Comptech SC problem - Page 2

DAYTA · 05-05-2009, 05:09 PM

Have you driven the car, and if so does it feel about the same as before?

Next:

1) Where do you have the VTEC engagement point/window?
2) What kind of timing are you running?
3) What does the dyno plot look like (hp and tq curves)?
4) Have you checked for any exhaust leaks or obstructions?

If all of those check out fine and your other measurements are good (A/F = in the low/mid 12s, boost = 5-6psi, ~20 degrees of cam advance, etc) then I would try going to another dyno. Assuming your parameters don't change, it doesn't make sense to have a 20whp+ difference between back-to-back pulls on the same dyno.

nizmot · 05-05-2009, 05:46 PM

it's not whp it's just 215 on the motor. That's the problem just 25 hp above stock.

audioserf · 05-05-2009, 06:01 PM

Have you driven the car? How does it feel? Check all of the things DAYTA mentions.

nizmot · 05-05-2009, 06:09 PM

I haven't driven my car but my friend told me it is slow. He is not a newb at tuning

Hope tomorrow we sort the thing out so I can tell you that we got some nice numbers. Plus I'll be finally able to post in the 180mph TSX thread.

Good night(Its 23:00 here)

Highrev1 · 05-05-2009, 06:43 PM

Unichip seems like it could be the problem. Although it can change cam angles, fuel and ignition curves, it stores only one map and it will not compensate for barometric pressure, elevation, humidity, temperature. Could prove lethal for your engine during a trip to the mountains.

nizmot · 05-06-2009, 01:23 PM

2shared - download Fotografija306.jpg

2shared - download Fotografija307.jpg

These are the plots.
Suggestions now.

U can see different runs cca. 1 min between each.

audioserf · 05-06-2009, 08:17 PM

I wish I had ideas - sorry man. I hope someone helps you out. I know how frustrating it is to get your car back supercharged and have it not run right.

I've got a dyno session booked for Friday afternoon -- if I don't hit the right numbers, I'm going to have my CT ACM replaced and possibly get Hondata to reflash my ECU again.

nizmot · 05-07-2009, 04:32 AM

Thank you we hope it's the knock sensor. My tuner is going to relocate the knock sensor. He says that he had many problems with VTIs and other Hondas because of the knock sensor. Till u get up we might have done finally the tune and I get my car back.

audioserf · 05-07-2009, 10:24 AM

Jamie (tech who works for Josh @ Excelerate) actually told me the other day that he thinks the knock sensor should relocate to the back of the block with the supercharger install, and that he's not sure why Comptech doesn't recommend that. He saw a perfect spot for it. Since replacing my sensor has gotten rid of my CEL, we didn't do that (would have required a wire harness extension), but it's something to think about.

falken · 05-07-2009, 01:43 PM

i know a some one who had the same problem with his sc and it was leaking that was the problem ...^check you're installation

audioserf · 05-07-2009, 01:58 PM

We hooked up a boost gauge and I was making 5-6psi during my runs, so I don't know if the OP did that, but I wasn't having a boost leak issue.

nizmot: have you checked a boost gauge to make sure you're hitting full boost? It seems like you have, since you mention hitting 6psi.

Tsx536 · 05-07-2009, 02:28 PM

In your first dyno pic, it looks like Vtec is kicking in at 6K RPMs. There is a big HP jump there. My big question would be on the unichip. What do you have Vtec set at?

If I were you, I would set the Vtec engagement point lower, set the cam angle to 25 degrees. And tune ignition and AF ratio.

If the Unichip doesn't have tables for each cam angle like HighRev1 says, I would be concerned about using that setup.

nizmot · 05-09-2009, 01:20 PM

Update:
We relocated the knock sensor and the curves are much better and runs are quite similar. Still we don't get much HP.

On Monday another tech is comming to see where is the problem. Hope we get it fixed.

If anyone has anymore ideas post them we'll check them all.

THX

audioserf · 05-09-2009, 01:37 PM

Make sure you're going into Vtec.

I dyno'd again last night with awful results, even with a new knock sensor. My car's not going into Vtec. There's no visible (dyno plot or tach needle movement) or audible cam changeover happening. I'm making nearly all my torque but am short 60whp. My ACM or ECU reflash is bad -- that has to be what's keeping my car off the higher cam. Time to make some phonecalls.

cdiggisapimp · 05-09-2009, 02:33 PM

Quote:

Originally Posted by nizmot

Update:
We relocated the knock sensor and the curves are much better and runs are quite similar. Still we don't get much HP.

On Monday another tech is comming to see where is the problem. Hope we get it fixed.

If anyone has anymore ideas post them we'll check them all.

THX

Quote:

Originally Posted by audioserf

Make sure you're going into Vtec.

I dyno'd again last night with awful results, even with a new knock sensor. My car's not going into Vtec. There's no visible (dyno plot or tach needle movement) or audible cam changeover happening. I'm making nearly all my torque but am short 60whp. My ACM or ECU reflash is bad -- that has to be what's keeping my car off the higher cam. Time to make some phonecalls.

man, good luck to both of you. i hope you are putting down the correct numbers in the near future.