Its a b16a2 with 9:1 je pistons, eagle rods, acl bearings, arp studs, rev valvetrain and gsr cams ( supposively). the turbo is a 50 trim with a 50a/r cold and 48 a/r hot.

For some reason when the car reaches the vtec engagement point the car loses power instead of gaining. The timing is perfect. Now my question is will this happen if you use non vtec cams on a vtec motor???? Im really concerned i bought the cams for 30 bux off of ebay.

thanks

 

First off what tuning program are you running

And as far as the cams, that would worry me right away. I wouldnt trust much from ebay...

 

Definately sounds like a cam problem.

If the cams are non-vtec, at the crossover point, the ECu would dump in extra fuel and timing and such to make power with the VTEC cam, but without the extra lobe, it would lose power, like you stated happened.

I'm not a B-series guy, but shouldn't there be a definate way to see a two-lobe vtec cam from a regualr non-vtec cam?

 

you cant use non-vtec cams in a vtec motor. good luck

 

im using crome pro. Im not the tuner. But the tuner is stumped. I believe its the cams that are my problem but i wanted to see if anyone has expierienced the same problem. I broke my oil pump a while back and while i was changing the pump i also changed the cams and thats when the problem started to happen. Has anyone had this problem before?

 

Honestly everything seems to lead to the cams, you can always put back in the stock cams and see if everything is back to ok, if not i would lean towards the tuner.

 

its definately not the tuner. he tuned a car right before mine with a pretty similar setup with no problems. My car has had this problem since i changed the cams and it was untuned.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92redhatch &raquo;</TD></TR><TR><TD CLASS="quote">My car has had this problem since i changed the cams</TD></TR></TABLE>

Sounds suspicious. Maybe check out the clutch? I doubt it would be the cams though, it doesn't sound like it.

 

not the clutch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92redhatch &raquo;</TD></TR><TR><TD CLASS="quote">not the clutch</TD></TR></TABLE>

I didn't think I needed to write how completely sarcastic I was being with my last post. Car ran OK. Changed cams. Car runs like ****. It's pretty obvious.

 

so u think its the cams?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92redhatch &raquo;</TD></TR><TR><TD CLASS="quote">so u think its the cams?</TD></TR></TABLE>

It makes sense if your car was running fine before and the only thing you swapped was the cams.

 

Ya i understand it should be the cams. Has this happened to anyone else???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92redhatch &raquo;</TD></TR><TR><TD CLASS="quote">For some reason when the car reaches the vtec engagement point the car loses power instead of gaining. The timing is perfect. Now my question is will this happen if you use non vtec cams on a vtec motor???? Im really concerned i bought the cams for 30 bux off of ebay.

thanks</TD></TR></TABLE>

You get what you pay for. You can distinguish non-vtec cams from vtec cams due to the number of lobes on the camshaft.


vtAk


nonvtAk

http://www.cranecams.com/image...).jpg (not resized)

 

thanks i know that the vtec has more lobes than the non vtec. Has anyone besides me had this problem.

 

maybe they are some super radical vtec lobes and u need to set the timing and fuel accordingly.

And make sure ur cars ignition is in sync with the tuning software also.

16degrees on the light means 16 degrees at the first colum.

 

lots of people use gsr cams and have no issues. Thats why im thinking that my problem is the cams. i changed the cams maybe 2 months ago.

 

has anyone had this problem besides me?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92redhatch &raquo;</TD></TR><TR><TD CLASS="quote">has anyone had this problem besides me?</TD></TR></TABLE>

https://honda-tech.com/zerosearch

Search... it's an awesome feature. Maybe your timing belt is off a tooth? Post pictures of the dyno chart... that would help a lot.

 

ive searched. The timing belt was off by a tooth and we fixed it and re dynoed it and it still has the same problem we just picked up 10whp.

 

i was just told that my cams have to be vtec cams because if they were not vtec cams they wouldn't fit on my b16. So what can my problem be???

Someone here on honda tech had a similar problem because the put the intake rocker assembly on the exhaust side and vice versa but i was told thats not possible on a b series what do you guys think?

 

Put the stock cams back in and then let us know...

 

Hehe, yea it would be pretty hard to put non-vtec cams in there and they are obviously different from the number of lobes as stated. Post the dyno sheet, bin file and setup list then I'm sure you will get some more insightful responses.

Also like was stated you can just swap in some stock cams and see how it does with those, that would eliminate or reaffirm the "cam" variable. GL.


Modified by KeyserSoze at 5:04 PM 2/1/2007

 

ya hopefully things will work out. My LMA is working perfectly fine. Im going to see if any of the rockers have any pins sticking out.

 

The only thing i could think of was valve adjustment
maybe one is hanging up or something

hope this helps

d