fuel rail/injectors/FPR
Distributor

I think thats it, oil pump/pan and distributor is a must, fuel stuff is only if you don't want to cut and splice.

You will also need to ground out your Knock sensor as the OBD1 blocks, at least on the D15B don't have one. I passed emissions with flying colors.

[Chinky]

No, HX motors(Y5's?,) y8's and some D15B's(non-USDM) SOHC's have Vtec.

i had a 98 hx and it didn't say v-tak original motor and all...

[mooshin]

i had a 98 hx and it didn't say v-tak original motor and all...

That is because USDM D16Y5/Y8 vtec heads all had valve covers that looked the same as the non-vtec D16Y7. They just said "Honda", and that's it.

[Peteex]

i had a 98 hx and it didn't say v-tak original motor and all...

If you look under the breather hose for the valve cover there's a cylindrical piece that's brown/tan/white in color, that's the vtec soleniod. If you have one you should have vtec, unless its not operational or someone is playing a cruel trick on you.

you can see it clearly in this older picture of the engine right after the swap: (don't mind the rat's nest off to right)

http://www.superhonda.com/photopost/data/501/medium/DSCF0142.JPG

[MichaelKnight]

What is that wiring mayhem? Organized Chaos?

[Paper Boy]

Pete: Am i wrong in assuming you can run the obd1 oil pump in the car and just switch over to a obd1 ecu with a jumper harness? would this not bypass the crank position sensor circuit that would be running on the obd2b ecu?

[Peteex]

Pete: Am i wrong in assuming you can run the obd1 oil pump in the car and just switch over to a obd1 ecu with a jumper harness? would this not bypass the crank position sensor circuit that would be running on the obd2b ecu?

That should work, its originally what I was going to do.

Well, some of the plugs are physically shaped different between OBD1 and 2. So what your saying will work, but i think you would need to cut and splice the plugs for some of the connections, I could be wrong though.

Another problem would be emissions, if you have an OBD1 system in your OBD2 chassis it is technically illegal. Don't know if it will make any difference when they plug in if you're using the jumper harness.

[projectaccord]

if you have an obdII system in your car (1996 and newer), all they look for is the check engine light. as long as it turns on when the key is turned on with the engine off, and then shuts off when the car is started, its fine and will pass. if you've converted it to obdI, they wont know about it. the computer just wont be able to communicate with the ecu. then the manager comes out to look at it, and verifies the light turns on when the key is on, and then shuts off when the engine is started. he then bypasses it and lets you through.

[Paper Boy]

That should work, its originally what I was going to do.

Well, some of the plugs are physically shaped different between OBD1 and 2. So what your saying will work, but i think you would need to cut and splice the plugs for some of the connections, I could be wrong though.

Another problem would be emissions, if you have an OBD1 system in your OBD2 chassis it is technically illegal. Don't know if it will make any difference when they plug in if you're using the jumper harness.

Would it just be the intake air temp sensor that would need the plugs changed or the tb,map, and iacv also? i know i will have to use the rail and injectors from the obd2 motor but if I can leave the manifold and tb on and just get away with changing plugs i'd like to. Mostly because of the location of the IAT sensor on the obd1 motor.

[projectaccord]

^^ are you converting an OBDII system to OBDI??

[onefst91hatch]

OBD2 sohc vtec's dont say vtec on the valve cover. OBD1's do

^^ are you converting an OBDII system to OBDI??

no he is converting an OBD1 engine to OBD2

[Paper Boy]

^^ are you converting an OBDII system to OBDI??

Im installing an obd1 engine in an obd2b car and running it with obd1 software.

[Daddy_Digital]

the Y8 has vtec. it has E-VTEC. one of the guys already explained how it works, so i wont get into it. you really dont feel it or hear when it kicks in. atleast thats what i think, cus i use to have a civic with a Y8. not that much power, but it was really good on gas

[projectaccord]

^^^you mean Y5?? the Y8 comes in the ex, the Y5 comes in the hx

[supermang]

so E-vtec?

[nuocmam]

the y8 is vtec
the y5 is vtec-e

[civicsickness]

can u put a y8 valve cover(not labeled "vtec") on a d16z6 head?

[projectaccord]

^^i believe so

[civicsickness]

anyone kno for sure?

[projectaccord]

it will dude. they both have vtak so it will work fine.

[bballcrazy15]

which is the best single cam vtec? z6,y5,y8...etc

[Neebs]

Neither unless boosted.

D16y8 or JDM D15B is good.

[Neebs]

.

[bballcrazy15]

well which is best to do a mini me swap

[sohcisme]

The Z6 head flows the best and the A6 block has the strongest mains. Thats the setup i have. But if your no going to turbo it then just pick whatever vtec head you can find.

[raiders480]

d16y8 is a v-tec and e-vtec is an electronically controlled diplacement system where on low rpm's it works on 8 valve's then when on around 3 to 5 thousand rpm it works on all 16 but then when it hits 5 thousand rpm's or whenever v-tec kicks in.