my freind has a 98 hx with a zex cam and a t3 turbo, car has no power under 5000 rpm, one 5000 comes then it pulls crazy to 7000 as it just then pumching the gas. can he put an y8 or z6 cam in it?

 

What else is done to it?

With a turbo and being stock it should feel stock up until the point of boost.

If its built then it should have its power and then some when boost comes.

 

no vtec on the hx motor uses two lobes and vtec on y8 or z6 has 3 lobes or something like that. basically you cant use z6 or y8 cams in the y5

 

has dsm 450cc injectors, obd1 conversion, and running beerbongskickass uberdata map, i have same setup on my crx but pull all the rpm range after 2000 with a z6 motor

 

is it tuned?

 

tunned for a stock z6 with a t3 turbo, not for hx with zex cam, but he has no cam gear to tune the cam

 

turbo or na cam?

 

he bought it with a turbo zex cam already in it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sanitary6Gen &raquo;</TD></TR><TR><TD CLASS="quote">no vtec on the hx motor uses two lobes and vtec on y8 or z6 has 3 lobes or something like that. basically you cant use z6 or y8 cams in the y5</TD></TR></TABLE>

I strongly believe this man is correctly.

However, if for some reason you believe that you can make your Y5 head to work like a Z6 or Y8, which is great. (read the very very very old topic by Spade has he tried to discuss/explain why the Y5 has superior potential to any other sohc heads)
Then...
What ECU? Tuned with What? Who tuned it?

You said its tuned for a stock z6, but I'm not quit sure what you mean by that.

Stock HX's vtec kicks in about 3000ish RPM. And if thats where his car is still set at, your making the Zex cam use its high profile cam lope at 3000ish rpm will not make as much power as the cam's low profile cam lope.

How do you even know its a zex turbo cam? Maybe you got jipped?

 

using my map on a p28 obd1 coversion, my map is tunned for a d16z6 turbo(I hit 13.8 with street tires on this setup , with vtec hitting at 4850.
He's just wondering why his car is so slow

 

zex makes cams for that motor?

 

The HX ecu is different then any other ECU and you're not running it. Not good unless the one you're running right now is tuned to work somewhat the same as the HX one. Unless you're running the stock ECU... then your car is gonna run like ****. Is it an Auto or Manual btw?

Someone please correct me if I'm wrong. I'm still trying to learn here.

 

you kinda have to do your setup over again. you need the stock hx cam(unless you can find a place to give you a turbo profile regrind) and the hx p2n ecu, to make the hx function properly with the vtec and whatnot. the other option is to get a d16y8 head/im/distributor and put the cam in that, and run it as a y8 with vtec and not vtec e

 

Is the car holding boost under a load? Are you leaking boost or exhaust is the wastegate stuck partially open? There are a lot of other reasons to cause slow spool.... What trim is the t3. You sure it isn't just lag?? Your hx may not put out as much exhaust as a z6. Is the z6 map compatible with the hx motor?

Neither cam will work in the hx head....

 

since when did the y5 motor have aftermarket cams?

 

pulls a little better with 4 degrees of advance on the timing map and 9-10 psi of boost, running uberdata btw, and tightened a hose clamp that goes to the intercooler that was a little loose

 

Do you want to let everyone know how you got the zex cam into your Y5??

Something is really wrong here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nullifyme &raquo;</TD></TR><TR><TD CLASS="quote">since when did the y5 motor have aftermarket cams?</TD></TR></TABLE>

it doesnt.

your friend needs to put a stock y5 cam in there asap before he breaks something...

i dont even know if the y5 head has lost motions to carry the vtec lobes on a z6/y8 cam at all..

 

he bought it like that, but you can hear and feel a difference at 5,ooo rpm not 3000 like the hx is susposed to


Modified by alexsracing at 11:34 AM 1/1/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alexsracing &raquo;</TD></TR><TR><TD CLASS="quote">he bought it like that, but you can hear and feel a difference at 5,ooo rpm not 3000 like the hx is susposed to </TD></TR></TABLE>

That's probably the turbo spooling I would think

 

This is actually really easy to explain. On the Y5 head, when vtec is not engaged, one of your intake valves is only barely opening. You get the power at 5k rpm due to high lift from the vtec lobe, and the other valve actually opening. I say kick the vtec point down to 2k-2.5k and it will scream.

 

ok cool, ill lower the vtec point